LIBRARY OF THE UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN Gg557 £3 Un3iw ENGINEER DEPARTMENT, U. S. ARMY. REPORT UPON “< Untrep Staves GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN, IN CHARGE OF FIRST LIEUT. GEO. M. WHEELER, CORPS OF ENGINEERS, U.S. ARMY, UNDER THE DIRECTION OF BRIG. GEN. A. A. HUMPHREYS, CHIEF OF ENGINEERS, U. S. ARMY. PUBLISHED BY AUTHORITY OF THE HONORABLE THE SECRETARY OF WAR, IN ACCORDANCE WITH ACTS OF CONGRESS OF JUNE 23, 1874, AND FEBRUARY 15, 1875. IN SEVEN VOLUMES, ACCOMPANIED BY ONE TOPOGRAPHICAL AND ONE GEOLOGICAL ATLAS. VOL. IL—ASTRONOMY AND BAROMETRIC HYPSOMETRY. WASHINGTON: GOVERNMENT PRINTING OFFICE. ESiG Digitized by the Internet Archive in 2011 with funding from University of Illinois Uroana-Champaign http://www.archive.org/details/reportuponunitedO2whee NOAA Ee Seven volumes, accompanied by one Topographical and one Geological Atlas, embrace reports upon Geographical Surveys of the territory of the United States West of the One hundredth Meridian of longitude from Greenwich, as follows: Volume I—Geographical Report. Volume II.—Astronomy and Barometric Hypsometry. Volume III.—Geology and Mineralogy. Volume IV.—Palzontology. Volume V.—Zodlogy. Volume VI.—Botany. Volume VII—Archeology. The Topographical Atlas edition, consisting of Title-Page, Legend, and Conventional Sign Sheets, Index, Progress and Basin Maps, and Sheets Nos. 49, 50, 57, 58, 59, 66, 67, 75, 76, 88, 53(C), 61(B), 61(C), 61(C sub.), 61 (D), 65 (D), 69 (B), 69 (D), 70 (A), 70 (C), 78 (B), have been issued at date of sending forward the MS. of this volume. Other sheets, of which there are seventeen in various stages of completion, will follow as rapidly as they can be prepared, engraved, and printed. Sheets 53(C), 61 (B), 61(C), 61(D), 65 (D), 69(B), 69 (D), 70 (A), 70(C), and 78(B), are projected upon a.scale of 1 inch to 4 miles, while the scale of 1 inch to 2 miles has been used for sheet 61(C sub.), the latter embracing a part of the San Juan mining region of Southwestern Colorado. The following Geological Maps, forming a part of those supplementing Ill IV NOTE. Volume III, based upon the topographical sheets, have been published, i.e., Title-Page, Index Sheet, Restored Outline of Lake Bonneville, Nos. 40, 59, & of 58, and 4 of 66, 66, 67, 75, 76, and 83. Other sheets are in course of completion The Topographical Atlas referred to will comprise 95 sheets, on a scale of 1 inch to 8 miles, numbered consecutively from 1 to 95, inclusive, while the “Geological Atlas” will consist of the same number, using the topographical maps as a base. (See Progress Map of 1877.) The quarto reports embrace the results of the special branches of the Survey that are completed at the date at which each is separately submitted, while annual reports of the operations of the work, showing its progress during the fiscal year, are regularly submitted to the Chief of Engineers, and have appeared as appendixes to his Annual Reports. U. 8. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN, ist Lieut. GEO. M. WHEELER, Corps or ENGINEERS, U. 8S. ARMY, IN CHARGE. REPORTS UPON THE ASTRONOMICAL DETERMINATIONS AT MAIN STATIONS OCCUPIED IN THE YEARS 1872, 1873, AND 1874, RESULTS OF BAROMETRIC OBSERVATIONS OF THE YEARS 1871, 1872, 1873, 1874, AND 1875. IN TWO PARTS. ILLUSTRATED BY TWENTY-TWO PLATES AND THREE WOOD-CUTS. € TABLE OF CONTENTS. PA rE: Page TEMP ROMDRANSMIED DAI 256 s-e ieee cree sce cmweelemmieime=e vere ca 13 Order of sequence for an astronomical report...--- --------.--+.-+---- +--- 3 ANID DRENTOTHIOINS RING! SIGNS go sv oc0 c2boan dence Spoor oe eesqaeagocer odecodea5oocr 4 SPECIAL ASTRONOMICAL REPORTS: Ogden, Utah, 1873 and 1874 .......... 22-2 eee ce eee eee ee eee 7-55 Beaver, Utah, 1872 --.. .--.0- 11-220 2 oe e nen see ener eens we ee ee 59-71 Pioche, Nev., 1872.... .. fagie SOE GU RO BCID ARE ABER GEARED ae Sosmome 75-96 Gunnison, Utah, 1872 .........--.------ 1 e eee ee eee eee ee eee eee 97-125 Green River, Wyo., 1873 ....-.---- +--+ --222- eee ee cee eee -.-. 129-154 Winnemucca, Nev., 1873 .......----.--0- -e eee ee eee eee cee eee 157-182 Virginia City, Nev., 1873 .......--- --. +--+ e222 eee eee cee e eee ee 185-210 Georgetown, Colo., 1873. ..-....-.--- ++ 2-22 eee eee tee eee eee eee 213-237 Hughes, Colo., 1873 ......... .----- +--+ eee eee eee tree eee eee 241-263 Labran, Colo., 1873 .....- .-.--- 0... -- ee ene eet eee teen eens 267-288 _ Trinidad, Colo., 1873 ....-..-- a ie treks ioe ders wicca hess os MAGEE © as aS 291-312 Gay Winn We Wigs, IBY Ge aor es sseaecbooceeCheC OREO ReUUGdeGm cla. 315-335 Santa Fé, N. Mex., 1873...... .-..--- 2-2-2 eee ee cee eee eee tee eee 339-369 Bozeman, Mont., 1873 ..... .----- -----5 - ss see ee eet ee ee ee eee 373-384 Las Vegas, N. Mex., 1874........---- 0-0 - 22) eee ee eee eee eee eee 387-401 Cimarron, N. Mex., 1874.......---- .----0 ee eee cee ee ee eee eee 405-415 Sidney Barracks, Nebr., 1874 ...---.---- - aa ORO COS OE OSES EOS 419-432 Julesburg, Colo., 1874...----..--- . ee ees eee ee eee eee eee teres 435-448 Won TA Bires Niele, Il Sek Aas oe goeore osaete cos Reis oe. Caeisys ace 451-458 Descriptive report on station at Salt Lake City, 1873... ....-..- ----..--- 461-467 Description of observatory and site at Ogden, with information regarding MONUMCRES eyelet = - sow oe ROU Rob aan ae hoe ab ao saan EE 469-471 Description ef personal-equation instrument .....---- .----- -.---+-++- +++: 475-483 Lists of geographical positions, with results as to personal error..-..------- 485-491 LETTER OF TRANSMITTAL ...-- BOOS) Sega ite Oa EE sre mea evst oe Stasis crates 495 REPORT ON BAROMETRIC HYPSOMETRY: Introduction -...-... 520-22 1-2. esse we eee cee re nee ve cee aeee ee 497 Instruments, comparisons, and instrumental errors ..... -.--.------- 497 IATIEROLGDATOMELETS <2 5.6 - 2. -- eee -- eee eRe aes HS eee 503-507 Vu Vul TABLE OF CONTENTS. Page Report ON BAROMETRIC HypsOMETRY—Continued. : Observations 2225.2:55 2 epee aoe en een ee tetas era a 508-509 Office reductions. ..... Brad See ee rir pare Bente Rages Sante Pe yd AS eel awe le gists 509-524 Reduotion of sneroid observations: =. - 2 = eee ae eee 524-529 Summary of hourly observations (tables) ......--......------.-------- ---. 530-550 Hlorary tables) 475 PLATE IV. Sketch of Winnemucca, Nev., surveyed in 1873 ......--.--+------+---+--++-- ? Fort Fred Steele, Wyo., surveyed in 1873......---.--+-+ ----++--+- | - Laramie, Wyo., surveyed in 1873.-...-.-.---.-- +--+ ----ee tere tees . 491 Green River, Wyo., surveyed in 1873 ....-.-....-.------+-++++----5-- Carlin, Nev., surveyed in 1873 ....--.----------- +--+ -eeee teers | Battle Mountain, Nev., surveyed in 1873.....-..---..----+--++-+--+-> S PLATE V. Sketch of Pioche, Nev., surveyed in 1872 ......----.-.--- - -+----+-+-+---- ») Virginia City, Nev., surveyed in 1873....--..-. Me EBC OE SAE | Hughes, Colo., surveyed in 1873....-..----.-----+--+-------++-+ +++-- \ 491 Colorado Springs, Colo., surveyed in 187376 ._-......-- Pe Soro | Labran, Colo., surveyed in 1873 -......-- ----.+- + +----++-----+-+: | Trinidad, Colo., surveyed in 1873....-..--..-. ----+---+--5 e 22+ -+--- \ PLATE VI. Sketch of Beaver, Utah, surveyed in 1872 ..:.......-. Be ae Gee Toe 7 Cheyenne, Wyo., surveved in 1873...... --.-.----- Goad LOO ISEB | Fort Union, N. Mex., surveyed in 1874........--- .---- ----++---+: . 491 Georgetown, Colo., surveyed in 1873........... ---------- +e -e ee eee: : Saint George, Utah, surveyed in 1872 ......---.---.-+--+-+ 0+ ---5 0-55 | Fort Marcy (Santa 6), N. Mex., surveyed in 187375 ......-----.-- \ x LIST OF PLATES. Puares VII, VIII, LX, X. Diurnal barometric curvessos se erases eee ee ee sees ete tee "566 PLATES XI, XII, XIII. Diurnal temperature oscillation ......-. Jalota So sjevalare ASSO OnE Sng ae amee 566 PLATES XIV, XV, XVI. Mean differences wet and dry bulb thermometers....-...---.--..----..------- 566 PLATES XVII, XVIII, XIX. Diurnal force-of vapor s.2..:.+- = <2s 8052 oes eee Loe eee eee eee eee 566 PLATES XX, XXI, XXII. Relative) Wumiait ype sae eae ee eee ee 566 Plates 1 to 6, inclusive, have been produced by the photo-lithographic process at the establishment of the Graphic Company, New York City, under the direction of L. VAN CAMPEN. The engraving and printing of the remaining plates from 7 to 22, inclusive, have been furnished by JULIUS BIEN, of New York City. LETTER OF TRANSMITTAL. Unirep Srates ENGINEER OFFICE, GrocrapHicaL Surveys West or THE 100TH MERIDIAN, Washington, D. C., March 1%, 1877. Grnera: I have the honor to submit herewith, for publication, the reports to constitute Volume II of those authorized by acts of Congress, approved June 23, 1874, and February 15, 1875. The volume consists of the several reports upon determinations at main astronomical stations, with lists of geographical positions and altitudes of prominent points, together with results from the barometric work. The necessity for astronomical determinations at points in the western interior, contiguous to the fields of survey, became apparent at an early stage of the work, since the principal longitudes in the region occupied were necessarily approximate for want of telegraphic communication, and other essentials of accuracy. The latitude determinations have been found to possess a much greater degree of accuracy, and are the only ones which could be relied upon, except an extremely limited number of longitudes. It is believed that the methods adopted for the observations and their com- putation have proven adequate for the requirements of standard field astronomical work, and the results are so grouped as to show in each case their greater or lesser probable values. The importance of these astro- nomical determinations with stations and meridian lines usually marked with permanent monuments in the prosecution of extended geographical surveys cannot be overestimated. In regions remote from railroad com- munication, more portable instruments and different methods, similar to those adopted in 1869, can be used with efficiency. xI XII LETTER OF TRANSMITTAL. Prior to the establishment of a survey covering the entire interior of the country, it is not presumable that more elaborate means will be used for the fixing of geographical positions, so necessary in the construction of detailed topographical maps, since the cost of the establishment, in the rough mountain interior, of geodetic points of the highest order of accuracy is not justified by the uses to which they may be applied in the present development of connected surveys of this region. When topographical results are acknowledged as a want more frequent and wide-spread, a great geodetic survey of the entire territory of the United States may be begun; meanwhile, the geodesy of the mountains as it is now conducted, demanding primarily the determination of initial points at which measured and devel- oped bases and subsequent schemes of triangulation may be laid out, such as shall meet present requirements, must be confined to such as are needed more particularly for mapping purposes, and for such geodetic points as may be required by the surveys of the public lands. The observatory at Ogden, Utah, remains incomplete, but the impor- tance of it, and such others as have been recommended to be established, suggests mention. This volume will be found not without value to the future compiler, because of the geographical positions and altitudes that it contains, and serves to show the operations and results in this section up to the close of the season of 1874. Lieut. William L. Marshall, Corps of Engineers, in charge of the baro- metric reductions from December 1, 1874, to August 8, 1876, submits the results of the labors of this section that had been previously carried on under the direction of Lieut. R. L. Hoxie, Corps of Engineers, after the plan of organization as laid down by the officer in charge. It was at one time contemplated to extend the scope of the hourly observations so that the results would have been more widely distributed, but the additional force required in observations for altitude determinations and the temporary cessation of the annual occupancy of main astronomical stations, have led to their abandonment in other than exceptional cases. His report is a summary of the barometric and hypsometric observations, and results to date; other than those submitted in the regular annual reports. LETTER OF TRANSMITTAL. XI The methods followed in the reduction of the barometric observations for altitudes have, with some slight modification in case of the aneroid readings, been those given in the invaluable treatise upon this subject by Lieut. Col. R. 8. Williamson, Corps of Engineers, and forming Professional Paper No. 15, of the Engineer Department, United States Army. The gradual and constant improvement in this section of the survey has been noticeable and merits approval. I take this occasion to signify appreciation of the great industry, often exhibited under the most trying circumstances, of the astronomical and meteorological observers, most of whose names appear in the several reports, while the results as shown are, in a measure, the test’ of their success. All of which is respectfully submitted. Gro. M. WHEELER, Lieutenant of Engineers, in charge. Brig. Gen. A. A. Humpnreys, Chief of Engineers, United States Army. yD Shae Re 4 Satin U. 8. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN, ist Lrzut. GEO. M. WHEELER, Corrs or ENGINEERS, U. 8. ARMY, IN CHARGE. ego) 2s Ree REPORTS UPON THE ASTRONOMICAL DETERMINATIONS AT MAIN STATIONS IN NEVADA, UTAH, MONTANA, WYOMING, NEBRASKA, COLORADO, AND NEW MEXICO, OCCUPIED IN THE YEARS 1872, 1878, AND 1874, BY Dr. F. KAMPF, JOHN H. CLARK, WM. W. MARYATT, AnD Pror. T. H. SAFFORD. WITH LISTS OF GEOGRAPHICAL POSITIONS, &c. \,} | ORDER OF SEQUENCE FOR AN ASTRONOMICAL REPORT AT MAIN OR PRIMARY FIELD-STATIONS. Longitude by telegraph; latitude by zenith-telescope (Talcot?s method). 1. Geographical position of station; details of physical geography. 2. Meteorological conditions, both general and special; the latter while observations were made. 3. Description of observatory; personnel of party. 4. Description of instruments; instrumental values. 5. Points with which connections were made; nights of observation and observers; names of computers. 6. Circumstances of telegraphic communication; name of telegraph- operator, and of the company whose wire has been employed; length of circuit, number of batteries and repeaters. 7. Tabulation of stars used. 8. Uniform tables of time-reductions at receiving and sending stations. 9. Grouping of series of exchange-signals, including means of single and serial results. 10. Personal equation. . 11. Probable error by least squares. 12. Reduction. of the latitude-observations properly grouped, with discussion of results. 13. Resulting astronomical co-ordinates. 4 ASTRONOMY. ABBREVIATIONS AND SIGNS. a, b, = azimuth, level, and collimation corrections. A, B, C= azimuth, level, and collimation factors. T — observed time reduced to mean of wires and corrected for rate, T’ = observed time corrected for instrumental errors. AR= apparent right ascension of star. A,T = resulting error of the chronometer after the mean of the wires is corrected for rate and level. AT, = adopted mean error of chronometer. 6T = AT,— AT. AT =error of the chronometer. v = difference between final correction of chronometer and AT. U. 8. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN, ist Lirut. GEO. M. WHEELER, Corrs or ENGINEERS, U. 8. ARMY, IN CHARGE. RESULTS OBSERVATIONS MADE BY DR. F. KAMPF, PROF, J. R. EASTMAN, JOHN H. CLARK, AND 0. B. WHEELER, IN THE DETERMINATION OF THE ASTRONOMICAL CO-ORDINATES OF OBSERVATORY AT OGDEN, UTAH, SEASONS OF 1873 AND 1874. COMPUTATIONS BY Dr. F. KAMPF anp Pror. J. R. EASTMAN. ERRATA, VOL. II. Page 491, Altitude of Fort Garland, Colo., for 4,853.7 read 7,937-0—R. R. level. Page 556, Altitude of Agua Caliente, Cal., for 3,618.6 read 724.8 Page 557, Altitude of Buffalo Peak, Colo., for 3,328.6 read 13,328.6 Page 557, Altitude of Bullion City, Nev., for 16,386.4 read 6,386.4 Page 558, Altitude of Fort Craig, N. Mex., for 4,619.0 read 4,447.5 Page 559, Altitude of Engineer Pk., Colo., for 13,076.4 read 13,277.4 Page 559, Altitude of Granite Springs, Cal., for 4,115.2 read 4,015.2 Page 563, Altitude of Provo, Utah, for 4,544.0 read 4,567.3 Page 563, Altitude of Rosita (sun dial), Colo., for 8,932.0 read 8,736.0 Page 564, Altitude of San Carlos Agency, Ariz., for 2,456.0 read 2,558.7 Page 565, Altitude of Trinidad, Colo., for 6,043.1 read 5,989.9 . Page 566, Altitude of Winnemucca, Nev., (Signal Office,) for 4,365.6 read 4,355.0 4 ASTRONOMY. ABBREVIATIONS AND SIGNS. a, b, ¢= azimuth, level, and collimation corrections. A, B, C = azimuth, level, and collimation factors. T = observed time reduced to mean of wires and corrected for rate. T’ = observed time corrected for instrumental errors. AR = apparent right ascension of star. A,T = resulting error of the chronometer after the mean of the wires is corrected for rate and level. AT, = adopted mean error of chronometer. oT = AT,— AT. AT =error of the chronometer. v — difference between final correction of chronometer and AT. U. 8. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN, ist LiruT. GEO. M. WHEELER, Corrs or ENGINEERS, U. 8. ARMY, IN CHARGE. RESULTS OBSERVATIONS MADE BY DR. F. KAMPF, PROF, J. R. EASTMAN, JOHN H. CLARK, AND 0. B, WHEELER, IN THE DETERMINATION OF THE ASTRONOMICAL CO-ORDINATES OF OBSERVATORY AT OGDEN, UTAH, SEASONS OF 1873 AND 1874. COMPUTATIONS BY Dr. F. KAMPF anp Pror. J. R. EASTMAN. OGD BINS (WP AcE: GEOGRAPHICAL POSITION OF STATION. Longitude, . . 1119 59/ 54.64 + 0.40 west from Greenwich. 34° 56! 52/84 west from U.S. Naval Observatory, Wash- : ington, D. C. Latitude,. . . 419 13/ 08.56 + 0.03 north. Altitude of observatory above sea (railroad level), 4374.0 feet. Ogden is a Mormon town of nearly 2,000 inhabitants, the junction of the Union Pacific and Central Pacific Railroads. The astronomical station is situated on a low hill west of the town, near the Utah Central Railroad, about 2,000 feet from the Weber River, which flows by in a southerly direction; the niveau of the stream being about 100 feet below the flecr of the observatory. DESCRIPTION OF OBSERVATORY. The foundation of this building is of granite and sandstone, and rises 34 feet above the ground, inclosing a cellar, which has a depth of 4 feet from the floor. The structure consists of three parts: the eastern wing, which is intended for the use of the officer in charge; the western wing, occupied as an observing transit room; and the center, which will contain a solid pyramidal pier to support an equatorial. The dimensions of the two wings are the same, being 11 feet by 15 feet on the ground and 94 feet in height. The central compartment is 15 feet square, and will have two floors. The eastern room is lighted by six windows, each 2¢ feet by 63 feet, which, in size and position, are similar to the apertures which are cut into the western wing for purposes of meridional observation. The latter openings extend to the top of the wall and thence across the roof, and are closed by vertical shutters upon the side of the building and a horizontal 7 8 ASTRONOMY. pair upon the top, by which the interior is sheltered from the dust and rain. The observing room contains two piers of solid sandstone, which are planted 6 feet below the floor, and protrude 2 feet above the same. A third pier, which is of brick-work, insulated, and intended to carry a clock, has been erected in the southeastern corner of the observing room. Chronographic and telegraphic apparatus are placed on separate stands. The whole building is covered with a heavy tin roof. CONNECTIONS—-OBSERVERS—METHODS. The longitude of Ogden observatory was determined in three different ways: first, Ogden was connected with Salt Lake City observatory in 1873, by Dr. F. Kampf and Mr. John H. Clark, observers; second, Detroit was connected with Ogden in 1873 by Mr. O. B. Wheeler, assistant in the United States Lake Survey, and Dr. F. Kampf, observers; and, third, the United States Naval Observatory at Washington, D.C., was connected with Ogden in 1874, by Prof. J. R. Eastman, of the Naval Observatory, and Mr. John H. Clark, observers. In all cases, observations were recorded at both places by means of the chronograph, and the longitude was deter- mined by automatic signals of the chronometer, as well as by arbitrary breaks on the chronograph. In reference to the first determination, it should be stated that each observer reduced his own observations, after leaving the field, by means of the method of least squares. A description of the second determination will be found in the report of the Chief of Engineers for 1874, page 434 et seg. The observations taken at Detroit have been computed in a different way from those made at Ogden, and have afterward been recomputed by the method employed in this office. The result thereby attained is taken for the comparison of the final results. The last determination, which was obtained in 1874 by a direct con- nection with Washington, is based upon the computations made by Professor Eastman and those of Dr. F. Kampf, who reduced the corresponding Ogden observations. OBSERVATORY STATION—OGDEN, UTAH—1873~74. g) INSTRUMENTS—TELEGRAPHIC COMMUNICATION. In the season of 1873, the Wiirdemann combined transit-instrument No. 28 was used. This had been previously employed in the determination of Colorado Springs, and is described, with its values, in the report on that station, published in 1874. In 1874, observations for latitude were made with the same instrument, but the time observations were taken with the 32-inch astronomical transit Wiirdemann No. 29. All telegraphic signals were transmitted over the wires of the Western Union Company. The length of cireuit from Ogden to Salt Lake was 37 miles; from Ogden to Detroit, 1,800 miles; and from Ogden to Washington, 2,365 miles. Signals were dispatched in 1873 by means of a battery of three Grove’s cells, belonging to the Survey; in 1874, a Hill battery of two cells was used. On the eastern routes, there were repeaters at. Cheyenne, Omaha, Chicago, Pittsburgh, and Harrisburgh. Tabulation of stars used for determination of time at Ogden, Utah ; Salt Lake City, Utah; and Detroit, Michigan, 1873. 1 SALT LAKE OGDEN. ciry. DETROIT. Name of star, Ealeed cl lel hl allccl el eet STS al SIAN el 2 [El eels C})y\e BE [Yad | [ID [SD ft] Sa [RR 29 Ps | OB 212 )e ca] ed pe | ee] | | | Sele lelelelelelelale B/s\o O/ Di S|o/Dl/P/O/ O/B) o/9/ OJ] v2/o/8/8)o/ 2/9 Slalelelzalelelalalelelalalejelalalalsislai2i2 +\+e/C Cl oless/Slel;slojel/sycioljse Cle le|/clol/o ea) ale ee ee 8 ole A hdl hdl bad SC) Qjielele olo|2 OIS/O/O/O/O}/SO/|Slao OIClO/O/Sl/oalol/elo o m|n2|O SISO [SIS |O|O O}R/O JOJO |O JO |2/2 O|O|O a ANGYOMCG =. sce sence ee po eees peewee one La fe = = -- x WAY (Oss 3es OSes A Sem ocesosco Soe Econ sd a = = 4 - x =a|\5e a CRESG I Ean se5> chesed Sooose casseeeess Ballas (6 Bale a x B @etiseeen teceeneseees ceosccleees ca sss= 4 = Zale i Sle e€ TS beta! Ses eR edcoannOS COM OES DS OSE EES 2 = Sa} | = X|-- NS STOR ESS Sipeseca bee ctOspEOC ear a rao bo Sal bse © IES n IDIREMAIN pene aoa see toss ae eee 25} Se 3 X]-- o DIRGINMN esae eae ae sacra eee eae A ee 7 -|X]-- a Cet oe, Sree oe eae Saseseee = 19c12: A sal (Le p LEG Ss .5eceesarcie soc ncscse pean esonad al P< [Be - B IPerselitee see fans cess sesectewealse se ge acai Ase ois) (eyes (ED) s Sees caer he ceonso seer be| foe) [e6||es| lool faq) |55] eet Pad) lac ¢ Arietis...--- SE nee etena bene pemerescoe at 154) et joo tot ee et Bl ee = a Belial lee 2 i) --|X]--[ee - & FAlsetee E f |x|. | ae 2 é SESCIE is é O} Ed) ee = a -|--]-- - 5e = B 10 ASTRONOMY. Tabulation of stars, é&c.—Continued. [—) MAM DRRETDWASCAGDAAMY OQ rRBreRA ANAS km eb oo ONE oO & =a a 7) Name of star. | September v9. | September 30. | October 1. SIDI 5 e255 soccsacoscss coo ose cose . IDFACONIS= S235 so5s0c0 cscs se cennceon be Sapitartices ce stem eee ee oe Sapittanil/ssencss 8 seco eee Draconisiss-ceeeens --< nee eee ee ee x Draconis sesso -ons desc oees ea toeeeeee x x xi JA ITELY Senos Gao Seon Cae booceon ronemcocl isa eels Walpeculta on one nee ee n= ||| Cy enigess sees oe = eee eee eee x FATE an aAssa econo sHacsoSzcn. coomecaaas ae Cygnigds. se ce 2 casnessneescencese ose ee Capricorn ceca. .-oe=saseaee ace eeeee- Copheiesaaceme see eee ee eee eenea es Capriconnitassse 2 -l Se Aquarii-....-.. oSco SOO deco nadaeo RODGEr| Me Saleeilsatls be alle: |ealipe|io%4 26) [Cepheil (B:) acess === -sseeeaemseca canes |ee EAB Sas eal een -- |X|] x] -- Pegasi ...-.. sooace Dose de aerscscgoscses Xx}. - : Zale --|X|--|--]--|<]X Pepaslineec es. — 52-5 doen aatelasaort akialeo\| Sa call eee a bi | ell BE SCUNG Copheipemeence eaves eecereccse see ce seh ees B 6c] |5e) [sa Iso] P<) Beal ee Sa||ec x -|X ET™TODRO YVTPNNS Andromed we esAe=: see teceieee st -soo ccee bx /sctteall= 2 Sales Bae va LEG ST Cony BOGE Ea BaGh GAGS DECNE eee PAlloe|lzels ‘ ralle IPISCLOM BR Se eran eee e ce cieccc scsi ee ales - z > . IPISGIU Me nner ee ce eet eee ete amare ton ee Gel allscl el Sel ealoo) eelocl Selleeho e=|% 2 JENSU GNI ce eee Sega eet ae one ae Le allel Sel alice losilen| Gales SOO 12 ASTRONOMY. SEASON OF 1873. Observations and reductions for time taken at sending station. OGDEN, UTAH, SEPTEMBER 29, 1872. fis & Name of star. 7; Aa. Bb. Ce. sup AR. | AT. og | hm 4 4, 8, 8, hm 8 ihm. @ ™. &8. Wai] 2) UNE seb clne sae 19 15 11,08 |— 0,70 |-+- 0.01 |-+- 0.82 |19 15 11.21 |18 32 20.22 | —42 31.93 5a ete 9 ey eee, 22 42.95 |— 0.40 |— 0,01 |-+ 0,83 22 43.40 40 11.29 32.11 Walle! LTB yas ass ep a0n 27 57.66 |— 1.59 |— 0.01 |+ 0.77 27 56. BS 45 24,58 02, 25 W.| 0 Draconis.......- 31 45,03 |-- 5, 96 0,00 |+- 1,25 31 52, 24 A9 20, 02 32, 22 W.|e Aquil~......... 36 28,98 |\— 4,47 0,00 |-- 0,66 36 25.17 53 52.97 32, 20 Wale MAGUilD t555655-- 42 12, 10-\— 4,77 0,00 |-+- 0, 67 42 08. 00 49 35,78 32, 22 E. | 6 Draconis........ 54 54,16 |-4-11.43 |— 0,26 |— 1.66 55 03.67 |19 12 31.49 22, 18 E. | 7 Draconis........ 20 00 15,31 |4-18, 08 |— 0.32 |— 2.21 20 00 30, #6 17 50.76 32.10 Be Oyen eels es. a. 2 08 12,97 |— 2.58 |— 0.12 |— 0.72 08 09.55 25 37.45 32.10 EN el OF fa ie eae 09 01.65 |4- 2,88 |— 0.17 |— 1.02 09 03,34 26 31.21 22,13 u. | « Aguila ........- 12 45.79 |— 7.55 |— 0.07 |— 0,65 12 37, 52 30 05,40 | —42 32,12 Maan 6b :194 0" local siderodl time's. 22.50. ave-S lbs ovpwsstesee seis dex toe rsls ssn —42 32.16 NORMAL EQUATIONS. O=-+ 1.46 +4 11.00dt— 1.644’ +4 2.000 dt = — 0.16 0=— 010— 1.646t-+- 6.18 a'— 8.40¢ a’ =— 04.94 O=-+ 13.95 + 2.00 d61— 8.80 a/ + 34.24 ¢ c =—0*.64 Adopted azimuth (to avoid Jarge numbers) = —9*.00; therefore, a—=— 9*.94. OGDEN, UTAH, SEPTEMBER 29, 1873. AR. AT. Me Ms 9B, 8. 8. 8. Re ts 78s) || Os, 218) KE. | 13 H. Cephei......./22 17 31.60 |-- 5.00 0.00 |— 1,08 )22 17 35.52 121 35 03.27 2 32. 25 EK. ie Cephelicsiscyes 22 24.45 |4-15. OL 0.00 |— 1,78 22 37.68 40 05,44 32.24 I, AQMAL sos ses ois 52 51.07 |— 7.71 |— 0.01 |— 0.60 52 42.75 |22 10 10.51 32,24 E. 4 Aquarii......... 57 48.04 |— 6,81 |— 0.01 |— 0,59 57 40.63 15 08, 30 32. 33 My |i7r. Agqnarii. sos... >. 23 01 29.30 |— 6.50 |— 0.01 |— 0,59 )23 01 22,20 18 49.99 32, 21 Writ, PORAGl sesess 25s. 17 46,92 |— 5.20 |4- 0.05 |+- 0.59 17 42.36 35 10.14 32, 22 W.|o Andromed@..... 38 38,40 |-- 0,10 |-4- 0,10 |4- 0.79 38 39, 39 56 07.34 32. 05 Wail @ SEAZAB secs cn ease 41 04,72 |— 4.70 |4- 0.07 |+4- 0.61 41 00.70 58 28,68 | —42 32,02 Mean at 225 12™ local piderenl time 0.20, s2cnen sncnns resces buvnesceans eRe Ee —42 32.19 NORMAL EQUATIONS. 0 =-+- 5.30 4- 8,00 dt ++ 1.08 a! 4- 4.49.0 dt= — 08.19 0 = + 2.13 + 1.08 dt4- 4.46. a! — 4.36.0 a! = — 14,01 0 = 4+- 7.95 +- 4.40 dt — 4.36 a! +4- 19.53 0 co =— 0459 Adopted azimuth = — 9".00; therefore, a= — 10°01, TIME DETERMINATIONS. 13 Observations and reductions for time taken at sending station—Continued., OGDEN, UTAH, SEPTEMBER 30, 1873. a g Name of star. i Aa. Bb. Co. Ie AR. AT. 3 hm. 8. 8. 8. & |hm 4. hm. 8 m. 8. Wn ia, Lhyrei. ccc... 25. 19 15 11.05 |— 0.77 0.00 |+- 0.87 |19 15 11.15 |18 32 39.25 | —42 31.90 E. | 5e Lyre ...--.-..--- 22 42,77 |— 0.44 0.00 |+ 0,88 22 43, 21 40 11,27 31.94 Mi |) Bo YL cece «inane 27 57.63 |— 1.76 0,00 |+ 0.82 27 56.69 45 24,56 32, 13 ik. | o Sagittarii -. 30 08.08 |—11, 40 0.00 |-+ 0.75 29 57, 43 AT 25. 35 32. 08 E. | 50 Draconis. -- 32 31.75 |-+-24. 35 0.00 |-- 2, 67 32 58.77 50 26, 43 32.34 Wile AQUU ge coe. ems 42 13.78 |— 5.31 |— 0.14 |— 0.71 42 07.62 59 35, 76 31. 26 W.|d Sagittarii -....-.. 52 57.24 |—10.18 |— 0.08 |— 0.72 52 46.26 |19 10 14.17 32. 09 W.| 5 Draconis.... ..-- 54 52.74 |+12.73 |— 0.32 |— 1.77 55 03.38 12 31.43 31.95 W.| 7 Draconis ....-.--. 20 00 12.91 |+20.14 |— 0.41 |— 2.35 |20 00 30.29 17 58. 68 31. 61 Viel st LOhfa WR OA eee gecne 08 13.12 |— 2.88 |— 0.15 |— 0.77 03 09, 32 25 37.43 | —42 31.89 Mean at 195 0™ local sidereal time ..---. .----- ------ --- 2-0 cree eee ee ween eee —42 31.98 woe ee —————eE—eE—E—EE——EeEE—E—E—eEeEe—E—EE————E—— eee NORMAL EQUATIONS, 0=— 7.44 + 10.00 dt— 2.21a'— 0.A7¢ ot = + 08.54 O=+13.48 — 2.21 dt+11714a/+ 0.34¢ a’ = — 18.07 0=— 25.73 — 0.47 dt-+ 0.34 a! + 43.55 0 ¢ =-+ 08.68 Adopted azimuth = — 108,00; a=—11*, 07. OGDEN, UTAH, SEPTEMBER 30, 1873. pee en ee I Name of star. T. Aa. Bb. Ce. Ne AR. AT. 5 hom 8 8. 8. 8. hm 8 (|hk.m 4&8. m 8. W.|y # Aquile........ 20 22 53.53 |— 5.77 |— 0.09 |— 0.67 |20 22 47.00 |19 40 15.02 | —42 31.98 W.|a Aquile........ 7 15.62 |— 5.99 |— 0.03 |— 0.67 27 08. 83 44 36,98 31.90 W.|e Draconis .-.... 30 54.61 |4+15.53 |— 0,26 |— 1.91 31 07.97 48 35. 94 32. 03 Weoliie s CVD rer cw an. = 34 51.71 |+ 3.44 |— 0.17 |— 1.07 34 53, 91 52 21.92 31.99 Wiellieteee ACI ee toe steers 0 .43 |— 0.09 |\— 0.67 40 29, 88 57 53. 00 31. 88 I. | 3lo'Cygni..----.-. ~44 0,00 |-- 0,95 52 11.25 |20 09 39, 36 31.89 IX. | a? Capricorni-. . 20 0.00 |-+- 0.68 53 34.65 11 02.60 32. 05 Ba Cygni-..-- .00 |-+ 0.01 |-+ 0.93 [21 19 39.58 37 07,77 31.81 KE. | y Delphini 199 |4+ 0.01 4+ 0.68} 2319.88] 40 97.84 32. 04 E. | Aquarii .65 [+ 0,01 |-+ 0.66 28 22.55 45 50.43 | —42 32.12 Mean at 20" 8™ local sidereal time...-...-4------ 2-22 ee eee eee ee erence eens | 42 31.97 NORMAL EQUATIONS. 0 = — 2.40 4- 10.00 dt + 1.77 a’ — 1.66¢ O=-+ 0.87 + 1.77 bt 4.49 a + 4.69¢ — 8.06 — 1.66 dt-+ 4.69 a! + 21.43 ¢ — 108.00; a = — 118.09. bt = + 08.53 a’ p— Tl 18.09 c = + 04.66 Adopted azimuth 14 ASTRONOMY. Observations and reductions for time taken at sending station—Continued. OGDEN, UTAH, OCTOBER 1, 1873. 5 Name of star. T. Aa. Bb. Ce. T. AR. AD S | is) ™;) | 18: 8. 8. e pm 8: L565 ob ie CB W.| d Sagittarii- ...... 19 52 55.60 |—10. 29 |— 0.01 |+ 0.72 |'9 52 46.02 |19 10 14.16 | —42 31.86 W.| 0d Draconis.-...--- 54 48.59 |+12.86 |— 0.07 |4+ 1.76 55 03.14 12 31.37 31.77 W.| 7 Draconis..-...-- 20 00 07.74 |+20.36 |— 0.11 |4 2.34 20 00 30.33 17 58.61 31.72 WW... 6: (Cygni.----2=-=5 08 11.33 |— 2.91 |— 0.04 |4+ 0.77 0S 09.15 25 37.41 31.74 Wile (Cyenin ss ose: 08 58.74 |+ 3.24 |— 0.06 |+ 1.08 09 03. 00 26 31.16 31.84 Bilee. Aquila e-- 2 ne- 12 46 36 |— 8.50 |— 0.09 |— 0.69 12 37.08 30 05. 37 31.71 B. | y Aquile ....--...] 22 53.34 |— 5.82 |— 0.11 |— 0.69 22 46.72 40 15.00 31.72 BK. | a Aquile .--..---- 27 15.57 |— 6.04 |— 0.11 |— 0.69 27 08.73 44 36.97 31.76 By. |e Draconis: ---..==- 30 54.30 |4+15.66 |— 0.30 |— 1.97 31 07.69 48 35. 89 31.80 B.. || p—Cygni-.--...----- 20 34 51.55 |+ 3.47 |— 0.19 |— 1.10 34 53.73 52 21.90 | —42 31.88 Meantatil 92'S 1 a0 localisiderealitimerene= soe eee eeseeeeesiee anes —42 31.775 NORMAL EQUATIONS. 0=— 1.11+ 10.00 dt—1.97 a’ — 22% ce dt = — 08.275 O=-+ 13.85 — 1.97 dt-+ 8.83 a' + 5.78¢ a’ =— 15.19 0=-+ 31.90 — 2.25 dt+ 5.78 a’ + 37.83 ¢ ec—— 05.63 Adopted azimuth =— 108,00; =— 115.19. OGDEN, UTAH, OCTOBER 1, 1873. = Name of star. is Aa. Bb. Ce. T. AR. ATs a hm 8. Hy 8. 8. ovine CRE WioetiSee EE Mm 8. 10h || Gh CNN ssceSesoce 21 19 39.55 |+ 1.02 |— 0.14 |— 0.93 |21 19 39.50 |)20 37 07.75 | —42 31.75 E. | y Delphini .-...... 23 25.43 |— 5.10 |— 0.07 |— 0.69 23 19.57 40 47.83 351.74 Bye) AGUARI a= = 28 31.94 |— 8.85 |— 0.07 |— 0.67 28 22.35 45 50, 42 31.93 Died (Oh ia po een aos 35 01.04 |— 0.11 |— 0.16 |— 0.87 34 59.90 52 28.06 31.84 Wate (Chea seccas cece 50 07.50 |— 2.61 |— 0.14 |4+ 0.76 50 15.51 |21 07 33.82 31. 69 epee” (eK fet A e- See 52 17.10 |— 0.91 |— 0.03 |+ 0.84 52 17.00 09 45. 22 31.78 W.| a Cephei-.-.--. -- 57 56.44 |+. 8.62 0.00 |+ 1,41 58 06. 47 15 34.59 | —42 31.88 Mean at 202'56™ Jocalistderes time sa2--5569 2 ne nee eaeeen seater =eise a= eee —42 31.801 NORMAL EQUATIONS. O=+ 3.20+7.00 dt+0.70a' + 0.236 dt = — 08.301 O=-+ 3.76-+ 0.70 dt-+146a'+ 2.40¢ a’ = — 18,342 0 = + 12.10 + 0.23 dt + 2.40 a’ + 13.30 ¢ ce =— 05,662 Adopted azimuth = — 108,00; a= — 118.342 | Clamp. 444445555 TIME DE TERMINATIONS. 15 Observations and reductions for time taken at sending station—Continred. OGDEN, UTAH, OCTOBER 2, 1873. Name of star. i Aa. Bb. Ce. Abd AR AE ham. 3 8. 8. 8. kh. m 8. hm. 8 m. 8. d Sagittarii.......|19 52 47.64 |— 1.49 |— 0.06 |— 0,10 |19 52 45.99 |19 10 14.14 | —42 31.85 6 Draconis 55 01.91 |+ 1.87 |— 0.28 |— 0.25 55 03, 25 12 31.30 31.95 7 Draconis 20 00 27.92 |+ 2.95 |— 0.32 |— 0.33 |20 00 30.22 17 58, 52 31.70 B Cygni ... 08 09.73 |— 0,42 |— 0.12 |— 0.11 08 09. 08 25 37.38 31.70 « Cygni ..- 09 02.80 |+ 0.47 |\— 0.17 — 0.15 09 02,95 26 31.13 31. 82 fe JAG Gh Gos Recetas 12 38.42 |— 1.23 |— 0.14 |-+ 0.10 12 37.15 30 05.35 31.20 y Aquilw .....-..-- 22 47.72 |— 0.84 |— 0.19 |+ 0.10 22 46.79 40 14.99 31,80 @ Aquile...---.- 27 09.66 |— 0.88 |— 0.18 |+ 9.10 27 08.70 44 36.95 31.75 @ Draconis... .--. 31 05.59 |4-- 2.27 |— 0.51 |+ 0.28 31 07.63 48 35. 82 31.81 7 Aquilae a-=-)-- 40 30.74 |— 0.94 I— 0.08 |+ 0.10 40 29, 82 57 57.97 | —42 31.85 Meanvat,19'34™ localisiderealstime:’. ssc: o San. aoteesccoee sees cose ee —42 32.13 NORMAL EQUATIONS. 0=— 1.11+4 10.00dt— 5.02a+4 2.62¢ ot =— 03,13 0O=+ 9.59— 5.02 dt + 19.56 a— 15.89 ¢ a =— 08,42 9—=— 14.76 -+ 2.62 dt — 15.89 a + 63,52 ¢ ec =+ 05.13 OGDEN, UTAH, OCTOBER 5, 1873. I Name of star. A Aa. Bb. Ce. 206 AR. AT. 5 * hem. 8. 3. ay CB ER an NV CRMC Ss Mrs 48: Wilt (Draconis! sos-c--- 20 00 31.69 |4+ 0.06 |— 0.26 |— 0.43 |20 00 31.06 |19 17 58.28 | —42 32.78 Nyt @yonry-esses eo. 08 10.00 |— 0.01 |— 0.07 |— 0.14 08 09.78 25 37.32 32. 46 WWel|cn (Cy oni ae ee) oo, 09 03.98 |+ v.01 |— 0.09 |— 0.20 09 03.70 26 31.01 32. 69 Wales Agmilss cc a5) 55. 12 38.16 |— 0.03 |— 0.03 - 0.13 NPY Sve 30 05. 30 32. 67 Waly: Aguile. -25--<: 22 47.71 |— 0.02 |— 0.04 |— 0.13 22 47.52 40 14.94 32.58 Bala Aquils.22--5 ---- 27 09.63 |— 0.02 |-- 0.12 |+- 0.12 27 09.61 44 36.69 32.72 Beiive: Draconisie-c-i---- 31 08.54 + 0.05 |— 0.36 |+ 0.37 31 08. 60 48 35. 62 32. 98 Pile Cyenie se cenence 34 54.51 |+ 0.01 |— 0.20 |+ 0.20 34 54,52 52 21.75 SVS Bail Aquilsee=s--5 --- 40 30.52 |— 0.02 |4+ 0.12 |+ 0.13 40 30.51 57 57.92 32.59 HNO Aguila a en <= 47 19.74 |— 0.02 |— 0.10 |-+ 0.12 47 19.74 |20 04 47.02 32. 72 E. | a? Capricorni .----- 53 35.29 |— 0.03 |— 0.08 |+ 0.13 Gp) sb a 11 02.52 32.79 Healer: | Cephei 222-22 =. - 5 55 39.55 | 0.09 |-- 0,52 I+ 0.57 55 39.69 13 07.26 | —42 32.43 Meanjannlobras yl ocalisiderealitime) -oo ce cnc 26 fo oa ie Sanne ate as cccises onc cent —42 32.68 NORMAL EQUATIONS. 0=+ 1.50 + 12.00 dt— 222a+ 4.94¢ ot = — 08.18 -0=+4117— 2.92 dt+14.69a— 8.43¢ a =— 05,04 0O=—618+4 4.94dt— .843a+4 53.84¢ a ==+ 08.13 18 ASTRONOMY Observations and reductions for time taken at sending station—Continued. OGDEN, UTAH, OCTOBER 7, 1873. = Name of star. ue Aa, Bb. Ce. ree: AR. AT: o | | hm. 8. 8. eee: 8. hm. 8. hm. 8. Te Win |kan Cetin. see oe 3 38 15.61 |+ 0.16 — 0.05 — 0.46 | 3 38 15.26 | 2 55 41.21 | —42 34.05 tWin |Poamberseil-2- 5.22 39 40.44 |+ 0.02 |— 0.08 \— 0.57 39 39.81 57 05.76 34, 05 We Bo Bersetsos2—25--- 42 32.52 |-+ 0.00 — 0.08 — 0,59 42 31.85 59 57.84 34.01 W. | 48 Cephei 47 01.57 |— 0.68 — 0.18 |— 2.04 46 58.67 | 3 04 24.56 34.11 W.| ¢ 50 13.48 |-+ 0.10 — 0.05 |— 0.48 50 13.05 07 39.06 33.99 E. | a 57 52.91 |— 0.05 — 0.31 |+ 0.68 57 53.23 15.19.31 33. 92 E. | o 4 00 35.16 |+ 0.14 |— 0.13 |+ 0.46 | 4 00 35.58 18 01.50 34. 08 E. | & 02 53.61 |+ 0.14 0.19 |-+ 0.46 02 54.02 20 19.80 34. 22 1s ae 06-28.10 |+ 0.13 — 0.21 |+ 0.46 06 28.48 23 54.51 33. 97 E. |e 09 33.01 |+ 0.20 — 0.16 |+ 0.46 09 33.51 26 59.3 34.15 I. |-6-—Bersel. sss25-=225 16 30.51 |— 0.04 — 0.40 |+ 0.66 16 30.73 33 56.63 | —42 34.10 Mean ‘ati3" 14™ localisideréaltime- . -25-05 22-2 5 - = eo eo eee ci eee eae —42 34.06 NORMAL EQUATIONS. 0=+ 1.69+11.00dt+ U.45a— 2.12¢ ot = — 05.06 0=— 7.99+ 0.45 dt+ 9.124+12.81e¢ a =-+ 03,26 =— 18.80 — 2.12 dt +12.8la+ 34.58¢_ e =-+ 05.45 OGDEN, UTAH, OCTOBER 18, 1873. E _ Name of star. T. Aa. Bb. Ce. Tvs AR. AT. 5 hens Gp 8. 3. ham. 8. hom. 8. m 8. Wi) 7 Aguile 222--=--2 20 40 32.75 |— 0.19 |+ 0.01 — 0.49 20 40 32.08 |19 57 57.87 | —42 34.21 W..| (@. “Aquilse=-=7----- 7 21.97 |— 0.23 |4- 0.01 / 0.49 47 21.26 |20 04 46.97 34. 29 W.| a? Capricorni ...--. 53 37.64 |— 0.28 |+ 0.01 — 0.50 53 36. 87 11 02.47 34. 40 W..| x. “Cephei % <= =.--2- 55 42.36 |+ 0.87 + 0.11 -— 2.23 55 41.11 13 06.94 34.17 Wa yiGyenivss.. see 21 00 16.49 |— 0.01 + 0.05 — 0.63 21 00 15.90 17 41.60 34.30 W.| «x Capricorni ..---- 02 40.30 |— 0.31 |+ 0.02 — 0.51 02 39.50 20 05.23 34, 27 W.| e Delphini...--..-. 09 45.44 |— 0.17 |+ 0.04 - 0.50 09 44.81 27 10.53 34. 28 Ww. Grazie. 13 08.05 |+ 0.57 |+ 0.14 |— 1.59 13 07.17 30 32.77 34.40 Be iia? (Cypniv es. 2 - 19 41.25 |+ 0.03 |— 0.11 + 0.69 19 41.86 37 07.57 34.29 EK. | y Delphini----.-.-.- 23 21.79 |— 0.15 |— 0.08 + 0.51 23 22.07 40 47.73 34.34 EB. | # Aquarii-......-. 28 24.37 |— 0.26 — 0.06 |+ 0.49 28 24.54 45 50. 32 34,22 E. 12-year Cat.1879-| 35 47.54 |4+ 1.23 |— 0.49 |+ 2.83 35 51.11 53 16.72 34.39 E. | 61 Cygni ....-..-.- 43 48.15 |-+ 0.02 |\— 0.15 |+ 0.62 43 48.64 (21 01 14.32 34, 32 ith |g (ON fen oe eee 50 07.68 |— 0.08 — 0.14 |+ 0.56 50 08. 02 07 33.70 34, 32 HE. | 7 Cygni ..---..... 52 18.84 |— 0.03 |— 0.15 + 0.62 52 19.28 09 45.09 34.19 E. | a Cephei-.-....-..--- 58 07.68 |+ 0.26 |— 0.28 |+ 1.04 58 07.70 15 34.33 34. 37 KB. | 8 Aquarii- ....-.---. 22 07 28.83 |— 0.25 |— 0.10 |+ 0.49 |22 07 28,97 24 54.69 34.28 E.} 6 Cephei.-.---.- --.-. 09 34.74 |+ 0.48 |— 0.38 |+ 1.42 09 36.26 27 02.28 | —42 33.98 NORMAL EQUATIONS. +18.00dt— 4.39a+ 4.79¢ dt =— 08.28 — 4.39 dt + 29.144 — 11.23¢ a= 034 — 4.79 dt—11.23a+ 94.61 o =-+08.49 pibhendddads (or | Clamp. Hobbes sagas TIME DETERMINATIONS. 19 Observations and reductions for time taken at sending station—Continued. OGDEN, UTAH, OCTOBER 9, 1873. Name of star. ah Aa. Bb. Ce. TT AR. hem 8. 8. 8. 8. (eis 1S lin tie. ES a? Capricorni .----- 20 53 38.11 |— 0.07 |— 0.07 |— 0.47 |20 53 37.50 |20 11 02.46 « Cephei..-.-...-. 55 44.18 |-+ 0.21 |— 0.41 |— 2.07 55 41.91 13 06, 84 oy CON FHOW ene Sanece 21 00 17.32 0.00 |— 0,12 |— 0.59 |21 00 16.61 17 41.59 a Capricorni .-.-.-. 02 40.84 |— 0.08 |— 0.04 |— 0.47 02 40.25 20 05. 22 e Delpbini-.....--.. 09 46.18 |— 0.04 |— 0.06 |— 0.46 09 45. 62 27 10.52 Groombr, 3241 -. 13 09.54 |--+ 0.14 |— 0.64 |— 1.47 13 07.57 30 32.70 a. (Cyent eeco-e--<- 19 42.10 0.00 |— 0.32 |-+- 0.64 19 42.42 37 07.55 yWelphiniees-o=-- 23 22.45 |— 0.04 |— 0.21 |+ 0.47 QoLeelOd 40 47.71 ja JAE = eee eeeo 28 25.08 |— 0.06 |— 0.14 |+ 0.46 28 25, 34 45 50.31 12-year Cat.1879.| 35 49.74 |+ 0.30 |— 1.03 |+ 2.63 35 51. 64 53 16,59 GIN @ypnice---co---- 43 48.98 0.00 |— 0.29 |+ 0.57 43 49.26 |21 01 14.30 (Cy enieastessi2se= 50 08.48 |— 0.02 |— 0.26 |+ 0.52 50 08.72 07 33.68 Mean\at:205)40™'locallsidereall time =.2-.-- 22-1. -<2em- <-2 eos --cebc temeeceances NORMAL EQUATIONS. 0=— 0.06 + 12.00 d1— 428a— 0.53¢ ot= 08.00 O=+ 438— 4.28 dt + 25.24a— 5.09¢ a =— 08,08 0 =— 35.26 — 0.53 dt— 5.09a+ 76.90 ¢ c =-+ 08.45 OGDEN, UTAH, OCTOBER 10, 1873. Name of star. Mb Aa. Bb. Ce. Me, AR. hem. 8. a 8. 3. hm. 8. lie til on a? Capricorni -.-.-. -|29 53 38.98 |— 0.55 |+ 0.03 |— 0.44 [20 53 38.02 |20 11 02.44 Ke Cepheter ..ecss- 55 42.13 |+ 1.70 |+ 0.18 |— 1.95 55 42. 06 13 06.72 y Cygni-.-... -/21 00 17.33 j— 0.03 |-+ 0.05 |— 0.56 /21 00 16.79 17 41.57 ma Capricorni . -| 02 41.74 |— 0.60 |-+ 0.02 |— 0.45 02 40.71 20 05. 20 e Delphini........| 09 46.60 |— 0.34 |+ 0.04 |— 0.44 09 45, 86 27 10.50 Groombr., 3241. -. 13 08.24 |4+ 1.11 |+ 0.11 |— 1.39 13 08. 07 30 32.63 a Cyrniee-eeesee 19 42,25 |-+ 0.06 |— 0.08 |+ 0.60 19 42.83 37 07.52 y Delphini .----..- 23 22.95 |— 0.30 |— 0.05 |4+ 0.44 23 23. 04 40 47.70 we Aquarii -.....-.-| 28 25.80 |— 0.52 |— 0.04 |+ 0.43 28 25. 67 45 50.30 12-year Cat. 1879.| 35 47.27 |+ 2.42 |— 0.31 |4+ 2.48 35 51.86 53 16.45 G1 @ygnil-----. ---.- 43 49,23 |+ 0.05 |— 0.10 |-+ 0,54 43 49.72 |21 01 14.28 ¢ Cygni...--..-...| 50 08.71 |— 0.15 |— 0.09 I+ 0.49 50 08. 96 07 33. 67 Meanratr cub 39™alocalisiderenltimesscsccet es: oases. css casa cos onautecscce aces NORMAL EQUATIONS. -0O=— 4.08-+ 12.00 dt— 428a— 0.536 ot = + 03.12 O=+ 19.56— 4.28 dt + 25.24a— 5.09¢ a =— 08.66 0=— 36.24— 0.53 dt— 5.09a-+ 76.90 ¢ ec =-+ 03.43 AT. m. 8. —42 35.04 30. 07 35. 02 30. 03 35. 10 34, 87 34, 87 34, 96 35. 03 35. 05 34. 96 —42 35. 04 —42 35. 00 —42 35.29 —42 35.38 ASTRONOMY. Observations and reductions for time taken at sending station—Continned. OGDEN, UTAH, OCTOBER 11, 1873. a EI Name of star. aR: Aa. Bb. Ce. Te, AR. (ND iS) h. m. 8. 8. oh 8. h. Mm. 78. hom 8. ™m.- 8. W.| y Delphini 21 23 24.59 |— 0.23 |+ 0.24 |— 0,44 [21 23 24.16 20 40 47.63 | —42 36.48 W.| uw Aquaril......... 28 27.67 |— 0.40 |+ 0.19 |— 0.43 28 27.03 45 50. 28 36.75 W. 12-year Cat. 1879- 35 52.15 |+ 1.86 |+ 1.35 |— 2.46 35 52.90 53 16. 34 36, 56 W.| 61 Cygni 43 50.88 |-+ 0.04 |+ 0.39 |— 0.54 43 50.77 21 01 14.26 36. 51 W. ) 50 10.32 |— 0,12 |+ 0.35 |— 0.49 50 10.06 07 33.65 36. 41 W. 52 21.62 |— 0.04 |4+ 0.39 |— 0.54 52 21.43 09 45. 04 36.39 rE. 58 09.00 + 0.39 |-+ v.40 |+ 0.90 58 10.69 15 34, 22 36. 47 E. 22 07 31.03 |— 0.27 |4+ 0.13 |4- 0.43 )22 07 31.22 24 54. 66 36. 56 E. 09 36.30 + 0.72 |4+ 0.50 |4 1.24 09 38. 76 27 02,11 36. 65 EK. 13 38.21 |— 0.39 |+ 0.11 |+ 0.43 13 38. 36 30 01.76 36. 60 E. 20 35.23 |\— 0.27 |+ 0.14 |+ 0.43 20 35.53 37 59.10 36. 43 E. 22 38.82 |+ 0.77 I+ 0.45 |4+ 1.28 22 41.32 40 04.85 | —42 36.47 Mean at 215 10™ local sidereal time.-.----.-.-.----.---- siete aiatsigae Seeispaeiiceslewee —42 36.52 NORMAL EQUATIONS. 0=+ 6.91 -+ 12.00 di— 3.8la— 0.4le ot = — 08.72 O=-+ 281— 3.81 dt+ 20.37 a+ 11.39¢ a =— 0851 0 = — 22,.29— 0.41 dt + 11.39 a + 65.62 ¢ c =-+ 08.42 Observations and reductions for time taken at receiving station. SALT LAKE CITY, UTAH, SEPTEMBER 29, 1873. EI Name of star. Tt Aa. vB. Ce. 1: AR. AT. 5 Mais Ss 2. 3. 8. hm. 8. (ip tite, BGs hm 8. Ibn |) (ONSEN co-cc5se 12 45 32.01 0.00 |-++ 0.12 |4+ 0.24 |12 45 32.37 )20 52 28.10 |4 8 06 55.73 E. | 61 Cygni(pr.)..--| 54 18.58 |— 0.16 |4 0.14 |4 0.23 | 54 18.79 [21 01 14.48 55. 69 E. | 61 Cygni (seq.)-.-| 54 20.01 |— 0.16 |+ 0.14 |4 0.23] 54 20.22] 01 16.00 55.78 Db |e (C\yfeiml CoS Roa 13 00 38.50 |— 0.60 |+ 0.15 |+ 0.21 |13 00 38.26 07 33.85 55.109 E. | a@ Cephei ...... = 08 36.15 |+ 2.11 J+ 0.30 |+ 0.38 08 38. 94 15 34.65 5d. 72 W.| 6 Aquarii-...... 18 01.14 |— 2.00 |+ 0.09 |— 0.18 17 59. 05 24 54.79 55.74 W.| € Aquarii-...-... 24 08.41 |— 2.11 |+ 0.09 |— 0.18 24 06.21 30 01.88 55. 67 W.|e Pegasi.....-.- 31 05.03 |— 1.45 |4+ 0.11 |— 0.18 31 03.51 37 59. 24 55. 73 W.| « Capricorni-...-. 39 31.55 |— 2.33 |+ 0.07 |— 0.19 39 29.10 46 24.90 55. 80 W. | 79 Draconis. -.--. 44 19.06 |+ 5.04 |+ 0.44 |— 0.61 44 23.93 51 19.58 55. 65 W.} a Aquarii..-..-.. 52 24.23 |— 1.84 |+ 0.11 |— 0.18 52 22.32 59 18.12 |+ 8 06 55.80 Mean at 215 30™ local sidereal time........--.---.------------ -------- ------| 8 06 55. 718 NORMAL EQUATIONS. 11.00 db¢ 4+ 128a— 1.5c=>— 6.53 a =— 28.743 1.28 db¢-+6.60a+ 1.39¢—=—18.20 ec =-+ 05.180 — 1.35 dt+ 1.389 a+ 27.56ce=-+4 1.51 ot = — 08.281 TIME DETERMINATIONS. 21 Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, OCTOBER 1, 1872. 2 Name of star. Ws Aa. Bb. Ce. T’. AR. AT. 3 hom 8. 8. 8. 8. h. m. 3. hm. 8. hem 8. E. |e Aquile....... 10 46 57.92 |— 1.22 0.00 |+ 0.15 |10 46 56.85 |18 53 52.88 |+ 8 06 56.03 BE. | ¢ Aquilx...-..- 52 40.95 |— 1.27 0.00 |+ 0.14 52 39. 82 59 35.75 55. 93 KB. | « Sagittarii....- 55 21.04 |— 2.57 |+ 0.01 |4 0.15 55 18.63 |19 02 14.55 55. 92 E.| 6 Draconis ~ .--./11 05 31.81 |+ 3.16 |+ 0,07 |+ 0.37 |11 05 35, 41 12 31.37 55. 96 Bia 6) Aquilsely. 2522. 12 12,92 |— 1.67 |+ 0.03 |+ 0.14 12 11.42 19 07.35 55. 93 1. | @ VWulpecule .-.. 16 31.28 |— 0.84 |-+ 0.04 |4+ 0.15 16 30. 65 23 26.70 56. 07 W.| # Aquile -....-.. 20 00.38 |}— 1.51 |+ 0.06 |— 0.14 19 58.79 7 64.78 55. 99 W.| « Aquilxe....... 23 11.57 |— 2.03 |-+ 0.05 |— 0.14 23 09. 45 30 05. 37 55. 92 WiltG Cyoni asec -- 26 06.64 |+ 0.68 |+ 0.11 |— 0.22 26 07.21 33 03, 17 55. 96 Wajiys Aquilseae--=- 33 20.49 |— 1.40 + 0.05 |— 0.14 33 19. 00 40 15.00 56. 00 W.| a Aquile -....-.. 37 42.54 |— 1.46 | 0.04 |— 0.14 37 40. 98 44 36.97 55. 99 W. |e Draconis.-.... 41 36.36 |+ 3.83 [+ 0.13 |— 0.41 41 39.91 48 35.88 |-+ 5 06 55.97 Mean/at 19" 00™ local sidereall time - .-.- 2 -- 2-22 --- 2.2. 2222 ---- ---- +--+ -ce-|- 8 06 55.973 NORMAL EQUATIONS. 12.00 d¢ 4+ 2.838 a— 0.67¢=-+ 5.28 a =— 2.70 2.33 dt + 6.6844 2.01¢—=—15.54 ¢ =-+08.140 — 0.67 dt + 2.01 a + 27.33e=— 2.23 dt = + 08.95 SALT LAKE CITY, UTAH, OCTOBER 1, 1873. a =| Name of star. Ts Aa. BD. Ce ae, AR. AT. 5 hom: 8. 8. 8. Ce We its Ee SW i ee hom. 8 W.| @ Cygni -.---.--/12 30 11.59 |+ 0.25 |+ 0.07 |— 0.15 [12 30 11.76 |20 37 07.74 |4+ 8 06 55.98 W./e Aquarii.-.....| 33 56.62 |— 2.21 |+ 0.03 |— 0.11 33 54.33 40 50, 25 55, 92 W..||2 Aquarit--2-—.- 38 56.75 |— 2.18 |+ 0.03 |— 0.11 38 54. 49 45 50, 42 55. 93 Wealve Cypnics2--5- 45 32.06 |— 0.00 |+ 0.04 |— 0,14 45 31.96 52 28. 06 56. 10 E. | @ Cephei.-.-.----- 13 08 36.04 |+ 2.16 |+ 0.08 |+ 0.23 |13 08 38.51 21 15 34.57 56. 06 E. | 8 Cephei........| 20 02.33 |+- 4.00 |4 0.07 |4+ 0.31 | 2006.71] 927 02.62 55. 91 BH. | & Aquarii......- 24 07.93 |— 2.16 |+ 0.01 |4+ 0.11 24 05. 89 31 01.86 55. 97 E. | e Pegasi ...--. -- 31 04,43 |— 1.48 0.00 |+ 0.11 31 03.06 37 69,22 |-+ 8 06 56.16 Meanint/21 000 local sidereal times... 2. 2.c2 26 sacs 4ecncscs cececcicdcecewostes + 8 06 56.004 NORMAL EQUATIONS. 8.00 dé-+ 0.58 a+ 2.33 c—=— 1.34 a =— 2.80 0.58 d§-+- 4.74 a— 5.96 c=—13.91 e =-+ 08.107 2.33 dt — 5.96 a-+- 20.94 c—-+ 18.96 dt=-+ 05,003 22 ASTRONOMY. Obcervations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, OCTOBER 2, 1873. a eI Name of star. zs Aa. Bb. Ce. ie AR. AQ ‘S) hem 8. & 8. SS Wis te GR Ds as SB han. 8 W.| 6 Draconis..-- -- 11 05 32.44 |+ 3.33 |+ 0.18 |— 0.35 |11 05 35.60 |19 12 31.31 |+ 8 06 55.71 W.| ¢6 Aquile -.----.-- 12 13.46 |— 1.77 |+ 0.06 |— 0.13 12 11. 62 19 07.33 55. 71 W.| @ Vulpecule..-. 16 31.98 |— 0.88 |+ 0.08 |— 0.15 16 31.03 23 26. 67 55. 64 W.| w Aquile ..-.... 21 00.72 |— 1.60 |4+ 0,08 |— 0.14 20 59. 06 27 54.76 55. 70 W.| « Aquile..---- 23 11.95 |— 2,14 |+ 0.06 |— 0.14 23 09.73 30 05. 35 55. 60 Wise) (Cygnus 2-2 -= 26 06.72 |4+ 0.71 |+ 0.14 |— 0.21 26 07,36 33 03,14 55.78 E. | y Aquilx .....- 33 20.44 |— 1.48 |4+ 0.08 |+ 0.14 33 19.18 40 14.99 55. 81 E. | a@ Aquile .-.-:.- 37 42:59 |— 1.54 |+ 0.07 |4+ 0.14 37 41.26 44 36,94 55. 68 E. | e Draconis.-..-- 41 35.55 |+ 4.05 |+ 0.18 |+ 0.39 41 40.17 48 35, 82 55. 65 E.|-7 Aquile....--.| 51 03.61 |— 1.60 |+ 0.05 |4 0.15 51 02.21 57 57.97 55. 76 E.|@ Aquile.......| 57 53.11 |— 1.91 |4 0.04 |4 0.13 57 51.37 [20 04 47.04 |4+ 8 06 55.66 Mean atii195'30™ localisidereallitimey.=-— 212-2 ano aoe een aioe ice == alee + 8 06 55.70 NORMAL EQUATIONS. 11.00 dt + 1.69 a— 123ce—=— 828 a@ =— 28.854 1.69 dt + 6.12 a— 0.63 c= — 18.06 e =+ 08.134 — 1.23 dt — 0.63 a + 26.26e=-+ 5.68 ot =— 08.31 SALT LAKE CITY, UTAH, OCTOBER 2, 1873. a 2 Name of star. Lie Aa. Bb. Ce. Ee: AR. ING. 5 hm. 8. 8. 8. 8. [Oris OS Tas oS heim. 15: E. | 61 Cygni (pr.) .-.|12 54 18.50 |— 0.17 |+ 0.06 |+ 0.27 |12 54 18.66 21 01 14.43 |+ 8 06 55.77 E. | 61 Cygni (seg.)---} 54 19.87 |— 0.17 |+ 0.06 |+ 0.27 54 20, 03 O01 15.95 55. 92 ea Cyont easee=— 13 00 38.54 |— 0,62 |+ 0.05 |4+ 0.24 |13 00 28,21 07 33.80 55. 59 E.| a Cephei .------| 08 36.26 |4+ 2.16 |+ 0.08 |4+ 0.45 08 38.95 15 34.55 55. 60 BE. | 6 Aquarir.-.--- 18 00.97 |— 2.05 |+ 0.03 |+ 0.21 17 59.16 24 54.76 55. 60 W.| & Aquarii-..--- 24 08,51 |— 2.16 |+ 0.06 |— 0.21 24 06. 20 31 01.85 55. 65 W.| e Pegasi....-.. -- 31 05.08 |— 1.49 |-+ 0,07 |— 0.21 31 03. 45 37 59,21 55.76 W.| » Capricorni.. -- 39 31.75 |— 2.39 |+ 0.05 |— 0.22 39 29.19 46 24. 87 55, 68 W.| 79 Draconis..-.- -- 44 19,06 |+ 5.17 |+ 0.23 |— 0.71 44 23.75 51 19, 42 55. 67 W.|a@ Aquarii----.-- 52 24.42 |— 1.88 |+ 0.06 |— 0,21 52 22.39 59 18.10 |+ 8 06 55.71 Meaniat)214)30™)locallsidereall time) 2 -- nae) seen ee eerie eee eaten eee eee + 8 06 55. 695 NORMAL EQUATIONS. 10.00 d¢+1.28 a— 0.65 e=— 6.77 a =— 25.805 1.28 d¢-+ 6.60 a+ 2.89 e=— 18.31 — 0.65 dt-+ 2.89 a 4-25.90 ce=— 2.47 ¢ =+.08.210 dt = — 08,303 TIME DETERMINATIONS. 23 Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, OCTOBER 3, 1873. | Clamp. Pebhhedaas Name of star. Sagittarii Draconis.--.-- Aquila Vulpecule .... Aquila MAN DAR RSH Name of star. e Pegasi yw Capricorni ---. 79 Draconis a@ Aquarii @ Aquarii a Aquarii n Aquarii ¢ Pegasi T Aa. Bb. Ce. ees AR. AT. Tis Ms) 8 8. EL 8. he my 8: lin pa ES hem. 8. 10 55 22.10 |— 2.60 |-+ 0.06 |— 0.18 |10 55 19.38 |19 02 14.51 |+ 8 G6 55.18 11 05 33.16 |+ 3.21 |-+ 0.23 |— 0.44 05 36.16 12 31.25 55, 09 12 14.00 |— 1.70 |+ 0,08 |— 0.17 1p) Pe Pal 19 07.31 55. 10 16 32.45 |— 0.85 |-+ 0.09 |— 0.19 16 31.50 23 26. 66 55. 16 21 00.97 |— 1.53 |+ 0.06 |+ 0.17 20 59, 67 re tate re 55, 07 23 12.04 |— 2.06 |+ 0.05 |-+ 0.17 23 10.20 30 05. 33 55.13 26 06.84 |+ 0.69 |+ 0.11 |+ 0.26 26 07.90 33 03.04 55. 14 33 21.03 |— 1.42 |-+ 0,05 |+ 0.17 33 19.83 40 14.97 55.14 37 43.10 |— 1.48 -|-+- 0.05 |+ 0.17 37 41.84 44 36.92 55. 08 41 36.13 /-+- 3.89 |+ 0.13 |4 0.50 41 40.65 48 35.75 |-+ 8 06 55.10 Meanrat 19530 ™ localisidereall time) -2----.4----- s--- ---- ee enee eb ese els ea ncne =e + 8 06 55.112 NORMAL EQUATIONS. 10.00 d¢-+1.4la+ 2.74 c=— 12.25 a =— 2.736 1.41 d¢t-+6.26a— 1.06 c=—18.57 c =-+ 08.170 2.74 dt —1.06 a+ 25.19¢=-+ 4.73 ot = — 05.888 SALT LAKE CITY, UTAH, OCTOBER 3, 1873. acs Aa. Bb. Ce. aR AR. AT. lis ys Os 8. a 8. lie Vite Gh his mn 4 #8 Rane 8: 13 31 05.29 |— 1.46 |+ 0.02 |+ 0.17 18 31 04.02 |2L 37 59.19 |+ 8 06 55.17 39 31.87 |— 2.35 |+ 0.04 |4 0.18 39 29.74 46 24.86 55. 12 44 18.22 |+ 5.08 |+ 0.29 |4 0.58 44 24.17 51 19.37 55. 20 52 24.54 |— 1.85 |4+ 0.08 |+ 0.17 52 22.94 59 18.09 55, 15 14 03 17.48 |— 2.13 |+ 0.06 |— 0.17 |14 03 15.24 |22 10 10. 47 55. 23 11 56.59 |— 1.77 |+ 0.06 |— 0.17 11 54.71 18 49.96 5d. 25 21 59.11 |— 1.85 |4+ 0.05 |— 0.17 21 57.14 28 52.34 55. 20 28 16.53 |— 1.44 |-+ 0.06 |— 0.17 28 14.98 35 10.12 55.14 38 14.83 |-+ 2.79 |+ 0.15 |— 0.41 38 17.36 45 12.47 |+ 8 06 55.11 « Cephei Mean at 225 00™ local sidereal time 9 1. 0. 0 80 dt + 0 NORMAL EQUATIONS. 00 dt +1.80a+ 0.01c=— 3.41 7.58a— 4.37 e=—21.31 1 6t — 4.37 a + 24.57 c= + 16.23 a@ =—2.755 ¢ =-+ 08.170 dt = -L 08.172 + 8 06 55.173 24 ASTRONOMY. Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, OCTOBER 4, 1873. = =| Name of star. i Aa. Bb. Ce. a AR. AT. S) | hom. 8. 8. 8. 8. him. 6. Th. 18> hm 8. W.| 6 Draconis.-..--. 11 05 33.29 |4+ 3.31 |+ 0.19 |— 0.54 |11 05 36.25 |19 12 31.19 |+ 8 06 54.94 W.| 6 Aguile ...-... 12 14.31 |— 1.75 |+ 0.06 |— 0.21 12 12.41 19 07.30 54. 89 W.|a@ Vulpecule....| 16 32.71 |— 9.88 |+ 0.06 |— 0.23 16 31.638 23 26. 64 54, 96 W.| » Aquile ----.--} 21 01.58 |— 1.58 |+ 0.07 |— 0.21 20 59. 86 27 54.73 54. 87 W..| x) Agnilss -<==- <2 3 12.78 |— 2.12 |+ 0.06 |— 0.21 23 10.51 30 05, 32 54. 81 We 6) Cygnr 2-222: 26 07.64 [+ 0.71 |4+ 0.14 / 0.3% 26 08.17 33. 03. 02 54. 84 W.| y Aquile -...-.--| 33 21.59 |— 1.47 |4- 0.08 |— 0.21 33 19.99 40 14.96 54. 97 Weta Aquilse = 2. 37 43.65 |— 1.53 |+ 0.07 |— 0.21 37 41.98 44 36.91 54.95 Wile Draconise=-- =- 41 37.07 |+ 4.02 |4+ 0,20 |— 0.60 41 40.69 48 35.69 55. 00 Bop Cyent snes -- 12 45 32.90 | 0.00 |+ 0.10 |+ 0,27 |12 45 33.27 |20 52 27.99 54.72 E. | 61 Cygni (pr.)-.-| 54 19.20 7— 0.17 |+ 0.10 |+ 0.26 34 19,39 |21 01 14.40 55. 01 E. | 61 Cygni (seg.) --| 54 20.72 |— 0.17 |+ 0.10 |4 0.26 54 20.91 01 15. 92 55. OL 15s game Ch any Seer. 13 00 39.27 |— 0.62 |+ 0.10 |4 0.24 |13 00 38.99 YASBEril 54.78 E. | a Cephei.------- 08 57.08 |-+ 2.18 |+ 0.18 |4 0,44 08 39.88 15 34.48 54. 60 E.| 6 Aquarii-.-..-.)| 18 01.65 |— 2.07 |4 0.05 |+ 0.21 18 59. 87 24 54.73 54. 86 E. | € Aquarii-.--.-.| 24 08.94 |— 2.18 |4+ 0.10 |-} 0.21 24 07.07 31 01.83 54.76 if. |e) Pevasi 222----- 31 05.55 |— 1.50 |4+ 0.13 [4 0.21 31 04,39 37 59.18 |-+ 8 06 54.79 Meaniat20200™ localisiderealstime =.se2 sees ae a= eee + 8 06 54. 866 NORMAL EQUATIONS. 17.00 d¢ + 2.06a— 3.04ce=— 8.72 a@ =— 2.5829 2.06 d¢ +7.40a+ 5.05e=— 20.16 ec =-+ 0.5205 3.04 d¢-+ 5.05 a + 37.97¢=— 6.91 ot = — 0.2137 SALT LAKE CITY, UTAH, OCTOBER 5, 1873. a a | & | Name of star, T. Aa. | Bo | Ce T. AR | | at 3 | hm 8. 8. 8. 8. hom 8s. jh m 8. hm. 8. E.| a Vulpecule ....|11 16 32.59 |— 0.83 |+ 0.12 |+ 0.16 |11 16 32.04 |19 23 26.61 |+ 8 06 54,57 E.| 2 Aguile .......}| 21 01.66 |— 1.50 |+ 0.10 |+ 0.15 21 00.41 27 54.71 54. 30 E.| « Aquila .......) 23 12.59 |— 2.01 + 0.08 |+ 0.15 23 10.81 30 05.30 54. 49 Be | @yeniee- = 26 07.36 |+ 0.67 + 0.17 |+ 0,23 26 08. 43 33 03. 03 54. 60 E. | y Aquile -......) 33 21.53 |— 1.39 + 0.09 |+ 0.15 33 20.38 40 14.94 54. 56 W.| a Aguile ...-...} 37 43.83 |— 1.45 + 0.10 |— 0.15 37 42.33 44 36.89 54. 56 Ware. Draconisis-—.-- 41 37.45 | 3.81 |+ 0.31 |— 0.44 41 41,13 48 35. 62 54, 49 W.| 7 Aguile ----..-} 51 04.89 |— 1.50 |-+ 0.11 |— 0.15 51 03.35 57 57.92 54, 57 W.| @ Aquile -..---- 57 54.34 |—~ 1.20 + 0.10 |— 0,15 57 52. 49 04 46. 97 54, 48 W.| a Capricorni ..../12 04 10.23 |— 2.22 + 0.09 |— 0.15 |12 04 07.95 20 11 02.52 54.57 W.| 8 Capricorni....| 07 02.47 |— 2.30 |4- 0.10 |— 0.15 07 00.12 13 54.62 |+ 8 06 54,50 Mean at 192 30™ local sidereal time NORMAL EQUATIONS. 11.00 di + 3.93 a— 2.32 e—=—16.18 3.93 dt +5.8La+ 2.43 e¢=— 17.09 — 2.32 dt + 2.43 a + 20.40e=— 2.38 a@ =— 2.568 ec =-+ 0.5149 dt = — 0.8482 + 8 06 74.517 TIME DETERMINATIONS. 25 Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, OCTOBER 5, 1873. S = | Name of star. an Aa. Bb. Ce. Dy. ’ AR. AT. 5 | hm. 8. £5 el eae s. |ho m 8s. |hom 8. hm 8. Vivter| Oe On an Sas aeee 12 45 33.40 |— 0.00 |+ 0.26 |— 0.27] 0 0 33.39 |20 52 27.97 |+ 8 06 54.58 Lifer ee MEN at Sees me 48 37.35 |-+ 0.44 |+ 0.29 |— 0.30 37.78 55 31.99 54,21 W.| 61 Cygni(pr.).-.| 54 19.97 |— 0.16 |-+ 0.25 |— 0.26 19.80 |21 01 14.38 54. 58 W.| 61 Cygni (seq.)...| 54 21.27 |— 0.16 |+ 0.25 |— 0.26 21.10] 01 15.90 54. 80 Bebe ‘Cyenigeeeee--- 13 00 39.47 |— 0.60 jr 0.27 |+ 0.24 39, 38 17 33.75 54, 37 enka) Cepheit=s--2 08 36.84 |-+ 2.10 |+ 0.48 |4+ 0.44 39. 86 15 34. 44 54.58 ise)" A QUaTI an s/.-% 18 01.77 |— 1.99 |+ 0.18 |+ 0.21 00. 17 24 54.72 54,55 He | & Aquarii:.....- 24 08.95 |— 2.10 |+ 0.19 |4+ 0,21 07. 25 31 01.82 |+ 8 06 54.57 Mean at 135 00™ local sidereal time -.-.-.. .----=<----. .ccees cose weoecesssces + 8 06 54.531 NORMAL EQUATIONS. 8.00 dt + 0.91a— 0.02 e=— 6.22 ot = — 0.8469 0.91 d¢t++1.78a+ 0.22 c= —5.26 a =— 2.8726 — 0.02 dt + 0.22 a + 15.04 c= + 2.49 co = + 0.5205 DETROIT, MICHIGAN, SEPTEMBER 29, 1873. s : s EI Name of star. an. Aa. Bb. Ce. Te AR. OES 5 ah ES 8. 8. Re leeticn Ch hams . 8: m. & Wider Cetin. eae. sc 0 29 13.08 |+ 0,01 |+ 0.33 |-+ 0.26 | 0 29 13.68 | 0 23 36.24 | — 5 37.44 W.| a Cassiopeia... ..-- 38 58,09 |— 0.01 |+ 0.85 |+ 0,45 38 59.38 33 21.99 37.39 Weiler Cetiess2- =.= = 42 52.69 |+ 0.02 |4+ 0.25 |4+ 0.27 42 53.23 37 15.74 37.49 Wale. Piscitumecee- ese 1 02 00.79 |+ 0.01 |+ 0,40 |+ 0,26 | 1 02 01.46 56 23.93 37,53 Birth OL Webi pene. oat cae 23 20.49 |-+ 0.0L |4+ 0.34 |— 0,26 23 20.58 | 1 17 43.31 37.27 Boi Pisetum: .c-: ---- 30 21.37 |+ 0.01 |+ 0.48 |— 0.27 30 21,59 24 44.04 37,55 Hajivo Piscummysee: oo - 44 21.43 |+ 0,01 |+ 0.44 |\— 0.26 44 21.62 38 44.10 | — 5 37.52 Meantatel® 60™ local'stdereall times... 525+ coon c-actscce do. ncacccs ace sccn-cne — 5 37.46 NORMAL EQUATIONS. 0 =— 0.12 + 7.00 dt-++3.64a—1.77¢ dt =— 08.06 0 = + 0.24-+ 3.64 dt + 3.04.a-+ 0.296 a =- 05.02 0=+4231—1.77 6t-+0.29a+9.45¢ ¢ =— 08.26 ASTRONOMY. Observations and reductions for time taken at receiving station—Continued. DETROIT, MICHIGAN, SEPTEMBER 30, 1873. Ss & Name of star. Ts Aa. Bb. Ce: te AR. ZNEE: is} hem, 8 8. a & hm. 8 Ram. | 18: Mm. 8. W.|e Delphini--....-/20 32 48.36 |+ 0.14 |+ 0.46 |+ 0.17 |20 32 49.13 [20 27 10.66 | — 5 38.47 W.| y2 ~Delphini..--... 46 25.66 |-+ 0.13 i+ 0.49 |-+ 0.17 46 26,45 40 47.84 33. 61 Wal, oeAqQuanitess-.- <= - 51 28.07 |-+ 0.22 + 0.33 + 0.17 51 23.79 45 50. 43 38. 36 W. | 32. Vulpecule - ---- 54 48,39 |-+ 0.08 |+ 0.58 |4 0.19 54 49.24 49 10.7% 33. 52 Wray Cyoniseeesrenaaiel wo 11.44 |+ 0.07 |+- 0.60 |+ 0.19 |21 13 12.30 [21 07 33.83 38. 47 K.} 1 Draconis, L. C.| 24 26.65 |+ 1.61 |— 2.21 |+ 1.18 24 27.23 18 48.93 38.30 BB Aquariiizsse--—= 30 32.76 |-+ 0.21 |+ 0.38 |— 0.17 30 33.18 24 54.78 38. 40 BS es) Aquanties-.—s-- 36 40.03 |+ 0.21 |+ 0.36 |— 0.17 36 40. 43 31 01. 87 38. 56 H. |e Pegasi --- a 43 37.29 |+ 0.15 |-+ 0.48 |— 0.17 43 37.75 37 59. 23 38. 52 E.| gu Capricorni--...| 52 02.86 |4+ 0.23 |+ 0,32 |— 0.17 52 03.24 46 24.89 38. 35 E.|@ Pegasi.-.-------|22 09 28.01 |+- 0.17 |4 0.45 |— 0.17 |22 09 28.46 )22 03 50.05 38. 41 Bey 0) eA qt aniiese se 15 48.60 |+ 0.22 |4- 0.35 |— 0.17 15 49.00 10 10.5 38. 50 BK. | y -Aquarii.....--. 20 46.33 |-+ 0.19 |+ 0.39 |— 0.16 20 46.75 15 08.30 38. 45 16 ge JAG EG See cone 24 27.99 |+ 0.18 |+ 0.40 |— 0.17 24 28. 40 18 49. 98 38. 42 E. | 226 Cephei.--.------ 35 42.97 |— 0.60 |+ 1.78 |— 0.67 35 43. 48 30 05. 36 38. 12 Hm: )¢ Pegasi--..----. 40 48,34 |+ 0.15 |+ 0.46 |— 0.17 40 48.78 35 10.14 38. 64 Be Ay eAquarn c=. ---- 51 40.08 |+ 0.22 |+ 0.34 |— 0.17 51 40. 47 46 01.94 | — 5 38.53 Meaniat)21555™ localisidercals times cose -s ee - ae aeee ee ee — 5 38.45 NORMAL EQUATIONS. 0=— OPG4e 17.00 dt + 13.084 ++ 1.74¢ 6t = — 08.15 0 —— 17.84 ++ 13.04 dt 4- 45.45 a — 45.52 ¢ a =+ 08.27 0= + 26.32 + 174 dt 45.52 a + 82.26. c =— 05.17 DETROIT, MICHIGAN, OCTOBER 1, 1873. = i 3 Name of star. its Aa. Bb. Ce. 105 AR. AT. 5 Tice es 8. 8. Cpiiieais 6s) WWiedts Se m & E.|@ Aquilw......-.. 20 10 25.64 |-+ 0.10 |-++ 0.23 |— 0.27 )20 10 25.70 |20 04 47.06 | — 5 38.64 EB. | a? Capricorni --- -- 16 41.15 |+ 0.12 |-+ 0.20 |— 0.28 16 41.19 11 02.58 38. 61 E. | « Capricorni..---| 25 43.90 |+ 0.13 |4+ 0.19 |— 0.29 25 43.93 20 05. 34 38. 59 Be fen Welpbhinig -==—-= 32 49.39 |--+ 0.07 |+ 0.35 |— 0.28 32 49.53 27 10.64 38. 89 E. | 72 Delphini - .----- 46 26.69 |-+ 0.07 |+ 0.40 |— 0.29 46 26, 87 40 47.81 39. 06 1p 72. AACE aoe Soe 51 29.05 |-+ 0.11 |+ 0.29 |— 0.28 51 29.17 45 50. 42 38.75 E. | 32 Vulpecule --.-.. 54 49,67 |-+ 0.04 |+ 0.51 |— 0.31 54 49. 91 49 10.71 39. 20 WS Capnile-sseasnes 21 13 12.75 |+ 0.03 |-+ 0.61 |— 0.32 |21 13 13.07 |21 07 33.82 39525 Wisi plume e Pasi eee nee Q1 53.05 |-+ 0.06 |+ 0.51 |+ 0.29 Di Sank 16 14. 96 38. 95 Wee. Aquanil==-- 22-5 30 32.93 |+ 0.11 |+ 0.35 |4+ 0.27 30 33. 66 24 54.77 38. 89 Wa) cae Aquaniten. see. 36 39.98 |-+ 0.11 |+ 0.33 |+ 0.28 36 40.70 31 01.86 38. 84 Wiel|ve, Veerasi = -2e- = 43 37.20 |+ 0.08 |+ 0.44 |4 0.28 42 38.00 37 59. 22 38. 73 W.| #2 Capricorni - 52°03. 11 |+ 0.12 |+ 0.30 |+ 0.28 52 03.81 46 24,83 38. 93 W.| 20 Pegasi ---.----. -|22 00 34.75 + 0.07 |-+ 0.45 |-+ 0.28 }22 00 35.55 54 56.49 39. 06 Walia Aquanit@=-----. 05 56.26 |-+ 0.09 |+ 0.37 |+ 0.27 05 56. 99 59 18.10 38. 89 Wiel Geer as ten eee 09 28.27 |+ 0.09 |+ 0.41 |4+ 0.28 09 29.05 |22 03 50.05 39. 00 W:|@ Aquarii----.--. 15 48.61 |-+ 0.11 |4+ 0.32 |+ 0.28 15 49.32 10 10.49 38. 83 W.!/ y Aquarii Beraceee £0 46.54 |+ 0.10 |+ 0.36 |+ 0.27 20 47.27 15 08,29 38.98 W.| « Aquarii -..--..-. 24 28.16 [+ 0.09 |+ 0.37 |+ 0.28 24 28.90 18 49. 97 38. 93 W. | 226 Cephei...---. -- 35, 41.58 — 0.31 |+ 1.68 |4+ 1.10| 35 44.05]. 30 05.32 38.73 Ww. c Popasi sos 200), 40 48.38 |+ 0.08 |+ 0.44 |4+ 0.28] 4049.18] 35 10,13 39. 05 W. Powasi enemas 46 05,57 |-+ 0.10 |+ 0.53 |4+ 0.30 46 06.50 40 27.31 39.19 W. A Aquarii baie aes 51 40.12 |4+ 0.11 |+ 0.34 |+ 0,28 51 40.85 46 01.94 38. 91 W.| a= Pegasi ---------|23 04 06.76 |+ 0.07 |+ 0.49 {+ 0.28 |23 04 07.60 58 28.67 | — 5 38.93 Mean at 212'55™ local sidereal time’. . --o-se --2eelee eee ee eenienee =~) === — 5 38.91 NORMAL EQUATIONS. 0= +2.73 + 24.00 dt + 12.42 a — 10.95 ¢ sd =— 033 0 = + 2.80 + 12.42 dt 1.79 a+ 3.630 a =+0514 0O= + 7.24 — 10.95 dt-+ 3.65 a + 40.71 & e¢ =— 08,27 TIME DETERMINATIONS. Observations and reductions for time taken at receiving station—Continued. DETROIT, MICHIGAN, OCTOBER 9, 1873. Fi eI Name of star. Aa. Bb. Ce. BUS AR. AT. 5 3 Ch cE 8. hm 8 hum. 8. it: .8s KE. | a Capricorni .----. ; 0.20 |— 0.03 |K 0.32 20 16 20.33 |20 10 38.60 | — 5 41.73 Beye) Delphini-s =: =..-- 2) 0.12 |-+ 0.03 |— 0.31 a GpeiaR 27 10.52 42. 01 By |i (Chie eesecsosse 50. < 0.01 |-+ 0.06 |— 0.44 42 49.91 37 07.55 42. 36 E. | # Agquarii 32. ¢ 0.19 |+ 0.03 |— 0.32 51 32 28 45 50.31 41.97 E. |» Cygni . f 0.01 |-+ 0.09 |— 0,41 58 10.31 52 27.89 42. 42 E. | 61 Cygni . ib 0.02 |+ 0.10 |— 0.39 /2L 06 56.65 )21 OL 14.3 42.35 W.| € Aquarii Bh 0.19 — 0.02 |+ 0.31 36 43. 92 31 01.78 42.14 Win! |peniner asian. heser L ar 0.13 |— 0.03 |+ 0.32 43 41.32 37 59.13 42.19 W.| # Capricorni ...-.. b 0.21 |— 0.02 |-+ 0.32 52 07.00 46 24.80 42.20 “‘W.| a -Aquarii.--..---- . 83 |+ 0.16 |\— 0.01 |+ 0.31 |22 05 00, 29 59 18.03 42, 26 Wal Om Agaaniie == os oe .03 + 0.19 |— 0.01 |+ 0.32 15 52.53 |22 10 10. 42 42,11 Wirt lye AQ mantles ce 20 50.01 | 0.17 |\— 0.00 |4+ 0.31 20 50. 49 15 08. 24 42.25 W.| z Aquaril -..----. 24 31.63 [- 0.16 |+ 0.01 |+ 0.31 24 32.11 18 49. 91 42. 20 We 77, ‘Aquamiis--- <2. 34 33.84 + 0.16 |-+ 0.01 |4+ 0.31 34 34,32 28 52.30 42. 02 W. | 226 Cephei....-..--- 35 46.14 |— 0.53 |+ 0.03 + 1.24] 35 46.93 | 30 04.93 42. 00 VWie|| dhe 1etefarnereSecadiecee 46 09.11 |+ 0.16 + 0.04 |+ 0.33 46 09. 64 40 27.26 42. 38 Weil eApeAqQuanits ce=r- 51 43.60 |+ 0.19 + 0.03 + 0.32 51 44.14 46 01,90 42,24 W.| a Pogasi .-...-:--- 23 04 10.38 + 0.12 + 0.05 |+ 0.32 |23 04 10.87 58 28. 64 42.23 Weoi@ Piseram\ 2.22... =. 28 15.96 + 0.14 4 0, 05 ae 0.31 28 16.46 |23 22 34.17 42,29 Wiete BIsGiOM ss.) <=. 39 09.62 + 0.15 |+ 0.06 |4+ 0.31 39 10,14 33 27.85 42. 29 Wilcch SPiserum: .<222. <5 58 31.89 + 0.14 |4+ 0.07 |+ 0.31 58 32.41 52 50. 16 42.25 W.| a Andromede. ---. 0 07 34.16 [+ 0.06 |-+ 0.11 |4+ 0.35 | 0 07 34.68 | 0 OL 52.26 | — 5 42.42 Mean at 214 55™ local sidereal time...-.. -----. ------ ----- ------ ee 2228 eee eee — 5 42.20 NORMAL EQUATIONS. 0 =— 1.81 + 22.00 dt + 9.80 a — 12.540 ot = — 08.20 0=—0.87-+ 9.80 d¢+13.06a-+4+ 1.01 a a =-+ 08.24 0=+ 9.83 — 12.34 dt-+ 1.01 a4 + 40.33 a e =— 08.31 DETROIT, MICHIGAN, OCTOBER 19, 1873. a I Name of star. Ate Aa. Bb. Ce. Te AR. Aas 5 hm. 8 a: 38. 8. h. MH. 8s Asm. 8 m 8. W.| a Capricorni .- ---.|20 16 45.76 |+ 0,24 0.00 |-+ 0.18 |20 16 46.18 [20 11 02,44 | — 5 43.74 W.| x Capricorni - é 25 48.30 |-+ 0.26 |4+ v.02 |4+ 0.18 25 48.76 20 05. 20 43.56 W.| e Delphini---.----- 32 53.89 |-+ 0.15 |+ 0.07 |4 0.18 32 54, 29 27 10.50 43.79 Wie | @ CN Gi nosese nek 42 50,83 |— 0.01 |+ 0.17 |4 0.24 42 51.23 7 07.55 43. 68 W.| pz Aquarii--.----.--- 51 33.61 |+ 0.22 |+ 0.10 |4+ 0.18 51 34.11 45 50. 30 43. 81 W..| 61 Cygni --------- 06 57.66 |-+ 0.02 |4+ 0.15 |4+ 0.22 21 06 58.05 (21 01 14.28 43.77 VWelte haat. cesomedace 13 17.04 |4+ 0.07 |-+ 0.08 |+ 0.20] 1317.39) 07 33.67 43.72 E. | B Aquarii ..-.- == 30 38.26 |+ 0.21 |4 0.07 | 0.17] 3038.37 | 24 54.66 43.71 Gigs ANG eh eseses cee 36 45.41 |+ 0.22 |+ 0.07 |— 0.18 36 45, 52 3L 01.76 43.76 E.| e« Pegasi..-------- 43 42.72 |+ 0.16 |4+ 0.09 |— 0.17 43 42.80 37 59. 11 43.69 KE. | pz Capricorni 52 08.37 |+ 0.24 + 0.06 |— 0.18 52 08. 49 46 24.79 43.70 E.| a Aquarii --- 22 05 01.63 |+ 0.19 |+ 0.09 |— 0.17 [22 05 01.74 59 18. 02 43. 72 E.| 7 Aquarii-.- 34 35.86 |+ 0.19 + 0.11 |— 0.17 34 35.99 122 28 52.30 43. 69 Be lea) Aquanii)----=---- 51 45.45 |+ 0.22 |+ 0.10 |— 0.18 51 45.59 46 01.89 43.70 E.| a Pegasi.----.---- 23 04 12.33 |+ 0.14 |+ 0.16 |— 0.18 [23 04 12,45 58 28.63 | — 5 43,82 Mean at 23" 25™ local sidereal time..-----.---. ------------ -----+ 22-222 22-2 ee — 5 43.72 NORMAL EQUATIONS. 0 =— 0.64 + 15.00 dt + 8.95 a+ 0.20 ¢ ot = — 08.12 O=— 0424 895 014+ 6.55a+ 220¢ a =-+ 08.28 0=— 42424 0.20 dt +220 a+ 17.44 ¢ ec =—0817 28 ASTRONOMY. The following tables show the corrections and rates of the chronom- eters used at Salt Lake City and Ogden and of the clock used at Detroit: CHRONOMETER AT OGDEN.—NEGus, No. 1499. Local sidereal | Correction of chro- | Adopted hourly Date. time. nometer. rate. h. h. m. 8. 8. Sept. 29, 1873 -.----- 20.6 —0 42 32.18 — 0.0608 Sept. 30, 1873 ...---- 19.6 31.98 — 0.008 Oct. V1s1873-=- =e 20.1 31.79 0. 000 Oct. 20.4 31.80 0. 000 Oct. 19.9 31. 92 + 0.007 Oct. 20.4 32.12 + 0.017 Oct. 19.7 32. 68 + 0.026 Oct. 3.2 34, 06 -+ 0.020 Oct. 20.7 34. 28 + 0.022 Oct. 20.7 35. 00 + 0.023 Ocin gO Meise eences 20.7 35. 38 + 0.031 Oct MIe73i=- =e 21.2 =='0) 42: 436252 9 || p29 oo eaye ne eee CHRONOMETER AT SALT LAKE CITY.—Neaus, No. 1511. Date Local sidereal | Correction of chro- | Adopted hourly =a time. nometer. rate. h. he m 8. 8. Sept..29) 1873" <=. --- 21.5 +8 06 55.72 — 0.011 (Oya, ei ksyes soe 20.0 55. 99 0. 000 Oct. 21873 eee 20.5 55. 70 + 0.018 (Oram, Shileia} sceecee OE / 55, 14 + 0.018 Oct 41813 eee 20.0 54, 87 + 0.013 Oct Vo 18i3ieenoees 20.2 +8 06 54.52 + 0.014 CLOCK AT DETROIT.—Bonp, No. 184. Date. Popelieidenent Correction of clock.| Hourly rate. h. Roemer ae 8. Sept. 29, 1873 ...---. 0.9 —0 05 37.46 + 0.0 Sept, 30) 1873 o. secu. 21.9 + 0.0 Oita iiltvelsoscess 21.9 38. 91 + 0.022 OchesO BIO) oo sees 21.9 + 0.0 OctealOsie7B eee 23.4 —0 05 43.72 + 0.0 OBSERVATORY STATION—OGDEN, UTAH—1873~74. 29 Final results of longitude. ow o os z Mean ofsig- Sa Es Signals sent from—} Recorded’at— jnalssent and ee. BE OULEG: Soe S-5 i, 5 - received, Bonet ‘i Sich 2S/ a He |8 | g A eae les September 29, 1873: hom. 8 joseion Ee NS Gite G5 Ne tid IEE 8. 8. . Salt Lake City..-|12 31 26.13 |+ 8 06 55.71 |20 38 21.84 Senge City. } Ogden.........../21 20 29.31 |~ 0 42 32.18 [20 37 57.13 |0 00 24.71 eden ; Salt Lake City. ..|12 37 02.37 |+ 8 06 55.71 |20 43 58.08 a The ae ee Ogden .----5.-.- 21 26 05.51 |— 0 42 32.18 |20 43 33.33 24,75 |0. 04 )24. 730 October 1, 1873: . Salt Lake City. ..|12 19 58.86 |+ 8 06 55.99 |20 26 54.85 Salt Lake City 4 Opden ¢.od/ca0. 21 09 01.94 ~ 0 42 31.79 20 26 30.15 24.70 onion ; Salt Lake City. ../12 24 52.51 |+ 8 06 55.99 20 31 48.50 Soe cai ae. ae Opdenwe peeer ee 21 13 55.53 |— 0 42 31.79 [20 31 23.74 24.76 |0.06 |24.730 October 2, 1873: , § | Salt Lake City-../12 36 45.70 |+ 8 06 55.69 |20 43 41.39 Salt Lake City- 4 | Ooden.....-. ..-. 21 25 48.45 |— 0 42 31.80 20 43 16.65 24.74 Oeden Salt Lake City...|12 41 32.86 |+ 8 06 55.69 20 48 28.55 SS ail SE aa oe (QUIN. sodooresor 21 30 35.55 |— 0 42 31.80 |20 48 03.75 24.80 |0.06 |24.770 October 3, 1873: eon ets Salt Lake City.-.|13 10 42.49 |+ 8 06 55.13 [21 17 37. 62 Salt Lake City. } Osdel sete. 21 59 44.79 |— 0 42 31,93 [21 17 12.86 24.76 Oeden Salt Lake City--./13 16 13.05 |+ 8 06 55.13 [21 23 08,18 aa cee Opdengeee==sea—- 22 05 15.32 |— 0 42 31.98 |21 22 42.39 24.79 (0.03 |24. 775 October 4, 1873: . Salt Lake City. -../12 30 18,28 [+ 8 06 54.86 |20 37 13.14 ey ) Gndkat ee 1 19 20.56 |— 0 42 32.13 0 36 48.43 24.71 @eden Salt Lake City--../12 34 32.99 |+ 8 06 54.86 |20 41 27.85 8 ie oe Ordenteeesar = 1 23 35.25 ;— 0 42 32.13 20 41 03.12 24.73 |0. 02 |24. 720 October 5, 1873: Oeden ; Salt Lake City. ..|12 28 33.04 |+ 8 06 54.51 |20 35 27.55 : [i Le Opden ==2---e--1 21 17 35.50 |— 0 42 32.71 |20 35 02.79 24.76 \0.01 : Salt Lake City. -.-|12 34 03.87 |+ 8 06 54.51 |20 40 58. 38 palubake Cite -} Reteiig es eee 21 23 06.34 | 0 42 32.71 20 40 33.63 0 00 24.75 24, 755 Ogden west of Salt Lake City........---...---. 04 00™ 248,747 + 08.006 Final results of longitude—Continued. ; ee Ue Mean of sig-| »p; 2s Se Signals sent from—}| Recorded at— /nalssentand Time-correc- Corrected aE ® 3 : = tions time aoa| @ received. : : Bey 2s q So 5 $ a A a September 29, 1873: h.m. 8. fie Wide GA |e its ib Ws iE 8. 8. Tana Detroit ..-.2.--5: 23 53 22.00 |— 0 05 37.46 |23 47 44.54 "eS oy ee Ogden .-....-...|22 34 29.57 |— 0 42 32.17 [21 51 57.40 |1 55 47.14 Oeden ID Sn hesoencnass 23 58 29.01 |— 0 05 37.46 [23 52 51.55 Se eee aes Opdentee-c-sta- 22 39 36,22 |— 0 42 32.17 |21 57 04.05 47.50 |0. 36 |47. 320 September 30, 1873: Detroit Detrottiz=----4--- 0 10 42.00 |— 0 05 38.49 | 0 05 03.51 POO as Orden ss. 2).<- 22 51 48.35 |— 0 42 31.96 |22 09 16.3! 47.12 Orden Detroit SCE Cen Ros 0 15 25.54 |— 0 05 38.49 | 0 09 47.05 BeeR so Ssies= = } Opdenpeacses- == 22 56 31.56 |— 0 42 31.96 [22 13 59.60 47.45 \0.33 |47. 285 30 ASTRONOMY. Final results of longitude—Continued. al 2) ome > Mean of sig- es 3 Sais > i PC. - Signals sent from—]} Recorded at— _ |nalssent and UNE cones Ratrenter BES 2 zg e received, One. : 5 =D 2s] ¢ So Bs S a7 A = October 1, 1873: la ito, uh hm. 8. hm 8. |h.m. s. 8 8. Detroit Detroites-—- 1-5 23 51 32.00 |— 0 05 38.95 |23 45 53.05 aa Ordentee eas 22 32 37.62 |— 0 42 31.79 [21 50 05.83 [1 55 47.22 Oca Detrort esse ee 23 56 13.24 |— 0 05 38.95 [23 50 34.29 : Se eee ; Ozdenietl ee 22 37 18.52 |— 0 42 31.79 [21 54 46.73 47.56 0.34 |47.390 October 9, 1873: Ocde 0 18 39.28 |— 0 05 42.26 | 0 12 57.02 pS a ace -|22 59 44.37 |— 0 42 35.04 [22 17 09.3 47.69 Detroit 0 30 28.84 |— 0 05 42.27 | 0 24 46.57 TOM ses arcs ; Ogden ...... =... 23 11 34.23 |— 0 42 35.04 [22 48 59.19 47.38 0.31 |47.535 October 10, 1873: Detroit Detroit ..---. ...- 23 46 02.00 |— 0 05 43.75 [23 40 18.25 See aa Ogden .-..--....-|22 27 06.57 |— 0 42 35.41 |21 44 31.16 47.09 Oni Detroit .....----- 23 53 31.28 |— 0 05 43.75 [23 47 47.53 eg aE aioe OQzdene eee 22 34 35.49 |— 0 42 35. 42 [21 52 00.07 [i 55 47. 46 |0.37 |47. 275 Ogden west of Detroit, approximate result . -.-. 1 55™ 478.361 Correction for personal equation. -....-..--...-- + 08.110 Ogden west of Detroit, final result .........--.. 12 55™ 475.471 + 08.032 Observations and computations for latitude. OGDEN, UTAH. Level. Corrections. Number | Microm. . Half-sum of = Date. of star. | readings. Remarks. declination. Mi Latitude. N. | 5S sco |Level: and refr. 1873. im G4 d. d. ORs Uaerkt! ue Cp ae al! October 5. -- 7721 259.0 | 29.0} 5.3 41 22 49.4 |\— 9 36.7 —3.0 | 4113 09.7 7731 2 42.0 | 29.0] 5.3 22 54.2 |— 9 42.0 |—3.0 09. 2 7746 | 21 15.2) 0.0 | 34.6 : 7824 7 29.6 | 15.9 | 19.9 16 20.9 — 3 08.6 |--4.3 08. 0 Gr. 3779 | 20 88.8 | 15.8 | 20.2 23 23.9 |—10 10.9 |—4.4 08. 6 7843 1 22.5 | 12.3 | 23.8 7858 1 19.2 | 16.4 | 19.8 22 33.8 |\— 9 20.4 |—4.9 08.5 7880 9 86.6 | 16.3 | 19.8 18 04.9 |— 4 50.9 |—5.0 09.0 7906 | 19 23.0 | 10.9 | 25.5 7932 8 75.0 | 22.8 | 13.5 7962 901.0} 2.2] 33.7 13 22.5 |— 0 03.1 |—6.1 08. 4 7972 6 05.6 | 19.5 | 15.0 79284 | 1129.0] 9.5 | 25.9 10 28.3 |4+ 2 42.6 |-3.3 07.6 7994 4 55.0 | 13.7 | 21.3 8023 | 12 70.2 | 13.2 | 21.0 17 26.5 |— 4 13.3 |—4.2 09.0 Changed the inclination. LATITUDE DETERMINATIONS. dl Observations and computations for latitude—Continued. OGDEN, UTAH. Level. Corrections. Number | Microm. : : Half-sum of é 2 Date. of star. | readings. Remarks. declation: BP lg Latitude, IN S and refr, |42¥el- 1873. t. d. d. d. [e) ‘ a ‘ “ a“ O° fief October 5-.. 8051 | 13 62.5 | 22.0 | 12.0 8104 4 13.3 | 15.3 | 18.3 41 08 12.0 |-+ 4 54.9 |+1 9 | 41 1308.8 8118 Brsee Gh nucacs lon) 8128 | 19 63.0 | 23.5 | 10.0 14 14.1 |— 1 09.6 |+4,2 08.7 8153 0 88.0 | 13.3 | 20.2 8160 | 17 28.0 | 27.0] 6.5 O04 35.7 [4 8 29.5 [43.7 08. 9 8174 | 12 64.8 | 21.0 | 12.6 8188 6 48.7 | 18.9 | 14.6 09 53.6 |4+ 3 11.4 |43.5 08.5 Changed the 8211 5 06.3 | 20.3 | 13.2 inclination. 8231 | 13 12.0 | 21.8 | 11.8 17 14.0 |— 4 10.3 |44.7 08. 4 8248 |— 0 08.0 | 22.0 | 11.6 8273 | 17 66.4 | 16.8 | 17.2 22 16.5 |— 9 11.3 |+2.8 08. 0 8282 | 16 59.6 | 12.0 | 22.0 8324 117.0 | 24.3) 9.9 21 06.4 |— 7 59.3 |+1.2 08.3 6} 11 57.3 | 12.2 | 21.0 42) 411.0] 32.3) 0.2 16 54.7 |— 3 51.9 |+6.4 09. 2 Changed the 105 | 12 91.0 | 12.7 | 19.3 inclination. 129 450.1 | 23.3] 8.7 17 27.3 |— 4 21.3 |42.2 08. 2 146 |— 0 21.0 | 13.0} 18.9 164 | 19 28.9 | 23.0.) 9.0 03 00.3 |+10 05.5 |+2.2 08. 0 201 | 12 64.0 | 15.2 | 17.0 224 5 49.0 | 13.5 | 19.0 16 53.0 |— 3 42.2 |-2.0 08. 8 250 0 88.0 | 14.6 | 18.0 18 44.5 |— 5 35.1 |-0.3 09. 1 255 | 11 66.8 | 17.4 | 15.2 264 | 13 02.0 | 12.8 | 20.0 12 27.7 |+ 0 42.0 |—1.4 68.3 290} 10 19.8 | 12.3 | 20.7 299 5/9255) | 1356) (19.3 15 25.5 |— 2 12.7 |—3.9 08. 9 341) 16 53.2] 15.7 | 17.2 379 |— 0 00.8 | 17.0 | 15.9 04 34.8 |+ 8 33.8 |-0.1 08.5 393 0 10.3 | 16.9 | 16.0 408 | 17 20.6 | 18.0 | 14.7 04 16,2 |+ 8 51.2 |41.2 08. 6 430 | 10 93.0 | 17.6 | 15.7 450 6 31.3 | 14.8] 18.9 10 45.2 |4+ 2 23.4 |—0.6 08.0 Air very un- 454 3 26.5 | 16.5 | 17.3 dulating. 468 | 14 58.0 | 16.9 | 17.3 19 00.4 |\— 5 £1.6 |—0.3 08.5 487 | 13 87.6 | 19.7 | 14.9 516 4 73.0 | 13.3 | 22.0 17 53.8 |— 4 44,2 —1L.1 08.5 533 7 05.0 | 20.4 | 15.0 564] 1052.1] 9.1 | 26.0 14 59,5 |— 1 47.8 |—3.2 08.5 32 ASTRONOMY. Observations and computations for latitude—Continued. Date. 1873. October 5- -- Oetober 7. -- OGDEN, UTAH. Level. Number | Microm. of star. | readings. Remarks, N. s. aed d. d. 572 2 09.0 | 15.0 | 20.1 | Duplex med. 588 | 16 13.2 | 16.2) 18.8 600 2 60.0 | 10.9 | 24.3 629 | 15 32.7 | 23.0 | 12.0 647 | 21 98.7 }17Z.9 | 16.9 658 5 28.6 | 14.7 | 19.7 666 8 13.6 | 17.9 | 16.3 686 4 03.2 | 17.8 | 16.3 702 | 23 55.0 | 13.0 | 20.8 712 |— 1 00.4 | 19.0 | 14.7 745 | 11 93.0 | 19.6 | 14.0 777 3 94.3 | 7.2 | 26.8 Cloudy _be- 8211 5 80.9 | 14.3 | 23.3 fore. 8231 | 13 54.2] 15.6 | 22.8 8248 0 41.6 | 21.5 | 17.5 8273 | 17 86.1] 5.0 | 34.4 8282 | 17 55.7 | 20.0 | 19.2 8324 235.4] 7.6 | 32.0 ‘ Changed the 6} 12 38.0 | 13.5 | 25.6 inclination. 42 5 12.6 | 23.2 | 15.6 105 | 12 93.2 | 16.0 | 22.8 129 4 51.0 | 27.0 | 11.9 146 |— 0 65.0 | 13.8 | 25.0 164 | 18 87.0 | 28.6} 11.0 201 | 13 39.0 | 14.8 | 24.0 224 6 09.2 | 27.5 | 11.4 250 0 51.2 | 28.6 | 10.3 255 11 32.4 | 9.3 | 29.7 264 | 12 55.0] 33.3] 6.0 290 | 10 35.0 | 17.4 | 21.7 299 5 88.6 | 26.4 | 12.9 341 | 16 52.2 | 23.6 | 15.7 379 |— 0 00.6 | 16.1 | 23.2 393 0 13.2 | 17.0 | 22.3 408} 17 31.3 | 20.3 | 19.0 430 | 10 60.5 | 23.9 | 16.3 450 6 13.0 | 23.0 | 17.0 454 2 96.0 | 27.2 | 12.8 468} 14 32.0] 13.01! 27.0 Half-sum of declination. 41 20 27.5 06 33.7 04 31.1 11 40.4 23 16.0 25 52.8 04 16.6 10 45.7 19 00.8 Corrections. Latitude. Microm. eral and refr, |~°Y° Ge if “ O° au — 7 16.4 |—2.1 | 41 13 09.0 + 6 35.4 |-0.7 08. 4 + 8 33.9 |—-1.1 08.9 + 1 28.5 |—0.9 08. 0 —10 06.2 |—1.7 c8.1 —12 42.9 |—1.0 08.9 + 4 08.1 |—3.9 08, 9 — 4 00.3 |—4.5 09. 6 — 9 02.0 |—7.0 07.9 — 7 52.3 |—6.5 08.1 — 3 45.4 |—-1.2 03.6 — 4 21.7 |42.3 08. 4 +10 06.4 |-+1.8 09. 0 — 3 46.7 |+1.9 08.7 — 5 35.8 |-0.6 08. 6 + 0 38.1 |+1.9 08, 2 — 218.7 |42.5 09. 8 + 8 33.5 |+0.2 08.9 + 8 53.7 |—1.1 09. 2 ae 1981 |-s 08.5 — 5 52.8 |4+0.1 08.1 LATITUDE DETERMINATIONS. ~ a8 Observations and computations for latitude—Continued. OGDEN, UTAH. Level. Corrections. Number | Microm. wes Half-sum of }————_——_- - Date: of star. | readings. dec declination.| yriorom Latitude N. 8 and retr. Level. 1873. ’ CAG: d. d. OF Me Pe uf tole Gee October 7... 487 | 14 08.3 | 18.0 | 22.0 516 4 85.1 | 26.3 | 13.7% 41 17 54.3 |— 4 46.9 |42.4 | 41 13 09.8 533 6 67.7 | 24.0 | 16.0 564 10 21.0 | 11.8 | 28.2 15 00.0 |— 1 49.7 |—2.3 08. 0 572 2 02.4 | 35.2) 5.0] Duplex med, 688 16 20.7 6.6 | 33.7 20 27.9 |— 7 20.6 |+0.9 08. 2 600 2 56.1 | 20.2 | 20.2 629 | 15 21.5] 22.0 | 18.8 06 34.2 |+ 6 33.1 |+0.9 08. 2 647 | 22 06.0 | 21.8 | 19.0 04 31.6 |+ 8 33.9 |42.1 09. 6 658 5 45.5 | 22.9 | 18.0 666 8 24.3 | 20.2 | 20.3 11 40.9 |+ 1 26.7 |+1.3 08. 9 626 4 25.9 | 26.0 | 14.7 23 16.4 |—10 07.8 |—1.1 07.5 702 | 23 82.8 | 12.5 | 28.0 712 |— 0 78.5 | 28.9 | 12.0 25 53.2 |—12 44.6 |+0.5 09.1 745 | 11 37.9 | 26.7 | 14.8 09 05.2 |+ 4 04.7 |—1.1 08. 8 750 9 16.4 | 27.0 | 14.5 10 13.5 |+ 2 55.9 |—0.9 08.5 Ti7 3 50.1 | 12.8 | 28.7 October 8... 7731 3 13.7 | 17.0 | 18.0 } 7746 | 22 00.8 | 19.0 | 16.2 22 54.7 |— 9 46.3 |40.5 08.9 7765 | 15 86.0} 19.4 | 15.7 7803 2 26.8 | 17.0 | 17.3 06 05.0 |+ 7 02.3 |+1.2 08.5 7324 689.1} 9.6 | 25.8 16 21.5 |— 3 13.6 |+0.9 08.8 Gr. 3779 | 20 49.3] 9.0 | 26.5 23 24.5 |—10 16.2 |+0.6 03. 9 7843 0 66.1 | 27.5] 8.0 7880 9 08.8 | 23.6 | 12.2 7906 | 18 59.9] 9.8 | 26.3 18 05.5 |— 4 55.5 |—1.4 08. 6 7932 8 65.2 | 19.9 | 16.0 7962 9 00.0} 9.3 | 27.4 13 23.2 |— 0 10.8 |—3.9 08.5 7972 5 49.4 | 15.9 | 21.0 7984 10 67.5 | 17.4 | 19.4 10 29.0 |+ 2 40,9 |-1.9 08. 0 7994 3 91.1] 18.5 | 18.4 8023 12 14.0} 12.3 | 25.0: 17 27.1 |— 4 15.6 |—3.5 08. 0 8051 | 13 38.7 | 18.2 | 20.1 8104 3 68.6 Cite) |], ehh) 08 12.6 |+ & 01.4 |—5.7 08. 3 8118 8-58.6 | 17.1 | 21.3 8123} 10 65.3 | 19.7 | 19.3 14 14.8 |— 1 04.3 J—L.1 09. 4 8153 0 66.5 | 12.0 | 27.0 8160 | 17 18.3} 24.3 | 14.5 04 36.4 |+ 8 33.2 |—1.4 08. 2 8174 | 12 23.6 | 23.2 | 15.6 8188 5 89.2 | 9.7 | 29.3 09 54.2 |4+ 3 17.1 |—3.3 08. 0 3 AST 34 1873. October 8... ASTRONOMY. Observations and computations for latitude—Continued. OGDEN, UTAH. Level. Corrections. Number | Microm. __ +» | Half-sum of : of star. | readings. Remarks. * | declination. Microw ae N. s. Pater Level. t. d. d. d. fo} i a“ i a“ a“ (o) ’ 4 a“ 211 5 25.2 | 21.0 | 18.0 8231 | 13 03.9 | 10.3 | 28.9 41 17 14.6 |— 4 01.9 —4.3 | 41 13 08.4 8248 0 93.7 | 24.9 | 14.8 8273 | 18 50.2 | 10.2 | 29.0 22 17.1 |— 9 05.7 |—2.4 09.0 8282 | 16 08.9-} 22.0 | 17.3 $324 0 65.6 | 19.6 | 19.0 02 07.1 |— 7 59.5 |41.4 09. 0 6] 12 41.0 | 15.9 | 23.0 42 5 18.3 | 20.1 | 19.8 16 55.4 |— 3 44.6 |—1.9 08.9 105 | 13 07.3 | 16.3 | 23.8 129 4 83.0 | 17.2 | 22.7 17 28.0 |— 4 16.1 |—3.6 08.3 146 | 0 32.2] 20.2 | 19.3 164 |. 19 80.5 | 21.3 | 18.0 03 01.0 |+10 05.3 |+1.2 07.5 201 | 12 85.0 | 15.1 | 24.3 224 5 60.0 | 23.4 | 16.0 16 53.7 |— 3 45.2 |—0.5 08.0 250 1 18.1 | 23.0 | 16.3 18 45.2 |— 5 39.9 |4+3.9 09. 2 955 | 12 12:0 | 23.3! | 16.0 264 | 13 35.8 | 17.9 | 21.8 12 28.4 |+ 1 38.5 |40.9 07.8 290 | 11 02.1 | 12.5 | 27.0 299 6 61.7 | 26.6 | 12.9 15 26.3 |— 2 15.9 0.2 09. 2 341} 16 98.8 | 23.2 | 16.2 379 0 49.0 | 17.5 | 22.0 04 35.4 |4+ 8 32.6 |4+0.7 08.7 393 0 09.7 | 16.5 | 23.0 408 | 17 25.0 | 20.0 | 19.3 | Air undulat- 04 16.8 |+ 8 53.0 |—1.6 02. 2 ing. 430 | 11 21.0 | 19.0 ; 20.3 450 6 69.5 | 25.7 | 13.6 10 45.9 |+ 2 20.3 +3.0 09. 2 i 454 279.0 | 22.8 | 16.5 468 | 14 23.0 | 21.0 | 18.0 19 01.0 |— 5 55.4 +2.6 08. 2 487 | 14 00.0 | 16.3 | 22.8 516 4 83.5 | 21.0 | 18.0 17 54.6 |— 4 44.7 —1.0 08.9 533 7 31.1 | 22.2 | 16.8 564 | 10 86.0 | 14.5 | 24.4 15 00.2 |— 1 50.2 |\—1.2 68. 8 572 1 97.0 | 23.1 } 15.9 588] 16 14.1 | 16.1 | 22.9 20 28.1 |— 7 20.2 |40.1 08. 0 600 3 04.5 | 16.3 | 22.7 629 | 15 74.0 | 23.0 | 16.0 06 34.4 |+ 6 34.4 +0.2 09.0 647 | 22 01.2 | 21.7 | 17.3 04 31.8 |+ 8 39.9 Ly. 8 09.9 658 5 28.0 | 14.0 | 25.0 666 8 10.4 | 25.5 | 13.5 11 41.1 |+ 1 27.8 +0.3 09. 2 LATITUDE DETERMINATIONS. Observations and computations for latitude—Continued. OGDEN, UTAH. BTS) Level. Corrections. Number | Microm. - Half-sum of Date. of star. | readings. Remarks. declination. Micron N. Ss atl wisee Level. 1873. i d. d. d, fe} / a / “ “l October 8. -. 686 4 49.0 | 17.0 | 22.0 41 23 16.6 |—10 08.4 |+0.4 702 | 24 07.2 | 22.7 | 16.3 712 |— 0 55.0 | 17.4 | 21.6 25 53.4 |—12 45.0 |-+0.6 745 11 60.0 | 20.9 | 18.0 09 05.4 |+ 4 04.6 |—0.9 750 9 39.9 | 21.0 | 17.9 10 13.7 |+ 1 56.2 |—0.9 777 3 72.5 | 16.3 | 22.5 October 9. -. 7994 4 83.8 | 21.2 | 15.3 #023 | 13 18.3] 14.8 | 21.9 17 27.3 |— 4 19.3 |—-0.3 8051 | 13 27.1) 17.1} 19.8 8104 3 67.6 | 16.7 | 20.3 08 12.8 |-+ 4 58.1 |—1.7 8118 7 93.9 | 16.8 | 20.3 8128} 10 01.5] 17.3 | 19.8 14 15.0 |— 1 04,5 |--1.7 8153 1 90.0 } 16.9 | 20.1 8160 | 18 28.4] 25.5 | 11.0 04 36.6 |+ 8 29.0 |4+3.1 8174 | 12 95.2] 19.7 | 17.0 8188 6 67.5 | 15.8 | 20.9 09 54.4 |+ 3 15.0 |—0.7 8211 5 34.9 | 21.0 | 15.7 8231 | 13 21.0 | 12.0 | 24.7 17 14.9 |— 4 04.2 |-2.0 8248 0 64.9 | 18.6 | 18.0 8273 | 18 35.1] 19.6 | 17.3 22 17.3 |— 9 10.0 |40.8 8282 | 16 71.3] 16.5 | 20.5 8324 1 32.0 | 18.7 | 18.6 21 07.4 |— 7 58.2 |-1.1 6| 12 76.1 | 15 3 | 21.6 42 5 47.0 | 19.3 | 17.6 16 55.6 |— 3 46.6 |—1.3 1059 |) 132822) | 1653 520.4 120 4 82.0 | 24.0 | 12.8 17 28.1 |— 4 21.4 |4+2.0 146 018.9 | 14.7 | 22.1 164 | 19 66.5 | 24.3 | 12.3 03 01.2 |+10 05.1 |+1.3 201 |) 13 1153)) 15.0 | 21.8 224 5 94.0 | 19.1 | 18.0 16 54.0 |— 3 42.9 |-1.6 250 iP TVG) Pere) || abe 18 45.4 |— 5 38.9 |42.6 255 | 12: 05.6 | 19.0 | 18.5 264 | 13 29.1 | 20.0 | 17.6 12 28.7 |4- 1 38.4 |+0.8 290 | 1052.1 | 15.9 | 21.7 | Very faint. 299 6 12.3 | 19.2 | 18.0 15 26.5 |— 2 16.7 |—1.3 341} 17 33.5 | 20.1} 17.2 379 070.9] 9.8] 27.8 04 35.6 |+ 8 36.6 |—4.2 393 |— 0 02.0 | 17.3 | 20.1 408 | 17 20.3 | 15.0 | 22.3] Very faint; 04 17.0 |+ 8 55.1 |-2.8 hazy. Latitude. ov “ 41 13 08.6 09.0 09.1 09. 0 07.7 09. 2 08.8 08.7 08.7 08.7 08. 1 08. 1 07.7 08.7 07.6 09.5 09. 1 07.9 08. 5 08. 0 09. 3 36 ASTRONOMY. Observations and computations for latitude—Continued. OGDEN, UTAH. 7932 8 7962 or 2 © ° 9 13 23.6 |— 0 22.1 |+-7. 7972| 6 1 — wo Or WO FOV Level. Corrections. Number | Microm. s, Half-sum of 2 Date. of star. | readings. Remarks. | qeclination. Rote Latitude N. 8. er refr. Level. 1873. a | Sane on aM Se yh ir Bio riage October 9... 430 | 10 96.0 | 20.3 | 17.2 450 6 28.2 | 12.0 | 25.5 41 10 46.1 |4+ 2 25.4 |—2.9 | 41 13 08.6 454 3 60.0 | 18.8} 18.8 468 | 14 97.3 | 20.2 | 17.3 19 01.2 \— 5 53.4 |+0.8 08.6 487 | 14 21.9 | 16.3 | 21.4 | Air undulat- 516 5 12.3 | 16.4 | 22.0 ing. 17 54.8 |— 4 42.6 |—3.0 09. 2 533 6 64.0 | 20.3 | 17.8 564 | 10 22.2 | 17.2 | 21.0 14 00.4 |— 1 51.5 |—0.4 08.5 572 2 88.0 | 22.0 | 16.3 | Duplex med. : 588 | 17 09.0 | 20.0 | 18.5 20 28.4 |— 7 21.5 |4+2.0 08.9 600 33 UO) | ogi) eek ve 629 | 15 83.6 | 18.6 | 20.3 06 04.6 |-+ 6 36.9 |—2.3 08.7 58 5 39.4 | 10.0 | 29.8 666 i) TENS} | Se) eis} 11 41.3 |4+ 1 27.0 |41.2 09.5 686 Sy KESe PER Aly ER} 23 16.8 |—10 08.1 |—0.4 08.3 702 | 23 53.0) 8.9 | 30.3 712 |— 1 12.7 | 33.0] 6.1 25 53.6 |—-12 46.1 |41.5 09.1 745 | 11 75.0 | 22.6 | 16.4 09 05.6 |-+ 4 06.7 |—3.0 09.3 750 9 55.0 | 23.3 | 15.7 10 13.9 |+ 1 58.3 |-2.7 09.5 T77 3 81.2 | 10.8.) 28.0 October 10.. 7721 2 74.0 | £3.8 | 13.2 7746 | 21 29.0| 2.8] 34.4 22 50.4 |— 9 36.3 |-5.8 08.3 7765 | 15 46.8 | 17.0 | 20.0 7803 G2 OSS N seaand) 06 05.3 |+ 7 10.0 |—5.8 09.5 Changed the 7824 7 11.9 | 21.9 | 15.3 inclination. 16 21.8 |— 3 18.7 |+5.1 08. 2 Gr. 3779 | 20 71.9 | 22.8 | 14.5 23 24.9 |-10 21.3 |4+5.5 09,1 7843 0 52.2 | 24.5 | 12.7 7880 9 46. 19.6 | 1 7906 | 19 27. 30. 4 18 05.9 |— 5 04.6 |47.2 08.5 0 3 3 9 4 0 0100 BD (Tor) noe I of ww w 1 7984 | 11 0 2 10. 10 29.4 |-+ 2 31.2 |48.0 08. 6 7994 4 38. 23: 8,2 8023 } 12 93. 20. 16.7 17 27.5 |— 4 25.5 |4+6.5 03.5 8051 | 13 48.1 | 16.1 | 20.7 8104 4 05.2 | 26.3 | 10.3 08 13.0 |+ 4 53.0 |+3.1 09.1 Air undulat- 8118 7 73.0 | 23.4 | 13.3 ing. 8128 {| 10 08.0 | 26.0110.9 14 15.2 |-— 1 13.0 146.9 09.1 LATITUDE DETERMINATIONS. Observations and computations for latitude—Continued. OGDEN, UTAH. Date. 1873. October 10.. \ Number of star. Microm. readings. Level. Corrections. aye al -snin) 0 é Remarks. eclinahion® aoe Latitude. N. Ss Ail gaat. Level. d. d. fe} / a“ 4 “ a“ fo} i a“ 21.2] 15.9 24.0 | 13.0 41 04 36,8 + 8 28.4 |+4.5 | 41 13 09.7 Vie 195: 24.4 | 13.2 09 54.7 |+ 3 11.7 |4:2.5 08. 9 22.2] 14.4 19.8 | 16.6 17 15.1 |— 4 09.1 |+3.0 09. 0 25.0 | 11.0 PAO) 3} |) Ws} 22 17.6 |— 9 14.8 |45.1 07.9 13.9 | 22.3 20.3 | 15.5 21 07.6 — 7 58.8 |—1.U 07.8 16.3 | 20.9 | Closed on ac- 32.9] 5.0] count of un- 16 55.8 |— 3 53.9 |46.4 08.3 dulation of air. Besides the preceding observations, some were made on the pairs 55, 63, and 68, on the 5th, 7th, 8th, 9th, and 10th of October. to be wrong by 12”; No. 63 by 2”. made at these dates: No. 55 seems The following are the observations Number Date. of star. 1873. October 5... 55 63 68 October7-.. 55 63 68 October 8... 55 63 68 October 9... 55 63 Microm. readings. Fa 22 Poe See r3) Soar Of OD OoNwW Cort BW lane) Tor) won Nem Qe wom onan SU te) ea _ Level. Sp _ — NAY’ BOOg, wow’ nw © RR en = _ Wee Wee Ce a Ac oteallen wooo DOW wno Corrections. Half-sum of : Remarks. dealinmakions ; Latitude. Microm. eeel and refr. =i tov! aif ‘ 4 “ “ Om “a 41 22 44.6 |— 9 32.8 |+3.6 | 41 1415.4 20 14.8 |— 7 07.6 |+3.9 ital 22 45.1 |— 9 34.0 |+3.6 14.7 20 15.3 |— 7 09.2 |43.7 09. 7 22 45.3 |— 9 27.9 |—2.6 14.8 20 15.5 |— 7 03.5 |-2.4 09. 6 22 45.5 |— 9 28.0 |--2.9 14.6 20 15.7 |— 7 03.5 |—2.4 09.8 38 ASTRONOMY. Observations and computations for latitude—Continued. OGDEN, UTAH. Number | Microm. BEMS of star. | readings. 1873. t. d. October 10-.. 55 1 57.3 63 6 24.6 68 | 2C 07.6 Corrections. ' Half-sum of : a3 Remarks. aeclinanion® See Latitud 3. and refr. Level. oO. 4) lh “ ont: it 41 22 45.8 |— 9 34.9 |+3.9 | 41 1414 8 20 15.9 |}— 7 09.7 |4+-4.0 10.2 Recapitulation. The following table shows the daily means: | No. of ob- . Date. aATATGNA Mean latitude. | 1873. ig i Oct. 5 3 41 13 08.58 Oct. 7 24 08. 67 Oct. 8 3 08. 64 Oct. 9 28 08. 66 Oct. 10 16 08. 72 Giving the last date the weight 4, the mean will be The mean of all observations gives Therefore the adopted iatitude is 41° 13’ 08.647 41° 13/ 08/'.645 41° 13’ 08.65 + 0/022 OBSERVATORY STATION—OGDEN, UTAH—1873-74. 39 SEASON OF 1874. Tabuiation of stars used for determination of time at Ogden, Utah, and Washington, D. C. 1874. WASHING- WASHING- OGDEN. aS OGDEN. Ta Name of star. SISISIRRIRISSIR Sia Name of star. ISSIR SILRIe 5/5 /2|5|8/2/3/Z/5 5/5 s|5|£|8|5|5||5/£/5/5 2/2 (2/22/22 /2/5|5/2£ 2/2)/=(](2/2 2/sjais\2 elslelolslelelslesele Slsleclsislelelslsielo SlSlolslSlSl|slSl/slsls S/S/5/5/Sls|slSlslsls SIO |O|OlOjOjS\O |O/O|S peeryyeyee|oe a Andromeda ..---.-. 1X X|- e Urse Minoris,S.P .}..}..|--].. oS 22 Andromede -....--.|--|X soles Guee Onionian es 2) see alee ea esate Da We ROSAS seem enee le --|X)--|--]--]--[X a Lyre X|X|X|-- eichloc Groombridge 29- ...)--|X|-- -- --|| 8 Lyre |X| X|--]- - aallec Ge AOE Bemare cacaacer X|X|]--|--]-- Gaye Sapibtaniinc => -esec\es Cie oe 12iCett.- 2. casa see- X|X|--|X]-- JOP Dracknisiss- 2) sac. X|--|--]--- eelee ¢ Cassiopeie ....---. X|X!--[X Ona he merereee X|X|X|xX]--|- cules a Cassiopeize .....-- X|X}--1X -|--]- Coe Aquiles-eao= = 25 - X|X|X|X]-- 2 2aj|55 Bint Ceti. ase¢ 20sel|25|/2=|/25\)52)/--)/22//P<1 5S PPV D3 5552 chose: X|X|X/X<]--|- Beles 21 Cassiopeiw -........ X|X}--|X [Eat @ Sagittarir--------- X|X|X|X<]}--|--|- 2 Bradley 82......... --|--|=-|X]--]- ale Oj Draconigmeseesces. zolle|l=eal[Si Pad Pad Pd ee [eel se | le ae Fee ee Tee RISCLOMD ose 5- ----|X|X]--|X]X]- ===) [9° Aquile..-3.2 2-5-5. X<|X1X|X]- aes|a= 2) Piscium).ce-ce- --5< X}--|--|X|X!--]--]--]--]--|--]] @ Aquil~...... 2.2... X|X|X|X]. : - =2 Rolarigte-sset e262: --|--|--]--]--|--|X|]X|X|X]--]] e | Draconis .......-.. X|X|X|xX|- selloc (Mh (ORiTEHS SeSpado seeds X]--|--|X|X)--1|X| XXX] --|| y Sagittee ..--....... X|X|X|X<]--|- BHIRS 38 Cassiopeia --...--. X|--}--|X}X|- S5)[Salec|iSal| wee \G tll bye oaeneseene =-{lea}|=a|/X4leale ea |pellee Ae eRISCLODN cease == --|--|--|X|X]--1X1X).-)X]--] 3 Ursxe Majoris, L.C .|x|x|--]--|- of|saflaate- flee gv) Persel 2 5e2o. see's. 2<|(S3|/2a)[oe|>.< =e] -e=l (ple Pepastens scenes aS | Pelee |e = OAPRETRELA§ cosa asaiass 321/55||59)|=<|)><| esllocyle3||5 P=(VS= AQUA eee seas, Bax s oe Riscinmes--= 455 --|--]--]--]X)--|--|--|X|X (ie Cepheie=ss- aes Xe jecteel : e Cassiopeiz .....-.- =-{2c||5a)/25)5<|B<|l2s) [Sollee Eee, Aquaniine=osesa-s5- Oe ie] e5| al eet (eta las ale Bee Arietis: 22 c05 2. --|--|--|--|X|X1--|X]-. |X Cu erasive-ses=e s X|X!}--|--]X]-- shloe 50 Cassiopeiz ......-. =2|-=|--|--|X|X}--].-]-. IES Cephelieascescace o- Dx|P4[S445q]|54)e|/odll= Ales y Andromede ....--.|.-}-.|--|--|X|X|--|--|--|--|-.] 2 Capricorni ........ X|X]--|--|<]- pales) oe GANNON Seo s56 =a Beer --|--)--|--|X|X]--]--]X|X]--] 79 Draconis ...... ._.. X|X]--]--]X]-- Slee Le Cebiesaat issu os --|--|--|--|X]X)X]X]X|X]--]] @ Aquarii -----...... nal pal ae tel ve) fe tee c Cassiopeie .....--. Sapafa-|=-[--|X}--H--1--1-1E ig | Cephei ....-.-.---- X|X]--|- |X] - alee EPC oui eee es 22 Shes] lel SaloaleeA )p4 fe) |) PS |e =|iea| 2< je Cetisn Sos 5 28 ee: bee fees) feet |e Bed rest Let (ne) be 226) Capheit-ae=-=1-2--—- MIMS ISISSISe ae @ Waneserss escnen-ee 5 -- =[-=[-<|_-].-|--|X1x<]_- : y? Urse Minoris,§. P -|-.|- - =-|X|\q ‘Pegusi! -.5- 2.2.22: 5-|lne} cel lee B<)[><|lee eee egeL uO NT 2 eye eo E 1X eae POGasin= 222 Saecee 2. 25)|o2) ect|2=1 <)>] |-- CES Persel 2a sossas = i. ae eS P< ewe u@ephelyce ses. eee BE Fe es |e ee > Pa |- Sie LU Pee caris eeeae 2/6) 5 : a Pa4| lid aL BAT Et Ue gee 26) |2c lool lee | ps ee eon ULI eee eri tatoe - sles = ea|Padlll te ACR NT eR ee eee el ad beet belgesel 4 fe (ee SHEN cece aeciceueee ==|Fet=-le-|=-|.-1--)-12-|[--1<|| 0 Cephei ..-........- S2\ belle Salle ble se 9 Camelopardalis ....}..}..!..]..]-.]..]- BIN emapiocnsees sons, ee |fsa| 4 |s4) A Bx Be : (UT oe aaa cornoe --|--|--|--]--]--|--]--]--]--|]] 4 Draconis, L.C ..... =5|[e6| [sal |sa)|=e/><||- : BIR OnMOnIS == See. cage = a | Be sa|feelie -|X 40 ASTRONOMY. Observations and reductions for time taken at sending station. OGDEN, UTAH, OCTOBER 15, 1874. a Name of star. + T. Aa. Bb. Ce. we AR. AT. 3 thom 8. 8. er CMW Beene thas Iiiienuion cee m. 8. Vie PLEA ee eactobber 18 38 58.02 |— 0.02 |— 0.09 |— 0.00 |18 38 57.95 |18 32 41.08 | — 6 16.87 Mivied yet. TUN ers ee a 51 43.50 |+ 0.04 |— 0.08 |— 0.01 51 43. 45 45 26. 62 16. 83 W. | 50 Draconis ---- .-.. 56 40.70 |\— 0.57 |— 0.19 |— 0.02 56 39. 92 50 22.26 17.06 Welty) wsyree elas eaeene 19 00 31.75 |+ 0.05 |— 0.06 |— 0.00 |19 00 31.74 54 14.89 16.5 Wale eAquilesgesee= ene 05 55.50 |+ 0.12 — 0.05 |— 0.01 05 55. 56 59 38.50 17. 06 WE |\vem Liyreore coon eee 09 06,26 |+ 0.03 |\— 0.05 |+ 0.01 09 06.23 |19 02 49.35 16. 88 W.|d Sagittarii --.---- 16 34.68 |+ 0.24 |— 0.02 |— 0.060 16 34.90 10 17.77 7.13 Bis eDraconise.--—--= 24.13.11 |— 0.47 |+ 0.15 |4 0.02 24 12.81 17 56.14 16. 67 E. | B 31 56.40 |+ 0.07 |+ 0.05 |+ 0.01 31 56.53 25 39.74 16.7 E. | « 36 25. 44 |-+ 0.20 |+ 0.05 |+ 0.00 36 25. 69 30 08.68 17,01 BE. | y 46 34.71 |+ 0.14 |+ 0.09 |+ 0.00 46 34.94 40 17.88 17. 06 E. | a 50 56.71 |+ 0.14 |+ 0.10 |+ 0,01 50 56.96 44 39,92 17. 04 EBS le 54 51.90 |— 0.36 |+ 0.38 |+ 0.01 54 51.93 48 34.63 17.30 Bg aSacittey cee 59 27.62 |+ 0.10 |+ 0.15 |4 0.01] 5927.88] 53 10.87 17.01 E. | 3. Urs. Majoris, L. C.|20 06.35.43 |+ 0.68 |— 0,14 0. 02 }20 06 35.95 20 00 19.03 | — 6 16.92 NORMAL EQUATIONS. 0=+ 0.94 + 15.00 dt+ 159a— 2.1le 0=+5.06-+ 1.59 di+19.40a— 841e a= + 05.260 0=—1,99— 211 dt— 841la+ 57.30¢ = + 08.005 for E. OGDEN, UTAH, OCTOBER 15, 1874. = Name of star. T. Aa. Bb. Ce. ALS AR. AT. S hom 8 8. 8. Sa hm. 8. hom. 8. m. 8. BE. | 8 Cephei....-.---.|21 33 19.68 |— 0.24 |+ 0.18 0.00 21 33 19. 62 }21 27 02.52 | — 6 17. By ee: eA U ari =e eee 37 21.97 |+ 0.13 |+ 0.04 0. 00 37 22. 14 31 05.21 16. 93 Re) |e \herasi sae. s eee 44 18.96 |+ 0.09 |+ 0.06 0. 00 44 19.11 38 02.26 16.95 BK. | 11 Cepheil-..--- ---- 46 22.27 |— 0.25 |+ 0.21 0. 00 46 22.23 40 05.36 16. 87 KE. | « Capricorni ....-. 52 45.08 |+ 0.14 |+ 0.05 0. 00 52 45, 27 46 28.34 16. 93 BK. | 79 Draconis ......-- 7 36.13 |\— 0.30 |+ 0.26 0. 00 57 36.09 51 19.18 16. 91 Baia Aquanil seses eee 22 05 38.16 |+ 0.11 |+ 0.07 0.00 )22 05 38.34 59 21.34 17.00 Wel" (Cepheimes--scese 12 47.87 |+ 0.06 0. 00 0. 00 12 47.93 )22 06 30.95 16.98 We)|00) eAquanies=-s-=ee 16 31.10 |— 0.10 |— 0.01 0. 00 16 30.99 10 13.85 17.14 Wy, “Aquanil-cosceee 21 28.87 |— 0.08 |— 0.03 0.00 21 28.76 15 11.58 17.18 Wa) a) Aquanies----=— 25 10.40 |— 0.08 |— 0.05 0. 00 25 10.27 18 53.21 17. 06 W.| 9 Draconis, L.C...| 30 38.63 |— 0.46 |4+ 0.18 0. 00 30 38.35 24 21.58 16.77 W. | 226 Cephei .----..... 35 22.08 |+ 0.27 |— 0.23 0. 00 35 22.12 29 05. 36 16.7 Weil (Rerasic-.-s2=se- 41 30.52 — 0.06 |\— 0.04 0. 00 41 30.42 35 13.23 | — 617.14 NORMAL EQUATIONS. For E.: 0=-+ 0.01 + 7.00 dt-— 1.894 O0=—152+1.289dt+ 9.574 a= -+ 08.167 For W.: 0=-+ 0.48 + 7.00 d¢+ 3.664 0 = + 2.59 + 3.66 dt + 21.05 a = — 08,122 Adopted c = 05.00, TIME DETERMINATIONS. 41 Observations and reductions for time taken at sending station—Continued. OGDEN, UTAH, OCTOBER 15, 1874. a. 5 Name of star. Ath Aa. Bb. Ce: at AR. [AVS 5 hem. 8. 8. ae 8. hm 8. hem. 8 m3 Wallies (Cotes: aoh22252- 0 19 21.14 |— 0.07 |— 0.01 |— 0.02 | 0 19 21.04 | 0 13 03.63 | — 6 17.41 Wit 12) Cetigensas.cs2-8 29 57.01 |— 0.06 |— 0.01 |— 0.02 29 56. 92 23 39. 64 17.28 W.|¢ Cassiopeix..-.--- 36 18.20 |-+ 0.03 |— 0.02 |— 0.03 36 18.18 30 00, 95 17.23 W.| a Cassiopeiz.----- 39 42.71 |+ 0.04 |— 0.01 |— 0,03 39 42.71 33 25. 56 17,15 W. | 21 Cassiopeix.----. 43 43.63 |-+ 0.18 0.00 |— 0.07 43 43.7 37 26.57 Ue, Ue/ W.| u Andromed.- --.. 56 06.37 |— 0.01 0.00 |— 0.03 56 06. 33 49 48, 90 17.43 BE. |e Piscium .....-..| 1 02 44.65 |— 0.05 |4 0.05 |+ 0.02 | 1 02 44.671) 56 27. 43 17. 24 E.| @ Andromedw.....| 09 01.19 |— 0.01 |4 0.07 |+ 0.03 09 01.28 | 1 02 44.18 17.10 1h |i IEC SSeeeecn 11 08.85 |— 0.02 |-+ 0.06 |+ 0, 02 11 03.91 04 46.76 17.15 Hei)o Piscwm§-f2-.- 2. 18 53.06 |— 0.03 |-+- 0.04 |+ 0.02 18 53. 09 12 35. 86 17.23 Bley OL" (Ceti seceen ae a0 24 04,23 |— 0.07 |-+ 0.02 |+ 0.02 24 04.20 17 46.75 17.45 E. | 38 Cassiopeia. ----. 27 14.99 |+ 0.12 |-+ 0.05 | 0.05 27 15. 21 20 57.95 — 6 17.26 NORMAL EQUATIONS. 0O—= + 0.08 + 12.00 dt —0.60 a— 2.05 ¢ 0= + 0.67 — 0.60 d¢+ 848 a+ 5.41 ¢ a= — 05,092 0=— 0.25 — 2.05 dt + 5.41 a + 37.65 € c= + 08.019 OGDEN, UTAH, OCTOBER 16, 1874. a eI Name of star. Te Aa, Bb. Co: te AR. AE 5 | he m.- 8. Sp Bs 8. (ORES ee hom. 8: m 8. has dye). <2) costs 18 38 43.03 |+ 0.02 |+ 0.19 |4 0.10 |L8 38 43.34 /18 32 41.06 | — 6 02. 28 10D )| él Wives ae esocspeoe 51 22.63 |+ 0.06 |+ 0.18 |+ 0.10 51 28.97 45 26. 60 02. 37 E. | o Sagittarii.-.-.. - 53 31.09 |+ 0.34 |+ 0.06 |+ 0.09 53 31.58 47 29.16 02. 42 Idol 52. AUR Pegs Soe cece 19 00 16,87 |+ 0.06 |+ 0.18 |+ 0.10 /19 00 17.21 54 14.85 02. 36 136 Me ANG Wes) Soaps ess 05 40.57 |+ 0.16 |+ 0.15 |+ 0.08 05 40. 96 59 38. 49 02. 47 194 INGe Sibi eyemeieseremeee 08 51.31 |+ 0.03 |+ 0.20 |+ 0.10 08 51.64 |19 02 49.34 02. 30 E. | d 16 19.79 |+ 0.30 |+ 0.09 |+ 0.08 16 20.26 10 17.76 02.50 W.| 7 23 59.73 |— 0.60 |— 0.17 |— 0.28 23 58. 638 17 56. 06 02. 62 W.| B i 31 41.90 |+ 0.09 |— 0.06 |— 0,09 31 41. 84 25 39.72 02, 12 W. | « i 36 10.95 |-- 0.25 |— 0.01 |— 0.08 36 11.11 30 08. 67 02, 44 W.| y Aquila 46 20.09 |+ 0.17 0.00 |— 0,08 46 20.18 40 17.87 02.31 W, | a Aquile..--. =... 50 42.15 |+ 0.18 |4 0.02 |— 0.08 50 42. 27 44 39.91 02. 36 Wie Draconis. ----- -- 54 37.49 |— 0.46 |+ 0.11 |— 0.23 54 36.91 48 34.57 02. 34 W.| y Sagitte.........) 59 18.12 | 0.13 |-+ 0.05.|— 0, 08 59 13. 22 53 10. 87 02. 35 W.| 3 Urs. Majoris,L.C./20 06 20.57 |+ 0.86 |— 0.04 |+ 0.22 )20 06 21.61 |20 00 19.11 | — 6 02.50 NORMAL EQUATIONS. O= + 1.20 + 15.00 dt+ 4.82 a— 0.74 ¢ O0——5.73 + 4.82 dt -+ 15.62 a + 18.22 ¢ a= + 08.330 0=—9.58— 0.74 dt + 18.22 a -+ 43.01 c 6 = +- 05.080 42 ASTRONOMY. Observations and reductions for time taken at sending station—Continued. OGDEN, UTAH, OCTOBER 16, 1874. I Name of star. rr Aa. Bb. Ce. US AR. AT. 5 al | h.m. 8: 8. 8. 8. fim: 478. h. m. 8. m 8. Wi. L Pegasi....- ..<- 21 22 20.05 |4+ 0.02 |+ 0.06 |— 0.05 21 22 20.08 |21 16 17.74 | — 6 02.34 W.| 8 Aquarii .-. 31 00.63 |+ 0.04 + 0.03 |— 0.05 31 00. 65 24 58. 06 02. 59 W.| 6 Cephei.. 33 05.40 |— 0.07 + 0.05 /— 0.15 33 05. 23 27 02. 46 02.77 Walia eAquariieses ees. 37 07.62 |+ 0.04 0.00 |— 0.05 37 07.61 31 05.20 02. 41 Welwes eras f2o-ce--: 44 04.66 |+ 0.03 — 0.02 |— 0,05 44 04, 62 38 02.25 02. 37 Wis elise Capertee. sae. 46 08,24 |— 0.07 |— 0.08 |— 0.15 46 07.94 40 05.30 02, 64 W.| # Capricorni -.-.-. 52 30.938 |+- 0.04 \— 0.03 |— 0.05 52 30.94 46 28.33 02. 61 W.| 79 Draconis-..---. 57 22.14 |— 0.09 |— 0.14 |— 0.17 57 21.74 51 19.12 02. 62 Byte) eAguaniles see 22 05 23.84 |+ 0.03 |+ 0.09 + 0.05 [22 05 24.01 59 21.33 02. 68 E.|¢ Cephei 12 33.28 |— 0.03 |+ 0.21 |+ 0.09 12 33.55 |22 06 30. 92 02. 63 EK. | @ Aquarii -- 16 16,34 |+ 0.04 |+ 0.07 |+ 0.05 16 16,50 10 13.84 02. 66 E. | y-—Aquarii -- 21 14.20 |+ 0.03 |-|- 0.08 | 0.05 21 14.36 15 11.57 02.79 E.| « Aquarii 24 55.70 |+ 0.03 \+ 0.08 |+ 0.05 24 55. 86 18 53. 20 02. 66 E.|9 Draconis, L. C -: 30 24.57 |+ 0.19 — 0,20 |— 0.21 30 24.35 24 21.66 02. 69 E. | 226 Cephei .--. ----. 26 07.43 |— 0.11 |-+ 0.33 |+ 0.20 26 07.85 20 05.30 | — 6 02.55 NORMAL EQUATIONS. 0=-+ 0.33 + 15.00 St+ 2.39a— 8.87 ¢ 0=—0.99-+ 2.39 dt + 31.06 a— 11.49 ¢ a= -+ 03.051 0=— 3.30— 8.87 dt—11.49a+ 76.52¢ ec =+ 08.051 OGDEN, UTAH, OCTOBER 16, 1874. & 5 Name of star. Abs Aa. Bb. Ce. Ty: AR. AT. a lin tis — Sh | oy 8. 8. hams. 8: he ms 78: m. 8. E.| a Andromede. -.-- 0 07 57.79 + 0.19 |+ 0.23 |+ 0.01 | 0 07 58,22 | 0 01 55.56 | — 6 02.66 E. | 22 Andromede ..-... 09 51.91 — 0.07 |+ 0.30 |+ 0.02 09 52.16 03 49.71 02. 45 Bs | y Pegasii-=------- 12 50.09 + 0.35 |4+ 0.19 |+ 0.01 12 50. 64 06 47.92 02.72 E. Groombridge 29 - 15 15.09 — 1.80 |+ 0.72 |+ 0.05 15 14. 06 09 11.24 02. 82 Beale. (Ceti teekns - 19 05.66 + 0.59 |4+ 0.13 |+.0.01 19 06.39 13 03.63 02.76 Es | 12 Ceti 22sec 2-2 29 41.66 + 0.54 |4+ 0.14 |4+ 0.01 29 42.35 23 39.64 02.71 E. | ¢ Cassiopei ...-.. 36 03.58 — 0.26 |+ 0.32 |+ 0.02 36 03. 65 30 00. 95 02.71 W.| a Cassiopeiw..---- 39 28.30 |— 0.34 |+ 0.09 |— 0,02 39 28. 03 33 25. 56 02. 47 W. | 21 Cassiopeixv..---. 43 30.70 — 1.51 |+ 0.12 |— 0.04 43 29, 27 37 26.57 02.70 W.| « Andromedez .... 55 51.77 + 0.06 |+ 0.05 |— 0.02 55 51.86 49 48.89 02, 97 Waite: isciumy-2e-s: 1 02 29.88 + 0.43 |+ 0.03 |— 0.01 | 1 02 30.33 56 27.43 02. 90 W.| 8 Andromede .... 03 46.85 + 0.10 |+ 0.04 |— 0.01 08 46.98 | 1 02 44.18 02. 80 Wel Pisecium)sss.---- 10 49.27 + 0.18 |+ 0.02 |— 0.0L 10 49. 46 04 46.76 | — 6 02.70 NORMAL EQUATIONS. 0 =-+ 1.83 + 13.00 dt— 2.07a4+ 1.36¢ 0=— 9.00 — 2.07 dt + 12.02a— 1.40 ¢ a= -+ 05.746 0=+0.50+4+ 1.36 5t— 1.40a + 49.22¢ c= + 08,012 TIME DETERMINATIONS. 43 Observations and reductions for time taken at sending station—Continued. OGDEN, UTAH, OCTOBER 17, 1874. a g Name of star. Abe Aa. Bb. Ce. aL AR. Pe s) hem. 8. 8. 8. 8. eit Eb le Gin, Mm. 8. Vive (2 Wiad) eseeco eeece 18 38 45.16 |+ 0.11 |+ 0.11 |— 0.16 |18 38 45. 22 /18 32 41.04 | — 6 04.18 Aivo|| (gh Abii yecesenecaoe 51 30.54 |+ 0.31 |4+ 0.10 |— 0.14 51 30.81 45 26.58 04, 23 W.| oc Sagittarii ...-... 53 31.74 |-+ 1.88 |+ 0.03 |— 0.18 53) 33.52 47 29.14 04. 38 Waly dayreee-=------ 19 00 18.76 |+ 0.33 |+ 0.10 |— 0.14 |19 00 19.05 54 14.84 04. 21 Wee ANGmMIES Sno sose5 05 42.08 |+ 0.87 |+ 0.07 |— 0.13 05 42.89 59 38, 47 04, 42 Wea |eee ayes eeerene are 08 53.40 |-+- 0.20 |-- 0.10 |— 0.15 08 53.55 |19 02 49. 32 04, 23 W.| d Sagittarii..----. 16 20,48 |+ 1.68 |+ 0.04 |— 0.13 16 22. 07 10 17.74 04, 33 Bp) Draconises----—- 24 02.62 |— 3.32 |4+ 0.52 |-+ 0.42 24 00.24 17 55.97 04, 27 E. | 8 i 31 42.93 |-+ 0.49 |+ 0.19 |4+ 0.14 31 43.75 25 39.70 04, 05 E. | « 36 11.33 |-+ 1.38 |4- 0.12 |+ 0.12 36 12. 95 30 08. 65 04, 30 E. | y 46 20.90 |+ 0.95 |+ 0.13 |+ 0.12 46 22.10 40 17.85 04, 25 E. | a 50 42.90 |+ 0.98 |+ 0.13 |+ 0,12 50 44.13 44 39.89 04, 24 E. | € 54 40.70 |— 2.56 |+ 0.38 |+ 0.35 54 38.87 48 34.50 04. 37 E. | y 59 14.08 + 0.73 |+ 0.15 |+ 0.18 59 15. 09 53 10.85 | — 6 04,24 NORMAL EQUATIONS. 0=— 3.554 14.00 dt+ 2.22a-+ 3.49¢ O0=— 14.66 + 2.22 dt-++ 8.86a—11.02¢ a= + 15.822 O=+ 16.62+ 3.49 dt — 11.02 a+ 35,34 ¢ c=-+ 083.121 OGDEN, UTAH, OCTOBER 20, 1874. Clamp. Pb -E-E EE fol lolli oie) YwVMOAwVR SDI CAlWwWwDA . Name of star. ub Aa. Bb. Ce: i AR. (Mt ee ee ee hom 38. 8. 8. 8. hom. | 8 hem. 8: te th lita tebe maseese 18 38 49.06 |+ 0.10 |+ 0.13 |4+- 0.28 /18 38 49.57 |18 32 40.97 | — 6 08. 60 INES) Gasceoobeab 51 34.61 |+ 0.29 |+ 0.09 |+ 0.26 El BSh OD 45 26.51 08.74 Lyre ...--.-.--.{19 00 22.73 |+ 0.31 |+ 0.07 |4 0.25. /19 00 23. 36 54 14.79 08. 57 Agquilss 22. -/----< 05 46.03 |+- 0.83 |+ 0.04 |-+ 0, 22 05 47.12 59 38. 42 08. 70 JUN) poe Ceesecoo 08 57.37 |+ 0.19 |+ 0.02 |+ 0.26 08 57.84 |19 02 49,24 08. 60 Sagittarii...--.. 16 24.47 |-+ 1.58 |— 0.01 |+ 0.23 16 26. 27 10 17.69 08. 58 Draconis-..------ 18 40,32 |— 1.97 |— 0.12 |+ 0.56 18 38.79 12 30.18 08. 61 Draconis --.- --= 24 07.03 |\— 3.13 |— 0.15 |4 0.74 24 04.49 17 55.73 08.76 (Chuan Geedeciease 31 48.09 |+ 0.47 |— 0.14 |— 0.24 31 48.18 25 39. 64 08. 54 Achaia yeeeere sa 36 16.43 |+ 1.21 |— 0.09 |— 0.22 36 17.33 30 08. 60 08. 73 Aguilsseees <== 46 25.94 |-+ 0.89 |— 0.12 |— 0.22 46 26.49 40 17.80 08. 69 Aquilw ......... 50 47.96 |+ 0.93 |— 0.13 |— 0,22 50 48. 54 44 39.84 08.70 Draconis....---- 54 46.36 |— 2.41 |— 0.41 |— 0,62 54 42.92 48 34.29 08. 63 Sagittarii -....-. 59 19.10 |4+ 0.69 |— 0.17 |— 0,23 59 19.39 53 10.79 08. 60 Aquilyess7ss=. 20 04 08.94 |+ 0.98 |— 0.13 |— 0.22 20 04 09.57 57 00.88 | — 6 08.69 NORMAL EQUATIONS. 5.00 + 0.6la+ 3.88 ¢ 0.61dt+9.44a— 6.22¢ a=-+ 18.721 3.88 dt — 6.22 a+ 41.94 c c = + 08.214 ] 44 ASTRONOMY. Observations and reductions for time taken at sending station—Continued. OGDEN, UTAH, OCTOBER 20, 1874. EI Name of star. mh Aa. Bb. Ce. TY, - AR. AT. a Ra mn. U8: 8. Ss. 3. hem. 8. Lit Fie oh mM. 8. Wil ele Cetie ss. ssn. 0 26 47.73 |+ 1.24 |— 0.15 |— 0.21 | 0 26 48.61 | 8 20 39.67 | — 6 08.94 W.| ¢ Cassiopeiw.----.| 36 11.10 |— 0.60 |— 0.33 |— 0.24 36 09. 83 30 00. 96 08. 87 W.| a Cassiopeix.-.---. 39 35.96 |— 0.77 |— 0.36 |— 0.36 39 34. 47 33 25.55 08. 92 W. | 21 Cassiopeiw.-.--- 43 40.78 |— 3.47 |— 0.65 |— 0.75 43 35.91 37 26.52 09. 39 W. Bradley 82...--- 49 21.23 |— 1.46 |— 0.42 |— 0.46 49 18.89 43 09. 56 09. 33 W.| u Andromede..... 55 58.43 |-+ 0.14 |— 0.25 |— 0.26 55 538, 06 49 43, 90 09. 16 W2.|fe" SRiscimmiyeesseee= 1.02 35.88 |+ 0.98 |— 0.27 |— 0.20 | 1 02 36.49 56 27.44 09, 05 W.| 8 Audromedee. ---- 08 53.40 |+ 0.22 I— 0.24 |— 0.25 08 53.13 | 1 02 44.18 08. 95 Wool eqaeiscigm =e ee 10 55.68 |-+ 0.41 J— 0.23 |— 0.23 10 55. 63 04 46.76 08. 87 16 || (ms ECINITN segsnso5 18 44.42 |+ 0.48 |— 0.03 |+ 6.23 18 45. 10 12 35. 86 09, 24 Beh Cetie ses = 23 54.75 |+ 1.34 |— 0.02 |+ 0.21 23 56. 28 17 46.78 09. 50 E. | 32 Cassiopeiz 28 0°.73 |— 2.36 |— 0.13 |+ 0.58 28 06. 82 21 57.98 08. 84 Wil 7 ISKCON Se s555e 30 56.19 |+ 0.79 |— 0.06 |+ 0.21 30 57.13 24 47.70 | — 6 09,43 NORMAL EQUATIONS. - 0=-+ 6.38 -+ 13.00 dt —1.78 a— 9.00 c¢ 0=—16.65— 1.78 dt+8.79 a+ 6.57 ¢ a=-+ 18,720 0 =—21.0L— 9.00 dt-+ 6.57 a + 42.75 ¢ c=-+ 05.203 OGDEN, UTAH, OCTOBER 29, 1874. EI Name of star. | T. Aa. Bb. Ce. me AR. AT. a hm. 8. 8. 8. 8. Ramee: Raine 18. Mm. 8. B.| @ PRegasi + 2..2--5: 21 44 24.07 |+ 0.34 |— 0.05 |4+ 0.15 }21 44 24.51 /21 38 02.08 | — 6 22.43 E. | w Capricorni..-.-.] 52 50.05 |+ 0.54 |— 0.03 |4 0.15 52 50.71 46 28,16 22.55 . | 79 Draconis ..-2--- 57 42.26 |— 1.16 |-— 0.23 |4+ 0.50 57 41.37 51 18.29 23. 08 10g |) Ge ANG ene See eae 22 05 43.42 |-+ 0.43 |— 0.06 |4+- 0.14 }22 05 43.93 59/2119 22.74 Bal ecuephely een nas 52 12 53.40 |— 0.33 |— 0.19 |+ 0.27 12 53.15 |22 06 30.54 22.61 105 LG) JACMDNNE see eee 16 35.88 |+ 0.50 |— 0.07 |+ 0.15 16 36. 46 10 13.70 22.76 BE. | y Aquarii----..... 21 33.73 |+ 0.43 |— 0.09 |+ 0.14 21 34.21 15 11.43 22.78 Baliga eAquanie as. -—- = 25 15.34 | 0.41 |— 0.09 |+ 0.14 25 15. 80 18 53. 07 22.73 E. | 9 Draconis,L.C-..| 30 43.41 |+ 2.40 |4+ 0.28 |— 0.61 30 45. 48 24 22.80 22. 68 EB. |226 Cephei -..------ 36 28.12 |-— 1.41 |\— 0.46 |+ 0.58 36 26, 83 30 04.44 22.39 Waite WRepasiens=s---- 41 36.25 |+ 0.33 |— 0.17 |— 0.15 41 36.26 35 13.14 23. 12 Wali ebebasieens- or 43 31.16 |-++ 0,15 |— 0.22 |— 0,17 43 30, 92 37 08.17 22.75 We|. a) eepasien a= --—~ 46 53.23 |-+ 0.21 |— 0:20 |— 0,15 46 53.09 40 30.16 | — 6 22.93 NORMAL EQUATIONS. 0=— 0.934 13.00 dt+ 4.46a+ 7.92¢ 0=—11.35-+4 4.46 dt+ 25.98 a — 28.96 c a—-+ 05.638 O=-+ 1181-4 7.92 d¢t— 28.96 a + 59.16 ¢ c=+0%144 Observations and reductions for time taken at sending station—Continued. TIME DETERMINATIONS. OGDEN, UTAH, OCTOBER 29, 1874. = = Name of star. . At Aa. Bb. Ce. stp AR. AT. 5 hm. 8 8. 8. Oy. Wie ny EE ham. 8. mM. 8 W.| « Andromede....-| 0 56 12.21 0.00 |— 0.25 |— 0.22 | 0 56 11.74 | 0 49 48.92 | — 6 22.82 W./ e Piscium -.---.-... 1 02 50.57 |— 0.03 |— 0.16 |— 0. L 02 50.21 56 27.46 22.75 W.| @ Andromeda. ---- 09 07.26 0.00 — 0.24 |— 0.21 09 06.81 | 1 02 44,22 22.59 Walon Pistiom) ==-2--2- 11 09.81 |— 0.01 |— 0.22 |— 0.20 11 09.38 04 46. 80 22.58 W.| v Piscium ~-.-.-.--- 18 59.03 - 0.01 — 0.19 |— 0.19 18 58. 64 12 %. 91 22.73 Wien) Grin Bees cates 24 10.05 |— 0.04 |— 0.10 |— 0. 24 09.74 17 46.81 22.93 W. | 38 Cassiopeiz.-----. 28 21.66 |+ 0.06 |— 0.40 |— 0.49 24 20.83 21 58.01 22, 82 W.| 7 Piscium -.--..--.- 31 10.97 |— 0,02 |— 0.14 |— 0. 31 10.63 24 47.75 22. 83 Welty Persetjaces-5-- 2" 36 42.87 |+ 0.01 |— 0.22 |— 0.26 36. 42. 40 30 19. 64 22.76 Weld) Persein------1---- 42 13.41 |-+ 0,01 |— 0.24 |— 0,27 42 12.91 35 50. 22 22. 69 Wejo Piscinm( -==--..-- 45 10.€9 |— 0,02 |— 0.14 |— 0. 45 10.56 38 47.81 22.75 E. |e Cassiopeiz.----. 51 48.13 |+ 0,04 — 0.16 |4+ 0.38 51 48.39 A5 25. 65 22.7: Dn || (By Uden seas 54 06.94 |— 0.02 |— 0.08 |+ 0.1 54 07.02 47 44.26 22.7 E. | 50 Cassiopeix.----- 59 11.14 |+ 0.07 |— 0.25 |4+ 0.5% 59 11.51 52 48.70 22.81 E.| y Andromedez.--..- 2 02 36. 47 0.00 |\— 0.14 |+ 0.23 | 2 02 36.56 56 13.89 22. 67 10 ||. AOR UTR eos 06 30.37 — 0.01 |— 0.10 |+ 0.18 06 30.44 | 2 00 07.81 22. 63 Bea ee Cethe cece. oa. 3: 12 45.46 |— 0.02 |— 0.09 |4 0.1 12 45, 52 06 22.64 | — 6 22,88 NORMAL EQUATIONS. 0=— 1.68+ 17.00 dt + 0.10a— 4.86 ¢ 0=+1.08+ 0.10 d¢+746a— 442¢ a= — 08.045 0=— 6.86 — 4.86 dt — 4.42 a + 42.97 ¢ c=+ 08,172 OGDEN, UTAH, OCTOBER 31, 1874. = g Name of star. Ts Aa. BD. Ce. TY, AR. AT. ‘S) | At ms .038! oe 8 38. ham. he me 8 m, §. W. | 226 Cephei ....-----. 22 36 28.93 |+ 0.43 |— 0.43 |— 0.64 [22 36 28,29 |22 30 04.30 | — 6 23.99 W.| ¢ Pegasi-.-..-.--. 41 38.06 |— 0.10 |— 0.11 |— 0.16 41 37.69 3D 13,12 24.57 Wile) ef aete= seeee-- 43 33.04 |— 0,04 |— 0.14 |— 0,18 43 32.68 37 08.14 24,54 W.| 4 Pegasi...-..----. 46 54.96 |— 0.06 |— 0.14 |— 0.17 46 54,59 40 30.14 24. 45 Wail e Cephel 222s 5-2 51 38.61 |+ 0.18 |— 0.29 |— 0.38 51 38.12 45 13.7 24, 42 Baia Pepask--.--.---- 23 04 56.72 |— 0.70 |— 0.05 |+ 0.16 |23 04 56.13 58 31.71 24, 42 BE. | « Cephei .....-.= 10 16.58 |+ 3.12 |— 0.19 |4 0.60 10 20.11 |23 03 55.77 24, 34 E. | o Cephei -.... .... 19 52.73 |-+ 1.72 |— 0.19 |4+ 0.4 19 54. 67 13 29.97 24.7 Idi) LRG SIB 6 asoes 25 33.13 |— 0.52 |— 0.09 |4+ 0.1 25 32. 69 19 08.17 24, 52 E. | 4 Draconis, L. C... 30 24.30 |— 4.07 |+ 0.09 |— 0.4 30 19. 86 23 55.39 | — 6 24.47 NORMAL EQUATIONS. For W.: 0=— 2.94-+ 5.00 dt— 2.124 O=+ 2.29—2.12 dé+ 6.29 4 a =— 08.194 For E.; 0=— 1.60+5.00 dt+ 0.304 0 =+ 19.99 + 0.30 dt + 13.48 a a=— 13.492 Adopted c= -+ 0.158 for E. 46 ASTRONOMY. Observations and reductions for time taken at sending station—Continued. OGDEN, UTAH, OCTOBER 31, 1874. a 5 Name of star. i Aa. Bb. Ce. Te AR. AT. oD - ems esse el 8. Bs 8. hum. — 8: hem. 8: m. 8. E. | e« Cassiopeia.--:-- 1 51 48.86 |+ 1.16 |— 0.20 |+ 0.35 | 1 51 50.17 | 1 45 25.66 | — 6 24.51 Re PGReARIOLIS ea) = 54 09.25 |— 0.54 |— 0.10 |+ 0.17 54 08.78 47 44, 27 24.51 E. | 50 Cassiopeixw.-.--. 59 10,91 |+ 2.30 |— 0.22 |+ 0.51 59 13.50 52 48.71 24.79 E. | y Andromede .-...| 2 02 38.33 |4+ 0.01 |— 0.08 |+ 0.21 | 2 02 38.47 56 13.90 24.57 B. |@ Arietis -<- ------ 06 32.72 |— 0.47 |\— 0.05 |+ 0.17 06 32.37 | 2 00 07.83 24.54 Bi (ets (Cetiiaccnca-ceses 12 47.97 |— 0.78 |— 0.04 |+ 0.16 12 47.31 06 22.66 24. 65 W.| 2 Cassiopeia...--. 25 11.92 |+ 1.55 — 0.57 |— 0.40 | 25 12.50 18 47.90 24. 60 Writ Cetiesecse masse. 27 56.85 |— 0.78 |— 0.21 |— 0.16 27 55.70 21 30.98 24.72 Weilitd. (Ceties-ec.can- 39 30.93 |— 0.93 |— 0.19 |— 0.16 39 29.65 33 04.86 24.79 SW MG eeercera seen eae 42 05.14 |+ 0,28 |— 0.38 |— 0.24 42 04.80 35 40.29 24.51 Wrall fem Oot Reese een 44 37.06 |— 0.75 |— 0.22 |— 0.16 44 35.93 38 11.30 | — 6 24.63 NORMAL EQUATIONS, O—— 238+ 11.00 d¢—0.76a+ 281¢ O=+ 9.44— 0.76 6t+6.15a— 438 ¢ ASS 0=—1148+ 2.81 dt—4.38 a + 32.07 ¢ c—+05.158 NotE.—The instrument had to be removed from its pier every day to allow the carpenter to work in the observing-room. Observations and reductions for time taken at receiving station. NAVAL OBSERVATORY, WASHINGTON, D. C. - ire] +> rs Ie) 8a © De OB OMA Bus) | esee |p Eee) Poe Date. Star. tee Aa. Bb. Ce. aS og-| Ba | 3438 v. place. Bo HS | Bo 25 BR ae ao Zoo DO a Ae | OG ae |S = fe) 1874. hm. 8 Gh 8. 8. 8. 8 8. 3 Oct. 15 |y Pegasi ....-- 0 07 38.52 |— 0.47 |— 0.44 |— 0.01 |— 0.92 | 37.60 | 47.92 |—49.68 —0. 02 Cetiese ees 38 10.13 |— 0.97 |— 0.27 |— 0.01 |— 1.25 | 08.88 | 19.19 .69 |—0, 01 e Piscium..-.-..| 0 57 18.10 |— 0.58 |— 0.40 |— 0.01 |— 0.99 | 17.11 | 27.44 - 67 |--0. 02 Polaris .--.-. 1 13 50.50 |+-35.13 |—13.08 |— 0.42 |--21.63 | 12.13 | 22.36 |...----- \osccae PLRCGtipesee see: 18 37.61 |— 0.82 |— 0.32 |— 0.01 |— 1.15 | 36.46 | 46.77 .69 -L0. 02 7 Piscium-.--- 1 25 38.32 |— 0.46 |— 0.44 |— 0.01 |— 0,91 | 37.41 | 47.74 - 67 +0.04 fl (@ati=--- ss. 2 07 13.26 |— 0.56 |— 0,41 |— 0.01 |— 0.98 | 12.28 | 22.54 -74| 0.00 a2 (ON eres cane 2 37 40.33 |— 0.64 |— 0.38 |— 0.01 |— 1.03 | 39.30 | 49.52 |-49.78 |\—0. 02 Oct. 16 |@ Andromede.| 0 02 46.33 |— 0.23 |— 0.50 |— 0.01 |— 0.74 | 45.59 | 55.58 |—50.01 +0. 01 B Geticek- 2 38 10.42 |— 0.97 |— 0.25 |— 0.01 |— 1.23 | 09.19 | 19.19 -00 -L0. 02 e Piscium..... 0 57 18.48 |— 0.58 |— 0.39 |— 0.01 |— 0.98 | 17.50 | 27.45 .05 —0. 04 Polaris ss. = 1 13 50.00 |+-35. 13 |—12. 26 |— 0. 42 |+-22. 45 | 12.45 | 22.39 |.....-.- |e @AXCetiaees eo 18 37.92 |— 0,82 |— 0.31 |— 0.01 |— 1.14 | 36.78 | 46.78 |—50. 00 | 0. 00 7 Piscium..... 25 38.64 I— 0.46 |— 0.42 |— 0.01 |— 0.89 | 37.75 | 47.75 |—50.00 | 0.00 Bp Avietis...--. 1 48 34.97 |— 0.37 |— 0.45 |— 0.01 |— 0.88 | 34.14 | 44.17 |—49. 97 -10. 02 BUI CEU ary ooee 2 07 13.47 I— 0.56 I— 0.39 I— 0.01 I— 0.96 | 12.51 | 22.55 1-49.96 -+0. 02 CORRECTIONS AND RATES OF CHRONOMETERS. 47 Observations and reductions for time taken at receiving station—Continued. NAVAL OBSERVATORY, WASHINGTON, D. C. me |) SB. | tA a8 |t4 [28 |-3¢ Date. Star. ESE lta Tare Bb. Ce. BS Oe Ee |) Bue ay HEN Be eee tere |e S Tae one (EOS ors TEN NS) < ° 1874. Toe Wis Oe B 8. By 8. 8. 8 : Oct. 20 |e Piscium..--. 0 57 19.66 |— 0.56 |— 0.39 |— 0.02 |— 0.97 | 18.69 | 27.46 |—51. 23 |+-0. 01 Polaris...==: 1 13 52. 82 |-33. 84 |—12.54 |— 0.8 |4+20.45 | 13.27 | 22.00 |....-...]..---- GiCetiyncs ace 18 39.21 |\— 0.79 |— 0.31 |— 0.02 |— 1.12 | 38.09 | 46.80 29 |—0. 05 o= Eisciam. (<=: 1 39 39.89 |— 0.54 |— 0.40 |— 0.02 |— 0.96 | 38.93 | 47.73 20 |+0.04 a Arietis .---. 2 00 59.77 |— 0.32 |— 0.48 |— 0.02 |— 0.82 | 58.95 | 07.73 22 |-0. 02 AIC Chi gan cmiew 07 14.81 |— 0.54 |— 0.40 |— 0. 02 |— 0.96 | 13.85 | 22.59 26 |\—0. 02 yy (Oil soos cece 37 41.84 |— 0.62 |— 0.37 |— 0.02 |— 1.01 | 49.83 | 49.58 25 |—0. 01 as (Cth as eon. 2 56 37.10 |— 0.61 |— 0.38 |— 0.02 |— 1.01 | 36.09 | 44.86 |—51. 23 |+-0. 01 Oct. 29 |e Piscium.....| 0 57 21.52 |— 0.56 |— 0.42 |— 0.11 |— 1.09 | 20.43 | 27.48 |—52. 95 |+-0. 03 Polaris..-~2: 1 13 58. 10 |4-34.16 |—13. 37 |— 4.64 |416.15 | 14.25 | 21.42 |........|..--.. @ Ceti... <=2- 18 41.13 |— 0.79 |— 0.33 |— 0.11 |— 1.23 | 39.90 | 46.83 |—53.07 |—0. 08 7 Fiscium....- 25 41.87 |— 0.45 |— 0.46 |— 0.11 |— 1.02 | 40.85 | 47.82 |—53.03 |—0.03 o Piscium..... 89 41.82 |— 0.54 |— 0.43 |— 0.11 |— 1.08 | 40.74 | 47.79 |—52. 95 |-L0. 06 B Arietis..---- 1 48 38.22 |\— 0.36. /— 0.49 |— 0.12 |— 0.97 | 37.25 | 44.29 |—52. 96 |--0. 05 @ Arietis..-..- 2 01 01.80 |— 0.328 |— 0.51 |— 0.12 |— 0.95 | 00.85 | 07.83 |—53.02 | 0.00 © Cehlee= ste ee 2 07 16.86 |— 0.55 |— 0.43 |— 0.11 |— 1.09 | 15.77 | 22.69 |—53.08 |—0. 05 Oct. 31 | y?-Ur. Min.,S.P.) 3 21 49.73 |— 3.19 |+ 0.46 |— 0.03 |— 2.76 | 46.97 | 53.37 |..-.---.|------ Gp db sea 40 57.57 |\— 0.30 |— 0.41 |+ 0.01 |— 0.70 | 56.87 | 03.40 |—53.47 |-+-0. 01 GMP CIRC cee 3 47 10.70 |\— 0.16 |— 0.45 |+ 0.01 |— 0.60 | 10.10 | 16.65 45 |+0.03 y Tauri-.----. 4 13 35.17 |— 0.43 |— 0.37 |+ 0.01 |— 0.7 34. 38 | 40.91 47 |+0.01 e Shamans to... 22 13. 42 |— 0.38 |— 0.39 |+ 0.01 |— 0.76 | 12.66 | 19.11 55 |—0. 07 ORE We ily ee ae ee 29 39.24 |\— 0.42 |— 0.38 |+ 0.01 |— 0.79 | 38.45 | 44.94 51 |—0. 03 9 Camelop .--- 42 31.67 |+ 1.15 |— 0.86 |+ 0.02 |+ 0.31 | 31.98 | 33.51 |..-...-.|.----- t ‘Aurige ----- 49 45,22 \— 0.13 |— 0.46 |+ 0.01 |— 0.58 | 44.64 | 51.16 48 0. 00 11 Orionis~- ---. 58 19.60 — 0.43 |— 0.37 |+ 0.0L |— 0.79 | 19.01 | 25.55 46 |-40. 02 e Ur.Min.,S.P.| 4 59 44.67 |— 6.59 |+ 1.49 |— 0.07 |— 5.17 | 39.50 | 46.04 |........|.----- GB Orionis. ....| 5 09 26.47 |— 0.77 |— 0.27 |4+ 0.01 |— 1.03 | 25.44 31.97 |—53. 47 |--0. 01 The following tables show the corrections and rates of the chronom- eters used at Ogden and of the clock at the Naval Observatory, Washington, De: CHRONOMETER AT OGDEN.—NEcus, No. 1511. Date Local sidereal | Correction of chro- | Adopted hourly < time. nometer. rate. 1874, h. he. m. 8. Gh, Oct. 15 23. 40 — 0 06+ 17.120 + 0. 0533 48 Signals sent from— Oct. 15, 1874: Washington ; Washington Oct. 20, 1874: Washington Oct. 29, 1874: Washington ; Oct. 31, 1974: Washington ; Ogden ASTRONOMY. CHRONOMETER AT OGDEN.—Necus, No, 1491. Local sidereal ik Adopted hourly Means. 47. - 410 - 416 639 Date. ‘aay Correction of cloc aig. 1874. h. h. m. 8. Te Oct. 16 23. 23 — 0 06 02.660 + 0.0891 Oct. 17 19. 20 04. 260 + 0.0917 Oct. 20 22.08 08. 883 + 0.0634 Oct. 29 23. 81 22.742 + 0.0367 Oct. 31 00.58 —0 06 24.530 + 0.0367 CLOCK AT WASHINGTON.—KEssELs. Local sidereal Bs . _ | Adopted hourly Date. Famed Correction of clock. sate: 1874. h. m. 8. 8. 8. Oct. 15 1 40 — 49.717 + 0.006 — 0.040 Oct. 16 1 40 — 49.926 + 0. 0C6 + 0.026 Oct. 20 50 — 51.240 + 0.008 + 0.004 Oct. 29 2 00 — 53. 025 + 0.013 — 0.042 Oct. 3 Bes!) — 53.480 + 0.008 — 0.003 Final results of longitude. Mean of sig- . +p ES © Recorded Time-correc- Corrected |Difference of/2 5 at— nolepenvand tions. time. longitude. BES kh. m. 8. he ane, ‘a. hm. 8 hem. 8. 3. Ogden .----- 23 24 10.829 |— 0 06 17.115 |23 17 53.714 Washington } 1 38 30.526 |— 0 00 49.719 | 1 37 40.807 |2 19 47.093 Ogden .----- 23 45 10.526 |— 0 06 17.182 |23 38 53.394 Washington | 1 59 30.700 |— 0 00 49.710 | 1 58 4v. 990 47. 596 Orden! =-=—- 23 23 09.199 |— 0 06 02.664 /23 17 06.535 Washington | 1 37 44.204 |— 0 00 49.985 | 1 36 54.219 47. 684 Ogden .----- 23 47 02.271 |— 0 06 02.696 |23 40 59.575 Washington | 2 01 36.707 |— 0 00 49.995 | 2 00 36.712 47.137 | 0.547 Ogden ..-.-. 23 36 26.592 |— 0 06 08.973 |23 20 17. 619 Washington | 1 50 56.541 |— 0 00 51.240 | 1 50 05.301 47. 682 Ogden .-.---- 0 06 01.137 |— 0 06 09.003 |23 59 52,134 Washington | 2 20 30.526 |— 0 00 51.242 | 2 19 39.284 47.150 | 0.532 Ordens==-s5 0 25 18.561 |— 0 06 22.760 | 0 18 55. 801 Washington | 2 39 36.161 |— 0 00 53.000 | 2 38 43.161 47. 360 Ogden ...-.. 0 32 31.852 |— 0 06 22.765 | 0 26 09. C87 : Washington | 2 46 49.998 |— 0 00 52.993 | 2 45 57.005 47.918 | 0,558 Ogden ----.-- 1 17 19.526 |— 0 06 24.552 | 1 10 54.974 Washington | 3 31 36.159 |— 0 00 53.480 | 3 30 42. 679 47.705 Ogden .----. 1 24 09.350 |— 0 06 24.556 | 1 17 44,794 Washington | 3 38 25.464 |— 0 00 53.480 | 3 37 31.984 /2 19 47.190 Ogden west of Washington Reduction to center of dome gh 19m 475,452 08.040 . 2h 19m 475,492 0.515 ]2 19 47. 448 LATITUDE DETERMINATIONS. 49 Observations and computations for latitude. OGDEN, UTAH. Level. Corrections, Number | Microm. Half-sum of : Date. of star. | readings. Remarks. declination. Niserom Latitude. N. Sh al ween Level. 1874. teas d. d. ORE ow UE AOS AS met September 28. 6470 | 10 43.5 | 30.0 | 20.0 6534 | 28 98.0 | 25.0 | 26,0 41 03 30.3 |+ 9 35.4 |+2.5 | 41 13 08,2 6553 | 18 99.0 | 22.0 | 30.0 6659 | 13 26.0 | 38.0 | 15.0 10 07.7 |+ 2 57.8 |4+4.1 09. 6 6698 | 29 15.0 | 23.0 | 30.0 6721 8 69.0 | 34.0 | 19.0 02 33.4 |4+10 36.8 |4+2.2 12.4 6777 | 24 88.0 | 20.0 | 34.0 6799 | 17 55.0 | 39.0 | 13.0 09 22.1 |4+ 3 45.9 |4+3.3 11.3 6830 | 18 17.0 | 39.0 | 14.0- 6851 | 22 31.0 | 20.0 | 34.0 10 58.2 |+ 2 08.4 |+3.0 09. 6 6915 | 30 10.5 | 18.0 | 35.0 6962 8 84.5 | 43.0 | 11.0 02 07.0 |4+10 59.6 |+4.1 10.7 6946 | 26 16.5 | 31.0 | 23.0 7041 | 11 25.5 | 29.0 | 25.0 05 21.3 |+ 7 42.6 [43.3 Ovae 7073 | 23 87.0 | 27.0 | 27.0 7112 | 16 28.5 | 33.0 | 22.0 09 12.1 |4+ 3 55.4 |+3.0 10.5 7194 | 26 29.0 |} 30.0 | 26.0 Gr. 3311 | 12 13.0 | 28.0 | 27.0 05 48.3 |4+ 7 19.3 |41.4 09. 0 7220 9 20.0 | 25.1 | 30.0 7320 | 25 76.0 | 34.0 | 22.0 04 33.0 |+ 8 33.8 |-+1.9 08.7 7336 | 27 49.0 | 30.0 | 26.0 03 41.2 |+ 9 27.4 |—0.3 08, 3 7462 | 18 19.0] 19.0 |} 38.0 7480 | 25 75.8] 50.0] 7.0 16 58.5 |— 3 55.4 |4+6.6 09.7 7521 | 15 69.0 | 34.0 | 23.0 7544 | 22 89.0 | 27.0 | 30.0 16 49.8 |— 3 43.4 |42.2 08. 6 7824 | 22 59.0 | 26.0 | 30.0 72843} 15 73.0 | 38.0 | 18.0 16 38.5 |— 3 33.4 |+4.4 09.5 7917 | 29 77.0 | 23.0 | 33.0 7932 7 92.0 | 41.0 | 17.0 01 44.4 |+11 17.9 |+3.8 06. 1 7972 | 15 63.3 | 23.0 | 36.0 7984 | 20 02.5] 50.0] 9.0 10 46.9 |+ 2 16.2 |+7.7 10.8 a Pegasi.| 33 56.5 | 27.0 | 31.0 oCephei.| 5 98.0 | 42.0 | 16.0 40 58 48,3 |+14 15.9 |+6.0 10.2 September 29. 6553 |- 20 35.5 | 22.0 | 28.0 6659 | 14 50.0 | 27.0 | 24.0 41 10 07.7 |+ 3 01.6 |—0.8 08.5 6698 | 29 61.5 | 17.0 | 34.0 6721 9 05.3 | 31.0 | 21.0 02 33.5 |+-10 37.9 |—1.9 09. 5 6777 | 23 46.5 | 27.0 | 25.0 6799 | 16 13.8 | 23.0 | 28.0 09 22.2 |+ 3 47.3 |-1.0 08. & 4 asT 50 ASTRONOMY. Observations and computations—Continued. OGDEN, UTAH. . Level. Corrections. Number | Microm. * Half-sum of . Date. of star. | readings. Remarks. declination.| yFi¢r9m L a TEEE: N. iS aad rete evel. A ems WL ee | i Sa fy! 1874. a d. d. d. fo) ‘ ut i a“ a“ co ‘ “ September 29. 6830 | 16 75.0 | 23.0 | 28.0 6851 | 20 93.5 | 29.0 | 22.0 41 10 58.3 J+ 2 09.8 |40.5 | 4113 05.6 6915 | 29 93.5 | 29.0 | 22.0 6962 8 60.3 | 22.0 | 22.0 02 07.1 |4+11 01.8 | 0.0 08.9 6986 | 27 36.5 | 26.0 | 26.0 7041 12 40.3-|-25.0 | 24.0 05 21.4 |4 7 44.1 |41.1 | 06. 6 7073 | 22 68.0 | 23.0 | 29.0 7112 | 15 06.5 | 30.0 | 23.0 09 12.3 |+ 3 56.3 |40.3 08. 9 7194 | 26 38.0 | 24.0 | 29.0 Gr. 3311 | 12 72.5 | 29.0 | 24.0 05 48.4 |+ 719.2} 0.0 07.6 7290 7 04.0 | 20.0 | 33.0 7320 | 23 61.5 | 33.0 | 20.0 04 33.2 |+ 8 34.3 0.0 07.5 7336, | (25 3120) ))----22)\.2--=- 03 41.4 |+ 9 26.8) 0.0 08. 2 7398 | 24 06.5 | 29.0 | 25.0 7402 | 15 67.0 | 20.0 | 34.0 08 49.7 |+ 4 20.5 |}-2.8 07.4 7462 | 18 46.5 | 24.0 | 30.0 R.C.5252 | 19 46.5 | 29.0 | 26.0 13 38.5 |— 0 31.1 —0.8 06. 6 7521 15 91.8 | 36.0 | 19.0 7544 | 23 02.0 | 18.0 | 37.0 16 50.0 |— 0 40.7 —0.6 08.7 7c02 | 20 56.0 | 31.0 | 25.0 7681 19 72.0 | 20.0 | 35.0 12 46.6 |+ 0 26.1 —2.5 10.2 7824 | 22 88.0 | 30.0 | 26.0 7243 | 16 14.0 | 24.0 | 32.0 16 38.7 |— 0 29.4 —1.1 |} 08. 2 7917 | 29 48.5 | 24.0 | 32.0 05 35.1 |+ 7 31.8 —1.1 / 05.8 7932 | 13 88.0 | 25.0 | 31.0 13 40.8 |— 0 32.8 0.5 07.5 7962 | 14 92.5 | 30.0 | 26.0 7972 17 11.3 | 25.0 | 31.0 7984 | 21 70.5 | 27.0 | 28.0 10 47.1 |+ 2 22.6 —1.9 07.8 7994 15 80.5 | 32.0 | 23.0 8023 | 24 71.0 | 20.0 | 35.0 17 45.7 |— 4 36.4 —1.6 07.7 a Pegasi.| 33 35.0 | 47.0] &0 o Cephei- 5 51.0] 2.0 | 53.0 40 58 48.5 |4+14 23.8 |-3.3 09. 0 September 30. 7521 | 15 61.5 | 37.0 | 18.0 7544 | 22 73.0 | 15.0 | 40.6 41 16 50.1 |— 3 40.8 |—-1.6 07.7 7602 19 37.0 | 23.0 | 33.0 | 7631 18 63.0 | 30.0 | 25.0 12 46.9 |+ 0 23.0 |—1.4 08.5 7765 | 25 60.8 | 34.0 | 26.0 | 7803 | 12 51.0 | 22.0 | 33.0 06 22.0 |4+ 6 46.3 | 9. 2 | 06.1 LATITUDE DETERMINATIONS. or — Observations and computations—Continued. OGDEN, UTAH. Level. Corrections. Number | Microm. Half-sum of : Date. ef star. | readings. Remarks. | declination. Micnai Latitude, N. Ss. oaGlRES Level. 1874. A d. d. d. (o),. if “ 1 “ u" o7 “W September 30- 7824 | 21 59.5 | 17.0 | 38.0 7843 14 77.0 | 39.0 | 15.0 41 16 38.9 |— 3 31.7 |-+0.8 | 41 13 08.0 7917 29 48.5-| 24.0 | 32.0 05 35.6 |-+ 7 31.8 |—1.1 06.3 7932 13 88,0 | 25.0 | 31.0 13 41.5 |— 0 32.5 |—0.6 08. 4 7962 14 92.5 | 30.0 | 26.0 7972 16 29,0 | 23.0) | 33.0 7984 | 20 92.0 | 26.0 | 30.0 10 47.3 |+ 2 23.6 |—3.8 Ona a Pegasi.| 33 36,5 | 34.0 | 22.0 o Cephei. 5 65.5 | 20.0 | 36.0 40 58 48.8 |+14 20.6 |—1.1 08.3 October. .... 7290 | 7 13.5 | 20.0 | 26.0 7320 | 23 69.0 | 29.0 | 27.0 41 04 33.6 |+ 8 33.6 |+1.7 08. 9 (a00)||Pa25 So,00|Recee.)|hocste. 03 41.7 |-+ 9 25.1 |4+1.7 08.5 7398 | 23 77.0 | 26.0 | 30.0 7402 15 42.0 | 30.0 | 26.0 08 50.2 |-+ 4 19.1 0.0 09.3 7462 Ue Bo!) || 230) ]) Bw) R. C. 5252 18 57.0 | 32.0 | 25.0 13 39.0 |— 0 31.2 |+0.6 08. 4 7521 18 71.0 | 34.0 | 23.0 7544 | 25 90.0 | 25.0 | 32.0 16 50.5 |}— 3 43.1 |41.1 08.5 7602 19 54.3 | 50.0] 8.0 ; 7681 18 85.0] 9.0 | 49.0 12 47.2 |+ 0 21.5 |4+0.5 09.2 7765 | 26 12.8 | 27.0 | 30.0 7803 13 11.0 | 33.0 | 25.0 06 22.3 |+ 6 44.0 |41.4 07.7 7824 | 21 92.0 | 29,0 | 29.0 7843 15 08.0 | 31.0 | 26.0 16 39.3 |— 3 32.2 |41.4 08.5 7917 | 27 83.0 | 30.0 | 27.0 05 36.0 |-+ 7 32.5 |—1.1 07.4 7932 12 15.8 | 33.0 | 24.0 13 41.8 |— 0 33.8 |4+0.5 08.5 7962 13 24.5 | 25.0 | 32.0 7972 16 71.8 | 20.0 | 36.0 7984 | 21 19.5 | 39.0 | 17.0 10 47.8 |+ 2 18.9 |+1.9 08. 6 7994 16 17.0 | 34.0 | 23.0 8023 | 24 75.0] 3.0] 54.0 17 46.1 |— 4 26.2 |—10,0 09.9 a Pegasi.| 33 48.0 | 40.6 | 16.0 o Cephei. 5 80.0 | 16.0 | 40.0 40 58 49.2 |+14 18.8] 0.0 08. 0 October 5. .... 7073 | 22 51.2 } 29.0 | 16.0 7112 | _ 14 97.C } 19.0 | 26.0 41 09 13.0 |4+ 3 54.0 |+1.7 08.7 7194 26 69.5 | 18.0 | 28.0 Gr. 3311 12 87.0 | 30.0 | 16.0 05 49.2 |+ 7 18.6 |41.1 08. 9 7290 6 17.0 | 20.0 | 26.0 7320 22 75.0 | 26.0 | 20.0 04 34.1 |4+ 8 34.4 0.0 08.5 7336 CARAT oleae -- oa] HES |e |< ee y? Sagittarii ...... .... SK || 2S [bone||se5e|sesc|less Groombridge 3241..|-.--.).--. S€ |oses||asos | Sagittarii .... ..--.. S| ES |seca|| BS) leeere [ler CON ose ee Ae peeose 2 | SS I) Se I SK SK decee 7, werpentis./.<---.---- sce! 24 lleacslecasl< lecealll 72 ZAGtehatl 23 e5ee— cose EES Mallrese ea OS lesa = il AGUNG sao asa5 Gasone soee|| 29 |fenos|lecss|[sscallteco||] (a CHa oo55 sone Seee|sece||sone||Saa6l easel ix a sacl 2 leeecllaacallasaal| P< ||) WN Brnvenie socenoneeallesce j----|----|----]----| X B S54)) 24 tessa easclssee|| S<0||ror Oh ein SaaS ae= eee SEG s45||s2e8||eoce||Se5e 50 Draconis -.-...----- soa] SS llsosalledaajlosael|aSo WW Ge ANT Sone eso eee An eel See eeee) bse l>xs SAGES. coeco noncellsros|fonon acdeleooelisasell SX |) G) /Actetais 522 cseelleses||Ssee SE Bae (By. Observations and reductions for time taken at sending station. BEAVER, UTAH, AUGUST 13, 1872. a. | | I Name of star. 7 Aa. Bb. Ce. ae AR. AT. 5 Tie. | 8. 5: 8. 8. We Gite 08 hem. 8. hizpien Ss W.| a Scorpii .-----.--|18 44 17.79 |4+ 1.54 |— 0.12 |— 0.42 /18 44 18.79 |16 22 35.30 |—2 22 43.49 Wi |tGuOphivuehita==--- 52 51.54 |+ 1.15 |— 0.37 |— 0.5: 52 51.93 30 08.19 43.74 W.| 7 Herculis -.-.-... 19 01 16.70 |\— 0.03 |— 0.10 |— 0.50 |19 01 16.07 38 31.82 44, 25 W.| « Ophiuchi ....... 14 21.93 |+ 0.74 0.00 |— 0.39 14 22.28 51 38.03 44.25 W.|d Herculis----.-... 19 38.82 |+ 0.15 |+ 0.09 |— 0.46 19 38.60 56 54.13 44, 47 W.| a Herculis -...-.. S31 33.94 |+ 0.64 |+ 0.16 |— 0.40 31 34. 34 |17 08 50. 22 44,12 W.| 44 Ophiuchi ...-.-..- 41 18.17 |+ 1.47 |4+ 0.13 |— 0,41 41 19.36 18 35.15 44,21 W.| 8 Draconis.-.-. .-. 50 19.50 |— 0.59 |4+ 0.03 |\— 0. 50 18.32 27 34.08 44,24 W.|'@ Draconis... --.- 20 00 31.35 |— 2.16 |4+ 0.02 |— 1.06 [20 00 28.15 37 44.20 43.95 W.! » Draconis........ 07 03.30 |— 2.77 0.00 |— 1.25 06 59. 28 44 15.36 43, 92 W.| y Draconis.....-.- 16 25.08 |— 0.55 |+ 0.28 |— 0.60 16 24.21 53 39.96 44, 25 W.| 7° Sagittarii-....-..| 20 20.44 |+ 1.64 |+ 0.15 |— 0.44 20 21.79 57 37.38 44, 41 W.| | Sagittarii....... 28 52.12 |+ 1.38 |+ 0.16 |\— 0.41 28 53.25 |18 06 08.60 |\—2 22 44.65 —2 22 44.15 NORMAL EQUATIONS. + 13.00 d¢«— 1.73 a=+ 1.20 dt = — 08.15 — 1.73 dt + 10.55 a=— 15.838 a =— 18.52 Adopted error of collimation (from previous observations), ¢ = -+ 08.33. 62 ASTRONOMY. Observations and reductions for time taken at sending station—Continued. BEAVER, UTAH, AUGUST 13, 1872. S, I Name of star. Mt Aa. Bb. Ce. 1: AR. AT. 5 : hm. 8. 8. 8, 8. [Petits & hm 8. hm 8 W.!| y Aquila ..-..---.|22 02 56.78 |4 0.12 |+ 0.42 |— 0.39 [22 02 56.93 |19 40 12.54 | 2 22 44.39 Wel @: Boies 2 525esssa 07 18.87.|4+ 0.08 + 0.45 |— 0,39 07 19.01 44 34.39 44. 62 W. |e Draconis-------- 11 26.19 |+ 0.20 |— 1.33 |— 1.11 11 24.95 48 38.76 45.19 WY ll oe Jape) sossose5 20 39.90 |+ 0.04 |+ 0.46 |— 0.39 20 40, 01 57 55. 36 44. 65 W.. | a .Capricorni -- ---- 42 46.20 |— 0.04 |-+ 0.77 |— 0.40 42 46.53 |20 20 02.02 44,51 Weite Delphini-=--=-- 49 52.66 |— 0.10 |+ 0.42 |— 0.39 49 52.59 27 08. 00 44.59 W.| a Cygni .----. --.- 59 51.63 |— 0.21 |— 0.15 |— 0,54 59 50.73 37 06.38 |—2 22 44.35 —2 22 44.61 NORMAL EQUATIONS. + 7.00 dt — 1.19 a=— 3.24 ot = — 08.61 —1.19 dt + 4.33 a= — 3.08 a= — 08.88 Adopted c= + 05.38. BEAVER, UTAH, AUGUST 15, 1872. I Name of star. it, Aa. Bb. Ce. ave AR. AT. a si fb 8. 8. 8. hm. 8 lO Bb hems) 18: Wai Ophinchiiees=-2. 18 52 53.36 |+ 1.56 |— 0.14 |— 0.46 |18 52 54.32 /16 30 08.17 |—2 22 46.15 W..| 7 Herculis'.... ...- 19 01 19.34 |— 0.04 |— 0.39 |— 0.59 |19 01 18.32 38 31.78 46. 54 W.| « Ophiuchi ....... 13 24.15 |+ 1.00 |— 0.30 |— 0.46 13 24.39 50 38. 00 46. 39 Wed) Bercnlis=-255. 19 41.44 |+ 0.20 |— 0.38 |— 0.54 19 40.72 56 54. 09 46. 63 Wala) Herenlise == 525) 31 36.44 |+ 0.86 |— 0.38 |— 0.47 31 35. 45 {17 08 50.18 46. 27 W.| 44 Ophiuchi - ...--. 41 19.7 |+- 1.99 |— 0.15 |— 0.49 41 21.09 18 35.13 45. 96 W208) Draconise--se2e- 50 22.29 |— 0.80 |— 0.64 |— 0.73 50 20.12 27 33. 99 46.13 Wala) Draconiseess eee 20 00 35.27 — 2.91 |— 1.05 |— 1.26 )20 00 30.05 37 44. 07 45.98 W.! y Draconis..-.. 07 07.68 |— 3.73 |— 0.92 |— 1.48 07 01.55 44 15.25 46. 30 W.| y Draconis... 2 16 28.02 \— 0.74 |— 0.358 |— 0.72 16 26.18 53 39.92 46. 26 W.| 7? Sagittarii...-.-- 20 21.84 |+ 2.21 |— 0.05 |— 0.52 20 23.48 57 37.36 46.12 W.| Sagittarii...---. 28 53.60 |+ 1.87 |— 0.14 |— 0.48 28 55.05 {18 06 0x. 59 46. 46 W.!7 Serpentis -.---.-. 37 28.69 |+- 1.35 |— 0.22 |— 0.45 37 29. 37 14 438. 03 46. 34 Wray “Aquilssya-222 e522 51 02.08 |+ 1.52 |— 0.28 |— 0.46 51 02. 86 28 16. 46 46. 40 Wilber Wbipreaostcencecoe 5d 25.46 \— 0.04 |— 0.85 |— 0.59 50 23. 9& 32 38.12 45. 86 Vivie| lee 20a ne iS ae eoane 21 08 10.18 |-+ 0.21 |— 0.75 |— 0.53 21 08 09.11 45 23.11 46. 00 W.| 50 Draconis -.-.-.-..- 13 27.47 |— 4.78 |— 2.00 |- 1.79 13°18. 90 |18 50 32.48 |—2 22 46. 42 —2 22 46,26 NORMAL EQUATIONS + 17.00 dt+- 013a—=— 4.42 dt — — 03.26 + 0.13 dt + 15.98 a= — 32.78 a =— 28.05 ce derived from 50 Draconis, clamp E. and W., to be = + 05.45, TIME DETERMINATIONS. 63 Observations and reductions for time taken at sending station—Continued. BEAVER, UTAH, AUGUST 15, 1872. 45. 79 —2 22 46.70 2 22 46.09 e & Name of star. T Aa. Bb. Ce. S) a 3 8. 8. 8 : aes 8s W.| a? Capricorni...... 22 33 44.49 |+ 1.09 |— 0.05 |— 0.47 |22 33 45.06 [20 10 59. 41 W.| = Capricorni...... 42 46.86 |+ 1.21 |— 0.05 |— 0.48 42 47.54 20 02. 02 W.| e Delphini... 2 49 53.96 |-+ 1.05 |— 0.09 |— 0. 46 49 54. 46 27 08. 00 Wj a. ‘Cypnilc.- 59 53.66 |— 0.23 |+ 0.06 |— 0.63 59 52. 86 37 06,41 W.| w Aquarii-.... -/23 08 32.38 |+ 1.03 |+ 0.07 |— 0.46 |23 08 33,02 45 47,23 iWeltwe Oyonite te. ee 15 13.52 |— 0.07 |+ 0.20 |— 0.59 15 13.06 (20 52 26.36 NORMAL EQUATIONS. + 6.00 dt — 3.00 a—=+ 3.51 ét = — 08,09 — 3.00 dé + 2.89 a—=— 4.20 a =— 15.36 e adopted = + 03.45. BEAVER, UTAH, SEPTEMBER 6, 1872. e& e EI Name of star. as Aa. Bb. Ce. aT; AR. 5 hem: 1: 8. 8. ie he an.) :8: hem. 8 W.| 7, Draconis....---. 21 41 06.14 |— 0.39 |— 1.13 |— 1.04 |21 41 03.58 |19 18 01.86 W.| « Aguile - 53 04.47 |-+ 0.15 |— 0.28 |— 0.31 53 04.03 30 02.27 W.| y Aquilw ........./22 03 14.78 + 0.10 |— 0.27 |— 0.31 |22 03 14.30 40 12.35 Wrayjce Aqnilson see =e 07 36.65 |-+ 0.10 |— 0.26 |— 0.31 07 36.18 44 34.21 Wee -Draconises. 5. 10 41.75 — 0.31 |— 0.58 |— 0.88 10 39.98 47 37.75 Wallttae Aquileat sco: 21 57.62 |-+ 0.10 |— 0.38 |— 0.31 21 57.03 58 55. 21 W..| a? Capricorni...... 34 01.€9 |+ 0.16 |— 0.13 |j— 0.31 34 01.41 /20 10 59.32 W.| x Capricorni...... 43 04.21 |+ 0.18 |— 0.12 |— 0.32 43 03.95 20 01.95 Walter Cronies cose. 22 00 08.92 |— 0.03 |— 0.28 j— 0.42 |22 00 08.19 [20 37 06.18 + 9.00 dt — 0.25a—=+0.51 — 0.25 dt + 9.16 a= — 1.85 NORMAL EQUATIONS. e adopted = + 05.30. ot = + 08.05 a = — 03,20 AY: hom. 8. —2 23 01.72 01.76 01. 95 01. 97 02. 23 01. 82 02. 09 02. 00 —2 23 02.01 —2 23 01.95 64 ASTRONOMY. Observations and reductions for time taken at receiving station. SALT LAKE CITY, AUGUST 13, 1872. e Name of star. TT Aa. Bb. Ce. Te: AR. AL: 3 hm 8 8. ae a lis Glo hem. _ 8. h. m. E.| a Ophiuchi --....-/17 29 50.46 |— 0.01 |+ 0.07 |— 0.02 /17 29 50.50 /17 29 01.24 —0 00 49. 26 E. | @ Draconis......--| 38 33.72 |-+ 0.04 |4+ 0.20 |— 0.06 38 33.90 37 44,21 49, 69 BE. | # Herculis------.. 42 17.98 |— 0.01 |+ 0.05 |— 0.02 42 18.00 41 28.61 49, 39 E. | y Draconis -..-.-- 54 29.32 |-+ 0.01 |+ 0.03 |— 0.03 54 29.33 53 39.97 49, 36 E. | / Sagittarii....--. 18 06 58.16 |— 0.03 0.00 |— 0.02 |18 06 58.11 |18 06 08.61 49.50 W.| 0 Aquile.......-. 20 05 33.50 j— 0.02 0.00 |-+ 0.02 [20 05 33.50 |20 05 44,24 49, 26 W.| a? Capricorni --.--- 11 48.94 |— 0.02 |— 0.01 |4 0.02 11 48.93 10 59. 42 49.51 W.| x Capricorni ------ 20 51.60 |— 0.03 0.00 |-+ 0.02 20 51.59 20 02.03 49. 56 W. Groombr. 3241...| 31 25.24 |+ 0.05 |+ 0.11 |+ 0.08 31 25. 48 30 36.13 49.35 Waltan Cyentie nas -- 38 55. 90 0.00 |+ 0.13 |+ 0.03 38 56. 06 38 06. 42 49. 64 W.| uw Aquarii 20 46 36.74 |— 0.02 |+ 0.01 |+ 0.02 |20 46 36.75 120 45 47.24 | 0 00 49.51 —0O 00 49.45 NORMAL EQUATIONS. 0 = — 0.02 + 11.00 dt A7a— 1.15¢ ét= 08.00 0=+0.26-+ 1.47 dt 40a+ 0.06c¢ a =— 0.031 0=+4+ 0.74— 1.150dt .06 a + 30.45 ¢ c =— 08.024 SALT LAKE CITY, AUGUST 15, 1872. Be E Name of star. 7; Aa. Bb. Ce. rm AR. ISDE S hm. 8. 8. oe a hm. 8 hm. 8 (Sos eS BE. | « Ursx Minoris.---|17 00 04.60 |— 0.07 |+ 0.11 |4+ 0.13 |17 00 04.77 |16 59 12.25 |—0 00 52.52 |p erculisg =e 09 42.58 + 0.01 |+ 0.04 |+ 0.02 09 42.65 {17 08 50.18 52. 47 E. | a Ophiuchi -.-.-.--. 29 53. 64 0.00 |+ 0.01 |+ 0.02 29 53. 67 29 01.18 52. 49 Be | a) Draconis:—---- -- 38 36.56 — 0.02 |+ 0.05 |+ 0.05 38 36. 64 37 44.10 52.54 W.| w Draconis....---- 45 07.80 |— 0.02 |+ 0.11 |— 0.05 45 07.84 44 15.25 52.59 W.| y Draconis.-.---- -.- 54 32.32! 0.00 |4+ 0.03 |— 0.03 54 32.32 53 39.91 52.41 W.| 2 Sagittarii .....-- 18 07 01.00 + 0.01 |+ 0.01 |— 0.02 |18 07 01.00 |18 06 08.59 52. 41 W.| 7 Serpentis -.----- 15 35.58 |— 0.01 0.00 |— 0.01 15 35.58 14 43.03 52. 55 He |e) Cephet-----.--- 20 14 05.97 — 0.04 |4+ 0.18 |4+ 0.08 )20 14 06,19 )20 13 13.71 52. 48 E. | « Capricorni..---. 20 54.58 + 0.01 |+ 0.00 |4+ 0.02 20 54. 61 20 02.03 52.58 E. |e Delpbini..---... 28 00.58 | 0.00 |4+ 0.02 |+ 0.01 28 00. 61 27 08.01 52. 60 Bs a @yenieb-s2. 2... 37 58.74 0.00 |-+ 0.07 |+ 0.01 37 58. 82 37 06. 41 52. 41 E. | Aquarii..--..-..|20 46 39.72 + 0.01 |+ 0.03 |4+ 0.02 |20 46 39.78 [20 45 47.24 | 0 00 52.54 —0 00 52.51 NORMAL EQUATIONS 0 =— 0.06 + 13.00 dt— 6.26a+ 14.34¢e 0=+ 0.14— 6.26 dt + 39.66a— 44.90¢ 0=— 1.01 + 14.34 dt — 44.90 a + 106.12 ¢ dt = — 08,01 a =-+ 08,014 e = + 9.017 TIME DETERMINATIONS. 65 Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, SEPTEMBER 6, 1872. = Name of star. T. 5 he mM 8 W.| a Lyre..----.....}18 34 05.80 Wel seeluymea St et se cos 46 50. 94 W. | 50 Draconis........ 51 58.70 We de Aguilesl sess 19 O01 01.44 W.| @ Sagittarii....--. 11 39.00 W.| 6 Draconis....-... 14 00.81 Bie 50" PAQUIlE secs =< 20 33. 04 Ibis PAO Ee enease 31 30.96 We cys eAquiley cesses a2. 41 40.82 E. | e Draconis........ 50 06. 60 BE. | 7 Aquilw ...-.. Seal| BY) PEGs KE. | « Capricorni ..-.-. 20 21 30. 38 W. « Capricorni...-.-. 21 47 50. 02 W | 79° Draconis... --. -- 52 48. 06 Wee) “Aquaril----22-- 22 00 43.15 Writ@) Agquarile.ss-2 --- 11 35.53 | ++1444 14441441 D 1 6.0 1.04 dt-+ 15.37a 411.746 9.93 dt + 11.74a + 56.21 ¢ Aa. Bb. Ce. 7: AR. 8. oe oh hem 8. lop Git a 0.00 |— 0.01 |+ 0.18 /18 34 05.97 |18 33 37.69 0. 00 0.00 |+ 0,17 46 51.11 46 22.75 0.05 |-+ 0.10 |+ 0,55 51 59. 30 51 30.79 0.01 |-+ 0.01 |+ 0.14 /19 01 01.60 |19 00 33.24 0. 02 0,00 |-+ 0,15 11 39.17 11 10.77 0.02 |— 0.05 |+ 0.36 14 01.10 13 32. 85 0.01 0.00 |— 0.13 20 32. 92 20 04.50 0.01 |\— 0.08 |— 0.14 31 30.80 31 02,27 0.01 0.00 |\— 0.14 41 40. 69 41 12.35 0.03 |+ 0.10 |— 0.36 50 06. 31 49 37.75 0.01 |+ 0.01 |— 0.13 59 23. 55 58 55. 21 0. 02 0.00 |— 0.15 |20 21 30.25 |20 21 01.95 0.02 |— 0.04 |+ 0.14 [21 47 50,14 |21 47 21.49 0.03 |-+ 0.03 |+ 0.48 52 48, 54 52 20.14 0.01 0.00 + 0.14 22 00 43.30 )22 00 14.93 0. 02 0.00 + 0.14 | 11 35.69 11 07.17 NORMAL EQUATIONS. Odt-+ 104a— 9.98 ¢ dt = — 08.01 a =-+ 05,022 e =— 085.139 The following tables show the corrections and rates of the eters used at Beaver and Salt Lake City: CHRONOMETER AT BEAVER.—Nz«us, No. 1499. Local side- real time. Correction of chro- nometer. Adopted 1872. Aug. 13 Aug. 15 Sept. 6 h. 18. 50 18.50 20. 00 he m. 8. —2 22 44.35 46.19 01, 94 &. + 0.058 + 0. 025 + 0.010 hourly rate. CHRONOMETER AT SALT LAKE CITY.—Negus, No. 1511. Local side- Pate, real time. “1872. h. Aug. 13 20. 00 Aug. 15 20. 00 Sept. 6 20. 00 Correction of chro- nometer. Adopted hourly rate. 5 AST —0 01 28. 52 —0 01 28.41 chronom- 66 ASTRONOMY. On August 13 and 15, the mean-time chronometer Barraud, No. 22961, was used at Salt Lake City for exchanges. The following comparisons were made with Negus, No. 1511: 1872. ipavipe EDs h. m So hm. 8. (a i> | EF Aug. 13 | Barraud..-| 11 44 02.5 | 11 49 59.5 | 10 13 05.0 | 10 16 12.5 Negus -.---- 19 44 48.0 | 19 50 46.0 | 18 13 35.0 | 18 16 43.0 Aug. 15 | Barraud.-.-.| 10 09 52.5 | 10 12 49.0 | 11 56 30.0 | 11 59 29.5 Negus. -..-- 18 18 34.0 | 18 21 31.0 | 20 05 30.0 | 18 08 30.0 From these comparisons, the corrections and rates for Barraud, 22961, are derived as follows: Time of Correction of Date. Barraud. Barraud. Hourly rate. 1872. h. h. m. 8. 8. Aug. 13 11. 7836 +7 59 56.57 — 10.165 Aug. 15 11. 9666 +8 08 07.73 — 10.340 Final results of longitude. 1o 2 2 : Mean of sig- “| 3 Sen Signals sent ©=_| Time-correc- | Corrected | Difference [-+| .. Recorded at— | nalssentand Z : 5 o| 2 from— Saosin tions. time. of longitude. a 7 ee lacs! August 13,1872: 5 5 ans Ge hm. 8. hom. 8. hm 8 8. 3. i ma City alt Lake City.| 11 06 25.48 | + 7 59 49.69 | 19 06 15.17 Salt Lake City} | Reaves 21 25 59.98 | — 2 22 44.38 | 19 03 15.60 | 0 02 59.57 Baawen ; Salt Lake City.} 11 12 59,22 | + 7 59 50.81 | 19 12 50.03 pire Beaver ........ 21 32 34.97 | — 2 22 44.39 | 19 09 50.58 59. 45 |....|59.510 August 15, 1872: <|[aa|leclfaciiecteal| (6 (ifs etl pesocse seep cose|e-|Px|le lle ap 4)|=4) [a= BmPATICIS fee emninaai= sla all se}foe| S45 |eelEalleal Pxllss] eal Pile 50 Cassiopei@ -...-..---. cellooflec|[ea|\en|[ec|{ee|a= IP Perasil.-\-5-<< eA CONIS sem = setae = scfidefaa|feclleel[ael lea xl bel] Mth (Cea cas sa6 ease cellaclsal bal belbsIp lle: el) e @) GAG IE ecsacoseaeees sefloc|le<]colPleelec|eslecl] 2. Gey outenins a ee sealed ealbpdiedlec| ped eel oles [os AGE he eee eae eene Sle-l|-a| be Bllexe|ocliosi ci] 2G) IDRR COINS) Cases caseer||oellae| Ee) se] eeloa|focl eal \Sa| ps a) JAG TRIES Sapa eanssoso > SASSI ESIEEIPXIESIPSISSIES| Gh elo hrebat! See ee eS ee alioe|Salioe|Pips<|isalle ae a Aquila..-. =|(5a|5| Ealeaie< Ps bp<|Pl ce NG eet eee See ee es Eo ee Sllorifoe acl] e Draconis - SAIPRISAe loa DDSISAIBA| @ CObaien See ote coco baleelcal Peqee| a eal ee T Ratailes con 8 ote eee -|X|X|X]--|X<|X]X] x|X Groombridge alga). a sAb|eslSsllaal P< Observations and reductions for time taken at sending station. PIOCHE,; NEVADA, SEPTEMBER 25, 1872. ro a Name of star. a. Aa. Bb. Ce. T’. AR. (XM S) hem. 8: 8. 8. 8. iio Sh OSs GB hom. 8. W.| 6 21 42 56.05 |-- 0.57 |+ 0.15 0.00 |21 42 55.63 |19 12 31.80 |—2 30 23.83° W.| 6 49 27.18 |+ 0.26 |+ 0.05 0. 00 49 27.49 19 04, 22 23. 27 W.| « 22 00 24.95 |+ 0.32 |+ 0.05 0.60 22 00 25.35 30 02. 01 23. 34 Walle Aguile: se--s-s- 10 35.65 | 0.21 |+ 0.06 0. 00 10 35.92 40 12.07 23. 85 Wo|"en Draconisi.--- =. 19 01.15 |— 0.69 |+ 0.16 0. 00 19 00. 62 49 36.65 23. 97 KE. | « Capricorni ...... 50 25.01 |+ 0,39 |4+ 0.04 0. 00 50 25.44 |20 20 01.73 23.71 E. Groombr. 3241 .../23 00 58.38 |— 0.82 |+ 0.17 0.00 |23 00 57.73 30 34, 17 23. 56 EK. | a@ Cygni......---..| 07 29.64 |— 0.07 |+ 0.09 0. 00 07 29.66 37 05.81 23. 85 E. INGUIN See eee 16 10.61 |+ 0.34 |+ 0.04 0. 00 16 10.99 46 47.02 23. 97 E. 61 Cygni.--....-...| 31 35.62 0,00 |+ 0.08] | 0.00 31 35.70 |21 01 11.80 23. 90 E.| 1 Pegasi ......---.]| 46 35.74 |-+ 0.15 |+ 0.07 0. 00 46 35.96 16 12,11 23. 85 E. | p Cephei..-. ---| 57 26.45 |— 0.69 |+ 0.16 0. 00 57 25. 92 27 02. 40 23. 52 Drie Pegasteres.s.cn- 0 08 19.80 |-+ 0.22 |4+ 0.06 0.00 | 0 08 20.08 |21 38 56.16 |—2 30 23,92 NORMAL EQUATIONS. O0=+ 1.39 + 13.00 d¢-— 217a— 4.45¢ c= 0800 0=—5.75— 2.17 0t-+12.64a+ 2W17e a—+ 08.45 O=—0.62— 4.45 0t+ 2.1744 45.36¢ NORMAL EQUATIONS, For E.: 0=—0.10 + 5.00 dt— 2.734 0=-+ 1.46 — 2.73 dt 4-11.73 a a =— 08.14 For W.: 0=+1.924 6.00 dt— 0.754 0=— 0.88—0.75 d6t+ 4.074 a=-+ 08.16 Adopted c= — 08.06 for E. 78 ASTRONOMY. Observations and reductions for time taken at sendiug station—Continued. PIOCHE, NEVADA, SEPTEMBER 25, 1872. ey 5 Name of star. Ts Aa. Bb. Ce. ie AR. AT hm 8. 8. 8. 8. [Pi oP hm. 8. hem. 3. W.| a Andromede -.--. 2 32 12.82 |+ 0.08 |— 0.42 |+ 0.08 | 2 32 12.56 | 0 01 49.03 |—2 30 23.53 W.| y Pegasi ----..---. 37 05.23 |-+ 0.17 |— 0.27 |+ 0.06 37 05.19 06 41.29 23. 90 W. | 21 Cassiopeiz ..---- 3 07 44.52 |— 0.88 |— 0.86 |+ 0.22 | 3 07 43,00 37 19.23 23.77 Ee lie. Piscium=-2----- 26 44.11 |4+ 0.20 |— 0.25 | 0.06 26 44.00 56 20. 60 23. 40 E. | 38 Cassiopeiz ..---. 3 52 13.68 |— 0.60 |— 0.70 — 0.17 | 3 52 12.21 | 1 21 48,90 |—2 30 23.31 NORMAL EQUATIONS. 0=-+ 0.69 + 5.00 dt —2.59 a 0 =— 2.82 — 2.59 dt-++7.53 4 a=-1 03.40 Adopted c= — 0°.06 for E. PIOCHE, NEVADA, SEPTEMBER 27, 1872. = 1 I Name of star. ith Aa. Bb. Ce | 1B AR. AT. 5 hum . &. 8. 8. as h.m. 8. hm. 8 hm 8. 106 | tae PACE es oe 22 00 23.93 |\— 0.10 |+ 0.04 |— 0.06 |22 00 23.81 |19 30 01.98 |—2 30 21.88 106 || 92 FATE see pees 10 33.87 |— 0.07 |4+ 0.05 |— 0.06 10 33.79 40 12.04 21.75 Bin pes Draconis see ees 18 58.26 |+ 0.21 |+ 0.12 |— 0.17 18 58. 42 48 36.51 21. 91 Belt Aquils 22. ccsen- 28 16.98 |— 0.07 |+ 0.04 |— 0.06 23 16.89 57 54.93 21. 96 eo Cepheltnsascn=-- 43 31.77 |+ 0.40 |+ 0.18 |— 0.26 43 32.09 ,20 13 10.45 21. 64 W. Groombr. 3241 - ..|23 00 56.52 — 0.29 |— 0.17 |+ 0.18 23 00 56.24 29 34.03 22.21 W.| a Cygni 07 27.84 |— 0.03 |— 0.08 |+ 0.08 07 27.81 39 05.7 22. 05 W.}| u Aquarii 16 09.15 |-+ 0.12 |— 0.04 |+ 0.06 16 09,29 45 47.00 22.29 W.| 61 Cygni 31 33.80 0.00 |— 0.08 |+ 0.07 31 33.79 (21 01 11.77 22. 02 Weil, Cyeni-=...- : 37 53.28 | 0.03 |— 0.07 |+ 0.07 37 53.31 07 31.24 22. 07 W.| 1 Pegasi 23 46 33.99 |+ 0.05 |— 0.06 |+ 0.06 |23 46 34.04 [21 10 12.09 |—2 30 21.95 TIME DETERMINATIONS. 79 Observations and reductions for time taken at sending station—Continued. PIOCHE, NEVADA, SEPTEMBER 27, 1872. a 5 Name of star. T. Aa. Bb. Ce. ee AR. AT. 5 Z aang as 8. 8. Gh eames hm. 8. hm. 8 10 |) @) THOS oe een 2 23 08.96 |+ 0.06 |-+ 0.02 |— 0.06 | 2 23 08.98 /23 52 46.88 |—2 30 22.10 E. | a Andromede -.... 32 11.10 |+ 0.02 |4+ 0.02 |— 0.07 32 11.07 | 0 01 49.04 22. 03 KE. | 21 Cassiopeia ..---- 3 07 41.73 |— 0.24 |+ 0.06 |— 0.22] 3 07 41.33 | 0 37 19.25 22. 08 Witte, Iscimmesne1= ==: 26 42.91 |— 0.12 |+ 0.02 |+ 0.06 26 42.87 | 0 5b 20. 62 22. 25 W. | 38 Cassiopeia ..---- 3 52 10.62 |+ 0.36 |+ 0.05 |+ 0.17 | 3 52 11.20 | 1 21.48.96 |—2 30 22.24 NORMAL EQUATIONS. For E.: 0= + 0.37 + 3.00 6t — 147 4 0 =— 0.68 — 1.47 dt+ 5.1la a=+ 08.11 For W.: 0=-+ 0.25 + 2.00 dt — 0.99 a 0 = + 0.36 — 0.99 dt + 2.55 a a=— 08,24 Adopted c= — 05.06 for E. PIOCHE, NEVADA, SEPTEMBER 28, 1872. Ss 3 Name of star. ts Aa. Bo. Ce. as AR. (SNM ts) ——— i} hm 8. 8. 8. 8. hm. 8. h. m. 8. hem. 8. W.| e Draconis --..---- 22 18 58.80 |— 0.66 |— 0.12 0.00 \22 18 58.02 |19 48 36.45 |—2 30 21.57 Will) tae A Ue eer 28 16.35 |-+ 0.22 |— 0.04 0. 00 28 16.53 57 54.93 21.61 iWelce Delphini <22--.-- 57 29.01 |+ 0.20 |— 0.04 0. 00 57 29.17 |20 29 07.65 21.52 Wslhete Cysninesnss ores 23 07 27.19 |— 0.07 |— 0.07 0.00 |23 07 27.05 37 05.74 Piel W.| 2, Aquarii’--<----- 16 08.34 |+ 0.32 |— 0.03 0. 00 16 08. 63 45 46.99 21. 64 Bye Gills Cy ontiersers ere 333.00 0.00 |— 0.06 0. 00 31 33.24 |21 01 11.75 21. 49 Be len Pe cacieeecsen =e 46 33.40 |+ 0.14 |— 0.05 0. 00 46 33. 49 16 12.08 21.41 By 4: (‘Cephei-.--2---.- 57 24.68 |— 0.66 |— 0.12 0. 00 57 23.90 27 02.26 21. 64 E. | « Capricorni .---.- 0 16 42.63 |+ 0.35 |— 0.03 0.00 | 0 16 42.95 46 21.38 21.57 Beye. Aquarii(sss)---=0 49 08.16 |-+ 0.26 |— 0.04 0. 00 49 08.38 |22 18 46.73 |—2 30 21.65 NORMAL EQUATIONS. Rane EEO SOOO dee Cele 0=—2.94-+4 0.21 dt+ 6.98 a a=-+ 08.40 Adopted c= 05.00. 80 ASTRONOMY. Observations and reductions for time taken at sending station—Continued. PIOCHE, NEVADA, SEPTEMBER 28, 1872. 5 7 2 Name of star. re Aa. Bb. Ce. me AR. Ag: S) fie) ees 8. 8. 8. hom, 18. hm 8. h. m. 8: E. Groombr. 4163 ...| 2 19 65.10 |— 1.04 |— 0.12 0.00 | 2 19 03.94 [23 48 42.40 |—2 30 21.54 E.| a Andromedw....-| 32 10.66 |+ 0.09 |— 0.04 0. 00 32 10.71 | 0 01 49.04 21. 67 Belly herasiesssas-s=— 37 02.90 |+ 0.20 |— 0.04 0. 00 37 03. 06 06 41.31 21.75 W. | 21 Cassiopeiz -----. 3 07 42.40 |— 1.09 |— 0.12 0.00 | 3 07 41.19 37 19.26 ~ 21.93 Waves biscium\seeose seo 26 42.12 |-+ 0.26 |— 0.03 0. 00 26 42.35 56 20.62 |—2 30 21.73 NORMAL EQUATIONS. 0=-+ 2.70 + 5.00 dt —3.15 4 0=— 5.55 — 3.15 dt + 9.59 a a= -+ 05.50 Adopted c= 05.00. PIOCHE, NEVADA, SEPTEMBER 30, 1872. B a, 8 Name of star. T. Aa. | Bie ale ace: T’. AR. AT. 5 lie Gis 8. 8. 8. lis. Eb hem. 8. hm. 8. W.| y Aquile .....-.-.)22 10 31.45 |+ 0.61 0. 00 0.00 }22 10 32.06 |19 40 11.99 |—2 30 20. 07 W.| e Draconis . <2 18 58.65 |— 1.98 0. 00 0. 00 18 56. 67 48 36.71 19, 96 Weir eAquilsseeseeee- 28 14.33 |-+ 0. 67 0, 00 0. 00 28 15. 00 57 54.88 20. 12 W.| 7 Capricorni .--.-.| 50 20.57 |4+ 1.13 0. 00 0. 00 50 21.70 [20 20 01.66 20. 04 W.. |a (Cygni---2------- 23 07 26.16 |— 0.22 0. 00 0.00 |23 07 25.94 37 05. 69 20, 25 W.| # Aquarii ........- 16 06,18 |-+ 0.96 0.00 0. 00 16 07.14 45 46.96 20.18 Pia Ole Oxonieeee sane 31 31.88 0. 00 0. 00 0. 00 31 31.88 /21 01 11.72 20. 16 194 |e Ch eroscdgo secs 37 51.24 |+ 0.21 0. 00 0. 00 37 51.45 07 31.19 20. 26 Hil (Pepasi neces. acess 46 31. 82 |-+ 0.44 0. 00 0. 00 46 32.26 16 12.05 20. 21 in| p (Cephet ------15--- 57 24.50 |— 1.99 0. 00 0. 00 57 22.51 27 02.18 20. 33 BE. | w Capricorni..--.--) 0 16 40.46 |+ 1,05 0. 00 0.00 | 0 16 41.51 46 21.37 20.14 Deil@ Aan tS5ccce 29 34.31 |+ 0.81 0. 00 0. 00 29 35.12 |21 59 14.83 |—2 30 20.29 NORMAL EQUATIONS. 0=— 3.28-+ 12.00 d¢+1.29 4 0=—10.26+ 1.29 dt—7.82a a= -+ 18,29 Adopted ce = 08.00 TIME DETERMINATIONS. 81 Observations and reductions for time taken at sending station—Continued. PIOCHE, NEVADA, SEPTEMBER 30, 1872. a I Name of star. Te Aa. Bb. Ce. Ale AR. AT 5 — hem. 8 8. oh 8. hm 8 hm 8 lim. 8! ey iow | Cephetien ==) 1 43 48.61 |— 1.63 0. 00 0.00 | 1 43 46,98 |23 13 26.16 |—2 30 20.82 Boo) Risen. s.e se 2 23 06.61 |+ 0.68 0. 00 0.00 | 2 23 07.29 52 46.89 20. 40 E.| a Andromede..... 32 09.16 |+ 0.24 0. 00 0. 00 32 09.40 | 0 01 49.05 20. 35 E. | y Pegasi ----.----- 37 01.06 |+ 0.53 0. 00 0. 00 37 01.59 06 41.31 20. 28 W.| e Piscium..-...-.-.- 3 26 40.20 |+ 0.61 0. 00 0.00 | 3 26 40.86 56 20. 64 20. 22 W. | 38 Cassiopeia .----- 52 10.93 — 1.93 0. 00 0. 00 52 09.00 | 1 21 49,04 19. 96 W. | o —Pisciam.-_.--... 4 09 00.27 |+ 0.63 0. 00 0.00 | 4 09 00.90 38 40.78 20. 12 W.| 8 Arietis .----..--- 17 56.73 |+ 0.41 0. 00 0. 00 17 57.14 47 36.93 |—2 30 20.21 NORMAL EQUATIONS. 0=-+ 1.00 + 8.00 dt — 0.32 4 0 = — 6.48 — 0.32 dt + 5.03 a a =-+ 15.25 Adopted ¢ = 03.00. PIOCHE, NEVADA, OCTOBER 2, 1872. a . eI Name of star. ae Aa. Bb. Ce. ve AR. AD S h. ™m. 8. Bs Gy 8. h.m. 8. hm. 8. him. 8 We |e Draconis\---.---- 22 18 54.09 |+ 1.26 |— 0.06 0.00 |22 18 55.29 |19 48 36.20 |—2 30 19.09 W.| a Capricorni -. ..-. 50 21.15 |— 0.72 |— 0.01 0. 00 50 20. 42 30 01.63 18.79 Ws |e Delphint----.--- 57 26.75 |— 0.38 |— 0.02 0. 00 57 26.35 27 07.59 18. 76 Wrijia. Cyonivesone----- 23 07 24.80 |+ 0.14 |— 0.03 0.00 |23 07 24.91 |20 37 05.64 19. 27 134.) Gil CON fe ie ees cede 31 30.80 0.00 |— 0.03 0. 00 31 30.77 |21 01 11.68 19. 09 Byles Repaaiieonse----5 46 31.26 0.00 |— 0, 02 0. 00 46 31.24 10 12.02 19, 22 Brea tt Cepheleagecsee== 0 10 22.39 |— 1.34 |— 0.06 0.00 | 0 10 23. 67 40 04.71 18. 96 BE. | a Aquaril ......-.- 29 34.81 |+ 0.51 |— 0.02 0. 00 29 34. 28 59 14.81 |-—2 30 19.47 | | NORMAL EQUATIONS. 0 = — 1.00 + 8.00 dé + 1.05 a —=— 5.43 4- 1.05 dt + 6.62 a a—-+ 05,82 Adopted c = 05.00. 6 AST 82 ASTRONOMY. Observations and reductions for time taken at sending station—Continued. PIOCHE, NEVADA, OCTOBER 2, 1872. } Name of star. ABS Aa, Bb. Ca ER AR. JNA S hem.) 8: 8. 8. 8. hom: 8: hems. 18s hem, 8 E Groombr. 4163 ...| 2 18 59.51 |+ 2.06 — 0.22 0.00 | 2 19 01.35 )23 38 42.35 |—2 30 19.00 E.; a Andromed@ ..... 32 08.53 |— 0.18 |— 0.09 0. 00 32 08.26 | 0 01 49,05 19, 21 Hy. | y Pegasi ------. ---- 37 01.19 |— 0.41 |— 0.07 0. 00 37 00.71 06 41,32 19. 39 E. | 21 Cassiopeiz ...--. 3 07 36.50 |4+ 2.18 — 0.23 0.00 | 3 07 38.45 30 19229 19. 16 We \te) Pisclums-2------ 26 40.64 |— 0.51 |— 0.08 0. 00 26 40.05 56 20. 66 19. 39 W. | 38 Cassiopeiz .-.----. 52 07.16 |-+ 1.49 |— 0.19 0: 00 50 08.46 | 1 19 49. 07 19. 39 Weller bisciumerse-ee- 4 09 00.63 |— 0.49 |— 0.07 0.00 | 4 09 00, 07 38 40. 80 Ne W.| @ Arietis..-....... 17 56.64 |— 0.32 |— 0.08 0. 00 17 56.24 47 36.95 19, 29. W.| 50 Cassiopeiz .-.---- 22 55.93 |-+ 1.76 |— 0.20 0, 00 22 57.49 52 38.13 19, 36 Wr law Arietisinnssss cee 4 30 20.09 |— 0.28 |— 0.09 0.00 | 4 30 19.72 | 2 U0 00.33 |—2 30 19.39 A NORMAL EQUATIONS. 0=— 3.43-+ 10.00 dt+ 5.344 0=— 1501+ 5.34d6¢+16.194 a=+ 08,99 Adopted ¢ = 05.00. Observations and reductions for time taken at receiving station. SALT LAKE CITY, UTAH, SEPTEMBER 25, 1872. = = Name of star. is Aa, Bb. Ce. 1: AR. AT. 5 Iie Wits & 3. 8. 8. hm. 8. eM. 8: hm. 8 BH. |d@ Sagittarit ------- 19 12 06.46 |— 0.38 |— 0.02 0.00 |19 12 06.06 |19 10 10.48 | — 1 55.58 106 | O) ANGE S550 soooee 21 00.06 |— 0.26 |— 0.02 0,00 20 59.7 19 04, 22 55. 56 1D}, || 2 ANAWIE eo oSoo Bose 31 58.16 |— 0,31 |— 0.01 0, 00 31 57.84 30 02. 01 55. 83 Welly Agquilz-----.---- 42 08.12 |— 0,22 |4+ 0.02 0. 00 42 07.92 40 12. 07 55. 85 Wisin, -Aquilss =e —- 52 --- 46 29.76 |— 0.22 |+ 0.02 0.00 46 29,56 44 33.97 5509 W.|7 Aquile..---..... 59 50.84 |— 0.23 |4+ 0.03 0. 00 59 50. 64 57 54.96 55. 68 Waive, Cephei----2:2... 20 15 05.00 |4- 1.13 |-+ 0.23 0.00 20 15 06.36 |20 13 10.64 55. 72 135 || GIO foo cosnecasae 21 03 07.34 |— 0.02 |+ 0.07 0.00 \21 03 07.39 |21 O1 11.60 55. 59 105 |W Gh fo Veeeeoeeceee 09 27.30 |— 0.09 |+ 0.10 0. 00 09 27.31 07 31.27 5. 04 1 OA Ii de OF) 9) 11-) Cee 17 28.90 |+ 0.32 |4+ 0.24 0. 00 7 29. 46 15 33. 49 55. 97 106 |) {6h kahit) eon ease 26 47.48 |— 0.30 |+ 0.07 0. 00 26 47,25 24 51,44 55. 81 Dn [ite Zero So Se en 32 54.58 |— 0.32 |+ 0.06 0. 00 32 54. 32 30 58. & 55, 82 BS; | 1) Cephei -==--.---- 21 41 59.74 |+ 0.63 |+ 0.18 0. 00 42 00.55 40 05.04 | — 1 55,51 NORMAL EQUATIONS. 0=— + 18.00 dt-+ 0.704 O0=+5.79-+ 0.70 dt + 14.04 4 a= — 03.416 Adopted ¢ = 08.00. TIME DETERMINATIONS. 83 Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, SEPTEMBER 27, 1872. a I Name of star. as Aa. Bb. Ce. Hee AR. JNA 5 he ™. _ 8: 8. 8. 8. Rens eee av 8 m. 8: Be G Aquils...--.-22- 19 01 31.66 |— 0.07 |— 0.05 0.00 |19 01 31.54 |18 59 32.89 | — 1 58.65 E. | d@ Sagittarii ....-.. 12 09.08 |— 0.14 |— 0.02 0. 00 12 08, 92 10 10. 47 58. 45 Bait “Draconis ---4--2- 14 30.18 |+ 0.18 |— 0.04 0, 00 14 30.32 12 31.70 58. 62 Be |e DTACONIsiee se eee 19 59.00 |+ 0.29 |— 0.03 0, 00 19 59.26 18 00.45 58. 81 eee Aquilae eeser-cec 32 00.96 |— 0.12 0. 05 0, 00 32 00.79 30 01.98 58. 81 Weleys cAquilreec-asre er 42 10.86 |— 0.08 |— 0.04 0, 00 42 10.74 40 12.04 58.70 We |2 Aquilse=--22---- 46 32.70 |— 0.08 |— 0.03 0. 00 46 32.59 44 33. 92 58. 67 W.| ¢ Draconis --..-. 50 35.14 |+ 0.22 |— 0.05 0. 00 50 35.31 48 36. 64 58. 67 W.| 7 Aquile...-.. 59 53.70 |— 0.09 |— 0.02 0. 00 59 53. 59 7 54.93 58. 66 Write Cepher-ce>--.---- 15 08.75 |+ 0.43 |— 0.07 0.00 |20 15 09.11 |20 13 10. 48 58. 63 ioe geetuel Se saneaee 39 54.96 |— 0.08 |— 0.01 0.00 ;21 39 54.87 |21 37 56.16 58.71 KE. | uw Capricorni ...-.. 48 20.36 |— 0.13 0. 00 0, 00 48 2C. 23 46 21.39 | — 1 58.84 NORMAL EQUATIONS. 0=—1.11+- 12.00 dt— 2.0la O=+2.90— 2.01 dt-+ 17.614 a= — 08.157 Adopted c= 08,00. SALT LAKE CITY, UTAH, SEPTEMBER 28, 1872. i 5 Name of star. of. Aa. Bb. Ce. 1B AR. AT. 5 ls Mily oh 8. 8. & hm. 8. hom. 8 Mm, 8. Waly) Aquilise- 22.2 -o. 19 42 11.96 |— 0.11 |— 0.04 0.00 |19 42 11.81 |19 40 12.02 | — 1 59.79 Waijiie Aguils.+.--..-.. 46 33.70 |— 0.11 |— 0.02 0.00 46 33.57 44 33.90 59, 67 Weiler Oraconisy-e-.s--- 50 35.956 |4+ 0.29 0. 00 0. 09 50 36.25 43 36.46 59.79 Wir lta Aquila joc.-2---- 59 54.72 |— 0.11 |+ 0.01 0, 00 59 54, 62 57 54.91 Beal Ws ec: = Cophele-.-s=.-75-~ 6 20 15 09.28 |4+ 0.56 |+ 0.18 0.00 }20 15 10.02 |20 13 10.36 59. 66 E. | = Capricorni .--...- 22 01.67 |— 0.19 |— 0.03 0. 00 22 01.45 20 01.69 59.76 Eyre Delphini ------.- 29 07.70 |— 0.10 |— 0.04 0. 00 29 07.56 27 07.65 59. 91 E. Groombr, 3241...| 32 33.65 |-+ 0.35 |— 0.06 0. 00 32) 33.94 30 33.98 59. 96 ake Cyoni.2---..c8-. 39 05. 44 |-+ 9,02 0.00}. 0.00 39 05. 46 37 05.74 59°72 eel AQUAEMe—-=) 72-2 47 46.92 |— 0.16 |— 0.01 0. 00 AT 45.75 45 46.99 59. 76 BGC yeni s2--.----- 21 03 11.70 |— 0.01 |— 0.04 0.00 |21 53 11.65 [21 01 11.75 | — 1 59.90 NORMAL EQUATIONS. =—1.70+11.00dt— 2.044 0=+3.27 — 2.04 dt-+ 14.814 Adopted c= 02.00. a= — 05.205 84 ASTRONOMY. Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, SEPTEMBER 30, 1872. = 7 I Name of star. it Aa. Bb. Ce. it AR. AT. S Reese 8. 8. 3 Ree Mts es. Ram: as: aM. 18. Wel Ga Aguile serene cee 19 01 35,22 |— 0.07 |— 0.07 0.00 |19 01 35.08 |18 59 32.84 | — 2 02.24 W./ d Sagittarii -..---- 12 12.94 — 0.14 |— 0,04 0. 00 12 12.76 |19 10 10.23 02.53 W.| 6 Draconis -.--.---. 15 33.70 + 0.18 — 0.14 0. 00 15 33.74 13) 31.51 02, 23 Walia sDraconis=---=-— 20 02.18 + 0.29 |— 0.15 0. 00 20 02. 3% 18 00. 04 02, 28 W.| « Aquile.-......-.. 32 04,44 |— 0.12 |— 0.05 0, 00 32 04, 27 30 01.93 02. 34 Be \sy) Aquiles-s----==- 42 14.56 |— 0.08 |— 0.02 0. 00 42 14, 46 40 11.99 02. 47 B. | @ Aquile---------- 46 36.48 |— 0.08 |— 0.02 0, 60 46 36.38 44 33.87 02.51 Beales Draconisyessee--— 49 38.66 |+ 0.22 |— 0.05 0. 00 49 38.83 47 36. 33 C2. 50 B.| 7 Aquile..-....-. 50 57.50 |\— 0.09 — 0.02 0. 00 50 57.39 48 54. 89 02.50 1D, |} fe (Choe as cco cess 20 15 12.40 |+ 0.43 |— 0.10 0.00 |20 15 12.73 20 13 10,17 02. 56 W.| a Cephei..-. ...-.. 17 35.64 |+ 0.12 |— 0.06 0. 00 17 35.70 15 33. 22 02. 48 W.| @ Aquarii -.---....|21 27 53.86 |— 0.11 |— 0.04 0.00 |21 27 53.71 [21 25 51.39 02. 32 W.| & Aquarii -- 33 00.96 — 0.12 |— 0.04 0. 00 33 00. 80 31 58. 45 02. 35 W.| 11 Cephei ----.----- 42 07.06 |+ 0.24 — 0.15 0. 00 42 07.15 40 04.82 | — 2 02.33 NORMAL EQUATIONS. 0=— 0.63 + 14.00 dbt¢-— 4.164 0=+3.16— 4.16 dt + 20.61 a a == — 08,157 Adopted c= 05.00. SALT LAKE CITY, UTAH, OCTOBER 2, 1872. : =<: I Name of star. Ts Aa. Bb. Ce. Wh, AR. AT. S) hm. 8. 8. Sh 8. lis Wide 35 hm. 8 Mm. 8. 106 |) me ZAG E Sse os cece 19 32 07.96 |— 0.09 |— 0.05 0.00 |19 32 07.82 |19 30 01.90 | — 2 05.92 106/57 PACH E asec case 42 17.98 |— 0.06 |— 0.03 0.00 42 17.89 40 11.96 05. 93 1) Gy AGH -cap eects 46 39.94 |— 0.06 |— 0.03 0. 00 46 39, 85 44 33, 84 06. OL E. | e« Draconis .-.-.--- 50 42.10 |+ 0.16 |— 0.07 0. 00 50 42.19 48 36. 20 05. 99 Wei Aquilez=--s---- 20 00 00.81 |— 0.06 |— 0.06 0.00 |20 00 00,69 |19 57 54.85 05, 84 W.|« Cephei...-..-.-. 15 15.74 |++ 0.31 |— 0.25 0, 00 15 15.80 |20 13 09.96 05. 84 W.| « Capricorni .----. 22 07.52 |— 0.10 |— 0.04 0. 00 22 07.38 20 01.63 05.75 W.| e Delphini ........ 29 13.50 |— 0.06 |— 0.04 0. 00 29 13. 40 27 07.59 05, 81 W. Groombr. 3241 ---. 32 39.56 |4+ 0.19 |— 0.11 0, 00 32 39. 64 30 33.71 05.93 Br | ee eAQganlily. seoooe 21 33 04.66 |— 0.09 |— 0.02 0.00 |21 33 04.55 [21 31 55. 43 06. 12 By pen eberasiess sce. 40 02.28 |\— 0.06 |— 0.02 0. 00 40 02.20 37 56.09 06. 11 E. | 79 Draconis .-.-- ---. 53 25.03 j+ 0.21 |— 0.12 0. 00 53 25.17 51 19.10 06. 07 B. | a Aquarii --.------ 22 01 20.98 |— 0.08 |— 0.04 0.00 |22 01 20.86 |21 59 14.81 | — 2 06.05 NORMAL EQUATIONS. 0=-+ 0.46 + 13.00 dt¢— 1.904 0=+2.13— 1.90 dt+ 19.45 a a=— 05.115 Adopted ¢ = 08.00 TIME AND LONGITUDE DETERMINATIONS. 85 The following tables show the corrections and rates of the chronometers used at Pioche and Salt Lake City: CHRONOMETER AT PIOCHE.—NeEcus, No. 1491. Local sidereal Correction of chro- Adopted hourly Date. time. nometer. 1872. h. kh. m 8&8. Sept. 25 22.0 —2 30 23.65 Sept. 27 22.2 22. 07 Sept. 28 22 21. 63 Sept. 30 PPP 20. 22 Oct. 2 23.0 —2 30 19.19 CHRONOMETER AT SALT LAKE CITY.—Necus, No. 1511. Date. Local sidereal Correction of chro- Adopted hourly time. nometer. rate, 1872. h. hk. ™m. 8. 8. Sept. 25 20.4 —0 01 55.73 § Sept. 27 20.4 Ol 58.69 i A age Sept. 28 20.4 01 59.78 er oee Sept. 30 19.8 02 02. 40 ie Oct. 2 20.7 —0 02 05.95 ao Final results of longitude. | Ss |g | Mean of sig- ey oe ipnal é me correcs 5 e Blgnply een Recorded at— | nals sent and ee Borpsied Bes og Means. received. : 5 eS 25 : ae 5 a a September 25, 1872: hm. 8. ls Ge Gh Ue Ea DS SER 8 |h.m. 8. 71 cae. § | Salt Lake City| 22 49 03.48 |—0 01 55.88 [22 47 07.60 Salt Lake City i Pioohie <_<: 1 07 20.86 2 30 23.63 |22 36 57.22 |0 10 10.37 ae Salt Lake City| 23 22 33.08 |—0 01 55.91 23 20 37.17 SALUD) se opees Pioche ........| 1 40 50.32 |—2 30 23.61 23 10 26.71 10.46 | 0.09|0 10 10, 415 September 27, 1872: nord 76 | Salt Lake City| 23 25 09,82 |—0 01 58.82 23 23 11.00 Salt Lake City ; Pisehot sc 1 43 22.53 2 30 22.05 [23 13 00. 48 10.52 South § | Salt Lake City] 23 43 20.75 |—0 01 58.84 [23 41 21.91 SpE Pioche .......| 2 01 33.35 |—2 30 22.05 23 31 11.30 10.61 |0.09] 10.565 September 28, 1872: het §| Salt Lake City| 22 54 27.08 |0 01 59.90 [22 52 27.18 Sali hake Ciry } Piochie ese 1 12 38.48 |—2 30 21.63 |22 42 16,85 10. 33 -f Salt Lake City] 23 04 44.77 |—0 01 59.91 |23 02 44.86 eae Pioche .......| 1 22 56.04 |—2 30 21.63 |22 52 34.41 10.45 |0.12/ 10.390 September 20, 1872: . ay §| Salt Lake City] 22 44 29.41 |_0 02 02.61 [22 42 26.50 ane Oey i Piochet......; 1 02 36.77 |-2 30 20.23 |22 32 16.54 10. 26 ee Salt Lake City| 23 01 15.54 |—0 02 02.64 [22 59 12.90 Seer) sPiochG?... 2. 1 19 22.77 |—2 30 20.22 |22 49 02.55 10.35 |0.09} 10.305 October 2, 1872: ..§| Salt Lake City! 23 13 20.12 |—0 02 06.13 [23 11 13.99 Salt Lake City} Pioche ...--.. 1 31 23,14 |-2 30 19.19 [23 O1 03.95 10. 04 Sie S Salt Lake City, 23 19 54.85 |—0 02 06.14 |28 17 48.71 nea Pioche .......| 1 37 57.71 |—2 30 19.19 |23 07 38.52 |0 10 10,19 |0. 15/0 10 10. 115 Pioche west of Salt Lake City 04 10™ 108,358 + 05,075. 86 ASTRONOMY. Observations and computations for latitude. PIOCHE, NEVADA. Level. Corrections. Number | Microm. ™ Half-sum of “ Date. of star. | readings. Remarks. | declination. IANO] Latitude. N. Ss. and vate: Level. 1872. t. d. d. fe} i] “l 1 a“ a“ lors “a October 4. -. 7262 2.360 | 32.8 | 23.5 7275 418 | 24.0 2.0 37 56 06.3 |— 0 38.1 |+0.4 | 37 55 28.6 7727 9.405 | 33.7 | 23.5 7693 17. 663 | 23.5 | 34.0 49 50.9 |+ 5 33.7 |—0.1 24.5 7765 24, 23 SIGs |ebeed T777 8. 451_| 24.0 | 32.8 38 06 06.1 |—10 37.6 |—1.0 27.5 | 7871 8.547 | 26.0 | 30.5 37 46 20.6 |+ 9 06.0 |—1.1 25.5 | 7856 22,063 | 29.0 | 27.7 8059 21.940 | 22.0 | 35.2 8091 15. 93 33.0 | 24.1 59 31.2 |— 4 02.9 |-1.5 26.8 8114 9. 394 | 22.7 | 34.6 8091 15.930 | 33.0 | 24.1 37 51 02.3 |— 4 24.1 |—1.4 26.8 8195 20. 434 | 23.3 | 23.8 | 8136 12. 392 | 23.0 | 24.0 | 38 00 49.4 |\— 5 25.0 |+3.0 27.4 8282 19. 079 | 26.3 | 30.0 8227 14, 338 | 30.1 | 26.3 37 58 35.4 |— 3 11.6 |+0.0 23.8 8268 5.086 | 26.3 | 30.5 8247 2.478 | 30.2 | 26.1 57 12.5 |— 1 45.4 |—0.0 21 60 16. 746 | 29.5 | 27.8 120 11.579 | 26.7 | 30.8 58 56.1 |— 3 28.8 |—0.8 26.5 197 15.757 | 27.4 | 30.0 : 164 18. 454 | 29.0 | 28.5 53 36.3 |+ 1 49.0 |—0.7 24.6 } 25d 13. 663 | 31.0 | 26.0 | 223 10, 184 | 25.0 | 31.8 | 57 49.2 |— 2 20.6 |—0.6 28.0 441 10.115 | 26.6 | 32.2 349 13.9168 | 30.0 | 26.9 52 52.3 |+ 2 33.7 |—0.9 25.1 508 18. 983 | 28.0 | 31.2 ; 469 16.419 | 27.8 | 31.0 53 46.8 |-+ 1 43.6 |—2.2 28.2 560 6.085 | 31.5 | 27.8 630 22, 257 | 27.9 | 31.9 44 28.5 |+10 53.3 |—0.1 Pays 673 19. 844 | 29.8 | 30.1 657 21.509 | 28.9 | 31.0 54 17.1 |+ 1 07.3 |—0.8 23.6 857 16. 927 | 28.1 | 30.3 707 18.600 | 31.1 | 238.7 37 54 20.0 |+ 1 07.6 |—0.3 27 3 1043 | 21.089 | 28.9 | 30.8 r 1023 13.711 | 28.9 | 30.6 38 00 25.9 |— 4 58.1 |—1.3 26.5 October 5... 6623 17, 482 | 28.0 | 24.1 6602 13. 380 | 27.0 | 24.6 37 58 08.2 |— 2 45.8 |4+2.2 24.6 6697 18.140 | 23.0 | 28.9 6674 17. 020 | 26.1 | 25.8 56 13.7 |— 0 45.1 |—2. © | 37 55 26.6 LATITUDE DETERMINATIONS. Observations and computations—Continued. PIOCHE, NEVADA Number Date. of star. 1872. October 5. -. 6928 6912 6928 6968 7908 6997 7008 7034 7161 7194 7262 7275 7336 7385 7483 7410 7545 7520 T7227 7693 7871 7856 8195 8156 8268 8227 8282 8227 197 164 255 223 441 308 508 469 560 630 Microm. readings. t. 16, 844 8.103 16, 844 13.711 8.748 19, 305 8.748 23, 457 6, 230 22. 586 11, 476 10, 453 11. 900 21, 450 7.190 12.704 6. 167 14. 349 9, 720 18, 010 7.619 21.113 21.011 13. 046 6. 685 15, 925 20. 661 15, 926 16. 866 19. 552 16, 684 13.171 11, 993 15, 752 12. 569 15, 013 7, 097 23. 267 87 Level. Corrections. . Half-sum of : Remarks. declnahion See Latitude. N. Ss. andrate Level. d. d. fe} ‘ a“ / a a“ co) al! “ 23.5 | 27.9 23.8 | 28.0 38 01 21.0 |— 5 53.2 |—3.0 |37 55 24.8 23.5 | 27.9 29,9 | 22.0 37 57 30.8 |— 2 06.6 |41.3 25.5 25.0 | 26.9 25.1 | 26.0 48 19.9 |+ 7 06.6 |—1.0 25.5 25.0 | 26.9 30, 2 | 22.0 45 30.2 |+ 9 54.4 |42.2 26.8 25.6 | 26.7 28.1 | 24.0 44 22.9 |+11 00.9 |+1.0 24.8 24.0 | 28.4 3a08 | 18.7 56 06.4 |— 0 41.3 |+3.8 28.9 26.9 | 26.0 28.0 | 25.0 48 57.5 |-+ 6 25.9 |+1.4 24,8 26.0 | 28.0 27.0 | 26 0 51 44.0 |+ 3 42.8 |—0.4 26.4 31.8 | 23.0 : PRT || BA) 49 57.2 |+ 5 30 6 |—0.2 27.6 roy Wines 31.2 | 24.0 49 51.1 |+ 5 35.0 |+0.0 26.1 Aa olen 31.1 | 24.4 37 46 20.8 |+ 9 05.3 |—1.1 25.0 33.8 | 23.0 19.5 | 36.38 38 00 49.6 |— 5 21.8 |—2.3 25.5 28.0 | 29.0 29.0 | 27.0 37 49 13.1 |+ 6 13.4 |4+0.4 26.9 28.0 | 29.0 29.0 | 27.0 58 35.6 |— 3 11.3 |+0.4 24.7 29.0 | 29.6 30.0 | 28.5 53 36.5 |-+ 1 48.5 |+0.3 25.3 31.5 | 26.6 26.9 | 31.0 57 49.4 |— 2 22,0 |+0.3 27.7 30.7 | 38.0 27.5 | 30.6 52 10.4 |4+ 3 16.5 |—3.6 23.0 31,2 | 26.9 26.0 | 32.0 53 47.0 |-+ 1 38.7 |-0.6 25.1 31.0 | 26.9 27.1 | 30.6 44 28.7 !|+10 58.5 |+0.2 1387 55 27.4 58 ASTRONOMY. Observations and computations—Continued. PIOCHE, NEVADA. Level. Corrections. Number | Microm. 2 * Half-sum of : Date. of star. | readings. SURGES, declination. Gero Latitude. N. is} aril aaa, Level. 1872. te d. d. [o) i a“ 1 ul a“ fo} { ut October 5... 673 20.916 | 31.1 | 26.8 657 22,589 | 27.9 | 30.0 37 54 17.2 |-+ 1 07.6 |+0.8 |37 55 25.6 857 17.903 | 24.0 | 35.0 825 20.574 | 35.0 | 23.6 59 02.0 |— 3 35.3 |+0.1 26.8 1062 13.719 | 28.0 | 30.0 1096 13. 698 | 32.1 | 25.7 37 55 26.5 |— 0 00.8 /4-1.4 R7pal 1282 | 14.259 | 27.0 | 31.0 j 1262 6,671 | 31.3 | 27.0 38 00 34.1 |— 5 06.6 |+0.1 27.6 1424 15. 667 | 32.2 | 26.0 1429 12. 072 | 26.0 | 32.1 37 57 53.1 |— 2 25.2) 0.0 27.9 1477 | 19.064 | 32.2 | 26.0 1497 3.360 | 29.7 | 28.9 38 05 57.8 |—10 34.4 |42.8 26.2 1546 12.986 | 30.5 | 27.8 1526 17.720 | 27.7 | 30.6 37 52 17.4 |4+ 3 11.3 |—0.1 23.6 October 6-- - 6623 15. 069 | 29.7 | 16.3 6602 10.986 | 19.1 | 26.6 37 58 08.3 |— 2 45.0 |+2.1 25.4 6739 6.765 | 25.9 | 19.9 712 165 1795|/25.10) 21-0 38 OL 43.5 |— 6 20.4 {43.5 26.6 6928 15. 983 | 23.2 | 22.9 6912 7.186 | 23.1 | 23.0 ‘38 01 21.0 |— 5 55.5 |40.1 25.6 6928 15. 983 | 23.2 | 22.9 6968 12.751 | 25.8 | 21.0 37 57 30,9 |— 2 10.6 |4+1.8 22.1 7161 5. 120 | 21.0 | 26. 7194 21.404 | 28.5 | 19.9 44 23.0 |+10 58.0 |41.0 22.0 7336 10. 257 | 24.9 | 23.9 7385 TSE || By a! |) eB} bs) 48 57.6 |+ 6 25.3 |40.9 23.8 7468 1. 460 | 26.0 | 22.9 7410 9.217 | 24.7 | 24.0 50 10.2 |+ 5 13.5 |41.3 25.0 7560 6.724 | 25.0 } 23.9 7571 14, 394 | 25.2 | 24.0 50 14.4 |-+ 5 09.9 |/+0.8 25. 1 7560 6.724 | 25.0 | 23.9 7584 14, 394 | 25.2 | 24.0 48 19.8 |+ 7 03.3 |4+0.9 24.0 7727 reacisy P25 K7 0] (22-000) 7693 15. 567 | 22.3 | 21.8 49 51.2 |+ 5 33.5 |+0.7 25.4 7871 7.707 | 23.9 | 26.0 7856 21.160 | 27.5 | 22.6 46 21.0 |+ 9 03.6 |+1.0 25.6 8059 20.544 | 24.1 | 27.4 8091 14.512 | 28.6 | 23.0 37 59 31.1 |— 4 03.8 140.8 [387 55 28.1 LATITUDE, DETERMINATIONS. Observations and computations—Continued. PIOCHE, NEVADA. Date. 1872. October 6... October 7... Number of star. 8114 8097 8195 8136 8282 8227 60 120 255 223 508 469 560 630 73 657 857 825 962 980 1043 1023 1062 1096 1282 1262 1282- 1526 1424 1449 1477 1497 1546 1526 1547 1526 6623 6602 Microm. readings. 89 Level. Corrections. ~ Half-sum of c Remarks. declination! a Latitude. Ns tcrom. |Level. and refr. d. d. (or “ ‘ “un 7] ‘Omen “" 24.0 | 27.2 28.6 | 23.0 37 56 19.3 |— 0 53.8 140.8 | 37 55 26.3 25.4 | 26.2 26.2 | 24.8 38 00 49.8 |— 5 23.9 |+0.2 26.1 Die | 24. Rae) 24.0 37 58 35.8 |— 3 09.8 |—0.3 any) 26.0 | 26.9 26.9 | 26.0 58 56.5 |— 3 30.1 0.0 26.4 ole) 2200 25.9 | 27.0 57 49.6 |— 2 23.8 |+3.1 28.9 29.0 | 26.9 25.9 | 30.2 53 47:3 |+ 1 40.1 |—0.8 26.6 29.2 | 26.7 26.9 | 27.4 44 29.0 |+10 52.0 |+0.7 iva 28.9 | 26.6 Dhee|rede L 54 17.3 |+ 1 07.0 |+0.8 95.1 29.1 | 26.0 25.0 | 30.0 59 02.2 |— 3 36.5 |—0.7 25. 0 32:3.) 23.4 23.9 | 32.0 37 45 58.1 |+ 9 27.4 |40.3 25.8 al) Papal 25,0) | 31.2 38 00 26.2 |— 5 00.9 |—0.1 25.2 30.0 | 26.2 2620))| 3051 37 55 26.7 |— 0 01.1 |—0.1 eew 30.0 | 27.9 26.7 | 31.0 38 00 34.2 |— 5 07.0 |—0.8 26.4 30.0 | 27.9 27.0 | 30.9 37 54 14.9 |+ 1 13.6 |—0.6 27.9 26.0 | 31.9 31.0 | 26.0 37 57 53.2 |— 2 24.9 |—0.3 28.0 30.1 | 26.9 26.0 | 30.6 38 05 57.8 |—10 33.9 |—0.5 23.4 33.4 | 23.1 20.0 | 31.8 37 52 17.5 |-+ 3 10.7 [41.3 29.5 oa. & | 2301 25.0 | 31.8 53 47.2 |+ 1 38.5 |4+1.3 £7.0 23.8] 20.1 20.2 | 23.2 37 58 08.3 [— 2 44.4 |-10.3 | 37 55 24.2 90 ASTRONOMY. Observations and computations—Continued. PIOCHE, NEVADA. Level. Corrections. Number | Microm. = Half-sum of A Date. of star. | readings. Remarks. declination. | yFj6r9m BEE N. 8. aati mega Level. 1872. t. d. d. (o} i a“ / “ul a“ fe} i a“ October 7. -- 6697 16.157 | 26.4 | 17.6 6674 15. 020 | 16.8 | 26.9 37 56 13.8 |— 0 45.9 |—0. 4 | 37 55 27.5 6928 15. 874 | 22.0 | 22.0 6912 7.058 | 21.8 | 22.1 38 01 21.0 |— 5 56.2 |—0.1 24.7 6928 15. 874 | 22.0 | 22.0 6968 12.790 | 20.4 | 24.4 37 57 30.9 |— 2 04.6 |—1.4 24.9 7262 12.763 | 22.1 | 23.9 7275 11.758 | 23.0 | 22.7 56 06.6 |— 0 40.6 |—0.6 25.4 7336 7.937 | 24.8 | 21.2 7385 17.516 | 20.0 | 26.4 48 57.7 |+ 6 27.1 |—1.0 23.8 7468 0.902 | 19.0 | 28.4 7ALO 8.896 | 20.0 | 26.9 50 10.4 |+ 5 23.0 |—5.7 PQeaiz 7468 0.902 | 19.0 | 28.4 TATA 19. 476 | 27.0 | 21.0 42 59.4 |+12 30.6 |—1.2 28.8 7545 6. 662 | 20.0 | 27.9 7520 14.907 | 24.6 | 23.0 49 57.4 |+ 5 33.2 |—2.2 28. 4 7560 4.698 | 27.9 | 20.0 7584 15. 363 | 16.6 | 31.2 48 19.9 |+ 7 11.0 |—2.4 28.5 T7227 8. 667 | 31.8 | 17.6 7693 16. 957 | 19.1 | 29.9 37 49 51.4 |+ 5 35.0 |41.2 Bea) 7765 19.106 | 27.4 | 21.4 W777 3. 329 | 20.0 | 28.8 38 06 06.2 |\—10 37.6 |—1.0 27.6 8059 | 20.977 | 25.8 | 23.0 8091 15. 034 | 18.1 | 30.9 37 59 31.2 |— 4 00.1 |—3.5 27.6 8059 20.977 | 25.8 | 23.0 8097 7.162 | 18.1 | 30.9 38 04 48.4 |\— 9 18.3 |—3.5 26.6 8268 7.617 | 24.3 | 25 8227 16.875 | 23.3 | 26.2 37 49 13.5 |+ 6 14.1 |—1.5 26.1 8282 | 21.516 | 24.0 | 26.0 8247 5. 030 | 23.0 | 27.0 38 06 35.6 |—11 06.0 |—2.1 27.5 60 14.714 | 24.0 | 27.8 120 9.549 | 24.0 | 27.7 37 58 57.0 |— 3 28.7 |-2.8 25.5 197 8.648 | 20.8 | 31.2 164 11. 403 | 27.0 | 24.8 53 37.9 |-+ 1 51.3 |-2.9 26.3 255 11.80 | 18.0 | 35.0 223 8.39 | 27.6 | 24.3 57 49.8 |— 2 17.8 |-4.8 27.2 560 3. 582 | 27.1 | 27.0 630 19.771 | 29.5 | 25.2 37 44 29.2 |110 54.2 |4+1.5 | 37 55 24.9 Date. 1872. October 7.. October 10.. Number of star. 673 657 690 769 858 825 1043 872 1043 980 1043 1023 1062 1096 1139 1132 1282 1262 1424 1649 1477 1497 1546 1526 1547 1526 1567 1620 6697 6674 6712 6739 6928 6912 6928 6968 7008 6997 LATITUDE DETERMINATIONS. Observations and computations—Continued. PIOCHE, NEVADA. Microm. readings. t. 17, 417 19, 090 13. 580 18. 942 18. 644 11, 050 16, 329 3, 241 16, 329 17, 837 16, 329 8, 853 11.796 11.784 7.640 12. 894 14,741 7. 030 12. 645 8. 991 18, 312 2. 600 7, 878 12. 582 10. 155 12. 582 6.195 13. 707 Level. N. 8. 23 om a= GIG Sa BMS SAS) eee SS) GoRe) ane) SS WOW WH WH WOW WH WH WwW WH HWW WW HWW WW WOW Ww ww Sigs Be RS a ww NO OD we wr Sols MA WO SSO AY RR WR WO NSC SO CSD OS OO AWS CO YO YO HOW wm wre ws go Hee iy co w im a as SO CS SOF MH SS @ on ~w be ° ww wrw ee Se on Remarks. 91 Corrections. and refr. 37 54 17.6 |+ 1 07.6 |+1.7 | 37 55 26.9 37 51 46.6 |4+ 3 36.7 |+4.2 27.5 38 00 34.4 |— 5 06.9 |+1.2 28.7 38 04 15.6 |— 8 48.9 |+0.7 27.4 37 54 23.3 |-+ 1 00.9 | 26.2 38 00 26.4 |— 5 02.1 |+0.7 25. 0 37 55 26.8 |— 0 00.5 |+1.6 PFGE) 37 51 52.3 |+ 3 32.3 |42.8 27.4 38 00 34.4 | — 5 11.5 |42.8 25.7 37 57 53.3 |— 2 27.7 |+1.5 27.1 38 05 57.9 |—10 34.9 |+2.9 25.9 37 52 17.6 |+ 3 10.1 |+1.8 29.5 53 47.3 |-4+ 1 33.1 |+1.8 27.2 50 21.1 |-+ 5 03.6 |+2.8 27.5 37 56 13.8 |— 0 47.7 |-1.4 24.7 38 01 43.5 |— 6 23.4 ital 24.9 38 01 21.2 | — 5 58.7 |+1.2 23.7 37 57 31.2 |— 2 06.2 40.9, 25.9 37 48 20.2 |-+ 7 08.3 |—1.7 = 55 26.8 92 ASTRONOMY. Observations and computations—Continued, PIOCHE, NEVADA. Level. Corrections. Number | Microm. Baa Half-sum of = Date. of star. | readings. f Remarks. declinotion.| yrierom, Latitude. N. SS audirete Level. 1872. t. d. d. ‘ay Uf “ I “ “ foe “ October 10 7119 19, 801 | 37.6 | 16.5 7103 0.772 | 21.0 | 33.0 38 08 11.1 |—12 49.0 |+3.2 | 37 55 25.3 71GL 3. 982 | 28.0 | 26.0 7194 20.375 | 27.0 | 27.0 37 44 23.4 |4-11 02.4 |+0.7 26.5 7262 11,924 | 26.7 | 27.6 7275 11.007 | 26.6 | 27.5 56 06.9 |— 0 37.1 |—0.6 pat he 7336 6.251 | 29.0 | 25.0 738 15.788 | 24.4 | 31.0 48 58.1 |+ 6 25.4 |—0.9 22.6 7468 0. 662 | 30.5 | 27.0 7410 8.449 | 27.0 | 29.0 50 10.7 |+ 5 14.7 |+0.6 26.0 7468 0. 662 | 30.5 | 27.0 TATA 19.073 | 27.0 | 29.0 42 59.7 |+12 23.8 |+0.6 24.1 7545 6.930 | 34.0 | 23.0 ; 7520 15. 056 | 24.7 | 32.5 49 57.8 |+ 5 28.4 |41.1 27.3 7560 7.858 | 30.5 | 26.9 7571 15. 542 | 30.0 | 27.1 50 15.0 |+ 5 10.5 |4+2.3 27.8 7560 7.858 | 30.5 | 26.9 ‘ 7584 18. 363 | 30.0 | 27.3 48 20.3 |+ 7 04.5 |+2.2 27.0 7727 6.773 | 30.9 | 20.0 7693 15. 031 | 27.0 | 31.7 37 49 52.1 |+ 5 33.7 |42.2 28.0 7765 17.978 | 29.7. | 28.3 T7177 2.132 | 28.0 | 29.6 38 06 07.1 |—10 40.3 |—0.1 26.7 7871 5.371 | 32.0 | 26.3 7856 18.781 | 27.5 | 31.0 37 46 21.6 |+ 9 01.9 |+0.8 24.3 8059 19. 702 | 29.9 | 29.9 8091 13. 691 | 28.6 | 31.0 59 32.0 |— 4 02.9 |—0.8 28.3 8114 7.121 | 30.9 | 29.0 28097 5. 167 | 28.6 | 31.0 56 20.0°|— 0 54.7 |—0.2 25.2 8268 4.311 | 24.0 | 35.4 8227 13. 542 | 32.5 | 27.0 37 49 14.1 |4+ 6 13.0 |—2.1 25.0 8282 18. 269 | 24.0 | 25.3 8247 1.707 | 32.9 | 26.9 38 06 36.2 |—11 09.3 |+1.7 28.6 60 13. 653 | 29.9 | 28.8 120 8.380 | 26.9 | 31.5 37 58 57.2 |— 3 33.1 |-—1.3 22.8 197 10. 325 | 29.1 | 30.0 164 12.999 | 29.0 | 29.9 53 37.3 |+ 1 48.1 |—0.6 24.8 255 12. S10) 32.55) 2755 223 8.742 | 28.4 | 31.0 37 57 50.5 |— 2 24.2 |+0.8 | 37 55 27.1 LATITUDE DETERMINATIONS. Observations and computations—Continued. PIOCHE, NEVADA. 93 Date. 1872. October 10.. October 11.. Number of star. 508 469 560 630 673 657 690 707 857 769 858 825 962 872 962 980 1043 1023 1062 1096 1139 1132 1282 1326 1477 1497 1546 1526 1547 1526 1567 1620 6697 6674 6697 76 6712 6739 Microm. readings. t. 9. 996 12. 424 3. 796 19. 988 17. 621 19, 307 14,150 18, 504 15. 832 18. 484 18. 110 10,514 4.381 3. 847 4. 381 18, 451 16, 923 9. 432 12. 059 12. 010 7, 862 13. 192 13. 532 15. 370 18. 391 2.740 10, 351 15. 006 12, 540 15. 006 5. 935 13, 499 14, 238 13. 049 14, 238 8. 620 14, 062 4. 681 ge. | | ao” ws ES? S289 Se GREP Ry EBay Lens, uo “NO WO qc Wt ww 2S wm wm ww ww ww ww ww ww COR Fag RRs Geeo Bee a AS MS SSD WH WA wow woo Oo 09 OA SK FS 02 0 eo 02 Ge te Goo ox ao hy (Ss) Pe 99 £S L133 oon wo Wo wm wo wow re) <> WA 29 YS SS OS oo a. on oF OF CON OM AM NW OM OW MW OW MHD MWe WO SHO ow’ wr rm cer Paw) Sen Sete ac Oe or oOo oc oo CW WW WW 0 SMED GSS Corrections, Half-sum of declination. Microm. and refr, fe} / “ 4 “ 37 53 48,1 J+ 1 38.1 44 29.8 |+10 54.3 54 17.9 |+ 1 08.1 52 27.1 |4 2 55.9 37 53 41.1 |+ 1 47.2 38 00 35.0 |- 5 07.0 37 55 50.7 |— 0 21.6 37 45 58.9 |4+ 9 28.6 38 00 27.0 |~ 5 02.7 37 55 27.3 |— 0 02.0 51 52.8 |+ 3 35.4 37 5415.4 |4 114.3 38 05 58.2 |—10 32.5 37 52 17.8 |+ 3 08.1 58 47.5 [4+ 1 39.7 50 21.4°|+ 5 05.7 56 13.8 |— 0 48.0 37 59 11.5 |— 3 47.0 38 01 43.5 |— 6 19.1 Level. +0.2 Latitude, “ 37 55 26.8 24.4 +2.1 13755 26,5 94 Date. 1872. October 11.. ASTRONOMY. Observations and computations—Continued. PIOCHE, NEVADA. Number of star. Microm. readings. Level. N. Ss. d. d. 29.6 | 26.0 26.0 | 29.0 29.6 | 26.0 25.9 | 30.5 29.0 | 28.0 28.0 | 23.7 29.0 | 28.0 28.9 | 29.0 30.0 | 28.0 24.8 | 32.8 31.9 | 26.0 25.3 | 33.0 30.8 | 28.0 28.0 | 30.7 30.5 | 30.0 28.0 | 31.9 30.9 | 29.7 29.4 | 30.7 29.3 | 31.4 31.7 | 23.7 32.3 | 27.9 26.6 | 33.5 32.1 | 28.2 30.5 | 30.1 33.7 | 27.0 29.0 | 31.5 32.2 | 28.9 29.6 | 31.4 34.8 | 28.0 2954 3207 37.0 | 25.5 20.4 | 32.7 26.3 | 37.0 33.09 | 29.1 26.0 | 36.2 33.4 | 29,2 37.5 | 25.7 25.8 | 37.2 Remarks. Corrections. Half-sum of , declination. Mi Latitude. icrom. |r ovel and refr. ; oR Ue u (Oe if if 38 O1 21.2 |— 5 57.0 87 57 31.2 |— 2 05.0 48 20.2 |+ 7 06.5 37 45 30.6 |4+ 9 55.2 38 08 11.2 |—12 43.6 37 44 23.5 [411 05.3 56 07.0 |— 0 39.8 50 10.9 |4 5 15.5 44 33.8 |410 51.3 49 58.0 |4+ 5 20.2 48 20.5 |4 7 45.2 37 49 52.3 [4 5 33.5 38 06 07.2 |—10 44.7 37 46 21.8 |-4+ 9 03.7 59 32.0 |— 4 04.9 56 20.1 | 0 56.7 37 49 14.2 |4 6 13.1 38 06 36.3 |—11 10.0 01 04.3 — 5 41.2 +0.2 | 3755 24.4 —0.4 25.8 +0. 1 26.8 40.3 26.1 2.1 25.5 —0.6 28,2 40.0 27.2 Eee 25.2 —0.0 25.1 +0.3 28.5 —0.9 24.8 41.5 27.3 41.5 24.0 +0.6 26.1 pei 28.4 +0.3 23.7 —2,2 25.1 2.1 24.2 +0.1 | 37 £5 23,2 LATITUDE DETERMINATIONS. Observations and computations—Continued. PIOCHE, NEVADA. Date. 1872. October 11.. Number of star. Microm. readings. t, 17.569 6. 980 14, 414 Oeabe, 3. 633 8. 387 8.734 1. 397 11. 690 8. 187 9. 100 11. 534 3. 046 19. 274 16. 895 18. 581 14. 920 17.595 202 , 582 Zh “) 4,141 3.573 4,141 9. 200 11. 562 11.580 14. 066 6, 400 14. 066 15. 863 13, 181 9. 581 18. 253 2.586 Level. Remarks. N. iS) d, d. 3f. 6 || 25.5 25.8 | 37.2 S1e@ |rol.3 28.0 | 35.2 29.6 | 33.8 33.6 | 30.6 26.4 | 38.2 37.0) 27.5 30.1 | 34.6 Sil! || SEH) 30.9 | 33.9 30:7 | 33.5 37.0 | 27.0 22.8 | 41.5 40.3 | 24.6 23.0 | 41.7 31.9 | 33.8 31.0 | 34.0 32.0 | 33.6 30.9 | 34.7 BBE || GAH) B25 (0) || BB} a BB) | B25 5) 3L.0 | 34.0 31.6 | 34.2 33.8 | 32.1 36.3 | 30.0 Bie || shy) 36.3 | 30.0 2725) 8.0 32.0 | 34.1 34.0 | 32.2 36.7 | 29.5 28.0 | 38.5 Half-sum of declination. iraromt and refr. Corrections. Latitude. Level. fo} / “a / “ 38 02 32.2 | 7 07.9 37 58 39.3 |— 3 10.0 58 57.7 |— 3 32.0 53 37.6 |+ 1 47.6 57 50.7 |— 2 21.6 53 48.3 |+ 1 40.4 44 30.0 |+-10 55.6 54 18.0 |+ 1 08.1 37 53 41.3 |-+ 1 48.1 38 00 33.2 |— 5 07.9 37 55 50.8 |— 0 22.9 52 02.1 |4+ 3 24.4 37 55 27.5 |— 0 01.3 38 00 35.0 |— 5 09.7 37 54 15.5 |4+ 1 12.6 | 37 57 53.8 |— 2 25.5 38 05 58.3 |—10 33.1 -+0. 3 | 37 55 24.6 2. 4 26.9 Oud 25.3 10 24,2 1g 27.2 —2.0 26.7 ee 22.5 10 25.1 7 27.7 meg 23.4 —0.4 27.5 L_0, 7 25.8 =O 25.9 40.9 26.2 ean 26.3 =e 27.2 —1.1 | 37 55 24.1 96 ASTRONOMY. The final result is determined by Wm. A. Rogers by taking the means of groups of stars, ten pairs in a group, and forming from them one individual result. In this way, the following mean values are obtained : No. of ob- Means. servations. = fo} / “ i 3” 655) 625.58 38 2 26. 31 20 33 26. 52 36 4 25. 51 29 tip 26. 41 29 6 37 655) 626.11 41 ASTRONOMICAL CO-ORDINATES OF ASTRONOMICAL STATION AT PIOCHE, NEVADA Longitude. .75 37™ 45%.218 + 08.075, or 1149 26’ 18.27 + 1”.12 west from Greenwich. 2h 29™ 335.098, or 37° 23! 16.47 west from U.S. Naval Ob- servatory at Washing- ton, D. C. sib G)== === === a ee 37° 55! 26.07 + 0.07 north. U. S. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN, 1st Lizut. GEO. M. WHEELER, Corrs or ENGINEERS, U. S. ARMY, IN CHARGE. RESULTS OBSERVATIONS MADE BY W. W. MARYATT AND E. P. AUSTIN IN THE DETERMINATION OF THE ASTRONOMICAL CO-ORDINATES OF STATION AT GUNNISON, UTAH. SEASON OF 1872. COMPUTATIONS BY W. W. MARYATT sanp WM. A. ROGERS. 7 AST 97 ObyAe cote SIMs 5a Z 2 | G WANN LES OmN,.. Ui BeAe El. GEOGRAPHICAL POSITION OF STATION. Longitude, 111° 49/ 15.00 + 0.42 west from Greenwich. 34° 46/ 13/20 west from the U. S. Naval Observatory, Washing- ton, D. C. Latitude,. *. 39° 09/ 25.62 + 0”.05 north. Barometric altitude of observatory above sea-level, 5144.6 feet. This place, named in honor of the late Captain Gunnison, United States Army, is situated in Sam Pitch Valley, Utah, a dreary waste, which is 9 or 10 miles in extent from east to west and 12 or 13 miles from north to south. The town is a Mormon settlement, 24 miles east of Sevier River, and near the north banks of Sam Pitch Creek, lying at the northern extremity of the valley, which is surrounded by high mountains and bluffs. The astronomical station was established in the southwestern part of the town, and was connected with surrounding points by trigonometrical measurements, so that its position can be ascertained at any time. For a description of the instruments used, the reader is referred to the report on Beaver. An account of the observatory, methods of work, ete., at Gunnison, is given in the Progress Report of 1872, page 46. The weather was tolerable during the time of occupation. W. W. Maryatt was observer here, and E. P. Austin at the connected station, Salt Lake City. They exchanged signals over the Deseret Telegraph Line October 23 and 31, and November 1, 5, and 6. The length of circuit was about 100 miles. Signals were sent by the local battery at Gunnison without the assistance of any repeaters. Observations for latitude were made November 8, 15, 16, 18, 19, 20, 22, and 25. These were reduced by Wm. A. Rogers. Computation of the time-observations at both stations was made by Mr. Maryatt. Final arrange- ment of the report was made by Dr. F. Kampf. 99 100 ASTRONOMY. Tabuiation of stars used for determination of time at astronomical station at Gunnison, Utah, and Salt Lake City, Utah, 1872. = SALT LAKE SALT LAKE GUNNISON. aS. GUNNISON. ae. . a tee hon Gre ee et lew ho} oe} eft ad [SO] -] oe] + fet 1 [2 Name of star. |3/8/5/5|5/5/8|R 15/3/5185 Name of star. &/0|5/8/5/5/RIR 1515/3 ls\sletelelalelsleiaia 3/5/slelelelSlSiSigiela S/s/s|el2|2\S/e/sigle|2 slsisleleleisisisiziel2 Sl|SlSlolol/SslSlslelslols SlSlSlolo|slolslslolols DIOP |4 AIA 19)9 |O|4 4/4 || O\O\SIF IA IZ |OlO |Ol4 |4\4 a Andromed= 4|S=| 2 S622 ><) |e eC ephete -= --- <4] —- Bal eo) scl eal oa ed eS esi se eel los (ORE SS Sc sa5 sec |ss|5s| Bolsa) (s2|e|sllasiiseisel ileal) 1k JRearsy ooaos5 cooallEs B41 el el et a ea ea ool ee el a @, (Cassiopel@ 22. -2-)| <=) -aasleatos| oat ee on esl eae Gee ears epee ona selene el er Glee eee (OO CANe secs Skercel las|6 <2 SS[ ssp Slee leal saa call omc ephelase-- sea. X|X|X|--|--]--|X|X|X|X]--|X BHO Un le eeea sacs) (os|p4| eel [eel sa| selbs\leciisoliee|ealleai (ete “\aireyaih Sos = 5528) hale ele eal eal aig bye i= >< @! OGiilsssscosssoses]}e- ao|lec|leo|lee|loa|eolleaind Sec/P ||| @ ITEP Sloocons osae >AIBS<| hel 5a) [nal [oa] bss bl Pcl Bx [se] Ds 38 Cassiopeia ..---- S<<| <4] PSPS P<) Dial sole sdlleel a [nal o Piscium ----.---|X|--|X|--|X|X|--]--|--|X]--|X|| @ Aquarii --..----- X|--|X|--]--]--|X]--|X|X]--|X B Avietis ....-.---.|X|X|--|X|X|X|--|--|X|X|--|X|| @ Gruis ----- .-----]--|X]--|--]--]--|--]--|--]--|--]-- 50 Cassiopeiw ...--. XIXP< XI SEs Es PSSST) Aguaril po oe X|X|X|X| X]}--|X]--|X]X]-- |X @ SATICHS s=-—=5=== X|X|X|X|X|X]--|--]--|><|--]x]| @ Aquarii ....---.. X|X|X|X|X|X|X|--]--|X]--|X Be Oilsccsassessca: X|X|X|X|X|X]--]--]--]--|--|--|] 9 Draconis, L. C ---]--]--|-.]--]--]--]--|--|X|X]--|-- « Cassiopeixw ..---.|-- X| PIP P leat les) eel leo] [=] = y Ceti..-.. sosesece x|X|x|X|X|x|-- Ui Cephienes seer ne | |< 5< 5 | ol ee B Urse Min., L. C-.|--|--|X|--|X|--]--|-- --|--|| @ Piscis Australis -.||x<|x|xX|X|X|--|--]--|--]--|-- a Ceti..-.--.--.-.- SAB — 2419+ 116d1-+4+ 6664-4 51.87¢ c= -++ 05.349 104 ASTRONOMY. Observations and reductions for time taken at sending station—Continued. GUNNISON, UTAH, OCTOBER 31, 1872. EI Name of star. ts Aa. Bb. Ce. 7 AR. AT. a hm. 8. 8. 8. & hom. 8 |h.m. &. hm. 8. Vin || 2 Chie se esce seas 22 56 31.24 |— 0.08 |+ 0.09 |+ 0.09 /22 56 31.34 20 37 04.88 |—2 19 26. 46 W.| # Aquarii ...-.-..- 23 05 12.37 |-+ 0.38 |+ 0.04 |+ 0.06 |23 05 12.85 45 46.51 26. 34 WWE) OCyfeiiscccoss sa5- 11 51.26 |— 0.04 + 0.08 |+ 0.08 11 51.38 52 25.09 26. 29 E. | 61 Cygni-.-.---- ---- 20 37.24 |+ 0.01 |+ 0.08 |— 0.08 20 37.25 21 01 11.10 26.15 Bey Gon Gyenin----—.-—-—— 26 56.87 |+ 0.11 |+ 0.07 |— 0.07 26 56. 98 07 30. 64 26,34 E. | 8 Cephei-.-....-..|23 46 27.57 |— 0.74 |4 0.16 |— 0.21 |23 46 26.78 |21 27 00.44 |—2 19 26.34 NORMAL EQUATIONS. 0= + 0.58 + 6.00 dt— 0.74 a 0 =— 1.46 — 0.74 dt + 2.884 a= + 08.50 c found by preliminary reduction to be —- 03.06. GUNNISON, UTAH, OCTOBER 31, 1872. a | EI Name of star. Ee Aa. Bb. Ce. HE AR. AT. 3 him. 8. 8. 8. & |kom 3% |Rom 8 hom 8 E. | 11 Cephei. .....--..|23 59 30.19 |— 0.57 |+ 0.10 |— 0.22 [23 59 29.50 |21 40 03.10 |—2 19 26.40 E. | a@ Aquarii -....-.-.. 0 13 40.64 |+ 0.24 |4+ 0.03 |— 0.07 | 0 18 40.84 59 14. 48 26. 36 W.| @ Aquarii .-...-.--. 29 22.78 |+ 0.28 |+ 0.03 |+ 0.07 29 33.16 |22 10 06.78 26.38 W.| a= Aquarit ...-.---- 38 12.48 |4+ 0.24 |4+ 0.03 |+ 0.07 38 12. 52 18 46. 42 26. 40 W. | 226 Cephei .--..-----. 49 29.56 |— 0.84 |+ 0.13 |+ 0.29 49 29, 14 30 02.95 26.19 Wis) ian eeeasieesee eae 54 32.65 |+ 0.19 |-+- 0.04 |+ 0.07 54 32.95 35 06.71 26. 24 Wejee sCepher-os------ 1 04 36, 44 |— 0.38 |+ 0.09 |4+ 0.18 | 1 04 36.33 45 09.69 26. 64 W.| a Piscis Australis... 10 02.84 |+ 0.40 |-+ 0.02 |+ 0.08 10 03. 34 50 37.00 26. 34 WG || WHSEEST eee se scee 27 51.12 |4 0.16 + 0.04 |+ 0.08 27 51.40 |23 08 25. 31 26. 09 W.| 9 Cephei---------- 32.51.83 |— 0.44 |+ 0.09 |4 0.19 32 51. 67 13 25.34 26. 33 W.| @ Piscium- ..---... 1 40 56.96 |+- 0.21 [+ 0.03 |+ 0.07 | 1 40 57.27 |23 21 30.81 |—2 19 26.46 0= = NORMAL EQUATIONS. + 0.74 + 11.00 dt-— 2.30 —4,89— 2.30 dt +13.58 a TIME DETERMINATIONS. Observations and reductions for time taken at sending station—Continued. GUNNISON, UTAH, OCTOBER 31, 1872. = g Name of star. T. Aa. Bb. Ce. Te AR. AT. S | he ms 8: a 8. 8. hem. 8. hom. 8. hm. 8: E. | 38 Cassiopeia ....-. 3 41 15.98 |— 1.18 |-+ 0.62 |— 0.06 | 3 41 15.36 | 1 21 49.31 |—2 19 26.05 enon Pisciumys. see 20. 58 06.72 |+ 0.42 |+ 0.27 |— 0.02 58 07.39 38 41.04 26. 35 E. | 50 Cassiopeia ...._. 4 12 05.56 |— 1.41 |+ 0.85 |— 0.06 | 4 12 04.94 52 38.71 26. 23 Pe | ae eAnietisecote oo. 19 26.28 |-+ 0.25 |+ 0.33 |— 0.02 19 26.84 | 2 00 00. 66 26.18 Wis]! &) (Cotas ee ae 28! 25 41.33 + 0.43 |4+ 0.27 |-+ 0.02 25 42.05 06 15.85 26. 20 W.| ¢ Cassiopeia ...... 38 04,12 |\— 0.96 |+ 0.71 |+ 0.05 33 03. 92 18 37.99 25. 93 W.| 5 Urs. Minoris,L.C.} 47 08.32 |+ 3.11 |— 0.57 |~ 0.08 47 10.78 27 44.78 26. 00 Wik. Cetites fue. 2. 56 08.49 |-+ 0.49 |+ 0,25 |-+ 0,02 56 09.25 36 43.03 26, 22 W.| 8 Urs. Minoris, L.C.| 5 10 25.70 |-+ 2.83 |— 0.48 |— 0.07 | 5 10 27.98 51 01.87 26.11 Wisilitas (Cetiges os csneene: 15 03.67 |-+ 0.48 |— 0.26 |-+ 0.02 15 04.43 | 2 55 38.25 |-2 19 26.18 NORMAL EQUATIONS. O=+ 0.514 10.00 dt-+ 5.42a-+ 10.60 O—-+ 25.78 -+ 5.42 dt+ 84.23 a + 21.64 ¢ a= -+ 05.82 0 = + 12.58 + 10.60 d¢ + 21.64 a + 62.21 ¢ c =— 05,02 GUNNISON, UTAH, NOVEMBER 1, 1872. | Name of star. a Aa, Bb. Ce. aie AR. AT. é | hom 8s. i & 8. 8. leit. EP h. m. 8. hm. 8. Wisiia: (Cyenia eesenee 22 56 28.60 \— 0.07 |+ 0.21 |+ 0.03 22 56 28.77 20 37 04.86 |—2 19 23.91 Wier) Cymnin sects. ote 23 11 48.65 |— 0.04 |+ 0.20 |+ 0.02 23 11 48.83 | 52 25.06 23.77 136 | UO Met spo S ee pace 20 34.77 |-+ 0.01 |+ 0.19 |— 0.03 20 34,94 21 O1 11.07 23, 87 E.|¢ Cygni-..........|23 26 54, 46 + 0.11 |+ 0.17 ie 0.03 [23 26 54.71 07 30.62 |—2 19 24,09 NORMAL EQUATIONS. 0 =— 1.04 + 4.00 dt + 0.00 a + 0.05¢ 0 =— 0.08 + 0.00 dt + 0.07 a + 0.54 ¢ a = -+ 08.58 0=— 0.24 + 0.05 dt + 0.54 a —6.68¢ c =— 05,02 ASTRONOMY. Observations and reductions for time taken at sending station—Continued. GUNNISON, UTAH, NOVEMBER 1, 1872. a g Name of star. rT Aa. Bb. Ce. au AR. AT. 5 hm. 8. 8. 8. Ch Wish 5 8 Nib wie hm. 8. S|) Ge eA quanil---ceeee- 0 29 29.96 |4+ 0.75 |4+ 0.05 |— 0.05 | 0 29 30.71 |22 10 06.77 |—2 19 23.94 TWA A quantiee sae sees 38 09.87 |+ 0.63 |+ 0.06 |— 0.05) 38 10.51 18 46. 41 24.10 W. | 226 Cephei .--------- 49 28.76 |— 2.40 |+ 0.25 |— 0.21 49 26.40 30 02.85 23.55 Aye. Pemrasi sesso see 54 30.25 |+ 0.50 + 0.07 |— 0.06 54 30.76 35 66. 69 24. 07 eae. (Cephel sass == 1 04 34.77 |— 1.08 |+ 0.16 |— 0.13 | 1 04 33.72 45 09. 64 24,08 W.| a Piscis Australis. 09 59.91 |-+ 1.10 |+ 0.03 |+ 0.06; 10 01.10 50 36.98 24.12 W.\|@. Pegasi-2._ <--=:- 17 48.79 |+ 0.44 |+ 0.07 |+ 0,05 17 49.35 58 25.30 24.05 Wie Cephercs 225 ---- 32 50.24 |— 1.24 |+ 0.17 |4+ 0.11 32 49.25 [23 13 25.30 23. 98 W. | 6= Piscium. ---- ---- 40 54.05 |4- 0.55 |+ 0.06 |4+ 0.05 40 54.71 21 30.80 23. 91 Wy Cepheie----- 55-- 1 53 36.45 |— 2.73 |+ 0.27 |+ 0.23 | 1 53 34.22 34 10.39 |—2 19 23.83 NORMAL EQUATIONS. 0=— 4.11+ 10.00 dt— 446a— 0.78 ¢ 0=+17.38— 4.46 dt-+17.53 a4 3.65 ¢ a=-+ 15.01 0=+ 075— 0.78 dt+ 3.65 a4 + 54.73 € ¢ =— 08,05 GUNNISON, UTAH, NOVEMBER 1, 1872. z Mira | i | | = Name of star. ae Aa. Bb. Ce. 4 AR. AT. 5 ie Gite o 8. Sy Witotits Gh hm. 8. hean. | 3: W. | 38 Cassiopeiz .----- 3 41 13.93 |— 1.45 |+ 0.47 |+ 0.23 | 3 41 13.18 | 1 21 49.30 \—2 19 23.88 Wei|'/8) -Axietisz.- = --=--- 4 07 00.20 |+ 0.35 |4+ 0.24 |+ 0.09 | 4 07 00.88 47 37.24 23. 64 W.| 50 Cassiopeie .----- 12 03.61 |— 1.73 |+ 0.64 |+ 0.26 12 02.78 52 38.71 24. 07 BH. | a) Atictis==2-22--.- 19 23.92 |+ 0.31 |+ 0.25 |— 0.09 19 24.39 | 2 00 00,65 23.73 By |) 2 (Ceti es sone sc- 25 39.11 |+ 0.52 |4+ 0.21 |— 0.08 25 39.76 06 15.85 23. 91 i. | ¢ Cassiopeia .----- 38 02.41 |— 1,18 |4 0.54 |— 0.21 38 01.56 18 38.00 23. 56 E.|5 Urs. Minoris,L.C.| 47 04.68 |+ 3.80 |— 0.43 |+ 0.34 47 08.39 Q7 44.77 23. 62 IDB 7 (ORT S885 posisen se 4 56 06.23 |+ 0.59 |+ 0.19 |— 0.08 | 4 56 06.93 | 2 26 43.04 |-2 19 28.89 —— J NORMAL EQUATIONS. O=— 0.974 10.00 t+ 12la— 5.71e 0 = — 22.28 + 1.21 dt+21.77a— 833 e¢ a=-+ 15.00 0=+10.81— 5.71 dt— 8.33 a+ 37.01 ¢ c = — 0.08 TIME DETERMINATIONS. Observations and reductions for time taken at sending station—Continued. GUNNISON, UTAH, NOVEMBER 5, 1672. Ss EI ts Aa. Bb. Ce. Us AR. ANE: 5 lis Gite 8. 3. te | |Woberiis 968 hems 98 hz. 8. E. 22 56 21.77 |— 0.13 |— C.03 |— 0.07 |22 56 21.54 |20 37 04.75 |—2 19 16.79 195 | 72 PAG EN os eee 23 05 02.83 |-+ 0.72 |— 0.01 |— 0.05 |23 05 03. 49 45 46. 43 17. 06 Boia Cyoni-ce. 22. 3-2: 11 42.06 |— 0.07 |— 0.03 |— 0.07 11 41.89 52 24.97 16. 92 W.| 61 Cygni-..-..--..-..] 20 27.76 |+ 0.02 |— 0.02 /+ 0.06 20 27.82 /21 01 10.99 16. 83 Wil Ge. (Cygmireesemesne. 23 26 47.33 |+ 0.18 |— 0.02 |+ 0.06 [23 26 47.55 07 30.55 |—2 19 17.00 NORMAL EQUATIONS. = — 0.05 + 5.00 dt + 0.76 a + 1.32¢ 0=— 0.51 + 0.76 dt + 0.64 a + 0.23 ¢ a=-+ 08.96 0=-+ 0,31 + 1.82 dt + 023 a+7.70¢ c=— 03,05 GUNNISON, UTAH, NOVEMBER 5, 1872. a g Name of star. 1 Aa. Bb. Ce. i AR. AT. a Rev meare 8. a Bs hm 8. he mn 8 lis tis EE W.| 6 Aquarii.....---.| 0 29 22.82 |+ 0.46 |— 0.02 |4+ 0.13 | 0 29 23.39 )22 10 06.71 |—2 19 16.68 W.| a Aquvarii Be + 0.39 |— 0.02 |+ 0.13 38 03. 02 18 46, 36 16. 66 W. | 226 Cephei — 1.47 |— 0.08 |+ 0.51 49 19, 24 30 02.55 16. 69 W.| ¢ Pegasi + 0.30 |— 0,02 |4- 0.13 54 23. 46 35 06, 65 16, 81 W.|c Cephei — 0.66 |— 0.05 |+ 0.31 | 1 04 26.15 45 09. 49 16. 66 E. | a Piscis Australis. + 0.67 |— 0.01 |— 0.15 09 53.36 50 36.93 16. 43 E. | a Pegasi + 0.27 |— 0.02 |— 0.13 17 42.02 58 25. 26 16. 76 E. | o Cephei — 0.76 |— 0.06 |— 0.34 32 41.86 23 13 25.16 16.70 E. Groombr. 4163 - - — 1.25 |— 0.07 |— 0.46 | 2 07 58.42 48 41.35 17.07 Heals Eerasine. ----2s. 25 57. 67 |+ 0.27 |— 0.02 |— 0.13 25 57.79 | 0 06 41.27 |—2 19 16.52 NORMAL EQUATIONS. O=-+ 1.76+-10.00 d¢— 2.90a— 0.06 ¢ 0=— 10.34— 2.90 dt-+ 15.09 a+ 0.9L ¢ a =-+ 08.62 O=+ 5.90— 0.06 dt-+ 0.91 a+ 47.95 ¢ ec =— 08,13 108 ASTRONOMY. Observations and reductions for time taken at sending station—Continued. GUNNISON, UTAH, NOVEMBER 5, 1872. 5 Name of star. Tr, Aa. Bb. Ce. i, AR. ANT ls ey Gh 3 8. 8. h.m. 8 [Das Ek Rims, 13: I. | 38 Cassiopeia .-.--- 3 31 07.00 |— 1.29 |+ 0.06 |— 0.23 | 3 41 05.54 | 1 11 49.28 |-2 19 16.26 BK || @ IBROtNNe coos 55c5 57 57.28 |+ 0.46 |+ 0.03 |— 0.08 57 57.69 33 41.05 16. 64 Bees Avietise ness 4 06 53.45 |+ 0.31 |+ 0.03 |— 0.09 | 4 06 53.7 47 37.26 16. 44 E. | 50 Cassiopeia ...--. 11 56.76 |— 1.53 |+ 0.08 |— 0.26 11 55.05 52 32.73 16. 32 W.| a Arietis -...-...--. 19 16.87 |+ 0.27 |+ 0.03 |+ 0.09 19 17.26 | 2 00 00.69 16.57 Wie! Ceti sesce-5 2235 25 31.87 |+ 0.46 |4+ 0.03 |-+ 0.08 25 32.44 06 15.88 16. 56 W.|c Cassiopeix .----. 37 56.14 |— 1.05 |+ 0.07 |+ 0.21 37 155.3, 18 38. 05 17. 32 W.|5 Urse Min., L. C--. 46 58.61 |+ 3.38 |— 0.04 |—- 0.34 47 01.61 27 44.77 16. 84 Weelty=1Getines ce mee sees 55 59.01 |+ 0.53 |4 0.02 |-+ 0.08] 55 59.64] 36 43.07 16.57 W.| 6 Urse Min.,L.C-.-| 5 10 15.48 |4+ 3.07 |— 0.03 |— 0.31 | 5 10 18.21 | 2 51 01.82 |—2 19 16.39 NORMAL EQUATIONS. 0O=+ 0.92-+ 9.00 dt+ 1.72a— 6.72¢ 0 = — 17.56 + 1.72 dt + 22.04a— 8.856 a=-+ 05.89 O0=-+ 3.44—6.72 dt— 8.85 a-+ 48.03 ¢ ¢ =— 0808 GUNNISON, UTAH, NOVEMBER 6, 1872. 2 Z : =——* A Name of star. ae Aa. BD. Ce a. AR. aA 5 , Re meats: 8. Sb 8. hom. 78: hm 8 hom. 8. i. | x Aquarii......--. 0 38 00.04 |+ 0.21 |+ 0.03 |— 0.12 | 0 38 00.16 )22 18 46.35 |—2 19 13.81 Ty. |'226'Cephei .......- =. 49 17.30 |— 0.79 |+ 0.14 |— 0.48 49 16.17 50 02. 47 13.7 By |G Seepage cecccec- 54 20,45 |-+ 0.16 |+ 0.04 |— 0.12 54 20.53 35 06, 64 13. 89 Wei (Cephet@220...2- 1 04 24.17 |— 0.35 |+ 0.09 |— 0.29 | 1 04 23.62 45 09. 45 14.17 W.| @ Piscis Australis. 09 50.28 |+ 0.36 |+ 0.02 |-+ 0.14 09 50. 80 £0 36. 92 13. 88 Wella. heraniencsse =e 17 38.84 |+ 0.14 |+ 0.04 |+ 0.12 17 39.14 58 25. 25 13. 89 Weilon Cephelee--pee ae 32 39.21 |— 0.40 |+ 0.10 |+ 0.31 32 39, 22 (23 13 25.11 14.11 Wel) TROIS oe sane 40 44,38 |-+ 0.18 |+ 0.04 |+ 0,12 40 44,72 21 30.76 13. 96 Wy) (‘Cephei--.--- -2-- 1 53 24.21 |— 0.89 |+ 0.15 |+ 0.53 | 1 53 24.00 23 34 10.07 |\—2 19 13.93 NORMAL EQUATIONS. 0=+2.2149,00dt— 421a+ 1.78¢ = — 6.04 — 4.21 St +17.97a— 2.996 a=-+ 05.33 0=—515+178dt— 2.89a+53.71¢ c =— 0812 TIME DETERMINATIONS. 109 Observations and reductions for time taken at sending station—Continued. GUNNISON, UTAH, NOVEMBER 6, 1872. Name of star. Tt: Aa. Bb. Ce: AUG AR. PM te him. 8. 8. Be 38. him. 38. hem. 8. hom 8. 38 Cassiopeiw --.... 3 41 03.13 |— 0.70 |+ 0.08 |+ 0.34 | 3 41 02.85 | 1 21 49.97 |—2 19 13.58 o Piscium - 54. 04 |-+ 0.25 |+ 0.03 |+ 0.12 57 54, 44 38 41.05 13.39 oe -ATICtIse. 9. sc2=22 50.38 |-+ 0.17 |+ 0.04 |+ 0.13 | 4 06 50.72 AT 37.26 13. 46 50 Cassiopeia .---.. 11 52.47 |— 0.83 |+ 0.11 |+ 0.38 11 52.138 52 38.72 13. 41 a@ “Avietiseee--..-. = 19 14.12 |+ 0.15 |+ 0.04 |— 0.13 19 14.18 | 2 00 00.69 13. 49 El (Coetie cane eanes ces 25 29.27 |+ 0.25 |-+ 0.03 |— 0.12 25 29. 43 06 15.88 13.55 « Cassiopeiz ...--. 37 52.29 |\— 0.57 |+ 0.09 |— 0.30 37 51.51 18 38. 06 13. 45 ye Cotices-citecsen: 4 55 56.36 |+ 0.29 |4+ 0.03 |— 0.12 | 4 55 56.56 | 2 36 43.08 |—2 19 13. 48 NORMAL EQUATIONS. O= + 0.54 + 8.00 di —2.08a-+ 2.506 0=— 2.76 — 2.08 dt -++7.58a— 7.16¢ a=-+ 08.48 0 = — 0.23 + 2.50 dt — 7.16 a + 30.30 ¢ ce =— 05,12 Observations and reductions for time taken at receiving station. SALT LAKE CITY, UTAH, OCTOBER 23, 1872. Name of star. a Aa. Bob. Ce. Te AR. Texas Regn 08: 8 o 8. Rem. as [Ps Gps ~ EB ™. &. GP -Cypnils ss-22 22-6 21 10 08.87 |-+ 0.05 |— 0.06 |— 0.06 [21 10 08.80 |21 07 30.79} — 2 38.01 a; (Cephel)e- =. ==. 18 10.58 |— 0.18 |+ 0.18 |— 0.11 18 10, 47 15 32. 43 38. 04 B (Cepheit--2325-5-. 29 39.17 |— 0.33 |+ 0.18 |— 0.15 29 38. 87 27 00.93 37.94 & A QUaRIS-eeree 33 36,19 |+ 0.17 |+ 0.03 |— 0.05 33 36, 34 30 58.17 38. 17 e> Begasi --22t-.c2 40 33.88 |+ 0.12 |+ 0.03 |— 0.05 40 33.98 37 55.73 38. 25 ww Capricorni ....-. 48 58.87 |+ 0.19 |+ 0.05 |4+ 0.05 48 59.16 46 21.10 38. 06 79 Draconis-. .-. ..<. 53 55.99 |— 0.42 |4+ 0.32 |-+ 0.17 53 56. 06 51 17.85 38. 21 @ -Aquarit > ce: 2-2 22 01 52.32 |4+ 0.15 |+ 0.07 |+- 0.05 /22 01 52.59 59 14.58 38. 01 OS -Aquanireeessces: 12 44.66 |+ 0.17 |4+ 0.06 |+ 0.05 12 44.94 |22 10 06.88 38. 06 To AQ Mae. een 21 24.22 |+ 0.15 |+ 0.08 |+ 0.05 21 24,50 18 46.52 | — 2 37.98 ; NORMAL EQUATIONS. 0 = — 0.47 + 10.00 dt + 0.39 a O0=—211+ 0.39 dt+ 9.17 a a= -+ 08.228 Adopted c= - 03,05 for W. 110 ‘ASTRONOMY. Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, OCTOBER 23, 1872. a 5 Name of star. Ty Aa. Bb. Ce. or. AR. AT. 3 he. M. 08: ae 8. 8. acy Mh See Teen 5 ms oS iW. |e) Piscium)2----—-=- 23 36 02.20 + 0.11 |+ 0.25 |4 0.05 |23 36 02.61 [23 33 24.52 | — 2 58.09 Ww. Groombr. 4163-..} 51 19.43 |— 0.36 |-F 0.87 |+ 0.17 51 20.11 48 41.87 38. 24 Wallta) Piscinms---e>- 55 24.55 |+ 0.11 |+ 0.22 |4 0.05 55 24.93 52 46. 87 38. 06 E. | @ Cassiopeix ..---. 0 35 56.85 + 0.09 |— 0.21 |— 0.09 | 0 35 56.64 | 0 33 18.69 37.95 Bien) Cetleaee aeeiaae ee 39 50.94 |+ 0.17 |— 0.06 |— 0.05 39 50.88 37 12.55 38. 33 Epiite Pisciumie.------- 0 58 59.12 |+ 0.11 |— 0.07 |— 0.05 | 0 58 59.11 | 0 56 20.75 | — 2 38.33 NORMAL EQUATIONS. O—+ 0.29 + 6.00 dt+ 1.164 0=— 1.0041.16 t+ 5.73 4 a—-+ 08,19 Adopted c= + 05.05 for W. SALT LAKE CITY, UTAH, OCTOBER 25, 1872. & 5 Name of star. TT Aa. Bb. Ce. me AR. AT. = oO \y ||Ro an. ee: EB 8. 8. hom. 8. hm. 8. m. 8. Bo || (¢ Chfetocecoss ake. 21 10 12.12 + 0.01 |— 0.17 |— 0.06 [21 10 11.90 |21 07 30.75 | — 2 41.15 E.| a@ Cephei ..--..--.. 18 13.75 '\— 0.03 |— 0,42 |— 0.11 18 13.19 15 32.34 40. 85 Boe Aquari<-s-.-—-: 27 32.44 + 0.03 |— 0.14 |— 0.05 27 32.28 24 51.08 41.20 E. | B Cephei ..--.----- 3y 41.33 |— 0.06 |— 0.51 |— 0.15 30 40.61 28 00.81 40.80 edhe eA Guan se-- = 33 39.36 |+ 0.03 |— 0.13 |— 0.05 33 39.21 30 58.14 41. 07 Wralite. Regasis---<.--.- 40 36.79 |+ 0.02 |— 0.08 |+ 0.05 40 36.78 37 55. 80 40. 98 W.|| 79 Draconis -......- 21 53 59.66 |— 0.07 |— 0.52 |+ 0.17 |21 53 59.24 |21 51 17.72 | — 2 41.52 NORMAL EQUATIONS. 0=— 0.89 + 7.00 dt—1.79 a 0 =— 0.04 — 1.79 dt +-7.79 a a=-+ 03,04 Adopted c= + 05.05 for W. TIME DETERMINATIONS. 111 Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, OCTOBER 25, 1872. = I Namo of star. TR, Aa. Bb. Ce. Te, AR. AT. a eens, wae 8. Ge 8. lintits 6 Weis EB be Wr Cepheiec---.-.2 23 16 06.09 |4+ 0.44 |— 0.33 |+ 0.13 )23 16 06.33 |23 13 25.55 | — 2 40.78 Wie) Pisciomen eee 24 12.06 |— 0.22 |— 0.09 |+ 0.05 24 11.80 21 30.85 40.95 W.|c¢ Piscium-.........|23 36 05.33 |— 0,22 |— 0.03 |+ 0.05 36 05.13 33 24.51 — 2 40.62 NORMAL EQUATIONS. 0 =— 1.25 + 3.00 dt + 0.00 a 0=-+ 0.77 + 0.00 dt + 2.03 a a=— 0.38 Adopted c= + 08.05. SALT LAKE CITY, UTAH, OCTOBER 31, 1872. =| | g Name of star. it Aa. BD. Ce. 1, AR. AT. 6 | h. me 8. 8. a Saye |\/ee Mme Awl | Pee hee Bs Mm. ~ 8. Miva yer Geb BAB eon 21 27 33.29 |-+ 0.15 |— 0.15 |+ 0.05 |21 27 33.34 \21 24 50.99} — 2 42.35 WeniGe Cepheltess sce ccee 29 42.97 |\— 0.29 |— 0.97 |+ 0.15 29 41.83 27 00. 45 41.38 Wisk hae AG ati eee Sayer 33 40.35 |+ 0.16 |— 0.28 |+ 0.05 33 40,28 30 58.05 42. 23 Wel|kepeceepasins =. a- sa 40 37.94 |-+ 0.11 |— 0.26 |+- 0.05 40 37.84 37 55.71 42.13 Wien |mlie Cepheiwas-see eas 42 46.36 |— 0.31 |— 0.60 |+ 0,15 42 45. 60 40 03.11 42,49 KE. | # Capricorni -.--.. 49 03.23 |+ 0.17 |— 0.25 |— 0.05 49 03.10 46 21.00 42.10 E. | 79 Draconis .....-.-. 54 01.03 |— 0.38 |— 1.25 |— 0.17 53 59, 23 51 17.30 41.93 E. | a@ Aquarii -.....-../22 01 56.88 |+ 0.14 |~— 0.32 |— 0.05 [22 01 56.65 59 14, 48 42.17 eG) Aquarit sssse-- 5 12 49.21 |+ 0.16 |— 0.28 |— 0.05 12 49.04 )22 10 06.78 42, 26 BH. | 9 Draconis, L. C -. - 26 50.85 |+ 0.77 |4+ 0.59 |+ 0.21 26 52. 42 24 10.51 41,91 I. | a Andromede ..... 0 04 31.08 |+ 0.05 |— 0.06 |— 0.06 | 0 04 31.01 | 0 01 48.98 42.03 Rielly. (Regasl sc2-~.ose 09 23.31 |+ 0.09 0.00 |— 0.05 09 23.35 06 41.28 | — 2 42.07 Le | NORMAL EQUATIONS. 0.=— 0.73 + 12.00 dt-+- 0.604 0=—5.19+ 0.60 dt + 25.18 a a= -+ 08.205 112 ASTRONOMY. Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, OCTOBER 31, 1872. s I Name of star. iT Aa. | Bb. | Ce. te AR. AT. 3 LOG Oe Bs 8. 8. 8. hm. 8 fis is SR ae eB We Weds (Ceti aa. aa-55- o> 1 20 22.54 0.00 |+- 0.02 |+ 0.05 | 1 20 22.61 | 1 17 40.30 | — 2 42.31 W.| 38 Cassiopeiz --..- 24 31.06 0.00 |+ 0.08 |+ 0.14 24 31.28 21 49.32 41.96 We |Be Avietis:=-.-52--- 50 19.26 0.00 |-+ 0.15 |+ 0.05 50 19. 46 AT 37.23 42, 23 W.| 50 Cassiopeie ---.--. 1 55 20.49 0.00 |+ 0.60 |+ 0.16 55 21.25 52 33.71 | — 2 42.54 NORMAL EQUATIONS. 0=- 1.06 + 4.00 dt — 2.08 a 0 = — 0.56 — 2.08 dt + 5.09 a a= 0.00 c¢=-++ 08.05 for W. SALT LAKE CITY, UTAH, NOVEMBER 1, 1872. & EI Name of star. Ts Aa. Bb. Ce. Ww, AR. AT a hom. 8 Se 8. SB \lifo te ss Gide oF m 8 W.| 6 Cephei -.-.....- 21 29 41.64 |— 0.04 0.00 |-+ 0.15 |21 20 41.75 |21 18 00.39 | — 2 41.36 W.| § Aquarii---..<-.- 33 39.86 |+ 0.02 0.00 |+ 0.05 33 39.93 30 58. 08 41.85 W.|e Pegasi.--- 40 37.52 |+ 0.01 0.00 |+ 0.05 40 37.58 37 55.70 41.88 W.| 11 Cephei 42 44.58 |— 0.04 0.00 |+ 0.15 42 44.69 40 03.05 41.64 W.| # Capricorni-. --.-. 49 02.86 |+ 0.02 0.00 |+ 0.05 49 02.93 46 20.98 41.95 E. | 79 Draconis -.----- 53 59.19 |— 0.05 |+ 0.23 |— 0.17 53 59.20 51 17.23 41,97 E.|a Agquarii-..----..|22 01 56.38 |4 0.01 |+ 0.03 |— 0.05 |22 01 56. 36 59 14. 47 41.89 E. | 6 Aquarii.-...--.-. 12 48.67 |+ 0.02 0.00 |\— 0.05 12 48.64 /22 10 06.77 41. 87 E. | a Aquarii.-....-- 21 28.39 |+ 0.01 0.00 |— 0.05 21 28.35 18 46.41 41.94 E.|9 Draconis, L. C..}22 26 52.12 |4+ 0.09 |— 0.46 |— 0.21 26 51.54 24 10,60 | — 2 41.94 NORMAL EQUATIONS. 424.784 a= + 05,026 TIME DETERMINATIONS. — 113 Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, NOVEMBER 1, 1872. = a Name of star. a Aa Bb Ce. a AR. AT. S — h. m. 8: 8. | 8. 8. hem. 38. hm 8. Mm. 8. E. Cette eost esc. 1 20 22.28 |— 0.15 |+ 0.02 |— 0.05 | 1 20 22.10 | 1 17 4.30 | — 02 41.80 E. Cassiopeia ..--... 24 30.42 |+ 0.28 + 0.13 |— 0.14 24 30. 69 21 49.31 41.38 Ww. Piscium ....-.... 41 22.71 |— 0.11 — 0.07 |+ 0.05 41 22.58 38 41.04 41.54 W. Arietis -.......- 50 18.73 |— 0.07 + 0.08 |+ 0. 05 50 18.79 47 37.24 41.55 w. Cassiopeie -.--. 55 19.59 |+ 0.32 4+ 0.68 |+ 0.16 55 20.75 52 38.73 42. 02 W. ATIGHISIS aces (-=5) 2 02 42,22 |— 0.07 rt 0.26 |-+ 0.05 | 2 02 42.46 | 2 00 00.67 | — 02 41.79 NORMAL EQUATIONS. = — 0.98 + 6.00 dt —1.01 a == + 1.12 — 1.01 dt + 5.75 a. a=— 08.21 SALT LAKE CITY, UTAH, NOVEMBER 5, 1872. | Clamp. See Nanie of star. ie Aa. Bb. Ce. Atte AR. AES hm. 8. 8. 8. 8. Rem.) 8 hm. 8 m. 8 Cephei .........|23 16 01.13 |-+ 5.09 |— 0.46 |+ 0.08 |23 16 05.84 /23 13 25.09 | — 02 40.75 PUSCIUM Seas eee 24 14.06 |— 2.52 |— 0.07 |+ 0.03 24 11.50 21 30.82 40. 68 Biscium) .222. <=. 36 07.59 |— 2.57 |— 0.10 |-+ 0.03 36 04.95 33 24.40 40, 55 Cephei.2se¢-=5-=- 36 40,31 |+11.31 |— 0.62 |+ 0.13 36 51.13 34 10.29 40. 84 Groombr. 4163 -.| 51 14.14 |+ 8.44 |— 0.44 |— 0.11 51 22.03 48 41.35 40. 68 Piscium —<-.--- 55 30.21 |— 2.48 |I— 0.09 |— 0.03 55 27.61 52 46.80 40, 81 Andromedx .-...| 0 04 30.97 |— 1.04 |— 0.10 |— 0.03 | 0 04 29.80 | 0 01 48.96 40. 84 Repasier=sstcees 09 24.11 |— 2.00 |— 0.06 |-— 0.03 09 22, 02 06 41.26 40.76 Ceti tree: peas: 15 41.21 |— 3.39 |+ 0.02 |— 0.03 15 37.81 12 56 96 | — 62 40.85 NORMAL EQUATIONS. =— 13.12 + 9.00 dt— 2.49a+4 1.27 c¢ 0 = + 60.68 — 2.49 dt-+-13.78a— 8.53¢ a=— 45.346 0 =— 38.70 + 1.27 dt— 8.53a-+ 45.30'e c = + 05.029 8 AST 114 ASTRONOMY. Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, NOVEMBER 6, 1872. = 2 eI Name of star. Aa. Bb. Ce. a; AR. AT. 3 8. 8. 8. hem. 8. hom. 8. Mm. 8. Eye) sCephel:----4--—- + 0.56 |— 0.48 |— 0.15 |21 29 40, 28 |21 27 00.08 2 40.20 ee) AgQuaniiven a ceo-- — 0,29 |— 0.13 |— 0.05 33 38. 03 30 57.97 40. 06 Bayle, erasieses.-/-25 — 0.20 |— 0.15 |— 0.05 40 35.72 37 55. 63 40. 09 Bey eb i@epheteses aaa + 0.60 |~— 0.47 |— 0.15 42 42.58 40 02.73 39. 85 E. | # Capricorni ..--.-. — 0.32 |— 0.10 |— 0.05 49 00.90 46 20.91 39. 99 W. | 79 Draconis ..-.-....-. + 0.72 0.00 |-+ 0.17 53 56.91 51 16.88 40. 03 W.|@ Aquarii -..-..-.. — 0.26 |— 0.01 |+ 0,05 |22 01 54. 49 59 14. 41 40. 08 Win) | (Op eAQuanitwes=se === — 0.29 |j— 0.02 |+ 0.05 12 46.71 |22 10 06.70 40. 01 W.. | iat—Aquaxii —2---.---- i—- 0,24 |-+ 0.08 |-+ 0.05 21 26.39 18 46.35 40. 04 Welk) iCepheree-eeea-—- + 0.45 |-+- 0.16 |+ 0.13 |23 16 05.46 |23 13 25.12 40.34 Whol 1benatineasseatss — 0.20 |+ 0.04 |+ 0.05 24 10.91 21 30.76 40.15 Wil ic Sbiscioms coe oe ee — 0.21 |+ 0,00 |+ 0.05 36 04.48 30 24,43 40. 05 IW) | yan Cepheleeseeesae= + 0.82 |— 0.07 /+ 0.22 36 49.89 34 10.08 | — 2 39.81 NORMAL EQUATIONS. 0 =— 3.48 + 13.00 dt¢— 2.97 a 0=+8.12— 2.97 dt + 19.484 a=— 08.39 Adopted c = + 0°05 for W. SALT LAKE CITY, UTAH, NOVEMBER 6, 1872. g Name of star. mn ‘Aa. Bb. Ce. 1, AR. AT. S) ———_____ | | lOstita 3. oe 8. hm 8 hom 8 Mm. 8 PON Ceti sae eres = -| 1 20 20.64 |— 0.31 |— 0.03 |— 0.05 | 1 20 20.25 | 1 17 40.30 | — 2 39.95 E. | 38 Cassiopeiz - 24 28.78 |+ 0.55 |— 0.05 |— 0,14 24 29,14 21 49.28 39. 86 IDE || 77 LEN oeeneccs 27 21.37 |— 0.18 0.00 |— 0.05 27 21.14 24 40.93 40, 21 Ease) WbiSClumM sesamin 37 29.50 |— 0.23 |-+ 0.02 |— 0.05 37 29,24 34 49. 04 40. 20 ep) (Pisemm =~---—-= =m 41 21.26 |— 0.21 |+ 0.04 |— 0.05 41 21.04 38 41.05 39, 99 E. |} @ Arietis -..--.--.-- 50 17.43 |— 0.15 |-+ 0.08 |— 0.05 50 17.31 47 37.26 40.05 E. | 50 Cassiopeia ...--. 55 18.20 |+ 0.66 |+ 0.29 |— 0.16 55 18.99 52 38.73 40. 26 Rta Anrehisie=--2es— 2 02 40.87 |— 0.13 |+ 0.11 |— 0.05 | 2 02 40.80 | 2 00 00.69 | — 2 40.11 NORMAL EQUATIONS. 0=-+ 0.63 + 8.00 dt + 0.03 a 0=-+ 2.51 + 0.03 dt + 6.30 a a=— 05.40 Adopted o= -+ 0.05 for W. ASTRONOMICAL STATION—GUNNISON, UTAH—1872. 115 The following tables show the corrections and rates of the chronom- eters used at Gunnison and Salt Lake City: CHRONOMETER AT GUNNISON.—Necus, No. 1491. Local sidereal| Correction of chro- | Adopted hourly Date. time. nometer. rate, 1872. h. him. “8. 8. Oct. 23 0.1 — 219 40.78 Oct. 25 0.0 39.24 Ana Oct. 31 0.0 26. 25 a 0,099 Noy. 1 0.3 23. 86 0. 071 Nov. 5 0.5 16.71 sry 0. 195 Nov. 6 0.5 — 219 13.70 set CHRONOMETER AT SALT LAKE CITY.—Necus, No. 1511. Date. Local sidereal | Correction of chro- Adopted hourly time. nometer. rate. 1872, h. hom 8. 8. Oct. 23 23.0 — 0 02 38.12 Oct. 95 22. 4 40, 92 st He Oct. 31 93.8 42. 10 aE oid Nov. 1 23. 8 41.77 2 0.011 Nov. 5 93.5 40. 75 er Nov. 6 0.0 — 0 02 40.05 SEs Final results of longitude. 3. (IIe Mean ofsig- es = : Signals sent from—{ Recorded at— |nalssent and|_!™e-correc-| Corrected gs $g 2 § . tions. time i a received. ‘ 5 wo 2s g ae 8 $ a~ fe = October 23, 1872: ean es a Led him. 8. ee i hom 8 8 |he m8. ; alt Lake City. 18,51 |—0 02 38.18 40. 38 Salt Lake City.) | Gonnison..... 2 29 39.05 2 19 40.78] 0 09 58.27] 0 00 17.94 eae yet Salt Lake City.| 0 21 08.62 |—0 02 38.19] 0 18 30.43 senses Gunnison...-..] 2 38 29.13 |—2 19 40.77] 0 18 48.36 17.93]....| 0 00 17.935 October 31, 1872: SoG aes : : alt Lake City.| 0 39 28.98 |—0 02 42.09] 0 36 46.89 Bale Sake Cytye sl @annieonee 2 2 56 31.09 |—2 19 26.19] 0 37 04.90 18.01 Gr ieons Salt Lake City | 0 46 03.22 |—0 02 42.69] 0 43 21.13 aobec= Gunnison...-..] 3 03 05.26 |—2 19 26.14] 0 43 39.08 17.95]... 17. 980 November 1, 1872: Boe ws ne “ad : : ; salt Lake City.| 0 37 21.66 |—0 02 41.77] 0 34 39.89 Salt Lake City _ Gunnison...... 2 54 21.52 |-2 19 23.84] 0 34 57.68 17.79 eencs Salt Lake City.| 0 44 09.97 |_0 02 41.77] 0 41 28.20 EEO occa ce Gunnison...... 3 01 09,82 |—2 19 23.83] 0 41 44.99 2 9| pee 17.790 sere tee D 1GTe Salt Lake City.| 0 46 18.32 |_0 og 40.72] 0 43 37.60 : alt Lake City. . 32 |—0 02 40.72) 0 43 37.6 Salt Lake City sf Gunnison...... 3 03 12.04 |—2 19 16.64 0 43 55.36 17.76 ee Salt Lake City] 0 59 45.04 |—0 02 40.71] 0 57 04.33 ISON ao= =< } Gunnison...... 3 16 38.77 |—2 19 16.66] 0 57 22.11 Ta llpece 17.770 November 6, 1872: Benen Ge ‘ c = alt Lake City.) 0 55 31.06 |—0 02 40. 02] 0 52 51.04 Salt Lake City i) Gunnison...... 3 12 22.56 |—2 19 13,65] 0 53 08.91 17. 87 “ Geen Salt Lake City-] 1 02 05.48 |—0 02 40. 09] 0 59 25.46 ssiceec Gunnison...--.| 3 18 56.87 |—2 19 13.64] 0 59 43.23] 0 00 17.77]....| 0 00 17.820 . Gunnison east of Salt Lake City.........--. 0b 00™ 175.86 + 03,028. 116 ASTRONOMY. Observations and computations for latitude. GUNNISON, UTAH. Level. Corrections. Number | Microm. % Half-sum of : Date. of star. | readings. Remarks. declination. Micron Latitude. “ : N. Ss. at ene Level. 1872. te d. d. OF ett Chae 2H i eet November s’. 7281 10.808 | 18.0 | 16.9 7275 | 14.113 | 18.8 | 15.7 39 07 10.8 |4 2 13.6 |41.5 | 39 09 25.8 7476 6.688 | 13.3 | 22.1 7450 19.543 | 19.9 | 15.7 00 49.8 |+ 8 39.5 |—1.6 27.7 7637 24, 057 |-24.0 | 28.3 7586 21.141 | 30.1 | 22.4 11 21.2 |— 1 57.7 |4+1.2 24.7 7642 21.006 | 24.0 | 23.3 7571 17.340 | 30.1 | 22.4 39 11 54.4 — 2 28.1 |41.2 27.5 7848 6.515 | 20.3 | 31.1 7807 21.593 | 31 5 | 20.5 33 59 15.9 |+10.09.3 | 0.0 25.2 7961 105772) | 2250 |) 2953 7945 19. 030 | 28.1 | 22.8 39 03 53.9 |+ 5 33.6 |—0.7 26.8 8107 25.117 | 29.6 | 23.0 8079 8.245 | 24.9 |. 27.7 20 47.9 |—11 21.8 |41.3 27.4 80 22.490 | 30.5 | 25.5 101 22.238 | 31.4 | 24.2 09 33.1 — 0 10.2 |4+4.3 27.2 201 11. 420 | 37.3 | 17.8 178 4.828 | 26.4 | 29.0 13 48.6 — 4 26.4 |+6.0 28.2 201 11, 420 | 37.3 | 17.8 215 20.731 | 24.0 | 31.0 03 06.5 |-+ 6 16.3 |+4.3 27.1 283 19. 876 | 29.5 | 25.5 259 12.699 | 30.0 | 25.0 14 13.0 |— 4 50.0 |+3.2 26.2 450 21.589 | 24.0 | 20.8 370 17.734 | 25.1 | 29.5 11 59.8 — 2 35.8 |—0.4 23.6 628 14. 463 | 29.0 | 25.0 576 18. 467 | 27.0 | 27.0 06 42.0 |+ 2 41.8 |+1.4 25.2 628 14. 463 | 29.0 | 25.0 580 12.911 | 27.0 | 27.0 10 26.5 |\— 1 02.7 |41.4 25.2 653 15. 823 | 25.3 | 28.6 647 14. 660 | 28.2 | 25.0 39 10 12.1 |— 0 47.0] 0.0 25.1 695 5. 062 | 34.2 | 18.0 682 22.360 | 24.0 | 30.4 38 57 41.2 |+11 38.8 |+3.4 23.4 November 15 7477 12. 313 | 28.0 | 20.5 7399 19,533 | 19:9 | 27.9 29 04 32.8 [4+ 4 51.8 |—0.2 24,4 7637 25.007 | 29.0 | 20.3 7586 22.047 | 24.0 | 25.4 11 54.4 |— 2 29.2 |42.8 28.0 7683 18.794 | 26.5 | 23.3 7712 11. 476 | 26.1 | 23.9 39 14 18.5 |— 4 55.7 [41.9 | 39 09 24.7 LATITUDE DETERMINATIONS. Observations and computations—Continued. GUNNISON, UTAH. 117 Level. Corrections. Number | Microm. a Half-sum of A Date. of star. | readings. Remarks. declination, Micron Latitude. N. Ss. eral syesoe Level. 1872. ts d. d. is) Ey “ RS LY Paliatsio ti) re November 15 7749 27. 163 | 28.1 | 21.6 7712 | 11.476 | 26.1 | 23.9 39 19 55.9 |—10 33.9 |43.1 | 99 09 25.1 7915 16. 256 | 26.0 | 25.9 7931 13. 833 | 28.0 | 24.2 19 59.7 |— 1 37.9 |41.4 23. 2 8107 26.218 | 31.8 | 22.9 8079 9,291 | 25.3 | 29.1 20 48.4 |—11 24.0 |4+2.0 26.4 8261 19. 415 | 33.5 | 22.3 8211 10.398 | 26.1 | 29.0 15 23.7 |— 6 04.4 |42.9 PUP. 80 21.757 | 34.2 | 22.7 101 21.421 | 30.5 | 26.7 09 34.1 |— 0 13.6 |+5.6 26.1 152 21.251 | 37.0 | 19.6 158. 13. 236 | 26.5 | 30.3 14 43.1 |— 5 23.9 |+4.8 24.0 201 9. 067 | 31.8 | 25.5 215 18. 223 | 35.2 | 21.9 03 07.5 |-++ 6 09.9 |--7.0 24.4 283 19.638 | 41.4 | 16.8 259 12. 422 | 24.0 | 33.7 14 14.1 |— 4 51.6 |+5.2 PLBE 318 14, 255 | 31.8 | 26.7 334 18.585 | 35.2 | 23.2 06 24.2 I+ 3 55.0 |46.0 2552) 416 10. 638 | 35.1 | 23.8 Ps 427 20. 830 | 20.2 | 38.5 02 35.4 |-+ 6 51.9 |-2.8 | 24.5 515 25. 600 | 38.5 | 21.2 431 17. 651 | 20.2 | 38.5 14 47.0 |— 5 21.2 |-0.4 25.4 653 14. 870 | 34.8 | 25.6 647 13. 644 | 27.2 | 32.6 39 10 13.2 |— 0 49.5 |41.3 25.0 714 6. 367 | 35.6 | 24.0 752 22. 259 | 24.7 | 35.6 38 58 44.1 |+10 42.2 |+0.3 26.6 816 22.931 | 32.0 | 28.4 796 7.661 | 29.9 | 30.8 39 19 43.0 |—10 17.1 |+1.0 26.9 1007 24. 633 | 31.0 | 30.3 ¥ 974 23.158 | 30.7 | 30.7 39 10 23.8 |— 0 59.6 |+0.3 24.5 1043 9.153 | 31.8 | 29.8 1025 23.395 | 30.7 | 30.9 38 59 50.8 |-+ 9 35.5 |+0.6 26.9 1254 23. 367 | 31.1 | 28.0 1265 7. 887 | 29.0 | 30.7 39 19 49.4 |—10 25.6 |4+-0.5 24.3 1301 22.512 | 32.8 | 27.2 1265 7. 887 | 29.0 | 30.7 19 13.3 |— 9 51.0 |+-1.4 23.7 1504 17.575 | 37.8 | 26.0 e 1528 13.790 | 27.0 | 34,1 39 11 56.7 I— 2 33.0 141.7 | 39 09 25,4 118 ASTRONOMY. Observations and computations—Continued. GUNNISON, UTAH. Level. Corrections. Half-sum of declination. Mater Number | Microm. of star. | readings. Remarks. Latitude. Microm. and refr. Level. A d. B o} ‘if “ ‘ a“ u o-/ a“ 24.990 | 32.0 bil 20.163 | 32.1 i) 39 12 38.6 |— 3 15.1 |+1.7 | 39 09 25.2 15. 831 | 34.9 a) 17.209 | 29.0 bi) 08 29.7 |+ 0 55.7 |+1.3 26.7 13. 235 | 43,0 Ae) 12. 271 | 16.6 hdl 10 06.9 |— 0 39.0 |—1.5 26.4 13.266 | 20.5 0 7204 12. 811 | 19.0 SZ 09 48.0 |— 0 18.4 |—-2.5 27.1 7281 12. 273 | 17.5 | 27.2 7275 15. 736 | 22.0 | 27.7 07 10.3 |+ 2 19.9 |—5.3 24.9 7411 22. 308 | 23.6 | 22.9 7368 5. 852 | 20.7 | 25.0 20 32.1 |—11 05.0 |—1.3 25.8 7476 11. 020 | 31.8 | 15.1 7450 23.778 | 19.0 | 27.5 00 49.7 |4+ 8 35.4 |4+2.8 27.9 7559 18.219 | 26.0 | 21.0 7566 23. 022 | 24.2 | 23.0 39 06 08.4 |4+ 3 14.0 |42.2 24.6 7848 8.652 | 37.4 | 12.5 7807 23.694 | 17.4 | 32.7 38 59 16.2 |4+10 07.9 |43.4 27.5 8212 11.165 | 27.6 | 15.7 8195 21.559 | 23.5 | 20.0 39 02 21.2 |4+ 7 00.0 |+5.6 26.8 80 21.440 | 35.1 | 10.0 101 21.150 | 15.3 | 30.2 09 34.3 |— 0 11.7 |43.6 26.2 180 18.970 | 37.5 | 09.0 164 13,172 | 18.0 | 28.5 13 13.6 |— 3 54.3 |+6.3 25. 6 227 9, 752 | 22.9 | 23.9 259 14,831 | 22.8 | 24.4 06 00.1 J+ 3 25.2 |—0.9 24.4 283 22.071 | 29.7 | 17.7 259 14. 831 | 22.8 | 24.4 39 14 14.3 |— 4 52.6 |+3.6 25.3 416 10.519 | 25.8 | 23.0 427 20. 686 | 24.2 | 24.0 37 02 35.9 |+ 6 50.9 |4+1.0 27.8 515 25. 490 | 29.7 | 20.0 431 17.511 | 24.2 | 24.6 39 14 47.2 |— 5 22.4 [43.5 28.3 525 20. 309 | 28.0 | 21.7 556 10. 074 | 24.5 | 25.9 16 17.8 |— 6 53.5 |+1.7 26.0 628 19.780 | 28.6 | 22.3 580 18, 217 | 24.9 | 25.6 39 10 27.8 j— 1 13.2 |-+-1.9 26.5 695 4.927 | 30.0 | 19.0 682 22.253 | 21.6 | 29.9 38 57 42.8 4-11 40.1 141.0 139 09 23.9 Date. 1872. November 16 November 18) November 1 LATITUDE DETERMINATIONS. Observations and computations—Continued. GUNNISON, UTAH. 119 Level. Corrections, Number | Microm. Half-sum of j C of star. | readings. Remarks. declination. Micron Latitude. N. pial seis Level. 2 d. ou “ / “ “ | tf ti} 714 7.780 | 24.9 | 26.0 752 23. 603 | 29.6 | 21.9 38 58 44.3 |-+10 39.4 |+2.3 | 39 09 26.0 829 20.910 | 29.9 -5 877 21.817 | 22.5 .3 39 08 46.0 |-+ 0 36.7 |+0.5 23.2 7637 24,702 | 18.2 8 7627 6.170 | 13.2 .0 39 21 55.8 |—12 28.9 |—0.5 26.4 7642 21.717 | 18.5 .0 7526 21. 952 | 10.1 | 22.0 39 09 18.7 |+ 0 09.5 |-2.8 25.4 7683 18. 943 | 24.1 BY) 7712 11. 735 | 23.9 -o 14 18.4 |— 4 51.3 |—0.1 27.0 7749 27. 267 | 22.3 ral] 7712 1735) P2339 .3 19 55.9 |—10 27.6 |—1.7 26.6 7882 9.877 | 29.0 6 7914 21. 053 | 24.8 28 01 52.1 |+ 7 31.6 |41.9 25.6 7961 12.702 | 27.0 .6 7945 20.936 | 25.0 Bs) 03 54.5 |+ 5 32.7 |+0.3 27.5 8107 25.520 | 25.0 6 6079 8. 623 | 26.9 Be 20 48.6 |—11 22.8 |—0.5 Rowe 8212 11. 242 | 29.9 4 8195 21.717 | 24.2 6 02 21.3 |-+ 7 03.3 |+0.7 20:3 80] 21.604 | 29.7 | 25.9 101 21. 363 | 29.6 0 09 34.4 |— 0 09.7 |+2.6 27.3 180 18.961 | 35.0 HS 164 13. 250 | 25.3 ba 13 13.8 |— 3 60.8 |+3.4 26.4 227 8.553 | 29.1 9 259 13. 630 | 28.0 33 06 00.2 |+ 3 25.2 |41.4 26.8 318 13. 890 | 28.9 HY) 334 18. 300 | 30.2 bal 06 24.6 |-+ 2 58.2 |4+2.5 25.3 7642 21.733 | 26.3 5.4 - 7586 21.889 | 17.4 | 23.8 09 18.6 |+ 0 06.3 |+-1.6 26.5 7653 19. 972 | 22.0 0 7712 12. 683 | 22.2 .8 14 18.4 |— 4 54.6 [41.5 25.3 7749 28. 260 | 17.0 0 7712 12. 683 | 22.2 8 39 19 55.9 |—10 29.5 |-1.9 24.5 7848 7.156 | 22.6 4 7807 22.303 | 19.0 .0 38 59 16.2 |+10 12.1 |—1.0 27.3 7882 10. 071 | 20.0 pal 7914 21.248 | 24.7 | 18.9 39 01 52.1 |-++ 7 31.7 141.0 | 39 09 24.8 120 ASTRONOMY. Observations and computations—Continued. GUNNISON, UTAH. Date. 3872. November 19 November 20) Level. Corrections. Number | Microm. ; 2 Half-sum of | - of star. | readings. Remarks. | declination. Microm Latitude. N. Ss. | dearer Level. t d. d. fe} ’ “ i au ” ri “ 7945 21.297 | 19.9 | 24.0 7961 13. 063 | 28.7 | 20.2 | 39 03 £4.5 |4+ 5 32.7 |—0.2 | 39 09 27.0 8107 25. 304 | 25.6 | 20.3 | 8079 8.361 | 23.2 | 22.5 20 48.6 |—11 24.7 |42.1 26.0 8212 MASAO. 7 |) 1952 8195 21. 891 | 20.0 | 26.9 39 02 21.3 J+ 7 02.5 |40.6 24.4 8231 18, 247 | 24.4 | 22.2 8256 13. 014 | 24.7 | 22.2 39 12 54.0 |— 3 31.5 |41.7 24.2 80 22.539 | 30.6 | 18.2 101 22,284 | 21.0 | 27.9 09 34.6 |— 0 10.3 |4+2.0 26.3 152 22,245 | 23.7 | 24.6 158 14, 337 | 26.3 | 21.0 14 43.5 |— 5 19.6 41.5 25.4 120 20. 229 | 37.7 | 25.6 164 14.527 | 28.0 | 36.7 13 13.8 | 3 50.4 |41.4 24.8 201 12, 412 | 29.8 | 30.7 215 21.676 | 33.1 | 27.1 03 08.0 |+ 6 14.4 |+1.8 24,2 283 20. 247 | 28.0 | 20.2 259 13.917 | 23.3 | 24.8 14 14.7 |— 4 52.2 |42.2 24.7 318 | 14.757 | 21.4 | 26.2 7 304 19, 142 | 30.2 | 18.0 06 24.8 [+ 2 57.2 |42.8 24.8 450 23. 457 | 34.8 | 14.9 & 370 19.509 | 22.0 | 25.9 11 59.8 |— 2 39.5 |+5.6 25.9 676 8.504 | 31.0 | 19.8 656 21.440 | 24.5 | 26.5 00 39.8 |4+ 8 42.7 |43.2 25.7 316 24.697 | 30.2 | 21.1 796 9,300 | 27.0 | 24.0 19 44.1 |—10 22.2 |44.2 26.1 916 15 225 | 35.4 | 16.0 888 13.751 | 23.0 | 28.5 10 23.3 0 59.6 |44.9 28.6 1007 24,522 | 35.4 | 15.8 974 22,992 | 23.3 | 28.2 39 10 24.4 |— 1 01.8 |45.2 27.8 1043 9.143 | 38.0 | 13.2 1025 23. 267 | 16.8 | 34.6 38 59 51.4 |4+ 9 30.8 |4+2.4 24.€ 7637 23.580 | 26.4 | 16.8 7627 4.870 | 22.0 | 21.0 39 21 55.7 |—12 26.1 |4+3.7 23.3 7662 20.545 | 26.5 | 16.7 7571 16.771 | 20.7 | 22.1 11 54.4 |}— 2 32.5 |4-2.9 24.8 7642 20.545 | 26.5 | 16.7 7586 20. 602 | 20.8 | 22.0 09 18.6 |4+ 0 02.3 [43.0 139 09 23.9 Date. 1872. November 20 Number of star. 7683 7712 7749 7712 7848 7807 7882 7914 7961 7945 8107 8079 8231 8256 80 101 201 215 227 259 283 259 330 321 416 431 525 506 628 580 653 647 695 682 714 752 829 877 LATITUDE DETERMINATIONS. Observations and computations—Continued. GUNNISON, UTAH. 121 Microm. readings. t. 19, 277 11, 946 27. 582 11. 946 7. 417 22, 442 10. 289 21. 409 12.701 20. 908 25. 865 8, 983 19, 885 14, 677 21.561 21.175 13. 386 2. 650 9. 609 14, 656 21. 866 14, 656 5.575 23, 965 9. 261 16. 093 18, 840 8. 55u 19, 462 17. 862 16, 237 14, 945 6. 982 24, 220 6, 673 22. 555 19. 199 20. 035 | | Level. ES Yi 2 [od on ar) Po oo” ~2 wy ie} ww bas 2 Xa 2% Ro} Ro) x a fon H wo ww WD OS ASU ea iss S . (=) we 0 cS) a on oo © S52) SIS NS OOo OCW CR CHW ON CH ON OD 0 o9 gel Oo wr Www ECD wo (J) @ oO a @ wo wo SS £5 03 0 ou a ce 2 ie) eo 2 (5) We 0) on cS ow) [=r Remarks, Corrections, and refr. G2 je Ui TA Woy PL 39 14 18.3 |— 4 56.3 |42.5 | 39 09 24.5 39 19 55.9 |—10 31.9 |4+2.1 26.1 38 59 16.3 |+10 07.2 |+1.8 25.3 39 01 52.1 J+ 7 32.6 |41.3 26.0 03 54.5 | 5 31.6 |—1.3 24.8 20 50.7 |—11 22.2 |-0.1 28.4 12 54.1 |— 3 30.4 |—0.8 22.9 09 34.7 |— 0 15.6 |+4.2 23.3 03 08.0 |-+ 6 14.4 |+3.6 26.0 06 00.2 |+ 3 24.0 |+3.8 28.0 39 14 14.8 |— 4 41.4 |43.8 27.2 38 57 00.9 |4-12 23.1 |+1.8 25.8 39 04 44.7 |4 4 36.0 47.8 28.5 16 18.3 |— 6 55.8 |+1.8 24.3 10 28.4 j— 1 04.7 |+1.3 25.0 39 10 13.9 |— 0 52.2 |42.8 24.5 38 57 43.0 |-+11 36.6 |+3.1 22.7 | 38 58 44.9 |+10 41.8 /+1.7 28.4 39 08 46.5 |+ 0 33.8 [+3.4 | 39 09 23.7 122 ASTRONOMY. Observations and computations—Continned. Date. 1872. November 20 November 22) Number of star. Microm. readings. 10.319 20.514 20. 644 15. 007 17.500 13. 673 16. 172 11.201 10. 606 5, 852 25. 0X3 6, 422 22. 053 18. 279 22. 053 22. 093 19. 951 12. 557 7.313 22. 350 9. 420 20.574 12.543 20.740 25. 722 8.752 20, 855 9. 290 11. 204 21.723 22. 358 22. 094 19, 999 12. 129 GUNNISON, UTAH. Level. N. Ss. d. d. 24.1 | 39.0 42.1 | 21.7 25.0 | 39.2 43.5 | 30.6 26.1 | 24.3 Pass t) || Pay 33.0 | 27.0 22.9 | 27.6 29.5 | 20.5 24.5 | 25.6 24.0 | 25.8 33.2 | 16.0 30.0 | 19.0 25.0 | 24.3 30.4 | 12.0 18.0 | 24.2 30.4 | 12.0 7G 2307 30.4 | 12.0 18.0 | 23.3 26.2 | 32.1 41.2 | 17.7 31.0 | 28.9 31.7 | 28.0 31.6 | 27.9 30.8 | 28.4 26.0 | 36.0 30.3 | 29.1 38.0 | 24.4 28.0 | 34.3 33.1 | 28.8 30.6 | 31.7 33.9 | 28.8 30.2 | 32.1 30.7 | 33.2 37.2 | 26.9 35.1 | 28.6 29.6 | 34.1 Remarks. Corrections. Half-sum of declination. Riseran and refr. ° ‘ a“ i “ 39 10 24.5 |— 0 59.1 38 59 51.6 |-4+ 9 31.5 39 02 33.7 |-+ 6 52.0 39 13 11.4 |— 3 43.7 11 57.4 |— 2 34.7 12 39.2 |— 3 20.9 12 31.6 |— 3 12.1 21 55.6 |—12 34.2 11 54.2 |- 2 32.5 09 18.5 |-4+ 0 01.8 39 14 18.2 | 453.8 38 59 16.2 |410 07.6 39 01 52.1 |4 7 30.7 03 54.5 |4+ 5 31.2 20 48,8 |—-11 25.8 17 11.2 7 47.3 02 21.5 |+ 7 01.4 09 34.9 |— 0 10.7 39 14 44.0 |— 5 18.0 Latitude. Level. LATITUDE DETERMINATIONS. Observations and computations—Continued. GUNNISON, UTAH. Date. 1872. November 22 Number of star. 201 215 261 269 416 427 515 431 525 556 628 580 695 682 714 752 829 877 916 888 1007 974 1254 1265 1292 1321 1459 1449 1494 1463 1504 1528 1546 1563 1547 1563 1583 1591 Corrections. Microm. L Half-sum of readings. Remarks. declination.| 447; ori N. and refr. |L°Vel- ihe d. d. On 4 a“ / a“ 13. 801 | 34.2 | 29.2 23.165 | 28.0 | 35.8 39 03 08.2 |+- 6 18,4 22. 359 | 31.7 | 31.7 6.043 | 39.0 | 24.3 20 17.0 |—10 59.3 9.502 | 26.9 | 37.8 19,571 | 42.1 | 22.4 39 02 36.7 |-+ 6 46.9 24,378 | 25.0 | 40.7 16. 420 | 42.1 | 22.4 39 14 48.0 |— 5 21.6 20. 334 | 30.3 | 35.0 10.101 | 41.1 | 24.3 16 18.6 |— 6 53.5 16. 449 | 27.8 | 37.2 14, 982 | 32.0 | 32.9 | 39 10 28.7 |— 0 59.3 5.466 | 11.6 | 48.3 23. 137 | 31.0 | 34.0 88 57 43.3 |411 54.1 7.964 | 31.3 | 33.2 23. 835 | 30.7 | 34.6 38 58 45.2 |+10 41.4 18.301 | 28.4 | 37.9 19, 258 | 36.7 | 29.6 389 08 46.8 |+ 0 38.7 16.508 | 34.0 | 32.0 15. 123 | 32.6 | 33.5 10 23.7 |— 0 56.0 24. 087 | 28.9 | 37.8 22. 660 | 36.0 | 30.6 10 24.8 |j— 1 57.6 22.730 | 34.9 | 24.7 7.313 | 23.2 | 36.3 19 50.4 |—10 23.0 15.973 | 30.0 | 29.9 13. 267 | 30.2 | 29,7 11 15.9 |— 1 49.4 10.535 | 26.7 | 33.3 20, 621 | 32.1 | 28.0 02 38.8 |+ 6 47.6 17, 821 | 29.0 | 31.3 12. 343 | 26.0 | 34.3 13 11.6 |— 3 41.4 17,973 | 34.1 | 26.0 14, 151 | 28.0 | 32.2 11 57.5 |— 2 34.5 17.117 | 33.8 | 26.0 12. 353 | 22.8 | 37.5 12 39.4 |— 3 12.5 19. 390 | 34.2 | 26.0 12. 353 | 22.8 | 37.5 39 14 09.1 |— 4 44.4 9.895 | 28.7 | 31.1 25, 351 | 36.2 ©) os @ 38 58 56.1 |4-10 24.6 wos 123 Latitude. 39 09 25.6 22.9 26.7 27.8 wo on an 124 ASTRONOMY. Observations and computations—Continued. GUNNISON, UTAH. Level. Corrections. Number | Microm. Half-sum of : Date. of star. | readings. Remarks. declination. | yF5675 Latitnde. N. | §. ri and refr. 1872. (my d. d. Lo} ‘ “ ‘ a“ fe} Yi} a“ Ncvember 22 1631 10. 894 | 31.0 | 29.0 1602 10.729 | 29.0 | 31.0 39 09 29.7 |— 0 06.7 39 0Y 23.6 1721 15. 694 | 32.5 | 27.7 737 17. 037 | 28.9 | 31.3 08 30.3 |+ 0 54.3 25.4 1777 17.771 | 36.5 | 23.4 1764 15. 286 | 25.0 | 35.3 39 11 07.4 |— 1 40.4 28.0 November 25 7637 22.525 | 29.2 | 16.8 7627 3.951 | 14.9 | 30.9 39 21 55.5 |—12 30.6 23.6 7642 | 19.455 | 28.5 | 17.5 7571 15.860 | 14.3 | 30.5 11 54.0 |— 2 25.3 26.9 l 7642 19. 455 | 28.5 | 17.5 7586 19. 665 | 14.3 | 30.6 09 18.4 |+ 0 08.5 7275 iL 7683 12. 854 | 25.0 | 21.4 7712 11. 684 | 16.9 | 30.3 14 18.0 |— 4 49.7 24.9 7746 12, 978 | 20.9 | 26.4 Ti57 19. 027 | 23.2 | 24.2 39 05 24.0 |+ 4 04.5 26. 2 7848 6.716 | 19.7 | 28.7 7807 21.876 | 22.9 | 25.1 38 59 16.2 |+10 12.6 24.9 7882 9.777 | 18.3 | 30.5 7914 21.050 | 28.9 | 20.8 39 01 52.1 |4+ 7 35.4 26.1 8118 20.608 | 30.0 | 23.0 $136 9, 122 | 21.7 | 31.3 17 11.3 |— 7 44.2 26.2 8212 12, 831 | 22.4 | 30.6 8195 23.399 | 27.7 | 25.3 02 21.6 |+ 7 06.7 26.3 e231 17.528 | 28.5 | 24.5 8256 12. 456 | 23.3 | 29.7 12 54.4 |— 3 25.0 28.6 80 20.945 | 24.0 | 31.0 101 20.77 30.2 | 24.9 09 35.2 |— 0 06.8 27.8 228 14. 102 | 32.0 | 23.0 211, 12.882 | 24.3) 31.0 39 10 12.3 |— 0 49.3 23.8 330 5.974 | 34.0 | 21.0 | 321 24, 423 | 19.9 | 35.0 38 57 01.0 412 25.5 25.8 | 416 9.094 | 31.8 | 23.8 | 427 19, 255 | 22.1 | 33.2 39 02 37.0 |+ 6 50.6 | 26.5 515 | 24.047 | 30.0 | 26.0 431 16. 076 | 22.1 | 33.2 14 48.4 |— 5 22.1 8 | 23.8 525 | 19.138 | 29.0 | 27.0 556 8.964 | 25.3 1 30.6 39 16 18.9 (— 6 5SL.1 39 09 26.7 LATITUDE DETERMINATIONS. 125 Observations and computations—Continued. GUNNISON, UTAH. Level. Corrections. Number | Microm. Half-sum of == - Date. of star. | readings. Remarks. declination. Mioror Latitude. N. S androGt Level. 1872. t. d. d. Om! gL es 00 YY KOR ee ts November 25 653 12.907 | 30.1 | 25.8 647 11. 728 | 22.0 | 34.0 39 10 14.6 |— 0 47.6 |—2.7 | 39 09 24.3 695 6.490 | 30.8 | 25.2 682 23. 822 | 24.5 | 31.4 38 57 43.8 |+11 40.4 |—0.4 23.8 1007 25. 182 | 29.0 | 28.7 974 23.760 | 27.0 | 31.0 39 10 25.3 |— 0 57.5 |—1.3 26.5 1043 9,659 | 27.7 | 30.2 1025 23. 892 | 28.0 | 30.0 38 59 52.3 |+ 9 35.2 |—1.6 | 39 09 25.9 The final result for latitude was obtained by Wm. A. Rogers in the same way as that of Pioche. The following are the single results of six groups: No. of ob- Means. servations. O° ‘ “ 39 09 25.76 35 25. 83 28 25. 40 29 25. 41 17 25. 64 25 39 09 25.69 45 Mean 39° 09’ 25.62. ASTRONOMICAL CO-ORDINATES OF STATION AT GUNNISON, UTAH. Longitude. .75 27™ 178.00 + 0°.028, or 111° 49/ 15.00 + 0.42 west from Greenwich. 2219™ 45.88, or 34° 46/ 13.20 west from U. 8. Naval Ob- servatory at Washing- ; ton, D. C. Watt orem set clans cc scl ces wate 39° 09! 25.62 + 0.05 north. U. 8S. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN, ist Lizut. GEO. M. WHEELER, Corps or ENGINEERS, U. 8. ARMY, IN CHARGE. RESULTS OF OBSERVATIONS MADE BY W. W. MARYATT AND JOHN H. CLARK IN THE DETERMINATION OF THE ASTRONOMICAL CO-ORDINATES OF STATION AT GREEN RIVER, WYOMING. SEASON OF 1873. COMPUTATIONS BY JOHN H. CLARK Anp Pror. T. H. SAFFORD. 127 ig ilé ‘ 4 Vis) i A GREHN RIVER, WYOMING. GEOGRAPHICAL POSITION OF STATION. Longitude, . 109° 28/ 06.57 + 0.40 west from Greenwich. 32° 25! 04/177 west from United States Naval Observatory at Washington, D. C. Latitude, . 41° 31’ 38.12 + 0”.10 north. Barometric altitude of observatory above sea-level, 6096.9 feet. Green River is a station of the Union Pacific Railroad, containing about fifty buildings, which are used as dwellings, stores, and eating-houses. It is situated on the river of the same name, in a barren valley, which is surrounded by rocky hills from 400 to 500 feet high. The astronomical pier is in the centre of the settlement, near the rail- road depot, 160.4 feet north and 213 feet east of the nearer rail of the track, which here runs to the northwest. Its position is ascertained by direct measurement to other objects in the vicinity, and by triangulation with ten sharp and well-defined rocks on the neighboring hill-tops and bluffs. METEOROLOGICAL CONDITIONS—OBSERVATORY—INSTRUMENTS. The weather was quite favorable during the time of occupation. Though generaliy cloudy during the day, it cleared away at 11 o’clock at night. The general direction of the wind was northwest. It attained its greatest force in the afternoon. The observatory was a small tent supported by a solid frame-work. The observations were made on a wooden block. The astronomical instruments were the same as those used in 1874 at Las Vegas, and described in the report on that station. The chronometer was the Negus sidereal, No. 1499. The length of telegraphic circuit from 129 9 AST 130 ASTRONOMY. Green River to Salt Lake, via Ogden, is 220 miles. There was no repeater on the route, which was over the wires of the Atlantic and Pacific and Deseret Telegraph Lines. Connection for time was made with Salt Lake City, at which point John H. Clark was observer, using the observatory of the president of the Mormon Church. Observations for longitude were made June 10, 12, 19, 20, 25, and 26, and observations for latitude on June 9, 10, 11, 12, 16, 17, 20, 21, 24, 27, 28, and 29. All observations taken at this station, by W. W. Maryatt, were reduced by Prof. T. H. Safford, who gives the following information in relation to the reduction for time: “The weights assigned to each star in the formation and solution of the least-square equations were proportioned to the square of the cosine of the star’s declination. Not having at hand the explanations on page 8 of the Report on Cheyenne and Colorado Springs when I found the values of T, it does not contain rate. The assumed rates were put into the values Di AN? Tabulation of stars used for determination of time at Green River, Wyoming, and Salt Lake City, Utah. GREEN RIVER. SALT LAKE CITY. Name of star. a Ss S } S Ss Ne} a) S s a R QR = = S — R a R ° o 2 ° CS) 2 oy ° 2 © © 2 q a =I S| S| S | a a a qa a 5 5 5 3 5 3 EI} S 3 = 3 5 tar) er) Lan) Lar) tar) Lar) Lar) er) lar) i) Lar) i=) } Lee 12 Can. Venat e Virginis OL MANETS sa5555 aoeces 20 Can. Venat G WINES sesoonoseeco Groombr. 2001 G BVirginis\ o> ---.- ===. Groombr. 2029 m Wirginis .--... .- » Urse Minoris -.- 7) WBOODISa eee eee ee 7 Virginis a Draconis « Virginis a Bootis a 6 Bootis a Bobtitvescset ccc see TENA WC Reeeeoes secd|SEseeal eoceac | hescme| essen |l~o- sel lo-aas Besaca Peeaee M€ |[escace x G INN esssssagas50s0l/s55500 x x | a 3 a BN et asosco SoSeesae Urs Minoris ..----- ASTRONOMICAL STATION—GREEN RIVER, WYO.—1873. Tabulation of stars, &c.—Continued. Name of star. GEEEN RIVER. SALT LAKE CITY. 151 June 26, B 8 02 wm Pg BYe RA BINPSARAVS _ QAMARPSONRNRRFSCDWHRTASA 9 Hereulis Bootis 48 Cephei,S.P-......... : L Bootisy.. 3-2 eke pe Serpentis Serpentis Ursz Minoris -...-.. Seorpill = 224-2 22 seee Ophiuchi Ophiuchi Herceulis.. : PCOLPHiweccscet aces IDERCONIS ses- ees eee Draconise-s. 0c. 2s. Ophiuchi Herculis Ophinchif-.-o-c- = Hereulis Oplinichiteee seers Draconis'::-/-2.. <<< Driconise=s> - 225-522 Herculis Draconis Sagittarii-.......... iHerenlismenassssceee Sagittarii....... 50 Draconis.--.-....... g L Aquilae Wylie cae St scnis cee se ad Sagittarii........-..|..... 5 Draconis ..... XXX XX ASTRONOMY. Observations and reductions for time taken at sending station. GREEN RIVER, WYOMING, JUNE 10, 1873 : | ! = | = Name of star. te Aa. Bb. Ce. BLS | AR. | AT. 5 | | he mM. | 8: 3 3. | Re We hem. 8. 8. W. | 12 Can. Venat..-.-. 12 49 49.14 |+ 0.06 |— 0.06 |+ 0.11 )12 49 49.25 |12 50 06.39 | + 17.14 Weite, Vareinis’2---)---- 55 34.78 |+ 0.52 |— 0.05 |+ 0.08 | 55 3D. 00 55 52.36 17. 03 Waal) Vircinist==.s——. = 13 03 05.70 |-- 0.74 |— 0.06 |+ 0.08 113 03 06.46 |13 03 23.60 17.14 W. | 20 Can. Venat.-.-.--. 11 35.32 |-+ 0.01 |— 0.18 |4 0.11 11 35. 26 1 52.27 17.01 W. Groombr. 2001...| 22 42.14 |— 1.82 |— 0.49 |4 0.28 22 40.11 22 57.22 17.11 W. Groombr. 2029... 33 56.24 |— 1.65 |— 0.48 |+ 0.26 33 54. 37 34 11.55 17.18 E. | 7 Urse Minoris....| 42 17.42 |— 0.23 |— 0.27 |— 0.13 42 16.79 42 34.04 17.25 Bei ig7 i Bootisienss sees 48 22.42 |4+ 0.41 |— 0.17 |— 0.09 48 22.57 48 39. 67 17.10 108 |) MAN a5 5555 54 54.58 |+ 0.64 |— 0.14 |— 0.08 54 55. 00 55 12.38 17.38 EE: |@ ‘Draconis)--=-—--- 14 06 44,80 |— 0.96 |— 0.42 |— 0.19 |14 00 43.23 |14 01 00.04 16. 81 OSs eats eases 05 51.36 |+ 0.80 |— 0.13 |— 0.08 05 51.95 06 08.78 16. 83 #5 °|"a> Bootis)-s=-----—- 09 36.60 |+ 0.40 |— 0.21 |— 0.09 09 36.70 09 53.61 | + 16. 91 | { NORMAL EQUATIONS. a = + 05.92 Co = — 08.06 ATp = 16.99 — 05,045 (T — 142.8) 0=— 0.317 + 2.776 da + 1.574 de+ 2.788d AT da = -+- 05.095 Weight of a= 1.64 0 =-+ 0.090 + 1.574 da + 12.000 de + 0.831 dAT dc = — 05.022 c= 10.99 0 = — 0.486 + 2.788 da-+ 0.831 de + 7.646 dAT dAT=-+ 05.031 AT= 4.80 GREEN RIVER, WYOMING, JUNE 10, 1873. Name of star. Jt Aa. Bb. Ce. 4H AR. AT. hams | (8: hy 8. oe hm, 8. hom. 8. 8. a Serpentis .....--. 15 37 45.52 |+ 0.44 |— 0.28 |— 0.03 |15 37 45.65 |15 38 02.53 | + 16.88 e Serpentis --...--- 44 13.26 |4+- 0.46 0.29 |— 0.03 44 14,00 44 30.94 16. 94 ¢ Urs Minoris.---- | 48 31.72 |— 2.22 |— 1.48 |— 0.15 48 27.87 48 44.68 16. 81 Groombr. 2820..../16 05 47.72 |— 0.91 |— 0.92 |+ 0.09 |16 05 45.98 |16 06 02.72 16.74 @ HMercolis) ----—.--- 15 41.18 \— 0.10 |— 0.35 |+ 0.05 15 40.7 15 57.73 16. 95 ¢ Ophichi..-.-.--..} 29 54.46 |+ 0.61 |— 0.05 |4 0.03 29 55. 05 30 11.90 16. 85 7 Herculis --......- (16 38 17.74 |+ 0.04 |— 0.10 |4+ 0.04 |16 38 17.72 |16 38 34.73 | + 17.01 NORMAL EQUATIONS. dp = + 05.92 Co = — 05.06 AT» = 168.99 — 05.045 (T — 142.8) 0 = + 0.293 + 1.866 da + 0.279 de-+1.615dAT da = — 05.160 Weight of a=1.21 0=— 0.170 + 0.279 da + 7.000 de — 0.624d AT de = + 05.028 c=6.69 O= + 0.285 + 1.615 da — 0.624 de + 4.201 dAT dAaT=— 05.002 AT=2.70 TIME DETERMINATIONS. 133 Observations and reductions for time taken at sending station—Continued. GREEN RIVER, WYOMING, JUNE 12, 1873. 2 EI Name of star. AM Aa. Bb. Ce. 406 AR. AN 5 hom. 8. 8. 8. 8. hems as hom 8. 8. W. | 20 Can. Venat.* ..../13 11 32.54:/ 0.00 |— 0.19 |— 0. 12 |13 11 32,23 13 11 52.24 | + [20.01] Ww. Groombr. 2001 ..| 22 39.84 |— 1.12 |— 0.47 |— 0.31 22 37.94 22 57.10 19, 16 Ww. Groombr. 2029... 33 53.94 |— 1.01 |— 0.48 |— 0,29 33 52.16 34 11.45 19. 29 W.| 7 Ursw Majoris....| 42 15.18 |— 0.14 |— 0,30 |_ 0.14 42 14, 60 42 34,00 19. 40 \ioillitg”® Lelertaish o555 nodose 45 20, 22 |+ 0.25 |— 0.20 |— 0.10 48 20.17 48 39.66 19. 49 Ad | Ta Vantin See eee 54 52.84 |+ 0.39 |— 0.15 |— 0.09 54 52.99 bay IPAS) 19. 38 ee) Draconiseesnses= 14 00 41.62 |— 0.59 |— 0,49 |+ 0.21 |14 00 40.75 |14 00 59.98 19523 tee Varcinistesesee os 05 49.06 |+ 0.49 |— 0.15 |+ 0.09 05 49. 49 06 08.78 19. 29 Bena WGootismess saccee 09 34.02 |+ 0.24 |— 0.24 |+ 0.10 09 34.12 09 53. 60 19, 48 in |e bootisieeseee eee 20 35.70 |— 0.19 |— 0.40 |+ 0.15 20 35, 26 20 54.61 19. 35 E. | 5 Urse Minoris... 27 36.58 |— 1.49 |— 0.88 |+ 0.38 27 34.59 27 54.25 19. 66 BS |e) Bootis; press sce 34 27.80 |+ 0.27 |— 0.24 |+ 0.09 34 27.92 34 47.04 19, 12 Doll WwW iescsa6 ease 39 09.00 |+ 0.17 |— 0.29 |+ 0.10 |14 39 08,98 |14 39 28.18 + 19.20 “Not good; note by Mr. Maryatt. NORMAL EQUATIONS. Ay = + 08.72 Co = -+ 08.09 AT. = 198.32 — 08,071 (T — 154.3) 0= + 0.398 + 2.594 da + 0.808 de + 1.902 dA T da—=— 05.098 Weight of a= 2.04 0 = + 0.218 + 0.408 da + 12.000 de+ 1.851 dAT dc= 08.000 e— ras 0=- 0.688 -+ 1.902 da-+ 1.851 de + 6.653 dAT dAT=— 02.075 v— yl) GREEN RIVER, WYOMING, JUNE 12, 1873. s a a Name of star. T. Aa. Bb. Ce. T’. AR. AT. 5 is ans 18: oh 8. 8 Tie ss hom. 8. 8. E. Groombr. 2320. ../16 05 44,96 |— 1.00 |— 0.76 + 0.24 /16 05 43.44 |16 06 02.69} + 19.25 Eoi|-e)) Ophinehiess. 2222 11 18,32 /+ 0.60 j— 0.22 |4- 0.09 11 18.79 11 37.97 19.18 Blige Herculise-se eee 15 39,24 |— 0.10 |— 0.47 |+ 0.13 15 38.80 15 57.72 18. 92 Bis)|) a) SCorpiin sce ences” 21 19.40 |+ 0.86 |— 0.13 |+ 0.10 21 20.23 21 39.43 19. 20 Hy. | ¢ Ophiuchi........ 29 52.12 |+ 0.66 |— 0.18 |+ 0.09 29 52.69 30 11.91 19. 22 W.| 7 Herculis ........ 38 15.92 |+ 0.04 |— 0.32 |— 0.12 38 15. 52 38 34.74 19, 22 W.| 49 Herevlis .....-.. 46 00.48 |+ 0.38 |— 0.22 |— 0.09 46 00.55 46 19.83 19. 28 W.| « Ophiuchi........ 51 21.73 |-+ 0.45 |— 0.21 |— 0.09 51 21. 93 51 41.25 19, 32 W.| e Urs® Minoris..../16 58 59.61 |— 4.01 |— 1.35 |— 0.68 |16 58 53.57 16 59 13.16) + 19.59 NORMAL EQUATIONS. Ay = + 08,72 Co = + 08,09 ATo = 198.32 — 08,071 (T — 154.3) 0 = — 0.286 + 3.108 da + 1.530 de + 2.985 dAT 0 =— 0.158 + 1.530 da + 9.000 de + 1.077 dAT 0 = — 0.218 + 2.985 da + 1.077 de + 5.900 dAT da = +- 05.110 de = + 05.001 daT =— 05,020 Weight of a—1.48 c=8.19 AT=3.0L 134 ASTRONOMY. Observations and reductions for time taken at sending station—Continued. GREEN RIVER, WYOMING, JUNE 19, 1873. a ' 3 Name of star. a: Aa. Bb. Ce. Te AR. AT. a h.m. 8. 8. 8. & |h.m 8 |hem. 38. 3. E. | 7 Ursx Majoris..-.|13 42 02.14 |— 0.15 |+ 0.01 |+ 6.11 |13 42 02.11 |13 42 33.87 + 31.76 E. | 7 Bootis 48 07.38 |+ 0.27 |+ 0.16 |+ 0.07 48 07.88 48 39. 60 31.72 E.|7 Virginis -| 54 40.24 |4+ 0.43 |+ 0.07 |-+ 0.07 54 40. 81 5d 12.33 31.52 E. | @ Draconis....-...|14 00 28.62 |4+ 0.64 |4+ 0.05 |4+ 0.16 14 00 28.19 |14 00 59.74 31.55 E. | a@ Bootis -.-------. 09 21.54 |— 0.27 |— 0.04 |— 0.07 09 21.84 09 53.55 31.71 W.| 8 Bootis ---.------ 20 23.40 |— 0.21 |— 0.08 |— 0.11 20 23.00 20 54. 48 31.48 W.| 2 Bootis, pr ------.| 34 15.10 |4 0.29 |4+ 0.04 |— 0.07 34 15.36 34 47.00 31. 64 W.|e Bootis ..........| 38-56.26 |+ 0.18 |+ 0.08 |— 0.08 38 56. 44 39 28.13 31. 69 W.| a? Librw..--.-----.| 43 20.66 |+ 0.59 |4 0.05 |— 0.07 43 21.23 43 52.85 31. 62 W.| 8 Urse Minoris....| 50 39.80 |— 1.40 |4+ 0.40 |— 0.26 50 38.54 51 10.24 31.70 W.| 6 Librez-...-.-.--.. 15 09 39.96 |+ 0.53 |+ 0.08 |\— 0.07 |15 09 40.50 |15 10 12.12 + 31.62 NORMAL EQUATIONS, do=+082:78 gm =+0305 ATyo=315.55— 08.045 (T — 154.9) 0 =-+ 0.234 + 2.729 da — 0.690 de + 3.004 dAT da =— 02.103 Weight of a= 1.51 0 = — 0.252 — 0.690 da + 11.000 de — 0.718 dAT de = + 05.018 c= 10.82 0=+0.174 + 3.004 da— 0.718 de4+7418dAT dAT=- 0.020 iss 4h GREEN RIVER, WYOMING, JUNE 19, 1873. a EI Name of star. 1, Aa. Bb. Ce. a. AR. AT. S hm. 8. 8. 8. 8 |hom 8. |h.m. 8. 8. W.| 7 Herculis ...---.. 16 38 03.08 |+ 0.04 |+ 0.14 |— 0.12 16 38 03,14 |16 38 34.74 + 31.60 W.| 49 Herculis ..---..- 45 48.06 |+ 0.36 |+ 0.09 |— 0.10 45 48, 41 46 19.87 31. 46 W.| e Urse Minoris.-..| 58 45.12 |— 3.79 |+ 0.43 |— 0.74 58 41. 02 59 12. 82 31. 80 W.ja@ Hercolis .--.-...- 17 08 21.40 |+ 0.37 + 0.06 — 0.10 17 08 21.73 |17 08 53.36 31. 63 W:° | 44 Ophiuchi.-.-.---. 18 06.94 |+ 0.78 |+ 0.04 |— 0.10 18 07. 66 18 39.10 31. 44 W.| 3 Draconis .--.-.-.| 27 05.14 |— 0.24 |4 0.18 |— 0.16 | 27 04.92 27 36.36 31. 44 E. | a Draconis ......-- 37 14.80 |— 1.00 |4 0.21 |4 0,26) 37 14.27 | 37 45.53 31. 26 E.|o Herculis ....---. 18 02 05.58 |+ 0.20 |— 0.12 |4 0.11 18 02 05.77 |18 02 37.33 31. 56 TOR) AGED. odop sees 27 47.64 |+ 0.60 |— 0.09 |4 0.10| 2748.25] 2819.72) + 31.47 NORMAL EQUATIONS. do= +0878 co=+0805 ATp= 315.55 —05045 (T— 15" 9) 0 = — 0.053 + 2.539 da — 0.482 de + 2.311dAT da=-+ 05.005 Weight of a= 1.56 0 = — 0.349 — 0.482 da + 9.000 de — 2.139 dA T de = + 08.045 e =8.08 0 = — 0,066 + 2.311 da — 2.139 de + 5.573 dAT dAST = + 05.027 TIME DETERMINATIONS. 13s Observations and reductions for time taken at sending station—Continued. GREEN RIVER, WYOMING, JUNE 20, 1873. Clamp. Name of star. Me Aa. Bb. Ce. ae AR. AT. h.m 8. 8. 8. 8. hemi +. 93 hm. 8. 3. Hiya Tens eee eee soe 14 05 37.66 |— 0.36 |+ 0.02 |+ 0,04 |14 05 37.36 |14 06 08.73 + 31.37 Hin Ge bootign ecu eecs 09 22.20 |— 0.18 |+ 0.03 |+ 0,04 09 22. 09 09 53.55 31. 46 Bade Boonish sess se 20 22.96 |+ 0.14 |+ 0.04 |+ 0.06 20 23. 20 20 54. 46 31, 26 E. {5 Urse Minoris-...| 27 21.08 |+ 1.10 |+ 0.06 |+ 0,15 27 22. 39 27 53.74 31.35 ay kage BOOhISHesee eee ae 34 15.78 |— 0,20 |+ 0.01 |+ 0.04 34 15.63 34 47.00 31. 37 Welle: (Bootisn se cee 38 56.82 |— 0.12 0.00 |—- 0,04 38 56. 66 39 28. 12 31. 46 Wieala? Duibreak, sees oe 43 22.02 |— 0.40 0.00 |— 0,04 43 21.58 43 52. 84 31. 26 W.| 8 Urs Minoris....| 50 38.40 |+- 0.95 |— 0.03 |— 0.13 50 39.19 51 10.18 30. 99 W.] hilbreap. sesso. 3 15 09 41.12 |— 0.36 |— 0.02 |— 0.04 |15 09 40.70 |15 10 12.12 31. 42 W.| y Urse Minoris....| 20 28.92 |+ 0.77 |— 0.09 |— 0.12 20 29. 48 21 01.10 + 31.62 NORMAL EQUATIONS. A = — 05,40 Co = 08.000 ATo = 318.35 — 08.017 (T — 154.5) 0=-+ 0.140 + 3.196 da+ 0.014 de + 2.747 dAT da = — 08.058 Weight of a= 1.95 0 = — 0.353 + 0014 da + 10.000 de + 6.325 dAT de = + 08,035 c= 9.97 = + 0.061 + 2.747 da — 0.353 de+6.053dAaT daT= + 02.013 AT=3.68 GREEN RIVER, WYOMING, JUNE 20, 1873. a : 5 Name of star. om Aa. Bb. Ce. i AR. AT. 5 hem. 8. 8. 8. 8 hem. 8. ham. | 8 8. W.| ¢ Urs Minoris.-..|15 48 12.36 |4+ 0.88 |— 0.18 |— 0.04 |15 48 13.02 |15 48 44, 14 + 31.12 Weil Si Scorpiie- 2-4 -a24| 57 84).08)|— 028) |— 01,03) |— 0) 11 57 33.76 58 05.15 31. 40 Wid) Ophinehi.--5-- 2: 16 07 12.28 |— 0.21 |— 0.02 |— 0.01 |16 07 12.04 |16 07 43.34 31.30 Waite (Opliuchilss-- 2 11 06.84 |— 0.22 |— 0.01 |— 0.01 11 06.60 11 38.00 31. 40 Weill) Elereulispes saeece 15 26.46 |+ 0.04 |— 0.01 |— 0.01 15 26. 48 15 57.69 31. 21 BK. | 7 Draconis'......-- 21 47.86 |+ 0.22 |+ 0.03 |+ 0.02 21 48.13 22 19.68 31.55 EK. | A Draconis ........ 27 46.26 |+ 0.39 |+ 0.06 |+ 0.03 27 46.74 28 18.14 31. 40 E. | 7 Herculis ..-....- 38 03.24 |— 0.02 |+ 0.05 |+ 0.01 38 03. 28 38 34.74 31. 46 E. | 49 Herculis ........ 45 48.78 |— 0.14 |+ 0.05 |+ 0.01 45 48.70 46 19.87 31.17 E.| « Ophiuchi........ 51 10.08 |— 0.16 |+ 0.04 |-+ 0.01 51 09.97 51 41.30 31. 33 E.|d Herculis~....... 16 56 25.80 |— 0.05 |+ 0.06 |+ 0.01 |16 56 25.82 |16 56 57.00 + 31,18 - NORMAL EQUATIONS. =—0.40 =05000 AT» = 31.35 — 08.017 (T— 154.5) 0 = — 0.245 + 2.973 da — 1.271 de + 2.826 dAT da = + 08.097 Weight of a=1.60 0 = + 0.030 — 1.271 da + 11.000 de + 0.558 dAT de = + 08,009 e=972 0 = — 0,204 + 2.826 da+ 0,558 de + 6.940 dAT adAT=— 05.011 AT=3.96 ASTRONOMY. Observations and reductions for tume taken at sending station—Continued. GREEN RIVER, WYOMING, JUNE 25, 1873. a I Name of star. T Aa. Bb. Ce. ae AR. AT. 3 hm. 8. 8. 8. 8. lio Gide Eb ete, 8s 8. Walllgeebootis)-seersese=— 14 20 13.32 |+ 0.06 |— 0.10 |— 0,28 |14 20 13.05 [14 20 54.36) + 41.31 w.|5 Uzsx Minoris....| 27 12.84 |4+ 0.49 |— 0.16 |— 0.58 27 12.59 97 53. 38 40.79 W.| xz Bootis, pr -.----- 34 05.76 |— 0.09 |— 0.03 |— 0.14 34 05.50 34 46.97 41, 47 W.|e Bootis ---... .--- 38 46.66 |— 0.06 |— 0.04 |— 0.16 38 46. 40 39 28.08 41.68 W. | a? Libre ---- ---.-- 43 11.50 |— 0.18 |— 0.03 |— 0.14 43 11,15 43 52.82 41, 67 E. | 8 Urs Minoris.--- 51 27.56 |+ 0.43 |— 0.38 |+ 0.52 51 28.13 51 09.88 41.75 E. | 8 Bootis ...- .----- 56 30.06 |— 0.00 |— 0.21 |+ 0,18 56 30. 03 57 11.60 41,57 1D, || (8 Wye) 545 o55e 15 09 30.98 |— 0.16 |— 0.17 |+ 0.14 |15 09 30.79 |15 10 12.10 41.31 E. | y Ursx Minoris....) 20 19,02 |+ 0.365 |— 0.86 |-+ 0.45 20 18,96 21 00. 88 41.92 E. | @ Corone ......... 28 39.20:|— 0.06 |— 0.32 |4 0.16 28 38. 98 29 20. 47 41, 49 E. | @ Serpentis ..----. 37 21.38 |— 0.12 |— 0.24 |4+ 0.14 |15 37 21.16 ]15 38 02.53 | + 41.37 NORMAL EQUATIONS, Ap = — 08.37 Cco=-+ 08.18 AT o = 415.43 — 05.025 (T — 164.8) 0 =— 0.507 + 2.837 da — 0.197 de + 2.425 d AT da= -+ 05.164 Weight of a= 1.93 0 = + 0.495 — 0.197 da + 11.000 de + 0.541 dAT de = — 08,042 c= 10.96 0=— 0.481 + 2.425 da-+ 0.541 de + 6.545 dAT dAT=-+ 05.014 AT= 4.46 GREEN RIVER, WYOMING, JUNE 25, 1873. A I Name of star. T. Aa. Bb. Ce. awe AR. AT. S) hom. — (8. 8. wo iS 8. hm 8. hom 8 8. dy |) tb VAciMtbob56 So5505 18 27 38.84 |— 0.44 |— 0.06 |+ 0.19 /18 27 38.53 |18 28 19.80} + 41.27 1D, || Ge IAP onsssesacae 31 58.86 |-+ 0.04 |— 0.10 |+ 0.24 31 58. 96 32 40. 47 41,51 E..| @ Lyre -.-..-.-.- 44 44,16 |— 0.10 |— 0.13 |+ 0.23 44 44,17 45 25. 48 41.31 KB. | o Sagittarii .....-.. 46 44.70 |-— 0.59 |— 0.05 |+ 0,21 46 44, 27 47 25.77 41.50 E..| 50 Draconis ..-..-.- 49 49.14 |+ 1.25 |— 0.39 |+ 0.74 49 50.74 50 32.01 41, 27 W.|¢ Be) |§G) BOOSH -- 1 -Nee 6 13 30.23 |+ 0.58 |4+ 0.03 |4 0,18 | 6 13 31.02 |14 20 54.29 |48 07 23. 27 E. | 5 Urse Minoris.... 20 25.10 |+ 4.29 J+ 0.10 |+ 0.45 20 29.94 Bre GR Sih 23. 37 I. | 2 Virginis .......- 29 01.20 |— 1.16 |4+ 0.00 |+ 0.11 29 00.15 26 23.53 23. 38 Ie || laMity oatesonsse 32 04.81 |— 0.46 |+ 0.07 |+ 0,12 32 04.54 39 28. 07 23.53 ee Ibe ae code 36 30.76 |— 1.51 |+ 0.05 |+ 0.11 36 29.41 43 52.81 23. 40 W.| @ Urse Minoris.-..| 43 42.84 |+ 3.69 |4 0.57 |— 0.41 43 46.69 51 09.90 23. 21 Wee Boote?-2--— ea 49 47.93 |+ 0.01 |+ 0.24 |-- 0,14 49 48.04 57 11.59 23855 W. | 48 Cephei (s. pol.) -.| 56 57.44 |— 7.00 |— 0.40 |+ 0.49 56 50.53 |15 04 13. 82 23. 29 Wai) 6) ainbresse- eee 7 02 50.04 |— 1.31 |+ 0.10 |+ 0.11 | 7°02 48.7 10 12.11 23.39 Nive || Ga brivis ashe 08 36.93 1.49 |+ 0.07 |+ 0.11 08 35. 40 15 58.54 23.14 W.| Bootis ...---.-- 12 20.19 |— 0.12 |+ 0.16 |+ 0.14 12 20.19 19 43.52 |+8 07 23.43 NORMAL EQUATIONS. 11.00 d¢++ 264a+ 515¢=-+ 0.05 a=— 18,75 2.64 dt + 29.18 a + 15.43 c= — 48.44 e=-+ 02.11 5.15 dt + 15.43 a + 64.10 e=— 18.08 ot =-+ 03.36 SALT LAKE CITY, UTAH, JUNE 26, 1873. S I Name of star. eles Aa. Bb. Ce. 1. AR. AT. ‘S) Bats 8. 8 & lOneits oN |Vestits hm 8. W.| 7 Draconis ........ 8 14 54.69 |+ 1.42 |+ 0.24 |— 0.33 | 8 14 56.02 |16 22 19.52 |4-8 07 23.50 W.| A Draconis.......-} 20 52.58 |-+- 2.47 [+ 0.30 |— 0.43 20 54.92 28 18.20 23. 28 W.| 7 Herculis ......-- 31 11.47 |— 0.07 |+ 0.15 |— 0.20 31 11.35 38 34.70 23. 35 Breen Ophiuchiesssece- 44 18.84 |— 0.99 |+ 0.08 |+ 0.16 44 18.09 51 41.33 23.24 Brevina) Hlerculis)-ss-ss5- 49 33.77 |— 0.28 |+ 0.08 + 0.18 49 33.75 56 56.99 23. 24 K.| « Urse Minoris.-..| 50 38,22 |+ 9.18 |4+ 0.39 |4+ 1.14 50 48.93 59 12.32 23.39 E. | a) Herculis ...--..-. 9 01 30.62 |— 0.86 |+ 0.06 |+ 0.16 | 9 01 29.98 |17 08 53.39 |+8 07 23.41 NORMAL EQUATIONS. 7.00 dt— 5.8la+ 4.44¢—=-+ 13.95 a=— 15.87 5.81 dt + 26.94 a — 29.93 ¢e =— 57.10 c=— 08.15 4.44 dt — 29.93 a + 72.42 c= + 68.66 ot = -+ 08.34 ASTRONOMICAL STATION—GREEN RIVER, WYO.—1873. 143 The following tables give the corrections and rates for the chronometers used at Green River and Salt Lake City: CHRONOMETER AT GREEN RIVER.—Necus, No. 1499. Local sidereal Date, ean 1873. h. June 10 14.8 + June 12 15.3 June 19 15.9 June 20 15.5 June 25 16.8 June 26 16. 2 + Correction of chro- nometer. 5 8. . 004 + 0. 022 . 272 + 0.017 -573 £ 0.028 . 301 + 0, 027 - 428 + 0. 027 43, 851 + 0, 028 Ht Adopted hourly rate. CHRONOMETER AT SALT LAKE CITY.—Nereus, No. 1511. Signals sent from— June 10, 1873: Salt Lake City- Green River ---. June 12, 1873: Salt Lake City- Green River --. June 19, 1873: Salt Lake City. ; Green River - a) po Date Local sidereal| Correction of chro- | Adopted hourly 5 time. nometer. rate. 1873. h. lips sh 8. June 10 14.0 + 8 07 44.83 — 0.058 June 12 14.75 42, 02 — 0.059 June 19 15.5 31,51 — 0.053 June 20 16.0 30. 25 — 0.051 June 25 16.5 24. 61 — 0.053 June 26 15.5 + 8 07 23.35 — 0.054 Final results of longitude. oe : aos g Mean ofsig-| ,,- os > Recorded at— [nals sentand ne epee: Sopsaee Bs og received. HOLS Hater aS 2s SER & i=) A hk. m. 8. hem. 8. Tete Sen Me Sa 8. Salt Lake City.|} 6 53 18.46 |+ 8 07 44.77 |15 01 03.23 Green River -..|]5 10 28.58 |+ 0 00 16.99 10 45.57 |9 42.34 Salt Lake City.| 7 00 19.82 |+ 8 07 44.77 |15 08 04.59 Green River ..-|15 17 29.80 |+ 0 00 16.99 17 46.79 |9 42.20 |+ 0,14 Green River ..-/15 32 57.15 |+ 0 00 19.25 |15 33 16.40 Salt Lake City-| 7 15 52.04 |+ 8 07 41:98 23 34.02 |9 42.38 Green River . ..|15 38 29.81 |+ 0 00 19.26 |15 38 49.05 Salt Lake City.| 7 21 24.73 4 8 07 41.98 29 06.71 |9 42.34 |+ 0.04 Green River -..|16 03 25.84 |+ 0 00 31.57 |16 03 57.41 Salt Lake City.| 7 46 43.54 |+ 8 07 31.49 |15 54 15.03 |9 42.38 Green River --.|16 12 59.90 |+ 0 00 31.56 |16 13 31.46 Salt Lake City-| 7 56 17.54 |+ 8 07 31.48 |16 03 49.02 (9 42.44 |— 0.06 ¢ Means. Mm. = 9 42.270 9 42. 360 9 42.410 144 ASTRONOMY. Final results of longitude—Continued. e = ee Mean ofsig- | ;- om e Signals sent from—| Recorded at— nals sent and basa oi eae oe 25 Means. received. eS a z + A a June 20, 1873: hm. 8. hm 8 |ho m8. |m 8 8 |m. 8 1 ke Ci Green River --.|15 29 34.24 |4+ 0 00 31.35 |15 30 05.59 Salt Lake ity. } Salt Lake City.| 7 12 52.76 |4 8 07 30.29| 20 23.05 |9 42.54 Ri Green River ...|15 35 59.94 |+ 0 00 31.35 36 31.29 SEEDED ---§ Salt Lake City.| 7 19 18.58 |4 8 07 30.28 | 26 48.86 /9 42.43 |4 0.11 |9 42. 485 ' ! June 25, 1873: | Salt Lake Cit Green River --..|18 02 59.77 |4+ 0 00 41.40 |18 03 41.17 SEE ERE ity. } Salt Lake City.| 9 46 34.08 |4 8 07 24.54 |17 53 58.62 |9 42.55 G Ri Green River .-.|18 08 40.00 |+ 0 00 41.39 |18 09 21.39 Teen wer = Salt Lake City.| 9 52 14.38 |+ 8 07 24.53 |17 59 38.91 |9 42.48 |4 0.07 9 42.515 June 26, 1873: Sal ke Cit Green River..-./15 48 21.47 |+ 0 00 43.87 |15 49 05.34 alt Lake City.» | sait Lake City.| 7 31 59.51 |+ € 07 23.34] 39 22.85 |9 42.49 G Ri Green River - -.|15 53 49.87 |+ 0 00 43.86 54 33,73 reer 4 Salt Lake City.| 7 37 27.90 |4+ 8 07 23.34 |15 44 51.24 |9 42.49 | 0.00 |9 42. 490 Green River east of Salt Lake City.----.---------..----- Ob 09m 428.472 + as ie sums oF errors), . =e 05.Uz y sums of squares not yet including the personal equation. j Salt Lake City west of Greenwich..--...-----.---------- 7) 27m 345.86 Green River west of Greenwich -.----.----------.------- 7h 17™ 528.438 Green River west of Greenwich -..---..------.-----.---- 109° 28’ 06'.57 Mean places of stars for 1873.0 used for determination of latitude of Green River, Wyoming. No. of pair. a 4G. Bie er Declination. || No. of pair. | nN Aaa Hieut acous Declination. h. m. 8. RE cid h. m. 8. OTT is me 1 741 14 11 33 | 46 40 19.74 13 ( 5643 16 42 54 57 00 33. 82 RRs ie, ; ATAT 12 37 | 36 05 46.76 des sae LK? 5703 49 50 25 56 12.22 9 4804 14 2413] 50 24 50.62 14 5747 16 56 55 33 45 12.56 5 ag Oe ; 4820 28 47 | 33 05 32.84 ivi. ; *5776 17 01 28 48 58 47.42 3 4863 14 37 31 | 37 17 55.00 15 5842 7 12 38 33 14 17.72 peida eet ice ; 4881 SOFAS a5 43826 AG ee ee cae ; ; 5253 13 35 49 49 40.56 4 4917 14 47 35 | 47 00 01.34 16 5871; 17 16 46 46 21 58.58 ra ; 4961 58 02} 35 42 15.40 eee ; 5895 20 03 37 03 57.44 5 5033 15 09 35 | 42 38 43.44 7 4 5937 17 27 33 52 23 46.14 ee ; 5076 17 55 | 40 02 09.94 MES | an Bl 5962 3L 47 30 51 54.52 6 5131 15 27 48 | 31 47 19.92 18 6082 17 51 54 37 16 06.96 ee Sr ; 5181 34 52] 50 50 18.82 ee eine ; 6109 56 19 45 30 30.74 = 5 5248 15 44 34] 55 45 58.04 19 6203 18 11 42 42 07 01.44 (etSorsr tes 2 5302 B2E20 27 ACT 34 aera ; 6218 13 05 40 53 15. 48 8 5321 15 56 21 | 30 12 27.82 20 6311 18 24 56 59 37 34. 44 oe ae 5341 58 51] 53 16 09.72 ta es 6322 7 29 23 31 25.08 9 5434 16 10 52 |- 23 26 24.66 21 6470 18 50 04 50 33 04.20 Sa ee } 5459 15 08 | 60 03 48.02 co eo ae 6491 54 12 32 31 00.00 10 ; 5473 16 17 09 | 31 11 17.94 29 ; 6520 18 57 51 | 46 45 20.56 oS Gear eae 5503 21 47 | 52 00 17.76 | Pica he 6556 19 02 46 35 54 08.16 ll i 5541 16 28 32 | 30 45 59.86 23 6650 19 17 59 73 07 08.16 To aoe be 5549 30 53} 52 30 05.20 ey 772 19 40 13 10 18 19.31 12 ; 5096 16 3518} 49 10 39.46 pa eet 5619 39 11} 34 16 26.24 | Or * The declination of the star 5776 as given in the Catalogue of 981 Stars is 48° 58’ 50.12; a proper motion of — 0.10 annually has been assnmed here. LATITUDE DETERMINATIONS. 145 Observations and computations for latitude. GREEN RIVER STATION, WYOMING. Level. Corrections. No. of} Microm. ’ Half-sum of : Date. star. | readings. Remarks. declination. Migeron ‘ BEAU N. Ss Pan Level. | Merid. } 1873. is d. ad. fo} ‘ a“ / a“ “a “ (yay “ June9..| 5131 30.730 | 24.0 | 13.9 | Dlumination 5181 LORS 1S | Reece 44.1 poor. 41 18 48.28 |+13 21.48 |—9. 26 |..--..- 41 31 40.50 5248 20. 412 | 15.6 | 22.6 | Oliserved off 5302 22.195 | 37.0} 1.3] line of col- 30 21.74 |+ 1 08.74 |+6. 64 |+0. 12 37. 32 limation. 5321 10.017 | 23.5 | 14.2 5341 PREC ABBE VEY 44 16.34 |\—12 46.72 |4+8.75 |....... 35. 37 5473 15. 434 | 21.2 | 16.0 5503 21.850 | 19.6 | 19.0 35 44.26 |— 0 47.33 |41.34 |...... J 38, 27 5541 15, 822 | 28.6 on 5549 25.692 | 5.5 | 33.0 | 37 58.41 |-- 6 20.47 |—1.94 |......- 36. 00 5747 27.103 | 30.0 | 9.0 H 5776 12.010 | 12.3 | 26.9 21 54.37 |-+ 9 41.81 |+1.48 |...-..- 37. 66 5937 23.820 | 12.3 | 27.1 5962 14, 287 | 30.5 | 9.0 37. 43,29 |— 6 07.48 |+1.55 |.----.. 37.36 6082 25, 357 | 18.0 | 22.3 | Growing 6109 12.198 | 31.4] 9.2 cloudy. 23 10.63 |-+ 8 27.26 |+4.14 |....... 42.03 6203 | 18.641 | 17.0 | 23.9 6218 21.074 | 32.9} 8.2 29 59.46 |+ 1 33.79 |+4.12 |.------. 37. 37 6311 21. 863 | 17.4 | 24.2 6322 17.618 | 26.8 | 15.0 34 20.45 |— 2 43.64 |4+1.16 |...-... 47. 97 6520 10. 152 | 20.2 | 21.9 6566 28, 863 | 28.0 | 14.0 19 33.58 |+12 01.27 |+2.85 |...--.- 37.70 6650 27.124 | 17.0 | 25.0 6772 10.030 | 31.0 | 11.0 42 33.57 |—10 58.99 |+2.78 |...--. 37. 36 June 10.) 5747 26.799 | 24.0 | 14.5 5776 11. 660 | 15.2 | 24.0 21 54.65 |+ 9 43.58 |4+0.16 |..-...- 38. 39 5842 18.986 | 28.0 | 11.0 5853 19.465 | 16.0 | 23.0 31 53.12 |— 0 18.46 |+2.32 |....... 36. 98 5871 23.748 | 24.1 | 14.8 : 5895 6.120 | 23.4 | 15.7 42 51.74 |—11 19.53 |+3.94 |...--.. 36. 15 5937 23. 303 | 20.1 | 18.9 5962 13.726 | 23.7 | 15.5 37 43358 |— 6 09.18 |+2.18 |..---.- 36. 58 6082 24.691 | 5.6 | 33.3 6109 11.5r3 | 39.0} 0.0 23 10.93 |-+- 8 25.29 |+2. 62 |...-..- 38. 84 6311 22.743] 20.1 | 19.2 6322 18.393 | 28.0 | 11.4 34 20.74 |— 2 47.68 |+4.05 |..----- 37.11 6470 20.410 | 24.2 | 16.3 i 6491 |; 19.972 | 26.3 | 14.5 41 31 51.96 |— 0 16.88 |+4.56 |.----.- 31 39. 64 10 AST 146 ASTRONOMY. Observations and computations—Coutinued. GREEN RIVER STATION, WYOMING. Level. Corrections. No. of} Microm. }-——j———_ Half-sum of , Date. | star, | readings. Remarks. | geclination. Mioroui Latitude. N. iS) aaa rani Level. | Merid. 1873. t d. d. of “ 7] u“ June 10- 9.917 | 27.0 | 13.5 98.551 | 27.8 | 13.1 41 19 33.88 |4+11 58.31 28.097 | 19.3 | 21.5 11.082 | 19.1 | 22.5 42 33.84 |—10 55.94 June 11. 34.610 | 32.8] 1.9 135237/))|) 15259) 2950 45 14,60 |—13 43.83 20. 413 | 13.0 | 22.0 19.047 | 29.8] 5.3 30 42.84 |+ 0 53.C0 11. 316 | 20.8 | 15.0 27, 682 | 11.2 | 24.5 21 09.88 |+-10 30.88 12. 631 | 23.7 | 13. 29,988 | 17.2} 19. 20 27.12 |+11 09.07 29,658 | 19.0 | 18 9.700 | 19.7 | 17 18 48.76 |+12 49.34 20.132 | 19.6 | 18 22.063 | 21.1 | 17 30 22.23 |+ 1 14, 44 10.119 | 23.0 | 15. £9, 878 | 23.0 | 15. 44 16.84 |—12 41. 67 9, 264 | 22.2 | 17. 30. 221 | 20.0 | 19. 45 03.47 |—13 27.85 14, 861 | 20.0 | 19.7 | Observed off 21, 321 | 20.9 | 16. line of col- 35 44.80 |— 4 09.02 limation. 16. 352 | 27.0 | 13. 26.355 | 23.0 | 17. 37 58.94 |— 6 25.60 98, 224 | 35.8] 4. 9. 620 | 20.6 | 19. 43 28.96 |—11 57.15 _ 2 for) D © ist} i=) om © oo oo on Nw @oO oo a) o~ a) Nelor} (TS) oo ao 22.809 | 15.4 | 2 28 18.66 |+ 3 17.37 28. 249 | 19.0 | 22 13.188 | 31.3] 9 21 54.95 |+ 9 40.77 19, 522 | 20.2 | 21. 19, 887 | 20.2 | 21. 31 53.40 |— 0 14. 07 23.102 | 23.4 | 18. 13. 582 | 20.7 | 21. 37 43.88 |— 6 C6.98 24.305 | 23.1 | 19. 11.141 | 20.4 | 23. 23 11.24 |-+ 8 27.45 20.923 | 25.4 | 17. 23. 427 | 24.1! 19, 41 30 00.08 I4- 1 36.52 LATITUDE DETERMINATIONS. 147 Observations and computations—Continued. GREEN RIVER STATION, WYOMING. Date. 1873. June ll. June 12. June 16. Level. Corrections. No. of | Microm. Half-sum of F star. | readings. Remarks. | geclination. Micron. ; Latitude. Ss. and sere. Level. | Merid. us d. d. fe} ‘ “ (i “ut “a “ (eo) i “ 6311 22. 392 | 27.3 | 16.0 6322 18. 123 | 18.0 | 25.4 41 34 21,04 |— 2 44.56 |40.90 |....... 41 31 37. 38 6470 20.563 | 32.0 | 12.0 6491 20.130 | 20.8 | 23.4 31 52.27 |-— 0 16.69 |+-4.35 |....... 39. 93 6520 9, 620 | 34.3 | 10.0 6556 18. 320 | 19.0 | 25.1 19 34.19 |4+12 00.85 |+-4. 21 |....... 39, 25 6650 27.065 | 36.4) 8.0 6772 9,931 | 17.2 | 28.0 42 34.10 |—11 00.53 |+-4.07 |......- 37. 64 5842 19. 163 | 15.8 | 20.0 5853 a eis ees 45.0 31 53.70 |— 0 02.39 |—13.36]......- 36 95 5937 22.110 | 21.5 | 15.3 5962 12. 543 | 20.4 | 16.6 37 44.18 |— 6 08.79 |4+-2.32 ]......- 37.71 6082 25, 237 | 17.8 | 20.2 6109 12.113 | 26.0 | 12.5 23 11.54 |4+ 8 25.91 |4-2.57 |..-.-.- 40. 02 6203 19, 336 | 19.0 | 19.0 6218 21.820 | 23.9 | 14.4 30 00.38 |+ 1 35.75 |+2.20 |...--.- 38. 33 6311 22. 863 | 28.2 | 10.0 6322 18. 522 | 15.8 | 22.3 34 21.34 |— 2 47.34 |4-2.71 |..--..- 36.71 6470 | 20.892 | 37.0] 2.0 ©) 6491 |} 20.412 | 14.8 | 24.0 (*) 31 52.57 |— 0 18.50 |4+0.63 |-+0. 35 35. 05 6520 8.890 | 23.0 | 16.0 6556 27.576 | 24.3 | 14.5 19 34.50 |+12 00.31 |+3.89 |....-.- 38. 70 6650 26.961 | 37.0 2.0 6772 9.918 | 3.7 | 30.0 42 34.36 |--10 57. 02 |+0.63 |.---... 37.97 5131 31.121 | 21.2 | 24.6 5181 11.179 | 30.5 | 16.0 18 49.90 |+-12 48.72 |42.57 |.------ 41.19 5248 20. 642 | 26.8 | 20.0 5302 22.500) |) 21-9" | 25.3 30 23.40 |4+ 1 12.90 |+40.79 |......- 37.09 5321 10. 052 | 23.0 | 24.1 5341 29. 801 | 27.2 | 20.1 44 18.06 |—12 41.29 |4-1.38 |..--... 38. 15 5473 15. 698 | 22.5 | 24.4 5503 22,205 | 34.2 | 14.5 30 46.09 |— 4 10.83 |44.12 }..-.-.. 39. 38 5596 27.320 | 33.6 | 15.1 @) 5619 8.721 | 19.0 | 29.5 (*) 43 30.31 |—11 56.96 |4-1.85 |-+0. 24 35, 44 5643 17, 850 | 26.0 | 22.8 5703 22.931 | 26.2 | 23.0 28 19.99 |+ 3 15.87 |4+-1.48 | .------ 37. 34 5747. 27.570 | 22.0 | 27.2 5776 12.510 |! 36.8! 13.0 41 21 56.35 '4+ 9 40.54 !44.31 !......- 41 31 41.20 * Off line of collimation. 148 ASTRONOMY. Observations and computations—Continued. GREEN RIVER STATION, WYOMING. | Level Corrections. No. of} Microm. Half-sum of | 2 Date. | star. readings. EITDGES decimation.) jficrom [SE IEe N. S Fala ate Level. | Merid. 1873. re d. d. Oo i a“ y} “a ‘ “a June 16.| 5842 18.708 | 22.9 | 37.0 5853 19.248 | 34.0] 16.0 | Through |41 31 54.84 |— 0 20.81 41 31 34,93 clouds; faint. 5937 22.158 | 39.0 | 11.0 5962 12.517 | 17.2 | 33.0 37 45.32 |— 6 11.64 36.50 June17.} 4804 33. 764 | 24.1 | 16.0 4820 12.550 | 16.3 | 23.9 45 15.66 |—13 37.76 38. 02 4917 11.593 | 20.2 | 20.0 4961 27.902 | 16.7 | 24.1 21 11.08 |4+L0 28.68 38. 09 5033 13. 567 | 24.0 | 17.7 5076 30.978 | 15.9 | 26.2 20 28.44 |4-11 11.15 38. 66 5131 29.772 | 19.0 | 23.5 5181 9.830 | 24.1 | 18.3 18 50.12 |4+12 48.72 39.14 5248 20.557 | 24.1 | 19.0 5302 22.515 | 16.0 | 27.3 30 23.63 |+ 1 15. 48 37. 67 5321 9.981 | 19.0 | 24.0 5341 29.722 | 24.1 | 19.0 44 18.30 |—12 40.98 37.34 5434 9.108 | 21.9 | 21.4 5459 30. 087 | 23.0 | 20.6 (*) 45 04.94 |—13 28.71 37.12 5473 14. 120 | 16.5 | 27.3 = : 5503 20. 668 | 30.5 | 13.5 | Very faint. 35 46.35 |— 4 10.49 37. 44 5541 | 15. 673 | 22.8 | 21.3 | 5549 25. 628 | 25.3 | 18.9 38 00.52 |— 6 23.75 38.59 5596 28.153 | 22.3 | 21.9 5619 9.599 | 26.4 | 18.0 43 30.58 |—11 55. 22 37.39 5643 18.185 | 29.8 | 14.9 5703 23.304 | 17.5 | 27.4 28 20.25 |+ 3 17.33 38.74 5747 28. 320 | 20.9 | 24.0 5776 13. 231 | 27.2 | 18.2 21 56.62 |+ 9 41.65 39. 64 5842 19.510 | 17.8 | 28.0 5853 20.005 | 32.0 | 14.0 31 55.12 |— 0 19.08 37.85 5871 21. 800 | 25.1 | 20.8 5895 4,182 | 21.9 | 24.2 42 53.78 |—11 19.14 35. 70 5937 22.510 | 24.3 | 22.0 5962 12. 921 | 27.6 | 19.6 | 37 45.61 |— 6 09.64 38. 35 6082 24. 645 | 26.0 | 21.5 6109 11.587 | 27.0 | 20.3 23 13.04 |4+ 8 23.36 38. 99 \ | 6203 | 19.680 | 30.2 | 18.0 6218 | 22.109 | 22.9 | 24.3 41 30 01.91 [4+ 1 33.63 | (41 3138.04 * Off line of collimation. Date. 1873. No. of| Microm. star. June17.| 6311 June 20. June21- 6322 6470 6491 6520 6556 6650 6772 5842 5853 5871 5895 5937 5962 6082 6109 6203 6218 6311 6322 6470 6491 6520 6556 6650 6772 5248 5302 5321 5341 5434 5459 5473. 5503 5541 5549 5596 5619 readings. t. 22.317 17. 950 19, 932 19, 423 9, 170 27. 870 27. 803 10. 637 20. 193 20.711 23. 611 5. 932 23. 398 13. 753 20. 463 12, 382 18, 347 20.785 22. 192 17. 839 20. 023 19, 523 10. 263 28. 923 27. 227 10. 063 20, 206 22. 083 10. 200 29. 937 9.191 30, 190 15. 655 22. 212 16. 270 26. 300 27. 300 8. 688 LATITUDE DETERMINATIONS. Observations and computations—Continued. GREEN RIVER STATION, WYOMING. Level. d. d. 39.0} 9.3 15.9 | 32.7 41.0 19.2 | 3 as ve OK ww WO SOF CH HO om oF OV WH SSO WO TO RH ON WO we we ww wre ee. Se Sek Rw We HW FES GG SI NB SAGA SIEM eee ww Bet RS poco! Ser ites Ve We ASA Rh So #} oO as me Ol om me OO a com won oo om ou oo oe ow om oom mw 165 ws envy ww Nie > ww ww ww vue 29 09 ii Reh BOR BG ey ete we we mI HOM WY WW BES ee eae ww wre ww SS Remarks. Very faint. Half-sum of declination. (et “ 41 34 22.80 31 54.10 19 36.04 42 35.70 31 55, 96 42 54. 64 37 46. 46 23 13.94 30 02. 82 34 23. 68 31 55. 02 19 36.96 42 36,52 30 24.51 44 19, 22 45 05, 87 35 47.34 38 01.52 41 43 31.61 149 Corrections. ¢ Latitude. Moroes Level. | Merid. — 2 48.34 |42.99 |.___... 41 3137. 45 — 0 19.62 |4-4,77 |_.-...- 39.25 +12 00.85 }+-1.69 |..-...- 38. 58 —11 01.76 |-+1.55 |. ... 35. 49 10) 19: 96) 1 37 |e. 37. 37 —11 21.49 |43, 47 |...--.- 36. 62 — 6 11.80 |+4.91 |..-.--.. 39, 57 -++ 8 24.25 |41.97 |......- 40. 16 + 1 33.98 [43.17 |...--.- 39. 97 — 2 47.80 |+2. 82 |...-..- 38. 70 — 0 19.27 |+4.56 |..-...- 40. 31 +11 59.31 |4+-2.80 |......- 39. 07 —11 01.63 |43.54 |..-...- 38. 38 + 1 12.34 |40.74 |.....-- 37.59 —12 40.82 |—0.51 |.---... 37. 89 —13 25.63 |+1.27 |...--.- 41.51 — 4 12.76 |4+-3.77 |..--..- 38, 35 — 6 26.64 |4+2.93 |...---- 37. 81 —11 57.46 |41. 92 |...-..- 41 31 36. 07 150 ASTRONOMY. Observations and computations—Continued. GREEN RIVER STATION, WYOMING. Level. Corrections. No. of] Microm. Half-sum of : Date. | star, | readin gs. Remarks. | acclination. MMioeom Latitude. N. 5. Hl wait, Level. | Merid. ae |e 1873. t. d. | da. Cees i) a ae ae i Ka June21 | 5643 17, 947 | 25.5 | 19.0 5703 22,974 | 22.0 | 23.0 41 28 21.28 |+ 3 13.79 |4+1.27 | ......- 41 3136, 34 5747 28. 564 | 21.0 | 24.0 5776 13. 572 | 32.0 | 13.0 21 57.71 |+ 9 37.92 |+3.70 | ----. E 39. 33 5842 19, 972 | 20,0 | 24.7 5853 20.552 | 34.7 | 10.9 31 56.24 |— 0 22.31 |+4. 63 |..---.- 38. 56 5871 22, 381 | 23.0 | 21.3 5895 4.649 | 29.1 | 14.8 42 54.92 |—11 23.53 |-++3.70 |..--.. 35. 09 5937 24,107 | 31.6 | 12.2 5962 14, 403 | 25.5 | 18.0 37 46.75 |— 6 14.07 |+6. 23 |..---- 38. 91 6470 20. 231 | 39.0 | 14.9 6491 19. 632 | 23.9 | 29.7 81 55.32 |— 0 23.09 |4-4. 24 |..-.-- 36. 47 June 22.) 5033 8.273 | 30.7 | 25.0 5076 25.619 | 25.0 | 31.0 20 29.44 |+11 08.65 —0. 07 |...--- 38. 02 5131 30. 008 | 31.0 | 25.0 5181 10.121 | 28.7 | 27.6 18 51.18 |+12 46.60 |+1.64 |...--. 39. 42 June 24.) 5434 7.684 | 26.0 | 21.7 5459 28.739 | 27.1 | 21.0 45 06.56 |—13 31.64 |+2.36 |....-.-. 37. 28 5473 16. 613 | 20.9 | 27.2 . 5503 23. 223 | 37.0 | 11.3 35 48.06 |— 4 14.80 |+-4.49 |...--- 37.75 5541 16.016 | 25.9 | 21.7 5549 26.073 | 31.0 | 12.0 38 02.26 |—- 6 27.68 |+5. 32 |..-.-.- 39. 90 5596 28, 023 | 27.3 | 20.6 5619 9.383 | 26.9 | 21.1 43 32.37 |—11 58.54 |+2.89 |...--- 36. 72 5643 17. 042 | 33.5 -| 14.6 703 22. 027 | 24.2 | 24.0 28 22.02 |-+- 3 12.17 |+4. 42 |..---- 38. 61 5747 | 28,294 | 23.6 | 24.6 | 5776 13. 355 | 34.5 | 14.9 21 58.51 |+ 9 35.87 |44, 31 |.------ 38. 69 5871 24, 283 | 17.3 | 31.3 5895 6.506 | 41.1 | 7.7 42 55.77 |—11 25.27 |-+-4. 49 |.----- 34, 99 5937 23. 460 | 36.2 | 12.1 5962 13. 763 | 23.2 | 25.0 37 47.60 |— 6 13.80 |-++5. 16 |..-.---.- 38. 96 6082 25.771 | 20.0 | 28.5 { 6109 11.739 | 39.0 |. 9.9 23 15.12 |+ 8 22.36 |4+4.77 |...--.- 42,25 6203 19, 403 | 31.1 | 17.8 6213 21.721 | 31.9 | 17.9 30 04.04 |-+ 1 29.35 |+6.10 |.-----. 39. 49 6311 21.103 | 40.3 8.9 6322 16. 616 ' 19.0 | 29.9 41 34 24.84 |— 2 62.96 144.75 !...--. 4131 36. 63 LATITUDE DETERMINATIONS. Observations and computations—Continued. GREEN RIVER STATION, WYOMING. Date. 1873. June 24. June 25. Level. No.of} Microm. readings. star. 6470 6491 6520 6556 6650 6772 4863 4881 4917 4961 5033 5076 5131 5181 5248 5302 5321 5341 5434 5459 5473, 5503 5596 5619 5643 5703 TAT 5776 5842 5853 5871 5895 5937 5962 6082 6109 6203 6218 t. 19, 867 | 3 19. 285 | 2 10.572 | 3 29. 148 28. 091 10, 847 19. 837 18, 684 12. 035 28. 178 13. 150 30, 405 30, 311 10. 559 21. 960 23.711 10. 271 30. 190 8.559 29. 691 16. 000 22. 685 28. 659 10. 348 18, 495 23, 486 [a SME aS) ont ©SO OM OD oo wx eo oS 29. 106 14, 182 Sob 18.533 19, 136 22. 585 5. 117 22. 971 13. 238 25, 423 12.464 18.719 21.005 Oe WW WD HH Www pete) AGEL enek | Sey) eRe) Sob Rw wr ne 2. PS Ses To ww oO s o we ww Gk SMR SY) SCN AW NS WH DY NSO OM AM SCS OR COW WSO SCY SSO BO We ~ 0 m0 SN RUG teat oo ee NS Noe VY ey HY YE Ve GIGS feat yey GaN tS Ge) te ww HOD Soa Remarks. Half-sum of declination. Corrections. Microm. and refr. Level. Merid. ov “ 41 31 56.25 19 38.20 42 37. 62 30 45.76 21 13. 00 20 30. 56 18 52. 36 30 25. 97 44 20.76 45 07. 44 35 48.99 43 33. 36 28 23.00 21 59.55 31 58.14 42 56.89 ‘ “ — 0 22.43 +11 56.07 —11 04.77 + 0 44,45 +16 22.28 +11 05.14 +12 41.40 + 1 07.50 —12 47.84 —13 34.61 — 4 17.69 —11 45. 86 + 3 12.40 + 9 35.29 — 0 23.23 —11 13,36 37 48.70 |— 6 15.19 23 16. 30 41 30 05. 24 + 8 19,55 + 128.12 151 Latitude. 41 31 39.70 40. 40 37.71 38. 22 40. 33 38 22 41. 89 38. 03 38. 92 39. 08 38. 66 37. 52 36, 21 39, 08 39. 19 47.03 38. 12 38. 86 41 31 34. 05 £52 ASTRONOMY. Observations and computations—Continued. GREEN RIVER STATION, WYOMING. Level. Corrections. ; No.of} Microm. St Half-sum of . Date. Star. | readings. Remarks. declination. Microin Latitude. N. S. manal t efr Level. | Merid. 1873. (fs d d. Or aie Y Le OP Lama June25.| 6311 21.755 | 31.0 | 21.4 6322 17. 301 | 21.3 | 31.3 41 34 26.00 |— 2 51.69 41 31 34, 22 June 27-| 4741 13.136 | 26.9 | 19.0 4747 26. 260 | 26.2 | 20.0 23 09.23 |+ 8 25.90 38. 39 4804 33.309 | 23:4 | 25.0 4820 P2R0G3N | 2ie0| 23: 45 17.18 |—13 40. 92 37.28 4863 20. 703 | 23.9 | 25.4 48381 19. 352 | 27.3 | 22.1 30 45.62 |+ 0 52.08 38. 56 4917 11. 382 | 27.0 Bis) 4961 27.653 | 19.8 | 31.6 21 12.84 |+10 27.22 38.18 5033 12. 263 | 24.2 | 28.3 5076 29. 602 | 29.5 | 23.4 20 30.38 |+-11 08.38 39, 22 5131 30. 058 | 22.0 | 31.4 5181 10. 158 | 30.4 | 24.0 18 52.17 |4+12 47.11 38. 59 5321 9.788 | 28.0 | 27.3 @) 5341 29. 641 | 36.2 | 19.1 44 20.55 |—12 45. 30 39. 32 5434 9.940 | 25.8 | 30.0 5459 31.007 | 37.0 | 19.0 45 07.22 |—13 32.10 38. 32 5473 15. 461 | 26.3 | 29.8 5503 22.063 | 38.7 | 17.8 35 48.76 |— 4 14.50 38.19 5541 16. 523 | 28.0 | 29.0 5549 26. 609 | 35.9 | 21.1 38 02.98 |— 6 28.79 37.39 5596 29.107 | 24.0 | 33.0 ae. 5619 10, 424 | 40.2 | 17.0 43 33.12 |—12 00.19 |-+3. 28 |.----.- 36, 21 5643 17.006 | 39.0 | 18.3 5703 22.006 | 21.0 | 36.8 28 22.76 |4+- 3 12.75 |41.13 |-.---- 36. 64 5747 28. 234 | 29.0 | 29.0 5776 13.219 | 30.4 | 28.2 21 59.29 |4+- 9 38.79 |+0.51 |.---- a 38. 59 5842 19. 412 | 25.0 | 34.0 5853 19.910 } 33.5 | 25.5 31 57.88 |— 0 19.19 |—0. 23 |...--..- 38. 46 5871 22.994 | 32.3 | 27.1 5895 5. 349 | 26.0 | 33.4 42 56.61 |—11 20.18 |—0.51 |.------ 35. 92 5937 23.739 | 25.2 | 34.8 5962 14.154 | 34.7 | 25.4 37 48.42 |— 6 09.49 |—0. 02 |..---.- 38. 91 6082 24.688 | 26.3 | 34.1 6109 11.600 | 31.0 |! 29.7 41 23 16.00 I+ 8 24.52 --1.50 |..--.-.- 413139. 02 * The star observed seems to have been R. C. LATITUDE DETERMINATIONS. Observations and computations—Continued. GREEN RIVER STATION, WYOMING. 153 Level. Date, |Ne- of] Microm. mes | star. | readings. N. Ss. 1573. t. d. d. June 27.| 6203 19.611 | 31.6 | 29.5 218 22. 012 | 28.2 | 33.2 6311 22. 496 | 26.0 | 35.6 6322 18, 122 | 37.9 | 24.1 6470 20. 042 | 35.7 | 27.0 6491 19. 503 | 31.9 | 30.4 6520 10.511 | 44.0 | 18.5 6556 29.080 | 25.7 | 36.8 6650 27.544 | 32.1 | 31.0 6772 10. 380 | 31.9 | 31.7 June 29.] 4741 13. 610 | 21.3 | 29.0 4747 26.791 | 30.3 | 20.0 4804 32, 807 | 30.9 | 21.8 4820 11.505 |, 22.0 | 30.9 4263 21.257 | 20.0 | 33.2 48-1 19. 870 | 30.2 | 23.2 4917 10. 888 | 26.0 | 28.6 4961 27.160 | 22.6 | 32.8 5033 11.957 | 25.8 | 29.8 5076 29. 327 | 30.2 | 25.3 5131 30. 165 | 22.6 | 33.5 5181 10. 249 | 31.9 | 24.9 5245 20. 107 | 28.7 | 28.3 5302 22.012 | 22.9 | 24.1 5321 9.743 | 27.0 | 30.0 5341 29. 490 | 25.4 | 31.6 5434 7.771 | 26.1 | 30.9 5459 28.750 | 26.2 | 31.0 5541 15. 810 | 27.1 | 30.1 5549 25.750 | 26.6 | 31.0 5596 27.975 | 30.0 | 28.0 5619 9.409 | 24.4 | 34.2 5643 16. 476 | 26.7 | 32.3 5703 21. 562 | 29:9 | 29.9 5747 27. 246 | 23.1 | 36.6 5776 12. 187 | 32.9 | 27.2 5842 19. 062 | 26.8 | 33.5 5853 19, 602 | 34.0 | 26.4 Remarks. Probably 10 d. error. (9) Half-sum of declination, 34 25.71 31 57.18 19 39.14 42 38, 45 23 09, 49 45 17.44 30 45, 90 21 13,16 20 30,74 18 52.54 30 26,16 44 20,97 45 07. 66 38 03, 46 40 33. 60 28 23.24 21 59.81 41 31 58, 42 Corrections. ie Lat‘tude. sey gen Level. | Merid. bot ” m |e oH + 1 382.55 |—0.72 |+-0.11 |41 3136. 88 — 2 48.61 |-+0.97 |...__.. 38. 07 — 0 20.77 |4+2.36 |..._... 38. 77 SLi) GEHESD) |bUS oh) || 38. 27 —11 01.68 |+0.30 |....... 37. 07 + 8 28.10 |+0.66 | ...... 38, 25 —13 41.15 |4+0.05 |....... 36. 34 + 0 53.46 |—1. 44 |._.._.- 37. 92 +10 27.26 |—2.96 |...._.- 37. 46 +11 09.57 |+-0.21 |......- 40. 52 +12 47.72 |—0.90 | .....-. 39. 36 +1 13. 44 |—0,19 }...2... 39. 41 —12 41.21 |—0.53 |....... 39, 23 13 28.71 |-2,22 }....... 36.73 — 6 23.17 |—1.71 |......- 38. 58 11 55.69 |—1..81 |.-.-..- 36. 10 em 206) |——1 30) hana e 38. 00 + 9 40.49 |—1. 81 ]......-. 38. 49 — 0 20,81 |4+0.21 }....-.. 41 31 37. 82 * Observed off line of collimation. 154 ASTRONOMY. Observations and computations—Continued. GREEN RIVER STATION, WYOMING. Corrections. No. of| Microm. _ Half-sum of : DEE: star. | readings. EEDEES: declination. mMiverann Latitude. padimatn Level. | Merid. 1872. t. Ome a ° “ June 29.| 5871 23. 297 5895 5. 613 & 41 42 57.17 |—11 21.68 |—1. 62 |+0.33 |41 3134. 20 5937 23. 595 5962 13. 946 37 48.98 |— 6 11.95 |—0.79 |.----.- 36. 24 6082 25. 540 6109 12. 477 23 16.58 |+ 8 23.56 |—1.32 |.----.- 38. 82 6203 | 19.998 6218 21. 392 30 05.54 |4+ 1 32.28 |—1. 04 |......- 36. 78 6311 21. 253 6322 16. 880 34 26.29 |— 2 48.57 |—0.56 |.----.- 37.16 * Observed off line of collimation. Discussion of latitude of Green River. : fate Drs g|42/ eg (882 | os i & Ls} Sm +z ay i as ooo, os Sites ef (Fang; £5 S| ss aS |SeeS| S | Mean latitude............ 41° 31! 38.12 ——— Sumyof errotsa=----ss--. eee a= 12’.03 Oe tate ut id Probable error of one pair .- ---- 0.452 1} 2| 4131 38.32] —0.60] 37.72 Z 2 4 37.20 | --0.98 | 38.18 Sum of squares ...--.---..----. 18.48 3 4 38. pS =. 06 | 38.47 | Probable error of one pair.-..--- - +0".464 5 2 e 78 =i 6 as fe Probable error of final result from g G a & on Hs as ef BUM Of OLrOrsy=s ses ee ee eee 0.084 3 8 38. a +0. 91 | 39.39 | Probable error of final result from 9 fal 38.18 | +0.97 | 39.15 sum of squares. ...-.--. .----- +£0'.097 10 8 38.07 | +0.30 | 38.37 E 11 7 38.03 | -+0.46 | 38.49 The pairs observed a greater number of 12 8 36.85 | +0.86 | 37.71] times do not seem more accurate. 13 8 37.61 | —0.23 | 37.38 : ee 14 10 39.11 | —0.70 | 38.41 | A correction indicated by the observa- 15} 10 37.68 | +0.02 | 37.70 | tions of —0’.072 for every minute in 16 7 35.44 | +0.81 | 36.25 Z ‘ 17 12 37.92 | +0.45| 38.37 the micrometer-corrections, or —0’.0925 6 0 ee a ms of a a for every revolution, has been applied 20] 10 37.14 | +0.20| 37.34] in the final result. 21 8 38.57 | +0.02 | 38.53 22 8 38.84 | —0.86.| 37.98 23 8 37.28 | +0.79 | 38.07 ASTRONOMICAL CO-ORDINATES OF GREEN RIVER, WYOMING. Longitude..---. ..---- 7h 17™ 528.438 08.027 or 109° 28! 06.57 + 0.40 west from Greenwich. PNG yaa Ramo cot socodio soca pees oo TSS 2h 09™ 408,312 08.027 or 32° 25! 04.77 west from U. 8. Naval Obsery- atory, Washington, D. C. 41° 31 38.12 + 0.10 north. U. S. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN, ist Lieut. GEO. M. WHEELER, Corps oF ENGINEERS, U. 8. ARMY, IN CHARGE. RESULTS or OBSERVATIONS MADE BY W. W. MARYATT AND JOHN H. CLARK IN THE DETERMINATION OF THE ASTRONOMICAL CO-ORDINATES OF STATION AT WINNEMUCCA, NEVADA. SEASON OF 1873. COMPUTATIONS BY Pror. T. H. SAFFORD anp JOHN H. CLARK. 155 WINNEMUCCA, NEVADA. GEOGRAPHICAL POSITION OF STATION. Longitude, . . .. . . . 1179 43’ 54.16 + 0.22 west from Greenwich. OB 40° 40! 52/36 west from U. S. Naval Observ- atory, Washington, D. C. Latitude,. ..: .... . 40°58' 19.97 + 0.17 north. Barometric altitude of observatory above sea-level, 4355.0 feet. Winnemucca, a station of the Union Pacific Railroad, is a flourishing settlement on Humboldt River, Nevada, situated in a sandy valley, which is surrounded in the distance by high hills. The astronomical monument was located in the northeastern part of the town, in an open lot, on a small elevation, which lifted it into full view of the river and the railroad. It was connected by triangulation with seventeen prominent points of the neighbor- ing mountains, and also by direct measurement with numerous objects in the town. Its position is 527 feet due west of the railroad-track, 1,538 feet from the depot, 507 feet from the mill, and 687 feet from the school-house. The meteorological conditions at this place were very favorable for astronomical observations. With few exceptions, the weather continued clear. During the fourteen days of time-exchanges, there were but four cloudy nights at Winnemucca and one at Salt Lake City, while on four other nights the wires failed, leaving for the exchange of signals five days, July 11, 16, 18, 24, 25, and 26. The wind was moderate, and its general direction was northeast and southwest. For a description of the observatory, instruments, and instrumentalities, see the report on the preceding station, Green River. The length of telegraphic circuit, by way of Ogden, at which point there was a repeater, was about 450 miles. Observations for latitude at Winnemucca were made July 15, 16, 18, 19, 21, 23, 24, 25, 26, 27, 28, 29, and 30. W. W. Maryatt was observer here, and John H. Clark at Salt Lake City. All of Mr. Maryatt’s obser- vations were reduced by Prof. T. H. Safford; those of Mr. Clark were computed by himself. 157 158 ASTRONOMY. Tabulation of stars used for determination of time at Winnemucea, Nevada, and Salt Lake City, Utah. Name of star. a 2) Lex rDad VPHSARLAVTD QAmvim a ~ mS OR YON e DRO ARTHAS BAA S z=) ibree's..-s.- sesce2 Urse Minoris.. -. -- Coron: 25-3-25--25 Serpentis :.....--.. Serpentis .......-.. Serpentis ......-..-. Urse Minoris..---. Scorpii ..-. Draconis .- Draconis\s---—- == QOphiuchi@=ss<- =-=5 Draconis) ==-------- Herenlis: 4<-s-2552 Herenlis=-----=---- Draconis; .22226--5- Draconigyesss--e5e0 iHerculis: ------ ---= Qphinchi====-5-—- Sagittarii ......... Ursx® Minoris~.--.-. Serpentis ..---..... Herculis------= .-=- Aquilz Cyenineseseaeaa==s WINNEMUCCA. Sols Sa leone Pb mb ia mb i I 3 i = 3 Lan) Lar) Lar) Lan) Lar) so6-5-|l-eseas Mx Bese. | egos weebce ox XM fesoosaleee see ES Sse oe SAn eH eons | laces BSS x oS llececoe x aseaice x SS Se Pecans ora 6 SSS" | Isc x x x Reaaes x x x xX wes Se x x xX x Reece Xx x x x eae x x x x SALT LAKE CITY. 5 = 1S ee} onl Qn nr nN b b bb ay Es = = = = = = = ary Lary ar ar) Me nosesc|lsooace)leS5e5 || ese) cesses} |ss5=- YS |lseeess|/e2=225) 02sec B§ || cesses! |esees|sess0- 2S |[eeeeee|oeoees|isseces TIME DETERMINATIONS. Observations and reductions for time taken at receiving station. SALT LAKE CITY, UTAH, JULY 11, 1873. 159 = I Name of star. Tr Aa. Bob. Ce. ae AR. jist; 5 hom. 8 3. 8. 8. hem. 8. Rams 8: hom. 8. W.| a! Herculis ........ 9 01 45.33 |— 0.98 |+ 0.04 |— 0.08 | 9 01 44.36 17 08 53.39 |+8 07 09.03 W.|v Serpentis ..-... 06 35.85 |— 1.66 |+ 0.02 |— 0.08 06 34.13 13 43, 22 09. 09 W.| a Ophiuchi.... .... 21 56.35 |— 0.91 |+ 0.01 |— 0.08 21 55. 37 29 04.39 09. 02 Weil) Herculisie-ns---- 34 22.88 |— 0.51 |— 0.03 |— 0.09 34 22.25 41 31.39 09.14 W.| y Draconis.-.-....-. 46 32.39 |+ 0.61 |+ 0.05 |— 0.13 46 32,92 53 42. 02 09. 10 W..| 72 Ophiuchi....... 54 13.82 |— 1.08 |+ 0.07 |— 0.08 54 12.73 }18 01 21.80 09. 07 E. | 7 Serpentis -.. --.|10 07 38.60 |— 1.40 |+ 0.03 |+ 0.08 |10 07 37.31 14 46. 41 09. 10 Bie UA quilses-sesveee 21 12.27 |— 1.54 |+ 0.03 |+ 0.08 21 10.84 28 19.95 09. 11 Bias) || Caen yreo acess ee. 25 31.40 |— 0.10 |4+ 0.10 |+ 0.10 25 31.40 32 40.54 09. 14 S| Ge yrs eee ces as 38 16.77 |— 0.32 |+ 0.13 |4+ 0.10 38 16. 68 45 25.62 |+8 07 08.94 Meantatalehvlocalisiderealtime ss. <.5 sen. ce ceewn ences es sceeteuccccwenee cceese +8 07 09. 07 NORMAL EQUATIONS. + 10.00 dt -++3.87a— 2.34c—=—7.28 dt —= ++ 08.07 + 3.87 dt-+2.60a— 0.39 e=— 5.01 a = — 28.026 — 2.34 dt — 0.39 a + 13.19¢= -+ 1.65 c= -+ 08.079 SALT LAKE CITY, UTAH, JULY 16, 1873. a g Name of star. Te Aa. Bb. Ce. An AR. AT. iS) hs m. 8. 8. 8. ay hom 8 hem. 8. hom. 8. E. | y Urse Minoris....| 7 13 49.55 |+ 3.06 |— 0.03 |4+ 0.39 | 7 13 52.97 |15 20 59.52 |4+-8 07 06.55 Be ey Coron) - es ee 22 13.96 |— 0,48 |+ 0.02 |-++ 6.13 22 18. 63 29 20.30 06. 67 E. | 78 Serpentis ...---. 28 04.44 |— 0.77 |+ 0.03 |+ 0.12 28 03. 82 35 10.46 06. 64 E. | @ Serpentis -.-.--- 30 56.64 |— 1.00 |+ 0.02 |+ 0.12 30 55.78 38 02. 41 06. 63 EK. | e Serpentis -...--. 37 25.17 |— 1.05 | 0.02 |+ 0.12 37 24.26 44 30.86 06. 60 Wea |oa Sconpites==s-- 45 46.62 |— 1.71 |+ 0.03 |— 0.13 45 44.81 52 51.41 06. 60 W.| B! Scorpii..-..----- 51 00.20 |— 1.64 |+ 0.03 |— 0.13 50 58. 46 58 05. 08 06. 62 We hon Ophinehitee-= == 8 00 37.96 |— 1.25 |+ 0.04 |— 6.12 | 8 00 36.63 |16 07 43.25 06, 62 Wie |i? “Herenlisi=------- 08 50.59 |+ 0.27 |-+ 0.10 |— 0.17 08 50.79 15 57.31 06. 52 W.| 7 Draconis.---.-.-.-. 15 11.12 |+ 1.35 |+ 0.16 |— 0.25 15 12.38 22 19.03 06. 65 W.| 6 Ophiuchi-.-- --.- 23 06.78 |— 1.41 |+ 0.06 |—.0.12 23 05.31 30 11.95 |+8 07 06.64 Meant atc localistderealttimets seas casa /eo sas “ce ee cise eecs ea tesesecees cee kee -+8 07 06.63 NORMAL EQUATIONS. + 11.00 d¢+- 2.59a— 0.28c=— 8.97 ot = — 08,37 + 2.59 di+7.34a— 5.44c—>— 14.63 a=— 18.780 — 0,28 dt —5.44 a+ 26.11 c= + 12.85 e=-+ 08,118 160 ASTRONOMY. Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, JULY 16, 1873. a = Name of star. IES Aa. Bb. Ce. 4 AR. rary ys S (5 Gos EE 8. 8. 8. hom, 2. hm. 8. him. 8. W.| y Draconis .--.---. 9 46 35.05 |4+ 0.50 |— 0.05 |— 0.20 | 9 46 35.30 |17 53 41.97 |+8 07 06.67 Wale22.Ophinchi=-=.—--= 54 16.44 |— 0.89 |— 0.03 |— 0.12 54 15.40 |18 01 21.80 06. 40 W.| uw! Sagittarii ....--.. 59 07.70 |— 1.60 |— 0.02 |— 0.13 59 05.95 06 12.51 06. 56 W.| 7 Serpentis----.-.-- 10 07 41.17 |— 1.16 |— 0.01 |— 0.12 |10 07 39.8 14 46.43 06. 55 E. |} 1 . 69 W.| 6 Ophiuchi-.-..--..| 8 00 38.96 |— 1.30 |+ 0.01 |— 0.11 | 8 00 37.56 |16 07 43.24 05. 68 W.| 7 Herculis .......- 08 51.65 |+ 0.28 |+ 0.03 |— 0.16 08 51. 80 15 57.28 05. 48 W.| 7 Draconis -------. 15 11.87 |+ 0.41 |+ 0.04 |— 0.23 15 12.09 22 18.97 05. 88 Wreilze Ophinchi) =-----= 23 07.71 |— 1.46 |+ 0.01 |— 0.11 23 06.15 30 11.94 |-+8 07 05.79 Mean:at 165:0 local sidereal time = 22-2 -- 2.2 eae a oe ae ee +8 07 05.72 NORMAL EQUATIONS. + 11.00 d¢+ 2.59 a— 028ce=>— 7.93 dt = — 08.28 + 259 6t+7.35a— 5.45c=— 14.91 a= — 15.850 — 0.28 dt —5.45 a+ 26.11 c= 4 13.02 e—-+ 05.109 TIME DETERMINATIONS. 161 Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, JULY 18, 1873. a g Name of star. Hk Aa. Bb. Ce. inte AR. (oxi, 3 hm 8 8. 8. 8. lies | ED hom. 8. h.m. 8. W.| y_ Draconis .....--.| 9 46 35.72 |+ 0.56 |+ 0.08 |— 0.22 | 9 46 36.14 |17 53 41.95 |+ 8 07 05. 81 W.| 72 Ophiuchi -...... 54 17.18 |— 0.99 |+ 0.04 |— 0,14 54 16.09 |18 01 21,81 05. 72 W.| # Sagittarii....... 59 08.80 |— 1.79 |+ 0.02 |— 0,15 59 06. 88 06 12.52 05. 64 W.| 7 Serpentis -..---. 10 07 42.16 |— 1.28 |+ 0.02 |— 0.14 |10 07 40.76 14 46, 44 05. 68 Ww. 14 55.88 |— 1.58 |4+ 0.01 |— 0.14 14 54,17 21 59, 87 05. 70 E. 21 15.52 |— 1.41 |— 0.01 |4+ 0.14 21 14,24 28 19.99 05. 75 E. 25 34.76 |— 0.09 |— 0.06 |+ 0.18 25 34.7 32 40.53 05. 74 E. 33 20.26 |— 0.13 |— 0.06 |+ 0.18 33 20. 25 40 26.13 05. 88 E. 33 22,20 |— 0.13 |— 0.06 |-+ 0.18 33 22.19 40 27,98 05. 79 E. 38 20.00 |— 0.30 |— 0.07 |+ 0.17 38 19. 80 45 25. 64 05. 84 E. 43 21.56 |-+ 4.15 |— 0,22 |+ 0.54 43 26.03 50 31.69 05. 66 By |G Aquila. ..-5----- 52 31.52 |— 0.87 |— 0.06 |4+ 0.14 GP B10) 78} 59 36.47 |+ 8 07 05.74 Meanvatplen ilocallisidereallitimose-aceec cece see oes cane os cote seeeurcn seek + 807 05.75 NORMAL EQUATIONS. + 12.00 d¢+2.07a-+ 5.25ce—=— 6.17 ot = — 05.25 + 2.07 dt-+ 8.27a— 9.80 ce—=—17.29 a—=— 15.864 + 5.25 dt — 9.80 a + 30.69 c= + 21,22 c=-+ 08.138 SALT LAKE CITY, UTAH, JULY 24, 1873. a EI Name of star. t Aa. Bb. Ce. a, AR. AT ra hm 8. 8. 8. 8. Rom. 3: hom. 8 hem. 8: Wisilteq COLON tee cere a 7 45 15.92 |— 0.49 |— 0.07 |— 0.11 | 7 45 15.25 |15 52 21.51 |+ 8 07 06.26 W.| 6! Scorpii -. 51 00.80 |— 1.74 |— 0.03 j— 0.11 50 58, 92 58 05. 02 06. 10 W.| 6 Ophiuchi -. -| 8 00 38.44 |— 1.32 |— 0.02 |— 0.10 | 8 00 37.00 |L6 07 43.19 06. 19 Weil|i7a lerculisha--e os 08 50.91 |+ 0.28 |— 0.03 |— 0,15 08 51.01 15 57.16 06. 15 Weaili7) Draconisi-osesce 15 11.37 |+ 1.44 |— 0.05 |— 0,21 15 12:55 22 18.77 06, 22 Boe Ophiuchiy--c- 2s: 23 07.09 |+ 1.49 |+ 0.01 |+ 0.10 23 05. 62 30 11.89 06. 27 Bley. Lerculigesses-> 31 28.01 |— 0.08 |+ 0.02 |4+ 0.13 31 28.08 38 34, 42 06, 34 E. Groombr. 2376. -- 36 11.55 |-+ 0.08 |+ 0.04 |+ 0.14 36 11.81 43 17.88 06. 07 Bee Ophiuchil: s2- 5-2 44 35.90 |— 1.00 |+ 0.04 |+ 0.10 44 35.04 51 41.25 06. 21 Heide Hercolis 22. 22-2 49 50.80 |— 0.28 [+ 0.04 |+ 0.12 49 50.68 56 56.81 |+ 8 07 06.13 Mean at 164.5 local sidereal time -..............--- aaah s cette ee Soe cea ocen! + 8 07 06.19 NORMAL EQUATIONS. “4-10.00 t+ 2.44a— 0.89c—=—2.75 dt= + 08.19 + 2.44 6t4+2,92a4 1.39¢=—4.94 a=— 15,890 — 0.89 dt + 1.39 a+ 17.02 c= — 1.00 c=-+ 05.104 162 ASTRONOMY. Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, JULY 24, 1873. ro | I Name of star. LoS Aa, Bb. Ce. the AR. Fava lis 5 hem. 8. 8. 8. Pee Wiese 6 WBS oS lin Ge 8 E. | o Draconis ..--.-.- 9 30 35.55 |+ 2.40 |4+ 0.17 |+ 0.43 | 9 30 38.55 |17 37 44.79 |+8 07 06.24 EK. | # Herculis .-...--. 34 25.34 |— 0.46 |+ 0.08 |+ 0.18 34 25.14 Am ieracs 06. 19 Brea | (ey ROO LACONIS === ayes 46 34.71 |4+ 0.55 |+ 0.08 |4+ 0.25 46 35.59 |; 53 41.67 06. 28 E. | 72 Ophiuchi -...--. 54 16.34 |— 0.98 |+ 0.02 |+ 0.16 54 15.54 |18 01 21.83 06. 29 W.| 2 Sagittarii -...... 59 08.15 |— 1.76 |+ 0.04 |— 0,17 59 06. 26 06 12.52 06. 26 W.| 7 Serpentis--..---. 10 07 41.59 |— 1.28 |+ 0.05 |— 0.16 |10 07 40.20 14 46,44 06. 24 w. IBrade2slseeseeee 14 55.38 |— 1.57 |+ 0.04 |— 0.16 14 53.69 21 59.89 06. 20 Wai) 1. Aquilies-s2-2---- 21 15.23 |— 1.41 |4+ 0.03 |— 0.16 21 13.69 28 19.99 06. 30 Wilke? sliyre 2s see eneee= 25 34.38 |— 0.09 |+ 0.06 |— 0.20 25 34,15 32 40.45 06. 30 Waal iG oliynes| pe oeene esse 33 20.18 |— 0.13 |+ 0.06 |— 0.20 30 19,91 40 26.11 06. 20 Wraylee iyi ee ye ane 33 21.94 |— 0.13 |4+ 0.06 |— 0.20 |10 33 21.67 |18 40 27.96 |+8 07 06.29 Mean‘ati18" local sidereall/ time: 222 22s 222 3c oo eo oa aiee ae ee ieee nisaee sseeeee| S07 06.20 NORMAL EQUATIONS. — 11.00 dt+2.60a+ 1.40c=— 2.30 ot = + 08.25 + 2.60 d¢+4.81a— 6.84ce=— 9.31 a =— 18.850 — 1.40 dt—6.84a 4 21.61c=-+ 15.66 ce =-+ 08,155 SALT LAKE CITY, UTAH, JULY 25, 1873. & eI Name of star. Th Aa. Bb. Ce. a AR. AT. B hm. 8. BS 8. a: hem: 8: [Pps (ere oF iWe|0l Ophinuchir =.= 8 00 38.37 |— 1.30 |— 0.03 |— 0.12 | 8 00 36.92 |16 07 43.18 |+-8 07 06. 26 Welem etlerenlis)esseeeee 08 51.00 |+ 0,28 |— 0.07 |-- 0.18 08 51.03 15 57.13 06.10 W.| 7 Draconis ... 15 11.39 J+ 1.41 |— 0.13 |— 0.25 15 12. 42 22 18.74 06. 32 W.| ¢ Ophbiuchi... 23 07.27 |— 1.46 |— 0.05 |— 0.12 23 05. 64 30 11.88 06. 24 B97 Herenlis ~--. ---- 31 28.04 |— 0.07 J+ 0.01 |4+ 0.15 31 28.13 38 34.40 06. 27 E. Groombr. 2376.--} 36 11.28 |+ 0.07 |+ 0.01 |+ 0.16 36 11.52 43 17.87 06. 35 E. | « Ophiuchi........ 44 35.80 |— 0.98 |+ 0.01 |+ 0.12 44 34.95 51 41.24 06. 29 H. | @ Hereulis’---22..- 49 50.92 |— 0.98 |+ 0.01 |+ 0.14 49 50.7 56 56. 80 06. 01 E. | a! Herculis .......- 9 01 47.80 |— 0.85 0.00 |+ 0.12 | 9 01 47.07 17 08 53.32 06. 25 E. |» Serpentis....-..--. 10 06 38.38 |— 1.52 0.00 |+ 0.12 06 36.98 13 43.19 |+8 07 06.21 Mean ‘at 164.5 local sidereall time <.-<.. 1-25 2<0--c-nncceee eee anne a= Saloons eee +8 07 06.23 NORMAL EQUATIONS. + 10.00 dt+2.54a+ 1.32 e =—2.26 ot= + 08.23 + 2.54 dt +2.89a+ 2.36 ce=— 4.55 a =— 18.855 + 1.82 dt+ 2.36 a+ 16.74 c=— 2.12 ec =-+ 03117 TIME DETERMINATIONS. 163 Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, JULY 25, 1873. a I Name-of star. Ws Aa. Bb. Ce. eS AR. AT. S b 8. es ae hom. 8. hem. 8. hom. 8. E. | «. Herculis 2 — 0.45 |— 0.01 |-+ 0.18 | 9 34 25.08 |17 41 31.32 |+8 07 06.24 E. | y Draconis ¢ + 0.54 |— 0.01 |+ 0.26 46 35.73 53 41,85 06. 12 E. | 72 Ophiuebi 32 |— 0.95 |-+ 0.01 |+ 0.16 54 15.54 /18 01 21.83 06. 29 E. | Sagittarii A — 1.70 |+ 0.01 |+ 0,17 59 06. 35 06 12.51 06. 16 W.| 7 Serpentis --.. : — 1.24 |+ 0.03 |— 0.16 |10 07 40.36 14 46. 43 06. 07 W. Bradley st giene see 14 55.34 |— 1.52 |+ 0.04 |— 0.17 14 53.69 21 59.89 06. 20 Wer |e Aquila <=. seo 21 15.33 |— 1.36 |+ 0.05 |\— 0.16 21 13.86 28 20.00 06. 14 Wien an iy rsely nee oae 25 34.40 |\— 0.09 |+ 0.07 |— 0.21 25 34.17 32 40.50 06. 33 Wiel Glo Wyre) a ocrecocse 33 20.18 |— 0.12 |4+ 0.06 |— 0.21 33 19.91 40 26.10 06. 19 WW} G2) Tyree ae ace 10 33 22.06 \— 0.12 ++ 0.06 i— 0.21 J10 33 21.79 |18 40 27.96 |+-8 07 06.17 Meantatrle™ Ovocalisidereal timens- sso = 5. cc eciioes oe nce ence eccae- ecec wes nceee +8 07 06.19 NORMAL EQUATIONS. + 10.00 dt + 3.92 a— 2.03 e=—5.45 ot = + 08.19 + 3.92 dt +3.12a— 1.21 e=—5.10 a =— 18.790 — 2.03 d¢t—1.21 a+ 13,94 c= + 4.07 ce =-+ 05.163 SALT LAKE CITY, UTAH, JULY 26, 1873. = g Name of star. i Aa. Bb. Ce. a, AR. faxits Ss) hems, Sa: 8. 8. 8. Ma tity 8 hm 8 losei0ae CB Wallpen Coronsreees sos 7 45 16.02 |— 0.46 |— 0.05 |— 0.19 | 7 45 15.32 |15 52 21.48 |+8 07 06.16 WE) BEsScorpliees saeses 51 00.74 |— 1.62 |— 0.03 |— 0.18 51 58.91 58 05. 00 06. 09 Wala) Opbinchimee..-25 8 00 38.64 J— 1.23 |— 0.07 |— 0.17 | 8 06 37.17 |16 07 43.17 06. 00 Wiltz klerouligne sans" 08 51.29 |4- 0.26 |— 0.17 |— 0.25 08 51.13 155411 05. 98 Be 7) Draconis .-.2-- 15 11.09 J+ 1.24 |— 0,22 |+ 0.36 15 12.57 22 18. 69 06.12 EB. | ¢ Ophiuchi.-...... 23.07.10 |— 1.39 |— 0.08 |+ 0.18 23 05.81 30 11.87 06. 06 Bal 7 elerculishseece-e 31 28.31 |— 0.07 |— 0.14 |+ 0,22 31 28. 32 38 34.40 06. 08 E. Groombr. 2376 .-.| 36 11.67 |4+ 0.07 |— 0.13 |+ 0.23 36 11,84 43 17.86 06. 02 Beak) Ophiunchiee----- 44 36.03 |— 0.93 |— 0.09 |+ 0.17 44 35.18 bIPAIs 25 06. 07 |; @) Herculis s.--~-.- 8 49 51.12 J— 0.26 J— 0.12 J+ 0.20 | 8 49 50.94 |16 56 56.78 |+8 07 05.84 Mean: it455 local sidereal time@recse ses eeaseace eases ace ease cass «-aeicces sq |--o 07 06,04 NORMAL EQUATIONS. 4+ 10.00 dt-++2.44a-+ 3.35 e——3.30 bt = + 08.04 + 2.44 dt-+2.92a— 181¢—=—5.37 a =— 15.760 + 3.35 dt —1.81 a+ 17.01 c= + 6.24 ¢ =-++ 08.172 164 ASTRONOMY. Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, JULY 26, 1873. a I Name of star. 7 Aa. Bb. Ce. Ar AR. ATs 3 hem. 8. 8. 8. 8 Tei eS: hm. 8. hm 8. Bical Op hin hits sete 9 54 16.55 |— 0.84 |— 0.10 |+ 0.08 | 9 54 15.69 |18 01 21.84 |+8 07 06.15 E. | #2 Sagittarii -....-- 59 08.02 |— 1.51 — 0.05 |+ 0.08 59 06, 54 06 12.51 05. 97 E. | 7 Serpentis.....-.-. 10 07 41.46 |— 1.10 |— 0.04 |+ 0.08 |L0 07 40.40 14 46.43 06. 03 E. Bradn2olosseeees 14 55.19 |— 1.35 |— 0,02 |+ 0.08 14 53. 90 21 59.89 05. 99 Bie eleeA quileee=a=ieceer= 21 15.17 |— 1.21 — 0.02 |4+ 0.08 21 14.02 28 20. 00 05. 98 Winans ayraieesetese ee 25 34.44 |— 0.08 |+ 0.03 |— 0.10 25 34.29 32 40.50 06. 21 Vivo || GE INES) soence osace 33. 20.24 |— 0.11 |-+ 0.04 |— 0.10 33 20. 07 40 26.10 06. 03 MWe || GP LAE osos coososs 33 22.15 |— 0.11 |+ 0.06 |— 0.10 33 22. 00 40 27.95 05. 95 Wie || (6b TMi) 55 cecoses 38 19.89 |— 0.25 |+ 0.07 |— 0.09 38 19. 62 45 25. 62 06. 00 W.| 50 Draconis ......-.. 43 21.91 |+ 3.55 |4+ 0.24 |— 0.30 |10 48 25.40 |18 50 21.40 |48 07 06.00 Meantati18":5 locallsidereal time sseesaenitesce eee neeteee ie ceceecce ences eee = fies 07 06.03 NORMAL EQUATIONS. +10.006 +1°0a— 381c=— 2.99 dt—= + 08.03 — 1.90 d¢+ 7.96 a+ 12.27 c=—11.68 a =— 18.590 — 3.81 dt + 12.27 a + 27.02 e=—17.55 e =- 08.077 Observations and reductions for time taken at sending station. WINNEMUCCA, NEVADA, JULY 11, 1873. a I Name of star. iit Aa. Bb. Ce. T. NR ee NE ) h. m. 8. 8. 2, OS |0s ita Ves Wo 8 8. W.| « Ophiuchi-....-.. 16 51 56.98 |+ 0.51 |\— 0.13 |4+ 0.03 |16 51 57.39 16 51 41.31 — 16.08 We|@) Herenlish=-4-—- 57 13.06 |+ 0.14 |— 0.20 |4 0.03 57 13.03 56 56. 94 16. 09 W.| 44 Ophiuchi.-..-.-. 17 18 54.48 |+ 0.95 |— 0.12 |+ 0.03 |17 18 55.34 {17 18 39.21 16.13 Wale) Draconise.------ 27 52.74 |+ 0.31 |\— 0.44 |4+ 0.04 27 52.03 27 36.24 15.79 iW..| © Draconis\-----.-- 38 02.64 — 1.24 |— 0.74 |+ 0.07 38 00.73 7 45.16 15.57 Hieaiitys (Taconisiza-. es - £3 58.60 — 0.28 |— 0.45 |— 0.04 53 57.83 53 41.92 15. 91 E. | o Herculis ........ 18 02 53.34 |— 0.23 |— 0.23 |— 0.03 |18 02 53.31 }18 02 37.43 15. 88 E. | 7 Serpentis -.----. 15 01 48 |+ 0.67 |— 0.09 |— 0.038 15 02.03 14 46.47 15. 56 1h || il AG pits nap oeee 28 35.14 |+ 0.73 |— 0.11 |— 0.038 28 35.73 28 19.95 15.78 HB. | @ Lyre 2=---.----- 32 56.78 |+ 0.05 |— 0.23 |— 0.03 32 56. 57 32 40,55 16, 02 105 || (Owl) Soros cose 45 41.80 |+ 0.15 | — 0.30 |— 0.038 45 41. 62 45 25. 60 16. 02 E. | 50 Draconis ----.... 50 51.78 |— 2.13 |— 0.85 |— 0.10 50. 42. 70 50 31. 8&7 16.83 W.| 6 Draconis......--. 19 12 51.76 }— 1.11 |— 0.638 |+ 0.07 |19 12 50.09 |19 12 34.44 15. 65 AW/5y|| (oh (Oat Aas aseascc 25 53.70 |-+- 0.25 |— 0.30 |4 0.03 |19 25 53.68 |19 25 38.13 — 15.55 NORMAL EQUATIONS, Ao = + 18.07 Co = — 08.15 A To =— 155.84 O—-+ 0.344 43.090 da+ 0.926 de+2.704d AT da=—05112 Weight of a= 2.17 0 —— 1.630 + 0.926 da + 14.000 de + 0.388d A T de = + 08.125 c = 13.69 O=—+0.61142.704da+ 0.388de+8437dAT dAT=—05,042 AT= 6.06 TIME DETERMINATIONS. 165 Observations and reductions for time taken at sending station—Continued. WINNEMUCCA, NEVADA, JULY 16, 1873. a EI Name of star. HN Aa. Bb. Ce. ui AR. (X65 a hom. 8 8. 8. a Me CPs GE hem 8 8. W.!| B {14 51 21.42 |+ 1.43 |+ 0.02 |+ 0.64 |14 51 23.51 |14 51 08.45] — 15.06 W.| B 57 25. 86 0.00 |+ 0.01 |+ 0,23 57 26.10 57 11.28 14, 82 w.| B 15 10 27.12 |— 0.53 0.00 |+ 0.17 |15 10 26.76 |15 10 11.97 14.79 W. | pz 19 57.84 |— 0.05 0.00 |+ 0.22 19 58.01 19 43.19 14, 82 W.| a 29 35.04 |— 0.18 0.00 |+ 0.19 29 35. 05 29 20.29 14.76 KE. | a Serpentis.......- 38 17.86 |— 0.39 0.00 |— 0.17 38 17.30 38 02. 42 14, 88 E. | « Serpentis... -... 44 46.24 |— 0.40 0.00 |— 0.17 44 45, 67 44 30.84 14. 83 E. | ¢ Urs Minoris....| 48 55,42 |+ 2.01 |— 0.02 |— 0.83 48 56.58 48 42.09 14. 49 en | Gee SCOR pI seater 58 20.72 |— 0.63 0.00 |— 0.18 58 19,91 58 05. 08 14. 83 E. Groombr. 2320-...|16 06 16.10 |+ 0.84 |— 0.01 |— 0.53 |16 06 16.40 |16 06 01.59} — 14,81 NORMAL EQUATIONS. A = — 05.69 Co = — 08.05 AT) =— 148.86 — 08.02 (T — 164.8) 0 =— 0.019 + 2.947 da + 0.453 de + 2.536 dAT da = -+ 08.008 Weight of a=1.86 0 = + 1.209 + 0.453 da + 10.000 de — 0.179 dAT de = — 08,120 c= 9.85 0 = — 0.159 + 2.536 da— 0.179de+6.082dreT daT=-+ 05.019 (VSB Hey/ WINNEMUCCA, NEVADA, JULY 16, 1873. = 5 Name of star. TH Aa. Bb. Ce. WWE AR. AT. 5 lds dy FS ch 8. 8. Rem. 28 lie tite 05 ch E. | 44 Ophiuehi 17 18 54.96 |— 0.81 0.00 |— 0.13 {17 18 54,02 |17 18 39.21] — 14,81 E. | 8 Draconis 28 50.96 |-+ 0.27 |4+ 0.01 |— 0.19 28 51.05 27 36.17 14.88 E. | ® Draconis 37 59.46 |+ 1.05 |+ 0.03 |— 0.32 38 00. 22 37 45. 01 15} Pal E. | x Herculis 41 46.64 |\— 0.21 |+ 0.02 |— 0.13 41 46, 32 41 31.37 14.95 E. | @ Herculis 52 11.04 |— 0.07 |+ 0.02 |— 0.15 52 10. 84 51 56. 03 14. 81 W.| o Herculis 18 02 52.48 |— 0.20 |+ 0.05 |+ 0.13 |18 02 52. 46 |18 02 37.29 15.17 W.| » Sagittarii -...--. 06 28.18 |— 0.77 |+ 0.02 |+ 0.13 06 27.56 06 12.52 15. 04 W.| 7 Serpeutis-.-.---- 15 01.72 |— 0.56 |+ 0.02 |+ 0.12 15 01.36 14 46, 48 14, 88 W.| 109 Herculis ........ 18 34.18 |— 0.29 |+ 0.01 |+ 0.13 18 34. 03 18 19.29 14.74 Wel Ls Aquilesta22- -o2r 28 35.44 |— 0.62 |— 0.02 |+ 0.12 28 34.92 28 19.98 14.94 Walia? TBirvmeaie 2a see cer 32 55.24 |— 0.04 |— 0.06 |4+ 0.15 32 55. 29 32 40.54 14.75 WS (Bb Thyme. oS. 22c, 45 40.50 |— 0.13 |— 0.08 |+ 0.15 45 40. 44 45 25. 61 14. 83 W.| 50 Draconis ........ 8 50 44.58 |+ 1.81 |— 0.23 |+ 0.46 /18 50 46. 62 i 50 31.74| — 14.88 NORMAL EQUATIONS. dy =— 0°69 @m=—O0805 AT»>=—14:.86—0*.02 (T—16".8) 0 = + 0.313 + 3.463 da — 1,952 de + 3.552 dAT da = — 08.125 Weight of a= 1.96 0 = + 0.635 — 1.952 da + 13.000 de — 3.034 dA T dc =—- 08.068 o— 1169 0 = + 0.270 +4 3.552 da -- 3.084de4 8.606daT daT=— 08,004 AT= 4.87 166 ASTRONOMY. Observations and reductions for time taken at sending station— Continued. WINNEMUCCA, NEVADA, JULY 18, 1873. a EI Name of star. i Aa. Bb. Ce. nue AR. AT. 3 h. m. 8 8. 8. Gs leaps | Oe We aps eh 8. Bs a? Tibres see ee 14 44 06.86 |-+ 0.36 0.00 |+ 0.11 114 44 07.11 |14 43 52.64] — 14.47 i. | B Urse Minoris .-- 56 24.26 |— 0.88 |+ 0.01 |— 0.42 56 22. 97 51 08.31 14. 66 Bie) Wibres ss. se. 15 10 26.20 |+ 0.32 |— 0.01 |— 0.11 15 10 26.40 {15 10 11.95 14, 45 E. | y Urse Minoris-...| 21 15.00 |— 0.71 |— 0.05 |— 0.36 21 13. 88 20 59. 60 14. 28 en eae Coron eee sees 29 34.62 |+ 0.11 \— 0.03 |— 0.12 29 34.58 29 20.26 14, 32 W.| a Serpentis..-...... 38.16.46 |-+ 0.23 |— 0.03 |4+ 0.11 38 16.77 38 02. 40 14. 37 W.|« Serpentis..-..-.-- 44 44.94 |+ 0.25 |— 0.04 [4 0.11 44 45, 26 44 30.83 14, 43 W.| ¢ Urs Minoris..-- 48 57.50 |— 1.24 |— 0.20 |4+ 0.54] - 48 56.60 48 41.90 14.7 Ware! Sconupives---e—-—— 15 58 19.04 |+ 0.39 |— 0.02 |4 0.12 |15 58 19.53 |15 58 05.07 | — 14.46 NORMAL EQUATIONS. do = + 03.41 Co =— 0.513 A To=— 148.49 — 08.020 (T — 164.8) 0 =— 0.139 + 3.700 da — 0.652 de + 3.307 d AT da = -+ 08.009 Weight of a=1.73 0 =— 0.187 — 0.652 da + 9.000 de + 0.273 d A'T dc = + 08,020 c=8.63 0 =— 0,241 + 3.307 da + 0.273 de+5.770d AT dAT=+ 08.035 AL ies WINNEMUCCA, NEVADA, JULY 18, 1873. a = Name of star. Ath Aa. Bb. Ce. 10 AR. Zit to) . hanes: Fh 8. 8 hem. 8. hom. 8. a Wao sD raconism-ceeaee 17 37 59.52 |— 0.45 |— 0.04 |+ 0.53 |17 37 59.56 |L7 37 44.94 — 14.62 W.|# Herculis ..-..... 41 45.46 |-+ 0.09 |— 0.02 |+ 0.22 41 45.75 41 31.26 14, 39. W.| 6 Herculis -..-.... 52 10.14 |+ 0.03 |— 0.02 |4+ 0.24 52 10.39 51 56. OL 14. 38 Welly) Draconis -ss---= 53 56.46 |— 0.10 |— 0.93 |4+ 0.31 53 56. 64 53 41.85 14.7 W..|'o Herenulis ...- .--- 18 02 51.68 |+ 0.08 |— 0.04 |+ 0.22 |18 02 51.94 |L8 02 37.42 14.52 E. | 6 Urs Minoris---. 13 54.12 |— 4.13 |— 0.54 |— 3.25 13 46. 20 13 33.06 13. 14 E. | 109 Herculis -. ...... 18 33.96 |+ 0.12 |— 0.05 |— 0.21 18 33. 82 18 19.29 14.53 y. | 1 Aquila 28 34.52 |+ 0.26 |— 0.04 |— 0.20 28 34.54 28 19.99 14.55 195 |) @ Weve gases ; 32 55, 44 |+ 0.02 |— 0.08 |— 0,25 a) Bish, 113} 32 40.54 14.59 106 || /o) Went eoeeos os 5 45 40.36 |+ 0.06 |— 0.07 |— 0.23 45 40,12 45 25. 61 14. 51 E. | 50 Draconis 18 50 48.02 |— 0.76 |— 0.20 |— 0.76 |18 50 46.30 {18 50 31.69] — 14.61 NORMAL EQUATIONS. a=+0%41 c=—0813 ATy==—14*.49 — 0.020 (T — 164.8) O=-+ 0.143 + 1.885 da + 0.130 de 4+ 1.172daT da=— 08.066 Weight ofa= 1.65 0 = + 0.708 + 0.130 da + 11.000 de + 0.308 da T de = — 05.063 c= 10.98 O=-+ 0.151 + 1.172 da +- 0,308 de + 5.923 daT dAT =— 08.009 AT= 5.19 TIME DETERMINATIONS. 167 Observations and reductions for time taken at sending station—Continued. WINNEMUCCA, NEVADA, JULY 24, 1873. rv 5 Name of star. dts Aa, Bb. Ce. Ive AR. AT. a hm 8. 8. 8. 8, Ae Tee Bs lita ES 8. W.| y Urs Minoris.-../15 21 14.08 |— 0.92 |— 0.23 |4 0.33 /15 21 13.26 |15 20 59.22 | — 14.04 Wei @ -Coronsice-.---- 29 33.96 |+ 0.14 |— 0.09 |+ 0.11 29 34.12 29 20.18 13.94 W.| @ Serpentis -...-... 38 15.96 |-+ 0.30 |— 0.06 |+ 0.10 38 16.30 38 02. 34 13. 96 W.| e« Serpentis -..---. 44 44,48 |+ 0.32 |— 0.06 [4+ 0.10 44 44,84 44 30.77 14. 07 W.| ¢ Ursx Minoris....| 48 57.34 |— 1.59 |— 0.30 |+ 0.48 48 55.93 48 41.31 14. 62 E. Groombr. 2320. ../16 06 16.12 |— 0.66 |— 0.17 |— 0.27 |16 06 15.02 |16 06 01.22 13. 80 Ey |e Ophiuchi -----.- 11 51.66 |+ 0.38 |— 0.05 |— 0.10 11 51.89 11 37.89 14. 00 Bee) eeLencolis¢s se -=-- 16 11.54 |— 0.08 |— 0.10 |— 0.14 16 11.22 15 57. 22 14.00 Be) | a) Elerculis):--- ---- 19 49. 02 |+ 0.25 |— 0.06 |— 0.10 19 49,11 19 34.93 14,18 Bee) @) SCOMpis= 225 --4- 21 53.08 |+ 0.55 | 0.03 j— 0.11 21 53. 49 21 39.39 14.10 |G eOphiachi= =. ---- 16 30 25.60 |+ 0.43 |— 0.04 |— 0.10 |16 30 25.89 /16 30 11.90} — 13.99 NORMAL EQUATIONS. do = + 08.45 Co = 08.00 AT )=—135,99 [rate assumed = 0] O0=-+ 0.042 + 3.739 da+ 2.042 de-+ 3.576 dAT da = -+ 08.088 Weight of a= 1.80 0=-+ 0.986 + 2.042 da + 11.000 de+-1.519d@AT dc = — 08,099 c= 9.84 0=-+ 0.177 + 3.576 da-+ 1.519 de + 7.224daT adAT=— 08.047 AT=3.78 WINNEMUCCA, NEVADA, JULY 24, 1873. = g Name of star. Ty Aa. Bb. Ce. ae ARS eee AGL: a Tem 8: 8. 8. 8. h. 8. Rhames 8: ce Heim Herenlisy-2---- 17 10 53.48 |+ 0.03 |— 0.06 |+ 0.05 |17 10 53.50 |17 10 39.49} — 14.01 E. | 44 Ophiuchi-....--. 18 52.76 |+ 0.37 |— 0.02 |+ 0.04 18 53.15 18 39.19 13. 96 E. | @ Draconis...---- 27 50.32 |— 0.12 |— 0.10 |4 0.07 27 50.17 27 36.03 14.14 E. | o Draconis....... 37 59.42 |— 0.49 |— 0.20 |+ 0.11 37 58. 84 37 44.73 14.11 E. | #1 Herculis -..-.-. 41 45,22 |+ 0.10 |— 0.10 |+ 0.05 41 45,27 41 31.32 13. 95 W.|y #£Draconis-...-.-. 53 56.02 |— 0.11 |— 0.17 |— 0.06 53 55. 68 53 41.76 13. 92 W.|o Herculisi-<2--2- 18 02 51.50 |+ 0.09 |— 0.13 |— 0.05 |18 02 51.41 |18 02 37.39 14, 02 W. fe Sagittarii ...... 06 26.36 |+ 0.36 |— 0.06 |— 0.04 06 26. 62 06 12.52 14. 10 W. Serpentis ...---. 15 00.40 |+ 0.26 |— 0.10 |— 0.04 15 00. 52 14 46.49 14, 03 W. 109 Herculis ...---- 18 33.30 |+ 0.13 |— 0.14 |— 0.04 18 33.25 18 19.28; — 13.97 NORMAL EQUATIONS. ao = + 08.45 Co = 08.00 ATo=— 135.99 [rate assumed — 0] 0 = + 0.318 + 2.585 da — 1.395 de + 2.692 dAT da =— 08.073 Weight of a=1. 37 0 =— 0.523 — 1.395 da + 10.000 de — 0.792 dAT de = +. 08.040 c— 914 0 = + 0.408 + 2.692 da — 0.792 de + 6.646 dAT daT =— 05.027 AT=3.80 168 ASTRONOMY. Observations and reductions for time taken at sending station—Continued. WINNEMUCCA, NEVADA, JULY 25, 1873. > EI Name of star. Ti Aa. Bb. Ce. Ty. AR. AT. S ls is ER a: 8. 8. haan. es. hsm: 7s; Wa 8 Labres-se-s see 15 10 25.10 |4+- 0.42 |— 0.03 |+ 0.09 |15 10 25.58 |15 10 11.87 | — 13. 71 W.| y Urs Minoris....} 22 13.68 |— 0.92 |— 0.33 |+ 0.29 22 12.72 20 59.15 13. 57 Walla «Coron. eeoe 29 33.72 |+ 0.15 |— 0.17 |+ 0.10 29 33.80 29 20.16 13. 64 W.| a Serpentis.--.--.-. 38 15.76 |+ 0.31 |\— 0.14 |4 0.09 38 16.02 38 02.33 13. 69 W.| « Serpentis.-- eg 44 44.26 |+ 0.32 |— 0.13 |4+ 0.09 44 44,54 44 30.76 13.78 W.| ¢ Urse Minoris- 48 57.28 |— 1.60 |— 0.62 |4 0.43 48 55. 49 48 41,21 14, 28 BG" ‘Scorpil-2--55---— 58 18.42 |-+ 0.50 |— 0.08 |— 0.09 58 18.75 58 05.01 13.74 E Genghis: 2320. ..|16 6 16.14 |— 0.66 |— 0.37 |— 0.24 |16 06 14.87 /16 06 01.17 13.70 Ba\e7 Herculisie--5-- 2 6 11.34 |— 0.08 |— 0.22 |— 0.13 16 10.91 15 57.21 13.70 Bees Ophiaehis-----—- 30 25.38 |+ 0.43 |— 0.09 |— 0.09 30 25. 63 30 11.88 13.75 Bie a7 elerculisies-soe—- 16 38 48.38 |+ 0.02 |— 0.17 |— 0.11 16 38 48.12 |16 38 34.43) — 13.69 NORMAL EQUATIONS. ay = — 08.44 Cp = — 05.08 AT)=— 135.72 [rate assumed = 0] 0 =— 0.354 +4 3.526da+ 0.098 de + 3.205daT da = + 05.101 Weight of a= 2.04 0 = + 0.075 + 0.098 da + 11.000 de — 0.615 da T dc = — 05.008 e=10.87 0 = — 0.328 + 3.205 da — 0.615 de+ 6.951aAT daT= 05,000 AT= 3.99 WINNEMUCCA, NEVADA, JULY 25, 1873. Name of star. 7. Aa. Bb. Ce. AEE AR. tS) its iS 8. 8. 8. ees oe home 8: EB. | @ Draconis ---..---- 17 27 50.24 |— 0.09 |— 0.16 |— 0.11 }17 27 49.88 |17 27 36.01 E.|o Draconis ..- Ps 7 59.32 |— 0.37 |— 0.25 |— 0.19 37 58.51 37 44.69 E. | « Herculis .-- -| 41 45.06 |+ 0.08 |— 0.12 |— 0.08 41 44.94 41 31.32 Baleo) Herculisy--s2=--5 52 09.84 |+ 0.02 |\— 0.16 |— 0.09 52 09. 61 51 55.95 Wilno) Uelerculisi--ee-== 18 02 51.22 |+ 0.07 |— 0.16 |+ 0.08 }18 02 51.21 |18 02 37.39 W.| 6 Urse Minoris-... 13 48.70 — 3.49 |\— 1.93 |+ 1.17 13 44. 45 13 31.23 Walia. Dayres soe ssccse 32 54.26 |+ 0.02 |— 0.23 |+ 0.09 32 54.14 32 40.51 Vivo || (oi La oecccsocene 45 39.44 |+ 0.05 |— 0.21 |+ 0.09 45 39. 37 45 25.60 Wi. 50 Draconisi-.---- -- 18 50 46.14 |— 0.64 |— 0.59 |+ 0.27 |18 50 45.18 |18 50 31.44 NORMAL EQUATIONS, do = + 05.44 Cp = — 02.08 AT») =— 135.72 [rate assumed = 0] O0=+ 0.246 +1.718da+ 1.236 de-+ 0.066dAT da = — 08.151 Weight of a = 1.57 0= + 0.075 + 1.236 da + 10.000 de — 0.215 daT de = + 08.011 c =9.09 0=-+ 0.007 + 0 066 da— 0.215 de4+ 4.06)dAT dAT=-+ 05,001 AT=4.06 Clamp. TIME DETERMINATIONS. 169 Observations and reductions for time taken at sending station—Continued. WINNEMUCCA, NEVADA, JULY 26, 1873. | Clamp. 444445 5b ee Name of star. © Aa. Bb. Ce. a AR. AT. hm. 8. 8. 8. 8. lie Gil Es he pty 8. fe W.| y Urs Minoris..../15 21 13.38 |— 1.38 |— 0.39 |+ 0.32 |15 21 11.98 |15 20 59. 09 — 12.89 Wale) Coron ---.---5 29 33.24 |+ 0.21 |— 0.15 |4+ 0.11 29 33. 41 29 20.15 13. 26 W.| @ Serpentis........ 38 15.30 |+ 0.44 |— 0.12 |4+ 0.10 38 15. 72 38 02. 31 13. 41 W.| e Serpentis._...... 44 43.66 |+ 0.46 |— 0.11 |+ 0.10 44 44,11 44 30.75 13. 36 W.|¢ Ursx Minoris.... 48 57.08 |— 2.30 |— 0.55 |— 0.48 48 53.75 48 41.11 13. 64 1d, || fe) Sen eS eo eses 58 17.74 |+ 0.72 |— 0.07 |— 0.10 58 18.29 58 95. 00 13. 29 E. Groombr. 2320 ...|16 06 15.98 |— 0.95 |— 0.34 |— 0.26 |16 06 14.43 /16 06 01.11 13. 32 E. | 7 Herculis -...-.-. > 10.98 |— 0.11 |— 0.18 |— 0.14 16 10.55 15 57.19 13. 36 Dy @ Soh iesseacencs 51.96 |+ 0.80 |— 0.05 |— 0.11 21 52. 60 21. 39. 37 13. 23 E. |} ¢ Ophiuchi-.-. “i 24,82 |+ 0.62 |— 0.06 |— 0.10 30 25. 28 30 11.88 13. 40 E. | 7 Herculis ..-..-.-.- 48. 02 |+ 0.03 |— 0.11 |— 0.13 |16 33 47.81 |L6 38 34.41 — 13.40 NORMAL EQUATIONS. Ay = + 08.75 Co = — 08.10 AT» =— 138.39 [rate assumed = 0] 0 =— 0.292 + 3.790 da+ 1.784de+3.276d AT da = + 08.028 Weight of a= 2.07 0 =— 0.142 + 1.784 da + 11.000 de + 1.271 d AT dc = + 08,002 c=10.14 0 =— 0.4714 3.276da+ 1271de+6.781d AT daT =-+ 08.055 AT= 3.95 WINNEMUCCA, NEVADA, JULY 26, 1873. Name of star. TY, Aa, Bb. Ce. ne AR. AT. hm. 8. 8. 8. 8. lip its Gb Rams 8: 8. ~ Draconis, pr----|17 44 30.06 |— 1.35 + 0,11 |— 0.19 /17 44 28.63 |17 44 15.22 | — 13.41 (i) alee) soedase 52 09.20 |+ 0.06 |+ 0.06 |— 0.07 52 09. 25 51 55.95 13. 30 y Draconis. -.-.. 53 55.36 |— 0.23 |+ 0.08 |— 0.09 53 55. 12 53 41.73 13. 39 o Herculis ...---.|18 02 50.50 |+ 0.19 |+ 0.03 |— 0.07 /18 02 50.65 /18 02 37.38 13. 27 yj) Sagittarii ....-. 06 25.10 |+ 0.75 |+ 0.08 |— 0.06 06 25. 87 06 12.52 13. 35 7 Serpentis ...--. 14 59.26 |+ 0.55 |— 0.01 |4+ 0.06 14 59. 86 14 46.49 13. 37 109 Herculis ..-...-. 18 32.30 |+ 0.28 |— 0.02 [4 0.06 18 32.62 18 19. 27 13. 35 1 Aquile*........| 28 32.58:/+ 0.61 |— 0.04 |4 0.06 28 33.21:| 28 20.00 [13.21] G” Wyaty aacoce anes 32 53.68 |-+ 0.04 |— 0.07 |+ 0.08 32 53.73 32 40.50 13. 23 fo ARES cdodoecnd 45 38.74 |+ 0.13 |— 0.06 |+ 0.07 45 38.88 45 25.59 13. 29 50 Draconis...---- 18 50 46.60 |— 1.77 |— 0.17 |+ 0.23 |18 50 44.89 |18 50 31.40 | — 13.49 *1 Aquilz noted as doubtful in original book. NORMAL EQUATIONS. - do=+ 08.75 Co = — 08.10 AT o=— 135.39 [rate assumed = 0] 0 = — 0.204 + 2.060 da— 0.177 de+1.790dAT da = -- 08.046 Weight of a=1.52 0 = — 0.386 — 0.177 da + 10.000 de — 0.267 dAT de = + 08.041 c=9.98 0 =— 0.461 + 1.790 da — 0.267 de + 5.987 dAT dAT=-+ 05.065 AT=4.43 ASTRONOMY. The following tables give the corrections and rates of the chronometers used at Winnemucca and Salt Lake City: CHRONOMETER AT WINNEMUCCA.—Nzecus, No. 1499. Date. Local sidereal Correction of chro- Adopted hourly time. nometer. rate. h. 8. 138.0 — 15.882 16.8 — 14. 85% 16.8 — 14.477 17.0 — 14. 027 17.0 — 13.720 17.0 — 18.350 CHRONOMETER AT SALT LAKE CITY.—NeEcts, No. 1511. Date Local sidereal | Correction of chro- | Adopted hourly ; time. nometer. rate. 1873. h. h. m. 8. 8. July 11 18. 0 + 8 07 09.07 — 0.026 July 16 17.0 06. 60 — 0.019 July 18 17.25 05. 72 — 0.013 July 24 7.23 06, 22 0. 000 July 25 17.25 06. 21 — 0.004 July 26 17.5 + 8 07 06.04 — 0.007 ; Final results of longitude. rr Mean of sig-} -p- “ Difference|= .= Signals sent from—| Recorded at— jnalssentand Ee sruettod of longi- ees Means. received. zs . tude. of AF July 11, 1873: a a hm. 8. h. m8. hem 8 m. 8. 8. | ™. 8 : =n (i Salt Lake City.| 8 36 55.75 | +8 07 09.10 16 44 04.85 Salt Lake City. § Winnemucea .-16 21 00.00 | —0 00 15.88 16 20 44.12 | 23 20.73 : alt Lake City.| 8 43 55.86 | +8 07 09.10 |16 51 04.96 AGREES ; Winnemucea ..|16 28 00.12 | —0 00 15.88 |16 27 44.24 | 23 20.72 |....| 23 20,725 July 16, 1873: wt. Salt Lake City-| 9 14 46.66 | +8 07 06.59 17 21 53.25 Salt Lake City. § Winnemucca ../16 58 47.46 | —0 00 14.86 16 58 32.30 | 23 20.95 Winona Salt Lake City-| 9 20 19.45 | +8 07 06.59 17 27 26.04 my Winnemucca ..'17 04 20.15 | —0 00 14.86 |17 04 05.29 | 23 20.75 |...-] 23 20. 850 July 18, 1873: Q, Be oe Salt Lake City. 9 22 17.62 | +8 07 05 72 |17 29 23.34 Salt Lake City. i Winnemucca .. 17 06 17.14 | —0 00 14.49 |17 06 02.65 | 23 20.69 Wii cetees Salt Lake City.| 9 28 00.60 | +8 07 05.71 |17 35 06.31 : ae ; Winnemucea ..|/17 12 00.05 | —0 00 14.49 |17 11 45.66 | 23 20.75 |....] 23 20.720 ASTRONOMICAL STATION—WINNEMUCOA, NEVADA—1873. Final results of longitude—Continued. Signals sent from—] Recorded at— Mae reer PRC CONEY, received. 7 July 24,1873: : Reza hom 8. sas Lato iy §] State |S | 3G Winnemucca ..}) Winnemucea” [16 52 30.14 | 0 00 14.03 July 25, 1873: ; Salt Lake City. } | Winnemucea [17 02 25.20 | 0 00 1872 winnencen || tanec 23 Sat | 5 Sw July 26, 1873: ; st Lake Gif] Seneca 2 a6 1P05 | 45 ae winnmncen {| tanec 23 8 | 453 6 a Winnemucca west of Salt Lake City Not including personal equation, probable error of one night Difference of longi- tude. Corrected time. 171 Means. Double. wave time. hem. 8 17 09 45.81 16 46 25. 17 15 36.90 16 52 16. 17 25 32. 17 02 11. 17 31 37. 17 08 16.29 17 43 19. 17 19 58. 17 47 07. 17 23 46. 23 20. 23 20.76 -| 23 20. 755 -| 23 20. 765 23 20. 690 0h 23m 208,751 = 08.015 + 05.026 Mean places of stars for 1873.0 used for determination of latitude of Winnemucca, Nevada. No. of pair. ae ¥ Bight deren Declination. || No. of pair. He ¥ Bight axcen- Declination. h. m. 8. ae hve! h.m. 8. OF 1 5131 15 27 48 | 31 47 19.92 13 6771 19 39 42 37 02 54. 92 cere 5164 31 26 | 50 07 14.80 nok 6779 41 00 44 49 18.34 9 5915 16 22 27 | 32 58 59.81 14 6810 19 45 36 22 17 19.19 ae ; 5535 26 3 ASEUARNOS 288 |||Sn aaa 5 aa } 6818 46 00 59 05 55. 60 3 6013 17 39 20 | 44 08 26.90 || 15 ; 6830 19 48 23 47 36 17.52 7. ae ; 6082 51 54 | 37 16 06.96 Sage em 6851 51 32 34 44 49 86 4 6162 18 03 39 | 43 26 50.64 16 6868 19 54 19 17 10 15, 48 Ai oe 6193 038 51 | 38 44 20,84 Lat es 6905 20 00 08 64 27 55.40 5 ; 6224 18 13 10 | 64 21 15.20 7 5 6932 20 03 31 61 37 37.32 ‘es 6245 17 17 | 17 45 51.28 ec dr) 6941 05 28 20 45 28. 82 6 6289 18 22 03 | 58 43 39.52 18 6966 20 09 53 25 12 19.36 Ppa) } 6322 27 29 | 23 31 25.08 Tyee } 6976 10 27 56 10 46.56 7 6364 18 35 27 | 40 49 11.90 19 7158 20 34 54 40 07 53.90 et i ; 6404 42 09 | 41 18 23.16 es 7174 37 21 41 15 46.96 8 5 6476 18 51 26; 48 42 05.20 20 7188 20 39 23 24 49 02.94 aie i d 6491 59 12] 32 31 00.00 ao al 7215 42 12 57 07 29.40 g* 6553 19 02 37 | 32 18 11.08 21 ; 7361 21 06 13 22 33 45.16 a eriay ; 6579 08 48 | 49 37 10.80 Foe eae 7377 08 34 59 27 52.84 10 6642 19 18 40 | 16 41 31.54 29 TA17 21 15 45 58 05 12.46 ‘ies 6662 20 01 | 65 28 12.04 teks 7437 18 15 23 43 46. 66 11 6673 19 23 12 | 29 11 34.00 23 7453 21 20 36 36 07 10.34 Pa } 6687 2419 | 52 03 43.60 Spar. g 7469 22 51 45 51 51.76 12 ; 6693, 19 27 03 | 34 11 03.32 2 aS 6721 31 03 | 47 53 20.08 *Mr. Maryatt observed the following component of B. A.C.6579. The Catalogue of 981 Stars gives the preceding. (Bonn Observations, vol. vii, p. 93). The computer has, therefore, added + 7.7 to the declination according to Argelander 72 ASTRONOMY. Observations and computations for latitude. WINNEMUCCA, NEVADA. Level. Corrections. No.of} Microm. |- Half-sum of : Date. | ‘star. | readings. Remarks. | declination. Microm: ; Latitude. N. S spd wales. Level. | Merid. 187 % t. d. d. fo) ’ a ‘ 4M “4 us fo) 1 ul July 15 | 6013 7.173 | 29.2 | 23.0 6082 32. 067 | 22.8 | 29.8 40 42 19.26 |+15 59.60 |—0.19 |..._... 40 58 18. 67 6162 24.895 | 38.7 | 14.0 6193 13. 529 | 15.0 | 37.8 41 05 37.52 |— 7 18.14 |+0.44 |._..... 19, 82 6224 30. 034 | 39.7 | 18.6 . ? 6245 21.652 | 14.0 | 39.8 03 34.30 |— 5 15.41 |-+0.07 |.----- 18. 96 6289 7.697 | 38.3 | 15.7 6322 13. 293 | 19.1 | 35.5 07 33.36 |— 9 15.26 |4-1.43 |______. 19,53 6364 15. 442 | 22.9 | 32.0 6404 24.095 | 44.3 | 11.2 41 03 48.58 |— 5 33.55 [45.56 |_____.. 20. 59 6476 3.117 | 29.6 | 26.6 6491 36. 962 | 28.7 | 27.3 40 36 33.06 |+21 44.65 |+1.02 |..._... 18.73 6553 20. 142 | 26.0 | 30.1 6579 1952223 838.7 || TOOL 40 57 41.23 |4+ 0 35.47 |4+-3.59 | .___.. 20. 29 6642 13. 833 | 31.3 | 26.0 6662 24, 034 | 30.1 | 27.2 41 04 51.24 |— 6 33.24 }41.90 |... 19. 90 6673 34,373 | 25.0 | 32.2 6687 2.178 | 34.1 | 23.2 40 37 38.46 |4+20 41.05 |+-0. 86 |.._... a 20. 37 6698 16. 912 Foi) |) bo) 6721 PRE BY || Sisi7/ |) ZG 41 02 11.26 |— 3 54.48 |+-2.66 | .____.- 19, 44 6771 24, 074 | 26.9 | 30.7 6779 20.698 | 46.7 | 11.1 40 56 05.98 |+ 2 10.91 |+-7.36 |.....-. 24, 25 6810 30. 817 | 27.1 | 30.4 6818 4.903 | 22.0 | 35.7 40 41 38.04 |+16 38.95 |—3. 24 |.____.. 13.75 6830 PEP) ere il |) Bit) 7/ 6851 10. 073 | 28.0 | 29.8 M41 10 32.78 |—12 18.15 |—1.25 |...... 13. 38 6868 95.878 | 30.5 1B 6905 11. 437 | 32.5 | 25.6 40 49 04.24 |+ 9 16.69 |4+2.34 |.__._.. \ 23. 27 6932 | 34.131 | 33.7 | 24.6 | 6941 13.570 | 15.0 | 43.3 41 11 31.85 |—13 12.60 |—4.44 |....... 14.81 6966 31.742 | 29.7 | 28.6 6976 5.621 | 3151) 27.0 40 41 31.63 |+16 46.93 |+1.20 |...-..- 19.7 7158 32. 364 | 26.8 | 31.5 ' I 7174 6. 691 | 36.2 | 22.3 41 48.56 |+16 29.63 |+2.13 |....... 20. 32 7188 19. 107 | 27.0} 31.8 H 7215 19. 060 | 38.7 | 20.1 40 58 14.17 |+ 0 01.81 |+-0.88 |.......- 16. 86 | 7361 16. 853 | 22.0 | 32.1 7377 20.789 | 52.0 6.3 41 00 46.65 |— 2 31.75 +8. 47 |...--.- 40 58 23. 39 Observations and computations—Continued. LATITUDE DETERMINATIONS. WINNEMUCCA, NEVADA. 173 Level. Corrections. : No.of| Microm. % Half-sum of F Date. | star, readings. Remarks. | declination. Micron f Latitude. N. S. aiens Level. | Merid. 1873. t. d. d. o 7 “ v] “ u "1 o 7 “ July 15 | 7417 15. 920 | 32.9 | 26.3 7437 21.912 | 22.9 | 36.3 40 54 26.24 |+ 3 50.99 |—1.57 |..---.- 40 58 15. 66 7453 19,778 | 26.7 | 32.7 7469 21.656 | 41.4 | 17.7 59 28.34 |— 1 12.40 |+4.10 |...--.- 20. 04 July 16 | 6642 13.500 | 23.7 | 24.0 6662 23. 661 | 24.2 | 23.3 41 04 51.50 |— 6 27.84 |40.09 |..--.-- 23.75 6673 34, 068 | 22.0 | 25.8 6687 2. 656 | 32.9 | 15.0 40 37 38.76 |+20 41.71 |+3. 26 |..----- 23.73 6698 17.094 | 20.6 | 27.2 6721 23. 152 | 36.0 | 11.9 41 02 11.56 |— 3 53.52 |+-4. 05 |..--..- 22. 09 6771 23, 923 | 21.8 | 26.1 6779 20.502 | 34.4 | 13.6 40 56 06.29 |+ 2 11.88 |+3. 82 |...--..- 21.99 6810 32. 083 | 22.0 | 26.1 6818 Gx9525| 01257) 135.5 41 38.34 |+16 47.31 |—6.23 |+0.19 19. 61 6868 25. 982 | 25.7 | 22.9 6905 11. 480 | 14.9 | 34.0 40 49 04.52 |+ 9 19.04 |—3.77 |+0. 04 19. 83 6932 | 34.685 | 25.3 | 23.5 6941 14, 207 | 12.2 | 36.7 41 11 32,15 |—13 09.40 |—5. 26 |...-..- 17.49 6966 31.498 | 24.5 | 24.6 6976 5.269) 1525 | 33.6 40 41 31.94 |+16 51.08 |—4. 21 ae 18. 81 7158 34. 428 | 20.1 | 29.7 7174 8.646 | 31.1 | 19.0 41 48.89 |+16 33.83 |+0.58 |...---- 23. 30 7188 18. 996 | 23.3 | 27.1 7215 18.752 | 19.6 | 31.0 40 58 14.49 |+ 0 09.40 |—3.52 |--0. 08 20. 45 7381 15. 656 | 23.9 | 27.0 7377 19. 307 | 11.9 | 39.1 41 00 46.96 |— 2 20.74 |—7.01 |.------ 19. 21 7417 16. 697 | 29.5 | 21.8 7437 22.882 | 4.7 | 46.7 40 54 26.51 |4+ 3 58,42 |—7.94 |...--.. 16.99 7453 19.171 | 24.5 | 26.8 7469 20. 873 | 22.0 | 29.3 40 59 28.66 |— 1 05.61 |—2. 22 |.----- 4 20. 83 July 18 | 6642 14. 065 | 22.0 | 31.5 6662 24, 282 | 32.5 | 21.0 41 04 52.17 |— 6 33.85 |+0. 46 |..----- 18.78 ‘| 6673 34, 237 | 27.8 | 25.7 6687 2.170 | 22.7 | 31.0 40 37 39.35 |+20 36.12 |—1. 44 |....-.- 14. 03 6698 | _ 1&.908 | 27.8 | 26.3 721 24, 957 | 33.8 | 20.0 41 02 12.16 |— 3 53.17 |-+3.54 |..--- 22.53 6771 25. 978 | 26.0 | 27.3 779 22. 425 | 34.3 | 19.1 40 56 06.90 I+ 2 16.96 |+3. 22 |..---.- 40 58 27. 08 174 ASTRONOMY. Observations and computations—Continued. WINNEMUCCA, NEVADA. Corrections. No.of} Microm. ; Half-sum of : Date. | star. readings. Remarks. | geclination. Miorom: | Latitude. and refr. Level. 187 ee i i of u" 1 “ “ July 19 | 6162} 24.101 | 24.2 | 21.3 6193 12.753 | 19.0 | 26.3 41 05 38.56 |— 7 17.44 |—1. 02 6224 295139) S958.) (os 6245 21.039 | 6.1 | 38.6 03 35.27 |— 5 12.25 |-+0. 49 62e9 27.963 | 42.3 | 2.1 6322 13.537 | 3.3 | 40.9 41 07 34.40 |— 9 16.10 |+0. 66 6673 34,195 | 17.8 | 27.1 6687 2. 033 Sai) | a 40 37 39.65 |4+20 39.78 |+2.75 6698 16. 318 | 23.2 | 21.3 6721 22. 320 | 19.7 | 25.0 41 02 12.46 |— 3 51.36 |—0.79 677 PSR ayy | IBY || PA 6779 20.174 | 25.7 | 19.1 40 56 07.21 |+ 2 10.21 |—0.7% 6810 30, 955 | 26.0 | 18.8 6818 4.965 | 25.7 | 19.1 40 41 39.22 |+16 41.88 |-+-3.20 6830 28, 322 | 26.1 | 18.4 6851 9.273 | 15.8 | 28.3 41 10 34.03 |—12 14.30 |—1.11 6868 26. 433 | 20.3 | 23.4 - 6905 12, 206 | 53.0 |—9. 40 49 05.39 |+ 9 08.45 |+-9.31 6932 30. 877 | 25.3 | 18.5 6941 9.267 | 23.6 | 20.2 41 11 33.05 |—13 14.49 |+2.36 6966 31.543 | 21.5 | £2.0 7 6976 5.544 | 18.7 | 24.8 40 41 32.84 |416 42.22 —1.53 July 21 | 6162 25.196 | 22.7 | 24.7 6163 13. 758 | 30.3 | 17.0 41 05 39.06 |— 7 20.91 |+2. 62 6224 28. 267 | 23.7 | 23.4 6245 20.003 | 29.1 | 18.0 03 35.74 |— 5 18.57 |+2.64 6289 26.989 | 27.9 | 19.1 6322 12.573 | 18.0 | 28.7 41 07 34.90 |— 9 16.10 |—0. 21 July 23 | 6013 5. 622 | 19.3 | 29.1 6082 30.551 | 27.0 | 22.0 40 42 21.16 |4+16 00.95 |—1.11 6162 | °24. 463 | 26.9 | 23.7 ; 6193 13.100 | 19.0 | 32.2 41 05 39.55 |— 7 18.02 |—2. 32 6224 28.313 | 22.9 | 29.0 6245 20.150 | 25.1 | 26.9 03 36.20 |— 5 14.67 |—1.83 6289 26.125 | 27.0 | 25.6 6322 11.737 | 16.7 | 36.3 07 35.40 | 9 14.64 |—4. 21 6364 14, 454 | 26.5 | 26.9 5 6404 23.011 | 24. 29.0} 41 03 50.64 - 5 29.85 |-1.13 LATITUDE DETERMINATIONS. yg Observations and computations—Continued. WINNEMUCCA, NEVADA. Level. Corvections. Microm. Half-sum of . Date. readings. Remarks. eclnaion OS Latitude. N. NS} and vofr. Level. | Merid. 1873. “A, d. d. (o) ‘ “ i “ 4“ “ Or ff “a July 23 | 6476 2.684 | 27.0 | 27.1 6491 36.585 | 19.0 | 35.3 40 36 35.30 |+21 46.81 |—3.80 |.----.. 40 5818. 31 6553 19. 952 | 23.4 | 31.1 6579 18. 984 | 20.0 | 35.1 40 57 43.55 |4+ 0 37.32 |—5. 28 |.------ 15.59 6642 14, 062 | 25.2 | 30.4 6662 24.215 | 30.0 | 25.7 41 04 53.52 |— 6 33.70 |—0. 21 |.------ 19. 61 6673 34.819 | 23.8 | 32.0 6687 2.666 | 29.0 | 27.0 40 37 40.80 |+20 39.43 |—1. 44 |.------ 18.79 6698 16. 462 | 22.1 | 33.7 6721 22.498 | 32.2 | 23.8 41 02 13.65 |— 3 52.67 |—0.74 |..----- 20. 24 6771 23.969 | 24.8 | 31.3 6779 20. 546 | 30.3 | 26.0 40 56 08, 42 |+ 2 11.95 |—0.51 |.----.- 19. 86 6810 31. 626 | 26.7 | 29.8 6818 5. 693 | 27.0 | 29.7 40 41 40.38 |+16 39.68 |—1. 34 |--0. 05 18.75 6830 29.080 | 30.4 | 26.0 6851 9.991 | 13.2 | 43.6 41 10 35.26 |—12 15.84 |—4.77 |..---.- 14. 65 6868 | 27.203 | 27.1 | 29.9 6905 12. 800 | 25.5 | 31.8 40 49 06.58 |+ 9 15.23 |-2.11 |------- 19. 65 6932 31.239 | 32.3 | 25.1 6941 10. 669 | 45.2 | 12.2 41 11 34.22 |—13 12.95 |+-9. 31 |.------ 30.58 6966 Siler yé |) See ists} 6976 5.010 | 20.2 | 37.3 40 41 34.06 |+16 47.92 |—3.52 |.------ 18. 46 7158 32. 616 | 28.0 | 31.5 7174 6.968 | 44.3 | 15.1 40 41 51.12 |+16 28. 67 |+5.95 |.----.- 25.74 7188 18. 801 | 25.0 | 34.5 7215 18.708 | 44.7 | 14.5 40 58 16.65 |-+ 0 08.58 |+-4.79 |.----.- 25. 02 7361 15.617 | 26.2 | 33.4 7377 19, 495 | 32.0 | 27.7 41 00 49.12 |— 2 29.49 |—0. 67 |+0.13 19. 09 7417 15.906 | 29.6 | 30.2 7437 21.895 | 31.3 | 28.4 40 54 28,44 |+ 3 50.87 |+0.53 |.------ 19. 84 7453 | 18.627 | 26.8 | 33.2 7469 20. 468 | 36.3 | 23.8 40 59 30.92 |— 1 10.97 |+1. 41 |.----. - 21.36 July 24 | 6364 15. 033. | 23.8 | 27.0 6404 23. 600 | 25.7 | 25.5 41 03 50.90 |— 5 30.23 |—0. 69 |..-.-.- 19. 98 6476 |. 2.384 | 28.6 | 23.0 6491 36. 262 | 15.0 | 36.8 40 36 35.58 |4-21 45.92 |—3.75 |------- ARE 6553 20.250 | 27.0 | 25.4 . 6579 19, 253 | 21.4 | 31.5 40 57 43.83 J+ 0 38.43 |—1.97 |.----. -140 58 20. 29 176 ASTRONOMY. Observations and computations—Continued. WINNEMUCCA, NEVADA. Level. No.of} Microm. 2 Half-sum of Date. star. | readings. Remarks. declination. N. Ss. 1873. t. d. d. Oe cts July 24 | 6642 12. 938 | 23.5 | 29.2 6662 23. 124 | 26.8 | 26.1 41 04 53.78 6673 34. 844 | 2.6 | 29.8 6687 2.670 | 29.7 | 22.8 40 37 41.09 6698 16. 874 | 21.9 | 30.0 6721 22. 899 | 27.2 | 24.5 41 02 13.94 6771 23.744 | 24.2 | 27.0 6779 20. 323 | 32.3 | 19.1 49 56 08.72 6810 30. 880 | 23.9 | 27.2 6818 4.922 | 25.9 | 25.0 40 41 40, 67 6830 28.775 | 23.5 | 27.2 6851 9.691 | 23.9 | 27.0 41 10 35.56 6868 26.517 | 20.6 | 30.0 6905 12.111 | 25.3 | 26.0 40 49 06. 81 6932 30. 212 | 27.2 | 24.2 6941 9.626 | 18.1 | 33.4 41 11 34.52 6966 31.532 | 21.9 | 29.8 6976 5. 432 | 34.5 | 17.2 40 41 34.36 7158 33. 183 | 25.9 | 25.4 7174 7.466 | 41.3 | 10.6 40 41 51,44 7188 18.611 | 26.2 | 25.0 7215 18. 467 | 22.2 | 29.3 40 58 16.96 July 25 | 6553 20.573 | 24.8 | 27.3 6579 19. 625 | 29.6 | 22.0 40 57 44.11 6642 14. 000 | 23.8 | 26.9 6662 24,217 | 24.6 | 23.0 41 04 54.05 6673 33. 982 | 27.0 | 23.0 6687 1. 827 | 20.0 | 29.8 40 37 41.37 6698 17.173 | 26.0 | 23.3 6721 23.197 | 22.1 | 27.0 41 02 14. 24 6771 23.940 | 22.3 | 26.0 6779 20.545 | 29.3 | 19.1 40 56 09. 02 6810 33. 107 | 24.5 | 24.2 6818 717 |).22.3) | 26.5 40 41 40.96 6830 29. 072 | 21.1 | 27.8 6851 9.949 | 17.9 | 31.2 41 10 35. 86 6868 26.105 | 25.0 | 24.0 6905 11.749 | 23.3 | 26.6 40 49 07.10 Corrections. “3 Latitude. mack Level. | Merid. i (0 u u JG th — 6 32.66 |—1.16 |..--... 40 58 19. 96 +20 40.24 |—0.07 |..---. : 21. 26 — 3 52.25 |—1. 25 |.----- 20. 44 + 2 11.88 |+2.41 |......- 23. 01 +16 40.65 |—0.56 |...-..-. 20. 76 —12 15.65 |—1. 57 |...-.-.- 18. 34 + 9 15.35 |—2. 34 |._..... 19. 82 —13 13.56 |—2. 85 |.----. 18.11 +16 46.11 |+2.18 }...-..- 22. 65 +16 31.33 |+7. 22 |..---.- 29. 99 +- 0 05.55 |—1. 37 |.----.- 21.14 + 0 36.54 |-1.18 }......-. 21. 83 — 6 33.85 |—1. 04 |.....-- 19. 16 +20 39.51 |—1. 34 |......- 19.54 — 3 52.21 |—0.51 |}...-..- 21. 52 + 2 10.57 |4+1.50 |.----.- 21.39 +16 39.80 |—0.90 |..-...- 19. 86 —12 17.15 |—4. 63 |-++0. 16 14, 24 + 9 13.42 I—0.51 [..-... -|40 58 20. 01 LATITUDE DETERMINATIONS. IE TAT/ Observations and computations—Continued. WINNEMUCCA, NEVADA. Level. Corrections. No.of} Microm. Half-sum of * Date. | star. readings. Remarks. declination. Mierom Latitude. 2 Ss. aa ad Level. | Merid. 1873. i d. d. OF a i “ “ (oy “ July 25 | 6932 31.123 | 28.5 | 21.9 6941 10.520 | 17.3 | 33.2 41 11 34,81 |—13 14,22 |—2.15 |.-.-..- 40 58 18. 44 6966 31. 827 | 17.9 | 32.9 6976 Rp 7PAl \eieay |) Gh al 40 41 34.66 |+16 46.34 |—0.56 |..---. - 20, 44 7158 32. 860 } 22.1 | 28.9 7174 7.150 | 23.0 | 28.0 40 41 51.76 |+16 31.06 |—2.73 |.-.--.- 20. 09 7188 18. 622 | 24.3 | 26.3 7215 18.503 | 22.8 | 28.0 40 58 17.27 |+ 0 04.59 |--1. 67 |.-.----- 20.19 7361 16. 603 | 23.3 | 27.8 7377 20.510 | 25.0 | 26.5 41 00 49.74 |— 2 30.61 |—1.39 |--0. 10 17.84 7417 15. 807 | 25.7 | 26.3 7437 21. 834 | 18.0 | 34.0 40 54 29.00 |+ 3 52.34 | 3.84 |.------ 17.50 7453 19. 722 | 23.1 | 29.0 7469 21.540 | 39.9 | 12.6 40 59 31.56 |— 1 10.08 |4+4.95 |...--..- 26. 43 July 26 | 6553 19.945 | 22.8 | 27.0 6579 19,041 | 41.2] 9.1 40 57 44,39 |+ 0 34.85 |+6, 46 |..----- 25.70 - 6642 14, 467 | 19.0 | 31.6 6662 24.606 | 23.5 | 27.0 41 04 54.31 |— 6 30.85 |—3.73 |.------ 19.73 6673 | 34.340 | 25.2 | 27.2 6687 PRILAL || SPRITE |) Weh@ 40 37 41.65 |+20 41.98 |4+2.20 |...---.- 25. 83 6698 17. 226 | 24.0 | 26.0 6721 23.136 | 16.0 | 34.7 41 02 14.53 |— 3 47.82 |—4.93 |..---.- Pal set 771 93. 441 | 29.7 | 20.0 6779 20.010 | 18.2 | 31.2 40 56 09.31 |+ 2 12.26 |—0.76 |.----.- 20. 81 6810 31.358 | 19.0 | 30.1 6818 5,397 | 26.8 | 22.5 40 41 41.24 |+16 40.76 |—1.57 |.-.---.- 20. 43 6830 29. 032 | 30.2 | 19.1 6851 9,949 | 15,2 | 33.2 41 10 36.16 |—12 15.61 |-1.60 |.-..-.-.- 18. 95 6868 26.403 | 17.5 | 32.0 6905 12.012 | 31.0 | 18.9 40 49 07.38 |4+ 9 14.77 |—0.56 |..--..- 21559 6932 30. 942 | 23.4 | 26.7 : 6941 10. 122 | 25.5 | 24.6 41 11 35.20 |—13 22.58 |—0.56 |.---..- 11. 96 6966 32. 960 | 20.3 | 29.7 6976 6, 822 | 20,1 | 30.0 40 41 34.96 |4+-16 47.57 |—4. 47 |.------ 18. 06 7158 34.118 | 24.0 | 25.9 7174- 8.473 | 38.6 | 11.4 40 41 52.08 |-+16 28.55 |+-5. 86 |.------ 26. 49 71s8| 18.922 | 28.9 | 26.1 i 7215 18. 821 | 28.9 | 22.0 40 58 17.57 I+ 0 03.89 I4-1.09 }..-...- 40 58 22.55 12 AST 178 Observations and computations—Continued. ASTRONOMY. WINNEMUCCA, NEVADA. Level. No.of] Microm. ce Half-sum of TENG star. | readings. Remarks. declination. N. Ss. 1878. t. d. d. Sr ad a July 26 | 7361 17.371 | 22.5 | 26.9 7377 21.247 | 26.9 | 22.6 41 CO 50.05 7417 15, 212 | 24.0 | 25.5 7437 21.794 | 22.4 | 26.1 40 54 29.28 7453 19.161 | 23.3 | 26.2 7469 21.076 | 26.9 | 22.8 40 59 31.88 July 27 | 6162 24.480 | 30.1 | 19.0 6193 nS) ie 2 eo i a) 41 05 40.51 6224 29.457 | 31.2 | 19.0 6245 21.231 | 19.0 | 31.7 41 03 37.10 6289 27.683 | 27.2 | 23.1 6322 13. 232 | 22.0 | 30.0 41 07 36.36 6932 29, 927 | 30.2 | 23.8 6941 9, 282 | 25.0 | 28.6 41 11 35.38 6966 32, 2BY || Base || 6976 6.191 | 30.0 | 23.0 40 41 35.26 July 28 | 6162 24,809 | 26.7 | 23.4 6193 13. 349 | 19.0 | 31.0 41 05 40.74 6224 | 28.937 | 30.4 | 20.1 6245 20. 688 |} 21.9 | 29.0 41 05 37.31 6289 29, 326 | 28.7 | 21.9 6322 14. 860 | 26.1 | 24.6 41 07 36.59 6364 15. 351 | 31.0 | 30.0 6404 BaN9G Wa tazre | onU, 41 03 51.96 6476 2.801 | 27.8 | 24.3 6491 36. 612 | 25.0 | 27.1 40 36 36.64 6553 19.770 | 23.0 | 29.8 6579 18. 846 | 30.0 | 23.6 40 57 44.93 6642 18.702 | 23.9 | 30.2 6662 24.028 | 45.0] 9.0 41 04 54.82 6673 34. 628 | 23.9 | 30.2 6687 2.550 | 40.1 | 13.9 40 37 42.21 6698 16.704 | 27.0 | 26.9 6721 22.805 | 31.5 | 22.5 41 02 15,12 6771 24.413 |} 23.9 | 30.8 6779 21,132 | 32.9 | 22.0 40 £6 09.90 6810 31.510 | 23.6 | 31.4 6818 5, 654 | 36.1 | 19.0 40 41 41.80 Corrections. : Latitude. Micron Level. | Merid. ‘ “ “ua a“ oO ff a — 2 29.42 |—0. 02 |..--... 40 58 20. 61 + 3 58.31 |—1.20 |....... 26. 39 — 1 13.82 |+-0. 28 |.....-.- 18. 34 — 7 21.29 |—2.01 |..-...- 17.21 5 17210) | =02 12) | - = 19. 88 — 9 17.07 |—0.90 |..---.- 18. 39 —13 15.84 |+0.65 |......- 20. 19 +16 44.03 |41.27 |....... 20. 56 — 7 21.76 |—2. 01 |...-.-.- 16. 97 r= ® Ure Si) RU Ze! |lecaee 20. 06 — 9 17.65 |+-1.92 |..--.-- 20. 86 — 5 32.12 |+-3.29 |..---.. 23.13 +21 43,34 |4+0.33 |.-..--- 20. 31 + 0 35.62 |—0.12 |...--. -| 20. 43 — 6 38.05 |+6.88 |....... 23. 65 +20 36.54 |+-4.61 |....-.- 23. 36 — 3 55.18 |+2.11 |...-..- 22.05 + 2 05.48 |+0. 93 |....-.-. 17. 31 +16 36.71 |+2.15 |--0.05 '40 58 20,71 LATITUDE DETERMINATIONS, WINNEMUCCA, NEVADA. Observations and computations—Continued. No. of | Microm. Date. | tar. readings. 1873. t. July 28 | 6830 29. 377 6851 10. 284 6868 27, 022 6905 12. 693 6932 30.770 6941 10. 101 6966 32, 522 6976 6. 464 7158 33. 314 7174 7.683 7188 18. 400 7215 18. 331 7361 16. 587 7377 20. 486 7417 16. 930 7437 22. 900 7453 19. 166 7469 21. 000 July 29 | 5131 20. 521 5164 20. 393 5915 12. 280 5535 25. 417 6013 5. 887 6082 30. 702 6162 24, 416 6193 12. 948 6224 28, 417 6245 20. 137 6289 27. 263 6322 12. 772 6364 15. 710 6404 24. 328 6476 3.543 6491 37. 301 6553 20. 857 6579 19. 953 6642 13. 541 6662 23. 823 Level. wm ees Se ¥YNsg oe OW ea” wo we ww CSD SEY = Ste BPO WO MD HO wr ~ a ot) “ww ww cere BS 2929 ae) 09 hS Sr HO SCS 8O OH wry WHY We Gee fey Remarks. 179 Corrections. declination. Microm. Level. | Merid. peel and reff. fey ot a“ ‘ “ “ “ of a“ 41 10 36.76 |—12 15.99 |—4.54 ]....... 40 58 16. 23 40 49 07.94 |+ 9 12.38 |41.76 |..__... 22. 08 41 11 35.67 |—13 16.76 |—0. 65 |.-....- 18. 26 40 41 35.56 |4-16 44.49 |—0.12 | __-.. 19. 93 40 41 52.71 |4+16 28.01 |4+-3.75 |...-..- 24, 47 40 58 18.18 |+ 0 02.66 |—0.14 ]..... 20. 70 41 00 50.66 |— 2 30.30 |—0. 07 |....... 20.29 40 54 29.85 J+ 3 50.14 |-0.66 |......- 19. 33 40 59 32.53 |— 1 10.70 |—0.56 |....-. 58 21. 27 40 57 24.50 |+ 0 04.93 |—0.09 |....... 57 29, 34 41 06 46,16 |~ 8 26,41 |+0.93 |+0.21 58 20. 89 40 42 22.47 |4+-15 56.56 |—0. 37 |...-... 18. 66 41 05 40.97 |— 7 22.07 |-+0.23 |....... 19.13 41 08 37.52 (— 5 19.18 |—1.92 |......- 16, 42 41 07 36.82 |— 9 18.61 |+1.27 |+0.01 19, 49 41 03 52.20 |— 5 32.20 |+-5, 40 |..---.. 25. 40 40 36 36,90 |4+21 41.30 |+-0.21 |--0.08 18. 49 40 57 45.21 |4+ 0 34.85 |+-5.56 |...-... 25. 62 41 04 55.08 |— 6 36.36 |+1.23 |....... 40 58 19. 95 180 ASTRONOMY. Observations and computations—Continued. WINNEMUCCA, NEVADA. Level. Corrections. No.of] Microm. is Half-sum of a Date. | ‘star. readings. Remarks. | declination. Minera ; Latitade. N. Ss. Sal Dae. Level. | Merid. 1873. t. d. d. [o} i “a a “l “l a“ roy Ff a“ July 29 | 6673 34.570 | 27.0 | 27.1 6687 2.500 | 29.8 | 24.6 40 37 48.48 |+20 36.24 |4 1.18)....... 405819 90 6698 16.398 | 25.3 | 28.6 6721 22.476 | 25.0 | 29.3 41 02 15.40 |— 3 54.29 |— 1.76|..---.- 19.35 6771 21. 865 | 25.9 | 29.8 6779 18. 526 | 33.0 | 22.7 40 56 10.19 | 2 08.71 |4 1.4e)..----. 20. 38 6810 31.066 | 26.2 | 29.7 6818 5.196 | 29.9 | 26.2 40 41 42.08 |+16 37.25 |+ 0.05)/-+-0. 02 19. 40 6830 29.396 | 32.9 | 23.2 6851 10. 220 | 26.7 | 29.8 41 10 37.05 |—12 19.19 |+ 1.53).------ 19. 39 6868 PoRebS ean en| tool 6905 11.538 | 42.0 | 15.0 40 49 08.21 |-+ 9 12.03 |+ 3.98) ----.- 24, 20 6932 30. 402 | 32.2 | 25.0 6941 9.741 | 25.0 | 32.3 41 11 35.96 |—13 16.45 |— 0. 02)..---.- 19, 49 6966 32.006 | 26.0 | 31.3 6976 5. 990 || 38.3 | 19.1 40 41 35.86 |+16 42.87 |+ 3.22/40. 21 22.16 July 30 | 6013 5.883 | 38.4 | 14.9 6082 30.720 | 37.9 | 16.1 40 42 22.6€ |4+15 57.40 |4+-11.64). __-.- 31.72 6162 23.935 | 25.9 | 25.0 6193 12.501 | 29.8 | 24.0 41 05 41.20 |— 7 20.76 |+ 0.86) ----.. 21.30 6224 28.672 | 35.9 | 17.9 6245 20.410 | 9.0 | 44.7 41 03 37.74 |— 5 18.49 |— 4. 10).---- 15. 15 6289 27. 622 | 26.0 | 27.8 6322 13. 150 | 28.0 | 25.9 41 07 37.05 |— 9 17.88 |+ 0.07|..----. 19. 24 6364 15.138 | 27.0 | 27.0 6404 23.752 | 26.3 | 28.0 41 03 52.46 Jj— 5 32.05 |— 0.39)..---.- 20. 02 6476 2.927 | 26.0 | 29.1 6491 36. 732 | 22:0 | 33.3 40 36 37.16 |4+21 43.11 |— 3.32)....--- 16. 95 6553 20. 437 | 23.8 | 32.1 6579 19, 535 | 32.9 | 23.6 40 57 45.47 |+ 0 34.77 |+ 0.23] ..-.-.- 20. 47 6642 12. 398 | 21.2 | 35.6 6662 22. 674 | 45.6 | 11.3 41 04 55.34 |— 6 36.18 |+ 4.61).----..- 23. 82 6673 34.509 | 27.0 | 30.0 6687 2.470 | 52.5 | 4.0 40 37 42.76 |-+20 35.04 |4+-10. 53)...--.. 28. 33 6698 16, 550 7.9 | 29.1 6721 22.658 | 38.1 | 19.0 41 02 15.70 |— 3 55.45 |4+ 4.14)......- 24.39 6810 32.188 | 24.6 | 33.3 6813 | 6. 333 | 44.2 | 14,0 40 41 42.36 !4+16 36.68 '+ 4. 98-40. 06 |40 58 24. 08 LATITUDE DETERMINATIONS. 181 Observations and computations—Continued. WINNEMUCCA, NEVADA. Level. Corrections. No.of} Microm. amanie | Half-sum of ee z Date. | cra, readings. Remarks. declination.| yrorom Latitude. N. S and teri Level. | Merid. 1873. 1. d. ad. fo} / “ / “a “ ut fo) a “a July 30 | 6830 28. 624 | 32:0 | 26.1 6851 9, 478 | 23.9 | 34.2 41 10 37.34 |—12 18.04 |+1. 02 |.-..---. 40 58 20. 33 6868 26. 973 | 26.9 | 30.8 6905 12. 663 | 33.9 | 23.7 40 49 08,49 |-+ 9 11.64 |41.46 |..---.- 21.59 6932 30.906 | 30.3 | 27.0 6941 10. 225 | 27.7 | 29.3 41 11 36.24 |—13 17.22 |—0.39 |...-.. 18. 63 6966 31.768 | 25.8 | 31.1 6976 5. 767 | 34.1 | 22.9 40 41 36.16 |4+16 42.29 |41.37 |.----.- 40 58 19, 82 Discussion of latitude of Winnemucca, Nevada. H i] OH| oa Corr. of F 3 SF g S ne Latitude. | microm. ee Dates excluded. eleee| ice evel. Gara. atitude. Ae°|ae SS u" ov “ " (oval) u" 1 1 | — 0.1 | 40 57 32.34 0.00 | 40 57 32.34 2 1) + 0.9 58 20.89 | -+ 0.38 58) 21.27, 3 3} — 0.6 19.44 | — 0.72 18.72 | July 30. 4 8}— 0.4 19.31 | + 0.33 19. 64 5 7 0.0 19.78 | + 0.24 20.02 | July 30. 6 7/+ 0.5 19.15 | + 0.42 19.57 | July 23. 7 4/+ 0.3 20.70 | + 0.25 20.95 | July 15, 29. 8 6|— 1.5 18. 42 | — 0.98 17.44 9 6] + 0.3 20.54 | — 0.03 20.51 | July 23, 26, 29. 10 8 | — 0.2 20.11 | + 0.29 20. 40 | July 28, 30. il 9) + 0.7 20.63 | — 0.93 19.70 | July 28, 30. 12 8} + 0.4 20.74 | + 0.18 20.92 | July 16, 26, 30. 13 9} +1.3 20.95 | — 0.10 20.85 | July 15. 14 8} — 0.3 19.74 | — 0.75 18.99 | July 16, 30. 15 6|— 0.5 18.17 | + 0.55 18.72 | July 23, 25, 28. 16 9 0.0 21.34 | — 0.41 20.93 | July 19. 3 17 8} — 0.5 18.25 | + 0.59 18. 84 | July 15, 16, 23. 18 9)/+ 0.4 19.65 | — 0.76 18.89 | July 16, 26. 19 4|/+ 0.9 22.04 | — 0.74 21.30 | July 23, 24, 26. 20 6 | — 0.8 21.98 0. 00 21.98 | July 23. 21 4|— 0.5 19.46 | + 0.11 19.57 | July 15, 16. 22 5|—1.3 19,34 | — 0.18 19.16 | July 16. 23 4|— 0.2 20.45 | + 0.05 20.50 | July 15, 25. Mean of 22 pairs, excluding pair 1 -.----.-.--- 40° 58! 19’.97 Sumo herrors)-ee secs eae see aeons aoa 20.39 Probable error of 1 pair -.----- ---.---..----- as (etl Probable error of result .... .----.-.--------- Se (Maly Omitting level corrections entirely : Approximate mean of 22 pairs ..-....-------- 40° 58’ 20/.02 SUM Omentorseeereseeessesasseae Seeaes cos—> 15'.6 Probable error of tipait) s------2\---2e6 --- se + 0.62 Probableerror of result .-=.-2-s-s--<--4= <=-- + 0.14 182 ASTRONOMY. Excluded pairs at Winnemucca, Nevada. Sh. on. $A aes Result with | Result with- | & EES Result with | Result with- | ¢ 2-2 Date. | level-correc- | out level-cor- | & 5 3 Date. | level-correc- | out level-cor-| 55 8 sf tion. rection. oes s tion. rection. 258 = & FS is a 3 ou “ oy) 4 “ u“ ey v u of “ u“ 3 | July30} 40 58 31.72 | 40 58 20.08 |— 0.72 || 15 | July23] 40 58 14.65 | 40 58 19.42} + 0.55 5 | July 30 15,15 19.25 |4+ 0.24 July 25 14,24 18.87 | + 0.55 6 | July 23 16. 55 20.76 |+ 0.42 July 28 16. 2 20.77 | + 0.55 7 | July 15 20.59 15.93 | 0.25 |} 16 | July 19 23.15 13.84 | — 0.41 July 29 25. 40 20.00 |+ 0.25 || 17 | July 15 14. 81 19.25 | + 0.59 9 | July 23 15. 59 10.87 |— 0.03 July 16 17.49 22.75 | + 0.59 July 26 25.70 19, 24 |— 0.03 July 23 30. 58 21.27 | + 0.59 July 29 25. 62 20.06 |— 0.03 |} 18 | July 16 18. 81 23.02 | — 0.76 10 | July 28 23. 65 21.77 |-+ 0.29 July 26 18, 06 22.53 | — 0.76 ouly 30 23. 82 19,21 |+ 0.29 || 19 | July 23 25. 74 19.79 | — 0.74 11 | July 28 23. 36 18.75 |— 0.93 July 24 29. 99 22.77 | — 0.74 July 30 28. 33 17.80 |— 0.93 July 26 26. 49 20.63 | — 0.74 12 | July 16 22. 09 18.04 |+ 0.18 |} 20 | July 53 25. 02 20. 23 0. 00 July 26 21.78 26.71 |-+ 0.18 |] 21 | July 15 23. 39 14.92 | + 0.11 July 30 24. 39 20.25 |4+ 0.18 July 16 19. 21 26.22 | + 0.11 13 | July 15 24, 25 16.89 |— 0.10 |} 22 | July 16 16. 99 24.93 | — 0.18 14 | July 16 19. 61 25. 84 |— 0.75 || 23 | July 15 24.04 19.94 | + 0.05 July 30} 40 58 24.08} 40 58 19.10 |— 0.75 July 25] 40 58 26.43] 40 58 21.48 | + 0.05 REMARKS. Mean of results with level correction of 36 observations 40° 58 217.82 Damo errors! Ase seo. cece Ceuc eece che mace mee Dame eee eee ee ee ene 142/78 iProbableterroriofione observation = ses osee en cee eee eee oe ee eee een zt 3.40 iProbablexerroriofsresnl te soso s oo sec nee ce Oe Sr oe oe +t 0'.57 Mean of results without level correction of 36 observations ...-.-.--- 40° 58’ 20.02 DSUMUOF OLrOrs' soem com ac Se sees acc Seto a re oes ee eee ee ee oe 83/4 iProbablejerroriofone observation! =-2=-7- eae eee eee een eee =E 1/99 Probableerrorofsres altar - ojos sacs Seo ee ee ee ee eae + 0.33 Mean of results, including correction to micrometer-correction ..---- 40° 58/ 19 95 Sumyofierrorscs sea: os hee res ate aoe oe ne ee ees Seinen Probable error of one observation Probable:erroriofsresult.2 scones eee eee eee Rg RSCeom QS ese oSS + ASTRONOMICAL CO-ORDINATES OF WINNEMUCCA, NEVADA. Longitude.. 7° 50™ 55°.611 + 08.015 or 117° 43/54/16 + 0”.22 west from Greenwich. 22 49™ 438.491 or 40° 40! 52/36 west from U. S. Naval Observatory, Wash- ington, D. C. Latitude........c..0--.eeeeeee eee 400 58! 19.97 + 0.17 north. U. S. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN, ist Lirut. GEO. M. WHEELER, Corrs or ENGINEERS, U. S. ARMY, IN CHARGE. RESULTS OF OBSERVATIONS MADE BY W. W. MARYATT AND JOHN H. CLARK IN THE DETERMINATION OF THE ASTRONOMICAL CO-ORDINATES OF STATION AT VIRGINIA CITY, NEVADA. SEASON OF 1873. COMPUTATIONS BY Pror. T. H. SAFFORD anp JOHN H. CLARK. 183 VIRGINIA CITY, NEVADA. GEOGRAPHICAL POSITION OF STATION. Longitude, . 119° 39/ 06.35 + 0.36 west from Greenwich. Longitude, 42° 36/ 04.55 west from U. S. Naval Observatory, Washington, Latitude, .. 39° 17! 35.92 + 0”.10 Bed Barometric altitude of observatory above sea-level, 6,339.0 feet. The monument at this station is located on a prominent hill near the main road which connects Gold Hill and Virginia City, and in full view of both of these places. It is connected by triangulation with eight of the principal mountain peaks in the vicinity, and also to the stone monument on Mount Butler, and the flag-staff on Mount Davidson. Direct measure- ments have been made from it to the center of the air-shaft of the Imperial mine, which is 544.1 feet distant, and also to two prominent rocks near by. The first of these is 399.8 feet from the center of the monument in a direction north 48° 47’ east; the other is south 21° west, and 79 feet away. On account of the inconvenient conformation of the surrounding country, neither the north nor south meridian-mark could be established, but a due east line was found and marked. METEOROLOGY——-EXCHANGES—MISCELLANEOUS. The weather was very good, and favorable for astronomical observa- tions. An hourly meteorological record was kept, the results of which will be found in the report on meteorology. | Exchanges were made with Salt Lake City, John H. Clark, observer, on the-nights of August 15, 18, 20, 25, 27, and 28. The observations for latitude were made by W. W. Maryatt on August 13, 16, 18, 22, 25, 27, 28, and 29. The notes of Mr. Maryatt were reduced by Prof. T. H. Safford. The methods of this reduction will be found in the reports on Green River 185 186 ASTRONOMY. (1873) and Santa Fé (1873). Salt Lake is about 675 miles. Except on two nights, when the old ‘overland” wire was used, the route was by way of Diamond Springs and Corinne, at which stations there were repeaters. Corinne repeater. The length of circuit from Virginia City to By the ‘‘overland” wire the circuit was independent of the Other information in relation to this place is the same as given in the report on Green River. Tabulation of stars used for determination of time. Name of star. VIRGINIA CITY, NEVADA. SALT LAKE CITY, UTAH. August 15. August 20. August 25. August 27. August 28. August 15. August 18. Sas arineo as OD oD i eae RX POBREBAD Br Qa wo °o =) Ophiuchi Ophiuchi Herculis Scorpii - Draconis Herculis Herculis Groombr. Ophiuchi Hereulis Groombr. 2415 Herculis Hereulis Serpentis Ophiuchi Groombr. Draconis Ophiuchi Draconis Draconis Herculis Hereulis Herculis Draconis Sagittari Ophiuchi Herculis BAY WA 966, 8. P_. Waecee soso August 20. | August 25. | August 27. | August 28. Sagittarii DWWAe aA Groombr. Serpentis 2533 Herculis Brad. 2313 xX KX ASTRONOMICAL STATION—VIRGINIA CITY, NEVADA—1873. 187 Tabulation of stars used for determination of time—Continued. VIRGINIA CITY, NEVADA. SALT LAKE CITY, UTAH. Name of star. | August 15. August 18. August 20. August 25. August 28. August 15. August 18. August 20. August 27 August 28, SHR emernancl ase oae Draconist------=--- ANTDMIES, Samecnceooee Aquilz Capricormigstee --2:||------ Capricornia--cec=-5\ss2 == oe es eeee es aoe eee eee ee +8 07 04.11 NORMAL EQUATIONS. + 10.00 d¢+5.04a+ 1.91e=—7,93 dt =-+ 08.11 + 5.04 dt+426a+ 2.09¢e=—7.07 a=— 15.871 + 1.91 dt + 2.09 a+ 13.40 e=— 1.07 c=-+ 08,195 Norr.—The observations taken at Salt Lake City August 15 and 18 are printed in the report on Fort Union ; those of August 25 in the report on Labran, ASTRONOMICAL STATION—VIRGINIA CITY, NEVADA—1873. 197 The following tables give the corrections and rates of the chronom- eters used at Virginia City and Salt Lake City : CHRONOMETER AT VIRGINIA CITY.—Neaus, No. 1499. Date Local sidereal | Correction of chro- | Adopted hourly P time. nometer. rate, 1873. h. 8. oh 8. Aug. 15 18.5 — 41.943 + 0.019 0. 000 Aug. 18 18.5 — 15.571+ 0.018 0. 000 Aug. 20 18.1 — 16.476 + 0.017 — 0.020 Aug. 25 18.7 — 18.304+0.018 + 0.050 Aug. 27 17.9 — 18.440 + 0.017 — 0.030 Aug. 28 18.0 — 18.799 + 0.016 — 0.030 CHRONOMETER AT SALT LAKE CITY.—Necus, No. 1511. Date Local sidereal | Correction of chro- | Adopted hourly time. nometer. rate. 1873. h. h. m. 8. 8. Aug. 15 18.0 +8 07 06.40 — 0.011 Aug. 18 18.75 05. 90 + 0.003 Aug. 20 18,75 06. 34 + 0. 002 Aug. 25 19.5 04, 37 — 0.008 Aug. 27 19.4 04.13 — 0.003 Aug. 28 19.5 +8 07 04.10 0. 000 198 ASTRONOMY. Final results of longitude. % 2 eS Mean of sig-| : J os Bs Signals sent from—}| Recorded at— /nalssent and Timescornec, Gcected oS, 2 5 Means. | received. ‘ y oa 25 He 16 aie |= August 15, 1873: eh at hom 8. Asm. 8: Th Mt. 58. (is «Eb m 8. peas alt Lake City.|/10 59 16.69 |+ 8 07 06.39 |19 06 23.08 Salt Lake City. } Virginia City - -|18 36 03,43 |— 0 00 41.94 [18 35 21.49 | 31 01.59 vinwinia Cit Salt Lake City -|11 04 43.63 |4 8 07 06.39 |19 11 50. 02 8 ‘Y--)| Virginia City --|18 41 30.24 |— 0 00 41.94 |18 40 48.30 | 31 01.72 |.--.| 31 01.655 August 18, 1873: : : Salt Lake City.|10 46 28.69 | 8 07 05.90 |18 53 34.59 Salt Lake City- 9 | Virginia City .-|18 22 48.73 |— 0 00 15.57 |18 22 33.16 | 31 01.43 g Virginia Cit Salt Lake City-|10 52 40.30 |+ 8 07 05.90 |18 £9 46.20 s ¥--9| Virginia City--|18 29 00.27 |— 0 00 15.57 |18 28 44.70 | 31 01.50 |....| 31 01. 465 August 20, 1873: eaiet Salt Lake City.|10 39 59.09 |4 8 07 06,34 |18 47 05.43 Sele ike he City. } Virginia City ..|18 16 20.52 |— 0 00 16.48 |18 16 04.04 | 31 01.39 Virginia Cit; Salt Lake City .|10 50 38.60 |+ 8 07 06.34 | 8 57 44.94 8 ¥--)| Virginia City. ./18 26 59.82 |— 0 00 16. 48 |18 26 43,34 | 31 01.60 |-.-.| 31 01.495 August 25, 1875: ovat Salt Lake City.|11 07 48.10 |4 8 07 04.37 |19 14 52. 47 SERED EEO: } Virginia City ..|18 44 09.32 |— 0 00 18.30 |18 43 51.02 | 31 01. 45 Faas On Salt Lake City|11 13 88.97 |4 8 07 04.37 |19 20 43.34 Basia ity.-} Virginia City..|18 49 59.96 |— 0 00 18,29 |18 49 41.67 | 31 01.67 |..-.| 31 01.560 August 27, 1873: eet te Salt Lake City-|11 34 20.90 |4 8 07 04.13 |19 41 25.03 ait Lake City-» | Virginia City -.|19 10 42.01 |— 0 00 18.48 |19 10 28.53 | 31 01.50 caesar OH Salt Lake City-|11 40 08.93 |+ 8 07 04.13 |19 47 13.06 ee ity ..} Virginia City .-|19 16 29.97 |— 0 00 18.48 |19 16 11.49 | 31 01.57 |----| 31 01.535 August 28, 1873: : Salt Lake City-|11 34 06.19 |+ 8 07 04.10 |19 41 10.29 pelt Lake City. } Virginia City ../19 10 27.46 |— 0 00 18.84 |19 10 08.62 | 31 01.67 Vircinia City .. §| Salt Lake City-/11 39 48.68 |4 8 07 04.10 [19 46 52.78 | . irginia City --)| Virginia City.-|19 16 09.95 |— 0 00 18.84 |19 15 51.11 | 31 01.67 |....) 31 01. 670 Virginia City west of Salt Lake City .......-.-.--.-------0% 31™ 015.563 -| 05.025 (by sums of errors). Salt Lake City west of Greenwich Virginia City west of Greenwich--...-.--.------------------7 58™ 368.423, or 119° 39’ 06.55. Virginia City west cf Washington -+ 05.023 (by sums of squares). 7» 27m 345.86. 2h 50™ 248,303, or 42° 36/ 04.55. ASTRONOMICAL STATION—VIRGINIA CITY, NEVADA—1873. 199 Mean places of stars for 1873.0 used for determination of latitude of Virginia City, Nevada. Cl ac : Gal 5 iS) C OH |. Right - < | : Right : 2 ie oe IE Declination. || 5°3 s< ©_;..,| Declination. es Fis ascension. Z| Zo ascension. ety Ge || Ce Le lin Wane ERY 4 1§ | 6021 | 17 41 29 | 27 47 47.24 |) o9§ | 6986 | 20 12 24 | 39 58 22. 84 G052 46 02 | 50 48 42.76 7001 14 £0 | 38 36 27.10 2) | 6U87 | 17 53 39 | 30 12 04.70 || 5, § | 7008 | 20 15 39 | 39 00 13.62 6129 59 50 | 48 27 33.02 || ~ 7022 17 40 | 39 51 04.58 6185 | 18 07 56 | 54 14 56.46 |) 99§| 7062 | 20 23 09 | 48 57 46.08 6223 13 57 | 24 23 41.64 || ~ 7067 24 12 | 29 56 45.58 6238 | 18 16 04 | 28 48 40.10 6252 17 56 | 49 39 50.26 6349 | 18 31 07 | 38 47 32.54 6357 33 595 | 39 33 26.28 6355 | 18 32 38 | 38 40 00.02 m oO ial 2 . 6390 40 08 | 39 32 18.94 2 7320 58 09 | 38 09 23.70 79 | 6404 | 18 42 09 | 41 18 23.16 9g) | 7368 | 21 07 32 29 42 25.30 6456 49 17 | 36 48 50.68 || ~ TALL 15 06 | 48 58 25, 62 8 6466 | 18 50 04 | 36 44 19.10 97 $ | 7490 21 20 33 | 18 49 34.90 6473 60 48 | 41 26 28. 68 7476 23 55 | 59 11 52.84 g§ | 6497 | 18 55 13 | 31 58 08. 16 98 6520 57 51 | 46 45 20.56 7520 31 49 | 18 44 54.76 103 | 6547 | 19 O1 35 | 28 25 48.64 |! x. 9 3 | 7559 21 37 16 | 40 29 53.02 6566 05 19 | 50 09 34.52 || ~ 7566 38 10 | 37 42 10.92 iB 6581 | 19 09 26 | 38 55 43.64 99 § | 7598 | 21 42 06 | 48 43 20.63 6624 14 43 | 40 07 38.44 = 7607 44 14 | 29 35 01.76 2) | 6656 | 19 19 56 | 43 08 30.58 31 7695 | 21 59 54 | 46 37 01.26 6667 21 35 | 36 03 52. 02 7721 | 22 03 36 | 32 33 10.36 135 | 6681 | 19 23 29 | 57 46 18.90 39 742 | 22 05 43 | 15 24 56.48 6695 26 31 | 20 39 39.60 7775 09 50 | 62 31 57.04 14$§| 6718 19 30 33 | 42 08 08.36 933) | 8128 23 13 50 | 41 22 59. 44 6722 31 15 | 36 39 50, 42 : 8136 14 46 | 37 29 21.22 159 | 6741 19 34 25 | 49 55 39.90 3 8195 | 23 25 03 | 38 32 19. 46 6740 34 22 | 29 51 42.58 8212 28 25 | 39 32 11.84 16 6754 | 19 36 55 | 45 13 29.92 8231 | 23 32 59 49 46 07.08 4 67 a 35 784 AL 36 | 33 26 00.74 6817 | 19 46 16 | 40 16 40.06 |] 5, 6849 51 19 | 38 09 01.08 6896 | 19 58 13 | 16 45 56.90 || 2. 6932 | 20 03 31 | 61 37 37.32 t 6959 | 20 09 00 | 51 04 56, 40 6973 10 30 | 27 25 33.24 ry ~ #396 | 23 51 42 | 49 43 54.96 8374 | 0 00 01 | 28 19 14.46 oe co om OR en een sn ose eee eae eee ee e—ersneseerereeeeeeeeee_ em *Tnstead of B, A. C. 7566 the star Riiincker 9430 was twice used by accident ; its position from the cata- logue of 981 stars is AR = 215 38™ 21s, declination = 37° 43/ 28.80. It is a well-determined star. The pair B. A. C. 7559 and Riimcker 9430 is designated as 298, The pair formed from 6456 B. A.C. (pair 7), and 6473 B. A. C. (pair 8), is denoted by 74. 200 ASTRONOMY. Observations and computations for latitude. VIRGINIA CITY, NEVADA. Level. Corrections. No.of} Microm. ., | Half-sum of 5 Date. | star. readings. Remarks. qeclination. Geran : Tatiinde. N. iS) aaret ys Level. | Merid. 1873. ih d. d. fo} i “us / ut a Mt ofl “ August 13 | 6547 20. 668 | 27.0 | 10.7 6566 20.986 | 15.0 | 22.7 39 17 49.21 |— 0 12.26 |+ 1.99 |...---. -|39 17 38.94 6581 13.785 | 20.6 | 20.3 6624 35. 880 | 12.8 | 28.3 31 48.88 |— 14 11.71 |— 3.52 |...--.. 33. 65 6656 | 35. 670 | 29.0 | 29.8 : 6667 6. 633 | 22.4 | 35.3 36 19.07 |— 18 39.31 |— 3.17 |.----.- 36.59 6681 16.950 | 29.7 | 29.0 6695 24, 002 | 22.3 | 35.1 13 06.44 |+ 4 31.84 |— 2.80 |-.---... 35. 48 718 93.035 | 31.2 | 27.0 6722 12,850 | 22.0 | 36.2 24 07.08 |— 6 32.61 |— 2.31 |----..- 32.16 6754 24, 629 | 31.5 | 26.7 6777 21.043 | 23.4 | 35.0 19 52.84 |— 2 18.23 |— 1.57 |------- 33.04 6817 14, 350 | 32.9 | 25.6 6849 21.542 | 31.7 | 26.8 12 58.14 |+ 4 37.23 |4 2.82 |.-.----- 38. 19 6896 25.043 | 28.0 | 30.3 6932 16.174 | 30.5 | 28.1 11 53.85 |+ 5 41.89 |4+ 0.02 |.-.--.-- 35. 76 6959 17. 882 | 29.0 | 29.8 6973 91,335 | 34.5 | 24.2 15 22.06 |4-- 2 13.12 |+ 2.20 |---.--- 37.38 6986 28. 657 | 25.1 | 33.4 7001 28.771 | 33.6 | 25.0 17 32.34 |+ 0 04.39 |+ 0.07 |------- 36. 80 7008 10. 235 | 34.0 | 24.7 7022 22.977 | 24.0 | 34.7 25 46.46 |— 8 11.17 |— 0.32 |---.--- 34. 97 7062 28.794 | 29.0 | 29.8 7067 13. 623 | 25.0 | 33.8 97 23.02 |— 9 44.81 |— 2.22 |-.----. 30. 99° 7164 19.711 | 28.4 | 30.3 7198 24,914 | 34.3 | 24.8 20 55.30 |— 3 20.56 |4+ 1.76 |.--.--- 36, 50 7218 34, 484 | 29.0 | 30.0 7246 7.698 | 30.3 | 28.7 34 47.92 |— 17 12.55 |+ 0.14 |---.--- 35.51 7277 26. 445 | 27.2 | 31.8 7320 14, 670 | 30.4 | 28.7 25 11.08 |— 7 38.90 |— 0.67 |.------ 36. 51 7368 22.717 | 33.2 | 25.3 7411 27.253 | 23.9 | 35.4 20 32.24 |— 2 54.85 |— 0.83 |.--.--- 36. 56 7450 36. 600 | 32.0 | 27.2 7476 10. 567 | 27.9 | 31.2 00 50.25 |+ 16 43.54 |+ 0,25 |---.--- 34.14 7495 20.311 | 29.6 | 29.4 7520 17. 227 | 40.4 | 18.3 19 33.34 |— 1 58.88 |+ 5.16 |------. 39. 62 —) ‘) 59 15. 847 | 31.0 | 28. 6 56 32. 661 | 27.9 | dl. 39 06 47.43 |4+ 10 48.14 |— 0,07 |.....-./39 1735.50 v Date. star. No. of LATITUDE DETERMINATIONS. 201 Observations and computations—Continued. Microm. readings. __ | Half-sum of Remarks. qu clination. 1873. August 13 | 7598 7607 7695 7721 7742 7775 8128 8136 8195 8212 8231 8256 8284 8307 8326 8374 August 16 | 6087 6129 6185 6223 6238 6252 6349 6357 6355 6390 6404 6456 6466 6473 6497 6520 | 6547 6566 6581 6624 6556 6667 t. 15. 359 28. 273 34, 600 7. 183 32. 912 3. 254 26. 451 32. 943 35. 651 11, 959 16, 941 24, 289 10. 973 28. 051 14. 877 39, 724 16. 180 19. 839 28.744 25, 842 21.769 16.740 20. 267 9, 378 20. 117 8. 503 5, 503 27. 049 30, 572 11.762 15. 293 21. 943 20.709 21. 081 13. 331 25, 479 36, 541 7.416 38 58 32.70 39 26 15.55 02 20.78 12 53, 44 28 37.68 01 39. 57 19 57.19 19 27.23 14 23.5 10 37.95 06 18. 14 03 45. 43 21 52.74 17 49. 86 31 49,56 39 36 19,76 VIRGINIA CITY, NEVADA. Corrections, t Latitude. poe Level. | Merid. 1 “ “ “ D ¢ ; “ + 817.81 |+ 0.51 |.....--. 39 17 35. 95 — 17 36.86 |— 1.16 |...--.- 33. 96 + 19 03.29 |4+ 1.39 }...-..- 37. 38 — 8 40.70 |— 3.73 |...-..- 31. 12 + 15 13.27 |— 1.90 |..--... 32. 15 + 4 43.25 |— 0.12 |..---.- 36. 57 — 10 58.32 |— 1.43 |...--.- 37. 93 + 15 57.20 j— 1.53 |.-..--.- 30. 84 — 2 21.04 |— 0.19 |....--- 35. 96 — 1 51.87 |— 0.00 |.----.- 35. 36 + 3 13.86 |— 0.63 |..---.-. 36.73 + 6 59.74 |— 3.22 |.---..- 34. 47 + 11 18.98 |— 1.94 }..-..... 35. 18 + 13 51.89 |4+ 1.34 |..--..- 38. 66 + 12 05.08 |— 1.02 |.----.- 36. 47 — 4 16,34 |— 0.72 |...-.-- 35. 68 — 0 14.34 |— 0.44 |....-..- 30. 08 — 14 13.75 |4 2.25 |.------ 38. 06 — 18 42.70 |4 0,65 |..-...- 39 17 37.71 202 ASTRONOMY. Observations and computations—Continued. VIRGINIA CITY, NEVADA. Level. Corrections. No. of | Microm. _. | Half-sum of Fre Date. star. | readings. Remarks. declination. Mien Latitude. N. Ss. Peal rete Level. | Merid. 1873. te d. d. fo) i a“ ‘ a“ a “ul (oe) i a“ August 16 | 6681 17,393 || 26:1 | 2653. 6695 24.379 | 19.1 | 33.3 39) 1307. 120 4529529) )|\— Sade sesso 39 17 33. 08 6718 22. 800 | 27.0 | 25.3 6722 12.665 | 19.0 | 33.3 24 07.80 |— 6 30.68 |— 2.92 |+0. 06 34. 26 6741 30. 378 | 26.2 | 26.1 6740 17.763 | 23.3 | 29.0 25 43.32 |— 8 06.28 |— 1.32 [40.35 36. 07 6817 14, 430 | 25.9 | 26.7 6249 21. 656 | 13.8 | 38.7 12 58.90 [+ 4 38.54 |— 5.93 |.----- 31.51 6896 23. 870 | 27.0 | 25.3 : €932 24. 962 | 21.3 | 31.1 11 54,28 |+ 5 43.39 |— 1.88 |.----. 35.79 6959 17. 659 | 27.0 | 25.3 6973 21.194 | 16.1 | 36.2 15 22,84 | 2 16.28 |— 4.26 |..---.. 34. 86 6986 28.548 | 29.1 | 23.3 7001 28. 661 | 19.1 | 33.4 17 33.15 |+ 0 04.36 |— 1.97 |.----. 35. 54 7008 10.136 | 19.1 | 33.3 7022 22 843 | 28.5 | 24.0 25 47.26 |— 8 09.83 |— 2.25 }.---.. 35.18 7062 27 304 | 25.0 | 27.7 7067 12. 080 | 22.7 | 30.0 27 23.84 |— 9 46.85 |— 2.32 |.----. 34. 67 7164 20. 888 | 22.7 | 30.0 7198 26.077 | 28.2 | 24.5 20 56.13 |— 3 20.02 |— 0.83 |.----. 39. 28 7218 33. 122 | 26.1 | 26.6 7246 6.323 | 29.8 | 23.0 34 48.81 |= 17 13.05 |. 1.46 |).----. 37. 22 7277 25. 670 | 26.2 | 26.3 7320 13. 854 | 23.0 | 29.8 25 11.94 |— 7 35.48 |— 1.60 |.----- 34. 26 7368 22.113 | 26.9 | 25.9 TALL 26. 664 | 23.4 | 29.8 20 33.12 |— 2 55.43 |— 1.25 |.----- 36. 44 7450 35. 012 | 23.0 | 30.1 7476 | 8. 890 | 25.0 | 28.3 00 51.10 |+ 16 46.97 |— 2.41 ]...-- 35. 66 7A95 21.043 | 30.1 | 23.2 7520 18.011 | 19.0 | 34.5 19 34.19 |— 1 56.88 |— 1.99 |.----. 30. 32 7559 14, 356 | 23.3 | 30.2 7566 31.141 | 30.7 | 23.0 06 48.34 |4+- 10 47.02 |+ 0.19 |.-.---- 30. 55 7598 15.726 | 27.0 | 26.6 7607 28. 667 | 19.0 | 34.7 09 18.53 |+ 8 18.85 |— 3.54 |..---. 53. 84 7695 33. 687 | 27.1 | 27.1 % 7721 6.303 | 22.5 | 31.8 39 35 12.90 |— 17 35.59 |— 2.15 |...--. 35, 16 7742 31.139 | 22.9 | 31.4 7775 1, 484 | 32.9 | 21.6 138 58 33.52 |4+ 19 03.17 I+ 0.65 I...... [891737 34 LATITUDE DETERMINATIONS. Observations and computations—Continued. VIRGINIA CITY, NEVADA. 203 Level. Corrections. No.of} Microm. axe | Half-sum of . Date. star. | readings. Remarks. declination. Macro Latitude, N. Ss. andrei Level. | Merid. 1873. te d. d. fo} / a ‘ a“ “ a“ (o) / “ August 16 | 8128 26. 087 | 28.6 | 27.6 8136 12.581 | 22.5 | 33.4 39 26 16.26 |— 8 40.63 |— 2.28 |...... 39 17 33. 8195 30. 067 | 26.2 | 29.4 8212 11.355 | 34.8 | 21.0 02 21.68 |+ 15 14.04 |4+ 2.45 |....... 32. 8231 15.359 | 28.0 | 22.0 8256 22.689 | 27.5 | 28.5 12 54.32 |4+ 4 42.56 |— 0.23]... .. 36 8284 10. 147 | 26.0 | 30.0 8307 27. 354 | 35.3 | 20.7 28 38.57 |— 11 03.29 [4 2.45 |....... 37 8326 4.300 | 26.1 | 29.9 8374 29.117 | 23.9 | 32.0 01 40.44 |+ 15 56.64 |— 2.76 |....... 34 August 18 | 6959 | 18, 097 | 28.1 | 26.8 6973 21.523 | 20.7 | 34.2 15 23.35 |+ 2 12.08 |— 2.82 ]..._.. ay. 7008 10. 455 | 26.4 | 238.3 7082 23. 292 | 34.3 | 20.8 25 47.79 |— 8 14.83 |+ 2.69 |..._... 35. 7062 26. 982 | 28.0 | 27.3 7067 11. 672 | 28.0 | 27.3 27 24.36 |— 9 50.16 |4+ 0.32 |..._-. 34 7164 19. 403 | 25.0 | 30.2 7198 24.612 | 30.5 | 24.9 20 56.68 |— 3 20.79 |+ 0.09 f....-. 35, 7218 33.772 | 27.2 | 28.1 7246 6. 820 | 39.7 | 15.8 34 49.35 |— 17 18.94 |+ 5.32 }....... 35 7277 26. 690 | 30.7 | 24.9 7320 14. 856 | 26.6 | 28.9 25 12.50 |— 7 26.17 |+ 0.81 |....... ov. 7368 22. 182 | 24.0 | 31.4 7All 26.877 | 37.8 | 17.9 20 33.70 |— 3 00.98 |4+ 2.89 |..___. 35. 7450 33. 991 | 27.0 | 28.5 7476 7.879 | 24.7 | 31.0 00 51.66 |+- 16 46.58 |— 1.81 }....-- 36. 7495 20.634 | 30.9 | 24.6 7520 17.600 | 19.0 | 36.3 19 34.75 |— 1 56.96 |— 2.55 |...... 35. 7559 14. 445 | 36.3 | 19.1 7566 32. 147 | 16.8 | 38.7 06 10.00 |+ 11 22.37 |— 1.09 J.._.-. 31 7598 16.021 | 338.5 | 16.9 ‘ 7607 28. 877 | 17.7 | 37.8 09 19.12 |4+ 8 15.58 |— 0.35 |...... 34 7695 32.691 | 38.7 | 17.0 7721 5. 208 | 19.1 | 36.7 35 13.51 |— 17 39.41 |-+ 0.95 |...--. 35. 7742 32. 337 | 26.9 | 28.9 (ctoyby |) 24780 sen | 1957 58 34.07 |-+ 18 59.40 |+ 3.61 |-...-- 37. August 22 | 6349 20. 582 | 24.7 | 29.8 6357 9.952 | 44.0 ! 10.3 39 10 39.00 |+ 6 50.53 I+ 6.62 |..._-. .[39 17 36. 204 Date. 1873. A, gust 22 ASTRONOMY. Observations and computations—Continued. VIRGINIA CITY, NEVADA. Level. Corrections. No. of} Microm. Half-sum of = star. | readings. Remarks: declination.| yyicrom. Latitude. N. S. aug insite Level. ie d. d. Oo / a ‘ a“ aul fe) l a“ 6355 26. 452 | 24.9 | 29.5 6390 8. 883 | 30.7 | 23.8 59 06 19.20 |+ 11 17.36 |+ 0.53 39 17 37.09 6456 27.019 | 25.5 | 28.8 6473 9.773 | 27.2 | 27.2 07 49.33 |+ 9 47.70 |— 0.76 36. 27 6497 16. 251 | 24.7 | 29.9 6520 22. 967 | 31.5 | 23.0 21 53.92 |— 4 18.89 |4+ 0.76 35. 79 6547 21. 639 | 25.0 | 29.0 6566 22.016 | 26.4 | 28.0 17 51.05 |-- 0 14.53 |— 1.30 35. 22 65R1 14. 583 | 21.0 | 33.2 6624 36. 734 | 32.9 | 21.6 31 50.82 |— 14 13.87 |— 0.21 36.74 6656 37. 150 | 32.1 | 22.3 6667 8.009 | 19.0 | 35.7 36 21.06 |— 18 43.31 — 1.60 36.15 6681 18. 440 | 39.8 | 15.0 6695 25. 322 | 16.0 | 38.8 13 08.37 |+ 4 25.29 |+ 0.46 |+0.83 34.95 718 23. 434 | 37.2 | 17.6 6722 13.241 | 4.0] €0.8 24 09.16 |— 6 32.92 |\— 6.30 |40.03 29. 97 6734 29.109 | 45.8} 9.0 : 6740 16.390 | 9.0 | 45.6 25 44.67 |— 8 10.29 |4 0.05 |+0.37 34, 80 754 26.490 | 51.0| 4.0 777 22.902 | 4.0 | 51.0 19 54.94 |— 2 18.31 |— 0.00 |.----.- 36, 63 6959 18.789 | 32.1 | 23.3 6973 22.199 | 25.8 | 29.9 15 24.33 |+ 2 11.45 |+ 1.09 |-.----.- 36. 87 6986 29.553 | 44.2 | 11.2 7001 29.527 | 17.1 | 38.2 17 34.68 |— 0 01.00 |+ 2.75 |.-----.- 36. 43 7008 11. 028 | 15.9 | 39.7 7022 23.846 | 43.0 | 12.3 25 48.82 |— 8 14.10 |4 1.60 }..--..- 36. 32 7062 28. 699 | 29.3 | 26.3 7067 13. 375 | 18.1 | 37.4 27 25.40 |— 9 46.85 |— 4.93 }.------ 33. 62 7164 20. 925 | 24.6 | 31.1 7198 26.200 | 33.8 | 22.0 20 57.74 |— 3 23.34 |4+ 1.23 |.-.--.- 35. 63 7218 33. 834 | 29.4 | 26.2 7246 6.973 | 27.1 | 28.7 34 50.42 |— 17 15.44 |+ 0.37 |------- 35. 35 7277 26.769 | 30.0 | 25.9 7320 14, 890 | 32.9 | 17.0 25 13.60 |— 7 37,90 |+ 6.02 |.------ 41.72 7368 22.650 | 27.2 | 28.6 7411 |f 27.251 | 26.7 | 29.3 20 34.81 |— 2 57.36 |— 0.93 |..----.- 36, 52 7450 36.903 | 26.1 | 30.0 7476 10. 871 | 31.1 | 25.0 59 00 52.74 |4+ 16 43.50 [4+ 0,51 |...--.- 39 17 36.75 LATITUDE DETERMINATIONS. Observations and computations—Continued. VIRGINIA CITY, NEVADA. Level. Corrections. No. of | Microm. |—— Half-sum of 77 pe Date. star. | readings. Remarks declination. Micron Latitude N. Ss. Fail ain. Level. | Merid. 1873. ip d. d. Ores a“ / “ “ut “ of “ut August 22 | 7495 20, 654 | 25.3 | 30.7 7520 17. 640 | 27.9 | 28.1 39 19 35.86 |— 1 56.19 |— 1.30 |.----.. 39 17 38. 37 7598 13. 558 | 22.0 | 34.0 7607 26. 473 | 30.2 | 25.8 09 20.28 |4- 8 17.85 |— 1.76 |.-.---. 36. 37 7695 33. 430 | 35.3 | 26.0 7721 5, 950 | 23.0 | 33.0 39 35 14.71 |— 17 39.29 |— 0.16 }..-.-... 25, 26 7742 31. 024 | 32.0 | 24.0 7775 1.385 | 26.3 | 29.8 38 58 35.17 |+ 19 02.56 |4 1.04 |......- 38. 77 August 25 | 7062 27.388 | 34.1 | 29.7 7067 11. 987 | 35.2 | 28.6 39 27 26.14 |— 9 53.67 |4+ 2.55 |.------ 35. 02 7218 33. 293 | 34.2 | 17.6 7246 6.510 | 12.0 | 39.9 34 51.20 |— 17 12.43 |— 2.62 }...-.- 35.15 7277 25.513 | 38.7 | 13.1 7320 13. 548 | 19.0 | 33.2 25 14.40 |— 7 41.22 |4 2.64 |.-.--..- 35. 82 7368 22.163 | 23.2 | 29.0 7A1L 26. 802 | 26.9 | 26.0 20 35.63 |— 2 58.82 |— 1.18 |.------ 35. 68 "7450 | 34.302 | 25.9 | 27.0 ; 7476 8. 269 | 29.0 | 23.8 00 53.54 |-+ 16 43,54 |-+ 0.95 |..---.- 33. 03 7495 21.214 | 31.3 || 21.2 7520 12.129 | 18.0 | 35.0 19 36.66 |— 1 58.92 |— 1.59 |...-.--- 36.15 7559 13.508 | 33.8 | 19.1 7566 31.250 | 18.0 | 35.0 06 12.02 |-+ 11 23.91 |— 0.53 |.-.---- 35. 40 7598 15.105 | 26.1 | 26.7 7607 27.961 | 25.9 | 27.0 09 21.15 |+ 8 15.57 |— 0.39 }....... 36. 33 7695 33. 054 | 40.2 | 13.1 7721 5.571 | 11.1 | 42.2 39 35 15.60 |— 17 39.41 |— 0.93 }.------ 35. 26 7742 29. 603 | 26.8 | 26.8 7775 0.016 | 24.1 | 29.3 28 58 36.00 |+ 19 00.55 |— 1.20 |-+0.13 35. 48 August 27 | 6959 17.597 | 26.6 | 24.3 6973 20. 923 | 31.0 | 20.2 39 15 25.49 |4+ 2 08.21 4 3.03 |...--..- 36.73 6986 28. 810 | 36.3 | 14.9 7001 28.790 | 18.3 | 33.0 17 35.88 |— 0 00.77 |+ 1.55 |.----.- 36. 66 7008 10. 279 | 18.0 | 33.8 1 7022 23.126 | 36.8 | 15.0 25 50.04 |— 8 15.22 |4 1.39 |..---.- 36, 21 7062 27.991 | 18.9 | 32.6 7067 12.630 | 34.0 | 17.6 27 26.63 |— 9 52.14 |4 0.65 |..---.- 35. 12 7164 19. 734-| 22.6 | 29.2 7198 25.011 | 31.2 | 21.0 39 20 59.03 |— 3 23.42 |+ 0.83 |..---.- 39 17 36, 44 206 ASTRONOMY. Observations and computations—Continued. VIRGINIA CITY, NEVADA. Level. No.of} Microm. Half-sum of Date: star. | readings. Remarks.| qeclination. N. s. 1873. 1. d. d. Caas tt August 27 | 7218 33. 061 | 27.8 | 24.5 7246 6.140 | 27.9 | 24.7 39 34 51.70 7277 26.172 | 47.0] 5.2 7320 14.240 | 7.6 | 44.9 25 14.92 7368 21.520 | 25.3 | 27.0 7411 26. 232 | 34.0 | 18.3 20 36.17 7450 34. 046 | 22.0 | 30.3 7476 8.460 | 36.4 | 15.9 00 54. 66 7495 20.501 | 25.9 | 26.7 7520 17. 338 | 28.5 | 24.1 19 37.20 7559 14.707 | 28.5 | 24.1 7566 32.392 | 26.9 | 26.0 06 12.56 7998 13.721 | 33.7 | 19.0 7607 26.538 | 21.0 | 32.0 09 21.72 7695 32.841 | 34.3 | 19.0 7721 5. 336 | 21.1 | 32.3 39 35 16.18 7742 31.490 | 25.9 | 28.0 7775 1.939 | 28,2 | 25.3 38 58 36. 56 August 28 | 6896 24.793 | 14.2 | 25.8 6932 16.000 | 24.1 | 15.7 39 11 57.24 6959 17.654 | 26.7 | 29.8 6973 21.1387 | 21.9 | 34.3 15 25.71 6986 27.€00 | 27.2 | 29.0 7001 27. 852 | 23.8 | 32.9 17 36.11 ) 7062 27.417 | 29.9 | 27.0 7067 12.090 } 25.3 | 31.3 27 26.86 7164 19. 235 | 24.0 | 33.3 7198 24.472 | 31.0 | 26.9 20 59.28 7218 32. 384 | 34.0 | 23.9 7246 5.479 | 25.3 | 32.7 34 51.94 2277 25. 912 | 39.0 | 19.1 7320 13.985 | 19.0 | 39.1 £5 15.17 7368 21.197 | 27.1 | 31.5 7411 25.907 | 47.0 | 12.1 20 36. 44 7450 33.961 | 26.2 | 32.1 7416 7.953 | 33.3 | 25.4 00 54.31 7495 19,574 | 36.3 | 22.4 7520 16, 422 | 23.3 | 55.4 39 19 37. 46 Corrections. Microm. and refr. Level. Merid. Latitude. + + / au a 17 17.76 |+ 0.02 7 39.95 |+ 1.04 3 01.64 |+ 3.24 16 40.57 |-+ 2.82 2 01.93 |-+ 0.83 11 21.44 |+ 1.69 8 13.33 |4 0.66 17 43,61 |-+ 3.06 18 59.17 |-4+ 0.19 5 38.96 | 0.74 2 14.26 |— 3.59 0 02.00 | 0.21 9 50.83 |— 0.7: 3 21.68 | 1.20 17 17.13 |4 0.63 7 39.76 |— 0.05 3 01.56 |4+ 7.06 16 42.19 |4- 0.66 39 17 33. 96 36. 01 37.77 36. 38 37.90 35. 31 36. 20 30. 44 35. 46 41.94 37.16 39 17 36, 37 LATITUDE DETERMINATIONS. Observations and computations—Continned. VIRGINIA CITY, NEVADA. 207 Level. Corrections. No. of| Microm. _, | Half-sum of — 3 Date: shar. | readings. IE declination. Micron . Latitude. N. Ss. anrohe Level. | Merid. 1873. ts a. d. Ch et pees utd e CP bg he August 28 | 7559 15.535 | 40.9 | 18.0 7566 38.213 | 21.6 | 37.2 39 06 12.84 |-+ 11 21.71 |+ 1.23 |.____.. 39 17 35.78 7598 12. 902 | 24.7 | 34.2 7607 25.700 | 35.4 | 23.3 09 22.00 |+ § 14.06 |+ 0.86 |...----| 36. 92 7695 32, 269 | 38.7 | 21.0 7721 4.697 | 27.6 | 32.1 39 35 16.48 |— 17 40.26 |4 0.95 |....... 37.17 7742 29.751 | 26.3 | 33.3 7775 0.240 | 38.7 | 21.0 38 58 36.84 4 18 57.62 |+ 2.48 |.__.__. 36. 94 8128 26.018 | 32.0 | 30.2 8135 12. 365 | 33.0 | 29.2 39 26 20.08 \— 8 46.29 |4+ 1.50 |...... . 35. 09 8195 33.652 | 34.7 | 27.0 8212 10. 167 | 26.2 | 35.3 02 25.25 |+ 15 05.29 j+ 1.99 |......- 32.53 8231 15. 648 | 28.9 | 32.3 8256 22.784 | 40.7 | 20.3 12 57.89 |+- 4°35.07 |+- 3.94 |._.._.. 36. 90 8284 Oet197 29087 pale 4 8307 26. 481 | 32.9 | 28.3 28 41.98 |— 11 06.26 |4+ 0.67 |..._... 26.39 8326 4.860 | 33.4 | 27.8 8374 29. 563 | 31.0 | 30.3 ON 4378804215) 52695 I 1-45 Iho. o 37, 58 August 29 | 6021 18.994 | 28.1 | 27.0 6052 20.255 | 28.7 | 26.7 18 24.45 |— 0 48.61 |4+ 0.72 |..__._. 36. 56 6087 16.582 | 26.0 | 29.3 6129 20. 305 | 29.7 | 25.8 19 58.79 |— 2 23.51 |4+ 0.14 | _--..- 35, 42 6238 21, 292 | 27.1 | 28.3 6252 16. 346 | 36.6 | 19.0 14 25.34 |-- 3 10.66 |+ 3.80 |...__-- 39. 80 6349 20. 656 | 26.9 | 29.0 6357 9.937 | 43.9 | 12.0 10 40.02 |+ 6 53.18 |+ 6.90 }......- 40,11 6355 26.549 | 26.9 | 29.0 6390 9.038 | 42.6 | 13.3 06 20.28 |+ 11 15.01 |4- 6.29 |.._...- 41.58 6456 26.961 | 22.6 | 33.7 6473 11.750 | 35.1 | 21.0 07 50.47 |+ 9 46.35 |+ 0.44 |....... 37. 26 6497 15. 724 | 27.0 | 29.2 6520 22.481 | 30.9 | 25.3 21 55.12 — 4 20.47 |+ 0.79 |.....-: 35. 44 6547 20.277 | 26.8 | 30.4 6566 20.740 | 37.1 | 19.2 U7 52.28 =" 0 17.84 |= 3.31 |; .--.-- 37.05 6581 |. 14.658 | 25.7 | 30.4 6624 36. 872 | 41.0 | 15.0 31 52.14 — 14 16.30 J+ 4.93 |..-.... 40.77 6656 36. 462 | 26.3 | 29.9 6667 7. 202 | 32.2 | 24.0 39 36 22.43 |— 18 47.90 }+ 1.07 |-.---.- 89 17 35. 60 208 ASTRONOMY. Observations and computations—Continued. VIRGINIA CITY, NEVADA. Level. Corrections. No. of} Microm. SS ————— Date. | star. readings. Remarks. qeclination. Micron N. Ss. ail mare Level. 1873. t. d. d. Oa H August 29 | 6681 17. 043 | 33.8 | 22.5 6695 23.923 | 27.4 | 29.0 39 13 09.69 6718 23.263 | 29.8 | 26.5 6722 12.993 | 41,8 | 14.8 24 10.58 6754 25.000 | 28.8 | 28.0 777 21.376 | 26.9 | 30.2 19 56.41 6817 15. 122 | 32.0 | 25.2 6849 22,221 | 23.4 | 34.1 13 01.86 6896 24,268 | 27.1 | 30.7 6932 15.553 | 31.1 | 27.2 11 £7.44 6959 17. 393 | 30.6 | 27.8 6973 20.756 | 31.6 | 26.8 15 25.94 |4+ 2 09.64 |4 1.7 6986 28. 642 | 29.4 | 28.6 7001 27.622 | 31.2 | 27.0 17 36.34 |— 0 00.77 |4+ 1.16 7008 10. 081 | 32.8 | 25.3 7022 22.953 | 32.8 | 25.3 25 £0.51 |— 8 16.18 |+ 3.47 7062 26.742 | 31.3 | 26.8 7067 11. 370 | 31.0 | 27.2 27 27.10 |— 9 52.56 |4+ 1.92 7164 90. 137 | 29.8 | 28.9 ; 7198 25. 418 | 34.5 | 24.0 20 59.52 |— 3 23.57 |4+ 2.64 7218 33. 833 | 34.8 | 23.9 7246 6.901 | 26.1 | 32.3 34 52.19 |— 17 18.17 |4 1.09 7277 25. 089 | 38.0 | 10.3 7320 13.140 | 23.7 | 34.6 25 15.42 |— 7 40.60 |4 1.57 7368 21.951 | 29.8 | 28.4 7411 26.681 | 32.0 | 26.6 20 36.70 |— 3 02.33 |+ 1.57 7450 34. 649 | 29.8 | 29.0 7476 8.690 | 31.4 | 27.3 00 54.56 |+ 16 40.69 |+ 1.13 7495 20. 495 | 28.5 | 30.4 7520 7.315 | 34.0 | 25.0 19 37.72 |— 2 02.58 |4+ 1.64 7559 13. 893 | 29.4 | 29.5 7566 31.532 | 34.0 | 25.1 06 13.11 |+ 11 19.94 |4+ 2.04 7598 14.189 | 36.9 | 22.0 7607 26, 952 | 26.0 | 33.0 09 22.28 |+ 8 11.98 |4+ 1.83 7695 34.101 | 35.1 | 23.8 7721 6.523 | 29.5 | 30.5 39 35 16.76 |— 17 43.07 |+ 2.62 7742 30. 271 | 29.0 | 31.0 7775 0.766 | 34,1 | 26.0 38 58 37.12 I+ 18 57.39 I4+ 1,41 Latitude. 36, 39 35. 94 36, 38 36.78 35. 09 36, 09 36, 31 39 17 35, 92 LATITUDE DETERMINATIONS. Observations and computations—Continued. VIRGINIA CITY, NEVADA. 209 a SS Level. Corrections. ? No. of} Microm. Half-sum of att Date. | star. readings. Remarks. declination | yr;crom Latitude. N. 8. smdtretes Level. | Merid. 1873. E d. d. fe} / a “ “ “a (or Wf “l August 29 | 8128 26. 898 | 33.0 | 28.2 8136 13.165 | 33.9 | 28.3 39 26 20.38 |— 8 49.38 |-+ 2.20 |+0.01 |39 1733. 21 8195 34.791 | 26.9 | 34.0 8212 11,183 | 45.0 | 15.7 02 25.55 |4+ 15 10.03 |+ 5.14 |-..-... 40.72 8231 15.143 | 30.8 | 29.7 8256 22.342 | 33.3 | 27.0 12 58.19 |-+- 4 37.50 |4- 1.71 |..-...- 37. 40 8284 Chee) || 2a) || SBE33 8307 26.771 | 35.3 | 25.0 39 28 42.26 |— 11 06.57 |+ 0.93 |.----. -|39 17 36. 62 Discussion of latitude of Virginia City, Nevada. s Ee g ER ; a i“ ~ sl 5 ae = 3 38 3 Base! lh is aie 2 & | a 3 2 S <= DQ . -) irs} =] Q A Oo rs) Sewers 8 layete | = jee] & oS | ve 2 258 g s/s] g = £58 g : . 2 5S e 6 A io} oe) 5a) lars + Sas |) 2 e i) ISS gS a iS 2 @ ae OsS Ee 4/\|4| 4 A |o a mealies 4A is) Qa “ fo) “ " “ ou “ “ 1/ 1 |+40.7 | 39 17 36.56 |/+ 0,01 20] 6 |4+0.6) 39 17 36.68 0. 00 2) 2) 0.0 30. 69 |-++ 0.03 21) 6 /41.1 36. 02 |+ 0.11 ai) a ew 35. 36 |-+ 0.03 PN ee |) OR) 39. 30 |4+ 0.14 | Aug. 22. 4| 2/41.6 38.26 |— 0,04 23] 7 |-+0.6 36. 37 | 0.05 5] 1/-3.2 34.47 |\— 0.10 | Aug. 22,29.]/ 24] 7 |-+0.2 30.53 |-+ 0,24 6) 2 |-0.7 36.14 |— 0.16 | Aug. 29. 25 | 7 |+0.5 36.03 !+- 0.11 | Aug. 22. 7{ LI1L3 38.66 |— 0.18 26] 7 |4+0.5 36.36 + 0.04 | Ang. 28. 7| 2 |—0.2 36.78 |— 0.14 27) 8 |4+0.3 36.50 — 0.23 6 | 1 /-1.0 36.47 |— 0.17 | 28) 7 |-0.6 36.33 -++ 0.02 | Aug. 18. 9|/ 3 }40.3 35.64 |-+ 0.05 298) 2 |40.1 *30,52 |\— 0.15 10 | 4 |+0.9 36.75 0. 00 29 | 5 |+0. 7 34,65 |— 0.16 11] 3 |-0.5 36.15 |-+ 0.20 | Aug. 29. 30} 8 |—0.3 35.70 |— 0.12 12} 4 |—0.8 36.51 |+ 0.26 31} 8 |+0.4 35. 48 | 0.25 13 | 4 |—0.9 35.16 |— 0.06 32 | 8 /+1.2 36.55 |— 0.27 14] 2}-2.6 33.21 |+ 3.09 | Aug. 22,29. || 33] 4 |—0.6 33.24 |-+ 0.12 15} 2 |—0.6 35. 44 |+ 0,11 34} 3 /+0.8 34,28 |— 0.21 | Aug. 29. 16} 3 |—-0.7 35. 27 |-+ 0.03 30 | 4 /|41.3 36, 88 |— 0. 06 17 | 2 |+1.0 36.40 |— 0.06 | Aug. 16. 36 | 4 |40.7 37.17 |+ 0.15 13 | 4 |—0.6 30.20 |— 0.08 37 | 3/-0.9 | 39 17 35.25 — 0.22 19 | 6 |40.3 | 39 17 36.22 |— 0.03 | Aug. 16. _* Pair 29° is composed of Riimcker 9430, which takes the place of B. A. C. Excluding, as before, all observations whese level-correction exceeds An Laiitude from 13 pairs observed 1 or 2 times ......-. .--.---- ---.---- 39° PGMA O Gri@eOn ll Geidln WEE soos sora sass eons oeeode neloesle cueneHe Latitude from 13 pairs observed 8, 4, or 5 times --......-....-...---.-39° Erobableverroniotel suchspaileener oan aes feo tee Latitude from 13 pairs observed 6,7, or 8 times-...-.-.-.---..... -... 39° Exobableerrorotlasnchipair aes a eee os nee is. Finally, giving these results relative weights of 1,2,3,we get final MabHiuderaciescs cess k eee ae 7 socse Seah esecny 14 ast 7566 from pair 29. we have: 17’ 36/7.02 + 0.24 =E 0.38 17’ 35/.55 = 0.24 se ier 17’ 367.13'== 0.075 + 0.27 17’ 357.92 + 07.097 210 ASTRONOMY. Virginia City, Nevada.—Excluded pairs. = 3 pate Latitude with | Latitude without | Corr.: to Ae ale: level-correction. | level-correction. | micr.-corr. cA) fe) ‘ a“ fo} / a“ a“ 5 | August 22 39 17 36.15 39 17 29.53 — 0.10 August 29 40. 11 33. 21 — 0.10 6 | August 29 41.58 30. 29 — 0.16 11 | August 29 40.77 35. 84 + 0.20 14 | August 22 29. 97 36. 27 + 0.09 August 29 41. 63 34. 62 4- 0.09 17 | August 16 31.51 37. 44 — 0.06 19 | August 16 34. 86 39, 12 — 0.03 22 | August 22 33, 62 38.55 + 0.14 25 | August 22 41.72 35. 70 + 0.11 26 | August 28 41. 94 34, 88 + 0.04 28 | August 13 39, 62 34, 49 + 0.02 34 | August 29 39 17 40.72 39 17 35.58 — 0.21 Mean with level-correction, (13 observations) .--.-.----------- 39° 17’ 38’’.02 SHANG? Chimie bossa cepoas 6650 coccen Hons G ones coma coo Sson cess 47" 9 Probable error of 1 observation ...--...----.---.------- J -22e= + 3/024 iPropableterronOferesalG esses teen eine ala =E 0/790 Mean without level-corrections, (13 ebservations)...---.-.----- 39° 17' 35/.43 Sumlof ervorsas-- <2 = == senate ra eee ee eee eee = 21.1 Probable error of 1 observation..-.- .----. .----. -------------- x 1.43 iPropablelerrolior Tes0 trees a= se see eee eee eee eee eee + 0.40 The intr oduction of the micrometer-correction produces no perceptible effect. ASTRONOMICAL CO-ORDINATES OF VIRGINIA CITY, NEVADA. Longitude. .78 58™ 368.423 + 08.024 or 119° 39/ 06”.35 + 0/.36 west from Greenwich. 66 Latitude . 22 50™ 248,303 or 42° 36/ 04.55 west from U.S. Naval Observa- tory, Washington, D. C. Sake 39° 17/ 35”.92 + 0”.10 north. U. 8. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN. GEO. M. WHEELER, Limut. or ENGINEERs, U. S. ARMY, IN CHARGE. RESULTS OBSERVATIONS MADE BY DR. F. KAMPF AND JOHN H. CLARK IN THE DETERMINATION OF THE ASTRONOMICAL CO-ORDINATES OF GEORGETOWN, COLORADO. SEASON OF 1873. COMPUTATIONS BY Dr. F. KAMPF anp JOHN H. CLARK. 211 , « v a rots - . “@ ‘4 & i - . ‘ ' 4 4 f 62 ? 2 GHORGETOWN, COLORADO. GEOGRAPHICAL POSITION OF STATION. Longitude, . . 105° 01/ 27.64 + 0.05 west from Greenwich. Latitude,. . . 39° 42/ 36.36 + 0.06 north. Barometric altitude of observatory above sea-level, 8587.8 feet. Georgetown, the site of this astronomical station, is the principal town of Clear Creek County. Its inhabitants are chiefly interested in mines and mining business. Their number in 1873 was reported to exceed two thousand. The astronomical camp was situated on the eastern side of the valley, at the foot of Griffith’s Mountain, on a knoll overlooking the town. Oppo- site the camp, on the western side of the valley, Republican Mountain rises precipitously to a height exceeding 2,000 feet, and is succeeded in the north by the Democrat and Upper Empire Peaks. Above the camp, Alpine Creek flowed down, passing near the astronomical tent. In a southern direction, the Georgetown valley is closed by Leavenworth Mountain, which is bounded on either side by a great gulch, opening into the town, through which a brawling stream descends. Owing to the rocky nature of the ground, it was found impossible to set the square stone pillar, which served as a meridian and latitude mark, with its faces in the plane of the meridian, and it was placed in a diagonal position, facing a little south of east. METEOROLOGICAL CONDITIONS. The condition of the atmosphere was unfavorable for work of this nature. The weather was stormy during the first days of occupation, and after the 26th of June large forests in the southwest were continually burning, and, when the wind was from that direction, the observer was compelled to relinquish his task, on account of the undulations with which the air was 213 214 ASTRONOMY. affected by the heat. In the daytime the temperature was very high, but at night the thermometer would sink to 40° or 35° F., and in one instance, the night of June 30th, snow fell to a depth of several inches. Owing to the inauspicious state of the weather and the sky, this was the most incon- venient station of the season, and it was with great trouble that the obser- vations were accomplished at all. The following table shows the general direction of the wind and the appearance of the sky: Direction of wind. Date. Condition of the sky. 12 p.m.to | 8a.m.to4]| 4 p. m. to 8a,m. p.m. 12 p.m. 1873. June 20 8. N. S. Cloudy the whole day. 21 8. Ss. 8. E. Aurora borealis at 0.30 a.m.; clear. 22 S. S. W. S. Cloudy at 3.30 a. m. 23 N. N. N. Partly cloudy. 24 S.E. S.W. s. Do. 25 8. E. Ss. 8. Clear. 26 S. W. Ss. W. Ss. W. Clouding up at 5 p.m. 7 8. N. S. W. Clear. 28 S. E. 8. E. Ss. Very heavy wind; partly cloudy. 29 8. E. 8. N. W. Heavy wind at 4 a.m.; very violent at 2.10 p, m., and bringing up clouds. 30 Ss. N. N. Cloudy from 0a. m.; wind very violent at 11.25 a. m.; at | 7 p.m. commencing a rain-storm; continued until— July 1 || 8. Ss. 0.30 a.m.; then snow-storm ; flakes one-quarter of an | inch in diameter. 2 8. S.E 8. E. Cloudy ; at 2.30 p.m.rain and thunder; clearing up at 9 p.m. 3 | 8. E. 8. Ss. Clear. 4 | S. N. W. S. E. In daytime partly cloudy; at night clear. 5 S. 8. E. Ss. Clear. OBSERVATORY—TELEGRAPHIC COMMUNICATION. In its arrangement, the observatory was similar to the one at Colorado Springs, described in the astronomical report of 1874. The president of the Western Union Telegraph Company granted authority for the use of their lines. The main wire was deflected, by means of a loop, into the observing tent, a distance of nearly 700 yards. In sending signals, assist- ance was rendered by Mr. John Jay, in charge of the Western Union office at Georgetown. The distance to Denver is about 40 miles; from Denver to Salt Lake City it is 690 miles; making a total circuit-length of 730 miles. The signals were sent directly to Cheyenne, and were there CONNECTIONS—OBSERVERS—COMPUTERS. 215 repeated to Salt Lake. The battery in use at the station was a small but effective instrument of two Grove cells belonging to the survey. The astronomical and meteorological instruments were the same as those at Colorado Springs, with the same instrumental values for the reduction of observations. CONNECTIONS-—OBSERVERS—COMPUTERS. The astronomical observations at Georgetown were conducted by Dr. F. Kampf, who arrived at this station on the 5th of June, but was unable to begin operations until the 20th of the same month, being retarded by a delay in the arrival of the instruments, and by their incomplete condition when they came. Further delay was then experienced by reason of difficulty in introducing the wires for telegraphic correspondence. Exchanges for time were made with the station at Salt Lake City, Mr. John H. Clark in charge. In this exchange, signals were sent from Salt Lake City on the nights of June 23, 25, 27, and 28, and July 2 and 3, and from Georgetown on June 23 and 28, and July 2 and 3. Mr. Clark reduced his observations for time after returning to the office. Compu- tations for the corresponding observations at Georgetown were made by Dr. Kampf, in the field. Observations for latitude were made by the latter on the nights of June 22, 26, and 27, and July 1, 2, 4, and 5, and were reduced by him in the office from the 20th to the 28th of January, 1874. The meteorological records were kept with great care by C. D. Gedney, and privates J. Clancy and J. Meyer. 216 ASTRONOMY. Tabulation of stars used for determination of time at Georgetown, Colorado, and Salt Lake City, Utah, 1873. GEORGETOWN, COLORADO. SALT LAKE CITY, UTAH. 3 DB, Name of star. | June 28, | June 23. June 2 | June 26. | June 27. Juno 28. NE \O EOS) Gem eee co doses WEWSS sopses assess 2 soot : Eee Urs Majoris.-----.-.--- Se |) 36) SK | SK |[seee ee sc |ecc|leoe-|[eaes||sese||sose\)-222|[eoo- eee (ane aS ISMN HE) ssess 5 coscce Sos xX |X| X!/ X I---- ea WORKERS -o-cecce ceeces| lance sx | 2x Draconis.--.-- .------- Pe ee >.< WENTEINTS cossocoo tases: ||saes||Sa65 x IRN ena oe oo sae5 Se x|x|x x x Patt Bootisic222.hoee se x |x x x xX: x XX xX XX x XX x x S 5 wel, is} eo x x x x 151000) Nee ee nan Sigal SEE, SS IBOGUR eee ae uses x I x< TB) hi) eee tae ae ol eee ee ee Ursz Minoris..---..--- de || Xe Li isdaeas costa coon x |X IBoohisi WO PeDDA VTE NDR AAIISYA gS BL ice) io) iS) of = D O ‘ ‘ ‘ , H ‘ ' ' H ‘ ' H Libre x XXKX Heese to cance ceret os nh 0 ' ‘ ‘ ' ' ' ' ‘ ' ' ' (Cie a= Sess capes| Soe] |Soo5| esse [Fa Serpentis\2ss-2s-.-s sees | == see eee SEHTPGN 1G 6 concep pasate eaoa||seos|lsoes|[ascelleete)| D€ jjsese|ioae SGUTAM Re seceee ccecesl esos locos Isso} [os55) loose ||ESee| eos) sea lesce| [ess lesealls25|[Eses|[-==- NCOnp HW sen eee ee eae eee ee ee e505) !soais|fecea| loss Draconis =~ s-fre aee ee ee | eee eeloa soee||=sec||-se-|/s2es)/ex2 Draconis...--- Be eesc aoe Sooo) [ecnc|bsoe|[eece ésieie| escc|leceo| ee QOphiuelil -2222<5---- al seee Bee eleoe sees a A is Herenlis)-c222. «scccn-s|eeee beealllesteel|esealaaee Pena eel ome eee xXKXX xXXXXKX iene at an . ' ' ‘ ’ ud RaASrSs wD [| ay } x xX wee) ee=-]--== Ophiuchie----4-- eee. a (Sal See Pees eee bstalee | a ons| SM OS x S| |Saer pe. Herenlia. 225% oe ese pets ak | | Bl Pee Seed Noe | pe al Pee I eo > See eee eee Urs Minoris:.2 2-332 6.|b ca ee er eee Lea ie. [oneal aes poe) eres Meee fae Herculis\=2--=-)-5= eet epwe|esee| [eo 22|223)es 22! sessliaseq|) 3€ || OS |[aesei] OX Sea SES IES AEX AasOphinchi=-4---e6e- => PS (Mire (eee (ae 12 Rt st Si Ve a le Pa LA |e al (eA Se Deere (et) | Semeth (ES Groombr.: 966. E...C. 2 2. 24)2 2 24). 2 | eee ee eof Draconis <= 22 oene Se C .2(4 aS ee Be Ophinshivess=—-ass =| ose Sates (So ee | res | eee eee ee Draconis: ssese a> -\e=- Se |) SX Hercnlisi= scans SESS ke ese Se | aa oe Draconisypn ea. oe- 25 |= | oe ones | ates oe eee Draconisesss-eReeeao Db bes
  • . sscs-os-|-00- SC Ss eS eee eee eel ea] eee Oe x Hee eae ERC CHL a opt ~ ‘ 7 ' . ‘ ’ ogee! ~ ee 5 =|[s2e¢ x Iya Ne poesoscmemccetse| nese anal Xe lssesieece| lec sal] Se cie IDM enon no pemoec eased eee eeestea Ss) Re sel] OS jRoesilancel/ssec|lososlesg- x x QWRESSESO Meee ERD Sept TS ese Komeee|lecimel| 4 Sal as SOWDraconisten--- sere seen lees eee aoe ae TIME DETERMINATIONS. Tabulation of stars, &e.—Continued. Name of star. GEORGETOWN, COLORADO. 217 SALT LAKE CITY, UTAH. 25.79 -+ 6.14 dt — 17.76 a + 50.02 € ec =-+ 05.65 ojo |/olx lala : - 2 Ga INO) a RS | eo : 2 , NINIRIRINQIAl sala lA RI/RIRIAlail alate Br epee 2/2 |e pel S| aie els | elo | i=] i=} = i=} =! Ss S i=} =] t=} i=] S 5 s i= i=} 5 PS) IS it tea es eS eS Ss te as sy Py tes iss S| os Ge PAQuilsvenclenece aie sr |e - 53|(S= 55 mS (6 esec|inn = eal Mee Lees eco sllensalecee|sece d s-|----]----]| X - - --| X |----]- ----|----| X -- 3 eee ]--- Ol ea fees |S eses|t= = Sone cel |ocs a Sree eer 65} [50 x Sele cals --|-- --|-. -- z Seed oy === p= --|-+- ones e-]----]-- --]-- 0]. --|-- --]-- --|-- Observations and reductions for time taken at receiving station. GEORGETOWN, COLORADO, JUNE 23, 1873. Z I Name of star. Ge. Aa. Bb. Ce. Ts AR. AT. ‘Ss hm 8. 8. 8. Gh [lhe Glo Ga |W ites Mm. 8. Weipa me VInGinisensss=ss- 13 32 18.47 |4+ 0.23 |— 0.01 |— 0.66 |13 32 13.03 /13 18 31.32 | — 13 41.71 WAVE Mircinis®ss222o5. 41 56.72 |+ 0.19 |— 0.06 |— 0.65 41 56.20 £8 14.5 41.70 W.| 7 Urs Majoris....| 56 16.74 |— 0.08 |— 0.12 |— 1.00 56 15.54 42 33.&2 41.72 WW 77 Beotisyasee see. 14 02 21.90 |-+ 0.11 |— 0.07 |— 0.69 |14 02 21,25 48 39. 62 41.63 W.| @ Draconis........ 14 43,41 |— 0.29 |— 0.15 |— 1.53 14 41.44 |14 00 59.63 41.31 E. | a Bootis 23 34.54 |+ 0.10 |— 0.08 |+ 0.69 23 35, 25 09 53.54 41.71 ‘E. | 6 Bootis 34 35.41 |— 0.10 |— 0.19 |+ 1.06 34 36.18 20 54. 36 41.82 E. | 5 Urs Minoris....| 41 33.89 |} 0.73 |— 0.47 |-++ 2.72 41 35, 41 27 53. 52 41,89 E. | e Bootis 53 09.29 |-+ 0.07 |— 0.20 |-+ 0.73 53 09. 89 39 28. 10 41.79 E. | @ Urs Minoris....|15 04 50,28 |— 0.63 |— 0.53 |+ 2.44 |15 04 51.56 51 10.10 41.46 ra|/9e (Boouisy.essece-=- 10 52.82 0.00 |— 0.22 [-+ 0.85 10 43.45 [14 57 11.63 | — 13 41.82 Meantab4e1o=localisidereal timess-co.ssss= eet e-ee = eeseee ce eceeeres ae oe — 13 41 73 Hxclusiveroty Gi Urge Minors rcs seee sere oan eee eects saa see aee eens — 13 41 76 NORMAL EQUATIONS. O=— 0.27-+ 11.00 St¢— 3.97 4+ 6.14¢ ot = — 08.23 0=+ 6.62— 3.97 d¢ + 13.58 a —17.76¢ a =- 05.29 0=— 8 ASTRONOMY. Observations and reductions for time taken at receiving station—Continued. GEORGETOWN, COLORADO, JUNE 23, 1873. a : I Name.of star. or Aa. Bb. Ce. ais AR. AT. 5 he. mM: 18. 8. 8. 8. em. 18: hm 8. mn. 8. I. | « Ophiuchi--.....- 17 05 22.71 |+ 0.08 |— 0.13 |-+ 0.65 /17 05 23.31 |16 51 41.32 | — 13 41.99 BSB) Draconis!-------- 41 17.61 |— 0.05 |— 0.37 |-+ 1.05 41 18.24 |17 27 36.31 41.93 iB} | @) Draconis-----e- 51 26.32 |— 0.23 |— 0.32 |+ 1.77 51 27.54 37 45.58 41.96 By | 2) HMerculis)sss-s-e- 55 12.66 |+ 0.03 |— 0.14 |+ 0.72 5b) 13; 27 41 31.36 41.91 W.| y. Draconis ...---.- 18 07 25.20 |— 0.08 |— 0.07 |— 1.02 |18 07 24.03 53 42.07 41,96 W.| wv! Sagittarii -..-..- 19 54.79 |-++ 0.12 |— 0.03 |— 0.68 19 54.20 |18 06 12.34 41.86 W.| 7 Serpentis -...--.| 28.28.93 |-+ 0.09 |— 0.04 |— 0.64 |18 28 28, 34 14 46.27 | — 13 42.07 Mean‘ at 17\30™ localisidereallitime=--..-2 5-2-5 asec eoeee ser ceeesceaneee — 13 41. 95 NORMAL EQUATIONS. 0=— 0.73-+ 7.00 dt —0.18a-+ 278c¢ dt = — 05.15 O=+ 261—0.18 dt+528a— 5.19 ¢ a=+0813 0=— 10.01 + 2.78 dt —5.19 a + 17.33 ¢ c =-+ 05.64 GEORGETOWN, COLORADO, JUNE 25, 1873. & Name of star. on ’ Aa. Bb. Ce. ne AR. AT. a lop Gite 8. Ss. 8. (Brite. LF Asgms eae m. &. W.| 7 Urse Majoris.-..-|13 56 15.67 |+ 0.25 |— 0.11 |— 1.02 |13 56 14.79 |13 42 33.78 | — 13 41.01 We 7) Bootis <2 see==5 14 02 21.60 |— 0.33 |— 0.13 |— 0.70 |14 02 20. 44 48 39.61 40. 85 Wel) @ Vireinis=---4-- 08 54.57 |— 0.54 |— 0.10 |— 0.66 08 53. 27 55 12.34 40. 93 Wing | Ree BOOLIS seen ecee 23 35.62 |— 0.32 0.11 |— 0.70 23 34.49 |14 09 53.52 40. 97 Wall Ua Bootisise=sesisee 34 26.39 |+ 0.32 |— 0.14 |-— 1.08 34 35, 49 20 54.33 41.16 E.|5 Urse Minoris....] 41 29.66 |+ 2.22 |— 0.50 |+ 2.77 41 34.15 27 53.38 40.77 LBS AR) Sass s555o5 48 47.55 |— 0.39 |— 0.14 |+ 0.69 48 47.71 35 06. 55 41.16 Be |e Bootisyss-2. css 53 08.76 |— 0.21 |— 0.16 |+ 0.74 53 09.13 39 28.08 41.05 E. | 6 Ursew Minoris.-.-./15 04 47.24 |4+ 1.92 |— 0.46 |+ 2.49 |15 04 51.19 51 09.97 41, 22 105 || /6 LOO ea socoee 10 51.93 |-+ 0.03 |— 0.30 |+ 0.87 10 52.53 |14 57 11.60 | — 13 40.93 MeaniatJ4> 20 milocallsiderealitime aeseeeeeeseiteen nee nei eee eee — 18 41.00 NORMAL EQUATIONS. 0=— 632+ 10.00 dtE— 3.33a-+4+ 5.17 ¢ dt= 08.00 0 = + 22.86 — 3.33 d¢t-+ 12.10 a— 18.44 ¢ a==— 05.88 0 =— 45.59-- 5.17 dt — 18.44 a-+ 44.44¢ c= -+ 08.66 TIME DETERMINATIONS. 219 Observations and reductions for time taken at receiving station—Continued. GEORGETOWN, COLORADO, JUNE 25, 1873. a I Name of star. rT: Aa. Bb. Ce. 4 Uf. AR. AT. s) him. 8. 8. as 8. hem 8 hm. 8 Mm. 8 E. | o Draconis .......- 17 51 24.25 |+ 1.16 |— 0.58 |+ 1.89 /17 51 26.72 |17 37 45.56 | — 13 41.14 BE. | #2 Herculis ..-.-.-. 55 12,24 |— 0,21 |— 0.29 |4+ 0.77 5p 12551 41 31.38 41.13 E. | ~! Draconis ..-...--. 57 54.39 |-+ 1.53 |— 0.64 |4+ 2.27 57 57.55 44 16.30 41,25 aly Draconis). --- ---- 18 07 22.02 |+ 0.50 |— 0.33 |+ 1.09 |18 07 23.28 53 42. 07 41.21 Bye 0) Hereulisie-c- -o-- 16 18.25 |— 0.19 |— 0.24 |+ 0.78 16 18-60 |18 02 37.38 41, 22 We) Draconis;-4-- ---- 35 48.09 |+ 0.54 |— 0.20 |— 1.32 35 47.11 22 05. 92 41.19 Wei) Aquile2..3---- 42 02.40 |— 0.66 |— 0,07 |— 0.70 42 00.97 28 19.81 41.16 Wis)|| @ laymeaie sc oo 54 46 22.68 |— 0.02 |— 0.12 |— 0.88 46 21.66 32 40. 47 41,19 W.| 6 Sagittarii ....... 19 01 08.75 |— 0.89 |— 0.06 |— 0.76 119 01 07.04 118 47 25.77 | — 13 41.27 Meantat io st2milocalisidereall time, -s..<2-2-sie2ea= 2a cerca omase cece eceese — 13 41.26 NORMAL EQUATIONS. 0=— 3.12-+9.00 dt— 2.04a+ 4.60c dt = — 68.20 0=-+ 13.28 — 2.04 dt 7.35 a — 10.68 ¢ a=— 08.87 0 = — 29,85 + 4.60 dt — 10.68 a + 31.43 ¢ c= -+ 02,68 GEORGETOWN, COLORADO, JUNE 26, 1875. rv EI Name of star. Whe Aa. Bb. Ce. Ae AR. Ne 5 Te Me 8 8. in 8. liste ob Rams 8: rie eee W.| 7 Urs Majoris -...}13 57 13.94 |4+ 0.95 |+ 0.06 |— 0.89 |18 57 14.06 |13 42 33.75 | — 13 40.31 Wil 7) Bootisiesses a'35™ local sidereal time, -4-s< == 8 31 07.58 + 0.26 |— 0.04 |\— 0.30 | 8 31 07.50 |16 38 34.70 W.| « Ophbiuchi -.-.---. 44 10.71 |+ 3.76 |— 0.02 — 0.24 44 14.21 51 41.32 W.|d Herculis .----.--. 49 29.07 |+ 1.05 |— 0.01 |— 0.28 49 29.83 56 57.00 W.| e Urs Minoris..-- 51 22.21 |\—35.11 |— 0.05 |— 1.74 50 45.31 59 12.54 W.| a: Herculis --..-.-.| 9 01 23.01 |+ 3.27 |— 0.00 |— 0.24 | 9 01 26.04 |17 08 53.38 E. | B Draconis ---- ----. 20 11.16 |— 2.36 |4 0.02 |4+ 0.39 20 09.21 27 36.31 E. | o Draconis ---.. ---- 30 26.97 |— 9.30 |4+ 0.06 4 0.65 30 18.38 37 45.57 E. | Hereculis ........ 34 02.03 |4 1.82 |4 0.02 |4 0.27] 3404.14] 41 31.36 E. | #1 Draconis ..-. .--.- 36 00.59 |—12.21 |4+ 0.02 |4+ 0.77 35 49.17 44 16.31 E. | y Draconis -...-.--. 9 46 16.30 — 2.14 |4+ 0.00 4+ 0.38 | 9 46 14.54 |17 53 42.07 Mean at 174.0 local sidereal time NORMAL EQUATIONS. 410.00 dt 7.12a— 152c=+ 0.81 ét—+ 05.23 4 7.12 dt +. 29.49 ai —25.21e=— 874 a? = — 08.150 — 1.52 dt — 25.21 a! + 85.01 c= +4 23.37 c—-+ 05.235 Adopted azimuth : —7*.00; a=— 7*.15. +48 07 27.48 27. 27. oT. +8 07 27. ie 07 27.23 TIME DETERMINATIONS. 225 Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, JUNE 27, 4873. = I Name of star. Bie Aa. Bb. Ce. res AR. AT. a hem. 8. a 8. 8. hom. 8. hem 8 hm. 8. By @) (BOOtiSses= tena 6 13 31.08 |+ 0.67 0.00 |+ 0.06 | 6 13 31.81 |14 20 54.28 |+8 07 22.47 #. | 2 Virginis’ .--- ---- 29 02.35 |— 1. 46 0.00 |-+ 0,04 29 00. 93 36 23.53 22. 60 Hee) Bootisysss-se—5-- 32 05.90 |— 0.53 0.00 |-+ 0.04 32 05, 41 39 28. 06 22. 65 Ba? Libres’ <-2==----; 36 32.02 |— 1.75 |4+ 0.15 |4+ 0.04 36 30. 46 43 52.81 22.35 E. | @ Ursx Minoris.-.-. 43 42.41 |+ 4.29 |+ 0.80 |+ 0.15 43 47.63 51 09.85 22. 22 E. | B Bootis ..-----.-- 49 48.68 |+ 0.00 |+ 0.34 |+ 0.05 49 49. 07 57 11.58 22.51 W. | 48 Cephei, 8. P --.--- 57 00.43 |— 8.12 |— 0.55 |— 0.16 57 51.60 |15 04 13.91 QOL Walon Wolbrs) s--—-. ee 7 02 51.09 |— 1.56 |+ 0.17 |— 0.04 | 7 02 49.66 10 12.11 22. 45 Wai 02 abr! seca <= 08 37.78 |— 1.73 |+ 0.15 |— 0.04 08 36.16 15 58. 52 22.36 W. | yz! Bootis ...-.. ---- 12 20.98 |— 0.14 |+ 0.33 |— 0.05 12 21.12 19 43.51 22. 39 W.| ¢ Libre ......---- 16 11.51 |— 1.77 |+ 0.15 |— 0.04 16 09. 85 23 32. 40 22.55 a Corone ...--.--- 7 21 58.37 |— 0.54 |4 0.28 |- 0.04 | 7 21 58.07 |15 29 20.47 |48 07 22.40 Mean at 154.0 local sidereal time .----..----. ------ ------------ +--+ +--+ +++ ---- +8 07 22.45 NORMAL EQUATIONS. +12.00 t+ 6.23a— 0.10c=— 7.28 dt = ++ 08.45 + 6.23 dt + 24.03 a — 27.73 c= — 46.99 a= — 2.029 — 0.10 dt—27.73 a + 48.71c=-+ 58.12 c= - 08.035 SALT LAKE CITY, UTAH, JUNE 27, 1873. i= eI Name of star. we Aa. Bb. Ce. Te AR. AT. i) hm. 8. 8. 8. 3. |h. m. 8. |h. m. 8. m. 8. W.| a! Herculis .-..--.-. 9 01 31.94 |— 0.81 |4 0.22 |— 0.10 | 9 O01 31.25 |17 08 53.40 |+8 07 22.15 We Groom. 966, S. P-- 15 26.23 |— 6.07 |— 0.40 |+ 0.38 15 20.14 | 5 22 42.21 22. 07 W.| a Ophiuchi---..--- 21 42.94 |— 0.79 |4 0.22 |— 0.10 21 42.27 |17 29 04. 36 22. 09 W.| o Draconis .--..--- 30 20.81 |+ 2.28 |-+ 0.63 |— 0.28 30 23, 44 37 45.53 22. 09 W.| » Herculis .....--- 34 09.57 |— 0.44 |+ 0.29 |— 0.11 34 09.31 41 31.38 22. 07 W.| y~ Draconis .--.---- 36 50.84 |+ 2.99 |+ 0.75 |— 0.33 36 54.23 44 16.27 22.04 W.| y Draconis .....--. 46 19.30 |-+ 0.59 | 0.42 |— 0.16 46 20.15 53 42.08 21.93 E | 7 Serpentis....---.|10 07 25.45 |— 1.21 0.00 |+- 0.10 |10 07 24.34 |18 14 46.31 21. 97 B. | 1 Aquilx.--.--.... 20 59.18 |— 1.33 |— 0,02 |4+ 0.10 20 57.93 28 19.83 21. 90 E.| a Lyrz.....--.---- 10 25 18.03 |— 0.08 |— 0.06 I+ 0.18 110 25 18.02 |18 32 40. 48 |-+-8 07 22. 46 Mean at 175.5 local sidereal time ....-..----------- -----+ 22-2 cee cere ee cree +8 07 22.08 NORMAL EQUATIONS. + 10.00 dt+ 2.82a— 3.68ce—— 4.47 dt = + 05.08 + 2.82 dt — 18.26 a + 23.35 6 = — 29.53 a =— 15.755 — 3.68 dt + 23.85 a + 42.83 c= — 37.138 ce =-+ 08.097 15 AST 226 ASTRONOMY. Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, JUNE 28, 1873. a I Name of star. Tt Aa. Bb. Ce. TE AR. AT. 2 Pn is 6b 8. 8. Bh Wass a Wee O: hm 8. E. | 6 Bootis .......-..| 6 13 32.62 |+ 0.65 |+ 0.08 |+ 0.19 | 6 13 33.54 |14 20 54.26 |+8 07 20.72 E. | 5 Urse Minoris.-.. 20 27.14 |+ 4.80 + 0.17 |4 0.50 20 32.61 27 53.16 20.55 IDB |e lotyayniss seen 32 07.47 |— 0.51 |+ 0.03 |4+ 0.13 32 07.12 39 28.05 20. 93 Dba Ca) UT ees Soap 36 33:71 |— 1.68 |-+ 0.01 |+ 0.12 36 32.16 43 52.81 20. 65 E. | 8 Urs Minoris---- 43 44.39 |+ 4.13 |+ 0.03 |+ 0.45 43 49.00 51 09.78 20.78 Wiis) beons==so-s--=2— 49 50.86 |— 0.00 |+ 0.05 |— 0.15 49 50.76 57 11.56 20. 80 W. | 48 Cephei, S. P ----. 57 00.94 |— 7.83 |\— 0.32 |4+ 0.54 57 53.33 |15 04 14.00 20. 67 Wie) (eh Les 6 coo 7 02 52.93 |— 1.50 |+ 0.08 |— 0.12 | 7 02 51.39 10 12.11 20. 72 SWin| gots bre ease: 08 39.68 |— 1.66 |+ 0.06 |— 0.12 08 37.96 15 58.52 20. 56 Wes eBootisy=---—-—— = 12 22.95 |— 0.13 |+ 0.18 |— 0.15 12 22.85 19 43.50 20. 65 Wien Conia bres cose a= 16 13.35 |— 1.70 |+ 0.10 |— 0.12 16 11.63 |15 33 32.40 |-+-8 07 20.77 Mean'at 15:0 localsidereal tame) #222 222 3-22 eee esos een ee eee +8 07 20.71 NORMAL EQUATIONS. + 11.00 d+ 2.79a+10.67c=— 7.46 dt = — 08.629 + 2.79 dt-+ 29.4la— 2.15c=—58.68 a =— 15.960 + 10.67 di— 2.15a+6418c=-+ 8.46 o =+ 08.117 SALT LAKE CITY, UTAH, JUNE 28, 1873. S 3g Name of star. T. Aa, Bo. Ce. ike AR. AT. S hom. 8. 8. : 8. lis as Eb [ieetito | oe hm 8. W.| 7 Herculis --...-.. 8 31 13.80 |— 0.09 |+ 0.41 |— 0.11 | 8 31 14.01 |16 38 34.70 |4+8 07 20.69 W.| « Ophiuchi-.-..-..- 44 21.47 |— 1.19 |+. 0.29 |— 0.09 44 20.48 51 41.34 20. 86 W.|d Herculis ---.---- 49 36.52 |— 0.34 |+ 0.43 |— 0.11 49 36.50 56 56.99 20. 49 W..| a' Herculis --.----. 9 01 33.17 |— 1.03 |+ 0.37 |— 0.09 | 9 01 32.42 |17 08 53.40 20.98 E. | # Herculis -...--.- 34 10.39 |— 0.56 |+ 0.55 |+ 0.10 34 10.48 41 31.39 20. 91 E. | y Draconis .-...-.- 46 19.80 |+ 0.67 |+ 0.88 |+ 0.14 46 21.49 53 42.08 20.59 Meanvata’sO0iocal sidereal time) a==~-en= eee anteater ee +8 07 20.75 NORMAL EQUATIONS. + 6.00 dt + 1.13 a— 1.79 c= — 4.20 dt = — 08.25 +. 1,13 dt + 0.66 a — 1.44 o=—1.88 a=— 28.240 — 1.79 dt— 1444+ 9.050 = + 4.44 c= -t 08.087 TIME DETERMINATIONS. 227 Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, JULY 1, 18783. Yi g Name of star. "Ee Aa. Bb. Ce. Aue AR. AT. 3 hem. 8 a 8. 8. hams 8: Rnekite, 2D: hm. 8. W.|5 Ursw Minoris....| 6 20 33.44 |4+ 4.67 |— 0.24 |— 0.42 | 6 20 37.45 |14 27 52.94 |4 8 7 15.49 E. | 5 Ursex Minoris---- 20 32.34 |+ 4.67 |— 0.24 |+ 0.42 20 37.19 27 52.94 15.75 E. | # Virginis .... ..-. 29 08.91 |— 1.37 0.03 |-+- 0. 10 29 07.61 36 23. 46 15. 85 BS |e Bootis: -2-55- -2-- 32 12.52 |— 0.49 |\— 0.05 |+ 0.11 32 12.09 39 28. 02 15. 93 1D || G2 ability Sek Soe seed 36 38.26 |— 1.64 |— 0.02 |4+ 0.10 36 36.70 43 52.79 16. 09 E.| 8 Urse Minoris....| 43 49.35 |4 4.03 |— 0.13 |4 0.38] 43.53.63] 51 09.59 15, 96 W.| 48 Cephei, 8. P..... 57 05.86 |— 7.64 0.14 |-+ 0.45 57 58. el 04 14.31 15. 50 W.| @ Libre....-.....-| 7 02 57.73 |— 1.47 |— 0.04 |— 0.10 | 7 02 56.12 |15 10 12.09 15. 97 W.| o? Libre-..-- sac 08 44.60 |— 1.62 |— 0.04 |— 0.10 08. 42. 84 15 58. 53 15. 69 Wis! 2a BOOnBS) ons) 2-55 12 27.98 |— 0.13 |— 0.10 |— 0.13 12 27.62 19 43, 47 15.85 Wr ince) daibraaeenae- se 16 18.27 |— 1.66 |— 0.05 |— 0.10 16 16.46 23 32.39 15. 93 We a Coron: ----.---. 22 05.21 J— 0.52 |— 0.10 |— 0.11 22 04.43 29 20, 44 15. 96 W.| 7 Serpentis ....--. 27 55.76 j— 0.82 |— 0,11 |— 0.10 27 54.73 35 10.58 15. 85 W.| a Serpentis ....... 30 47.85 I— 1.07 I— 0.10 I— 0.10 | 7 30 46.58 115 34 02.50 |4+ 8 7 15.92 Mean at 155.0 local sidereall time .--------- <5 - ~~ -- 2 8 =< once seen e newts wan=~- +87 15.84 NORMAL EQUATIONS. +14.00 d¢-++ 2.65a-+4+ 3.97c=— 6.92 ét = — 05.16 + 2.65 d¢-+ 36.4la-+ 8.12c—=— 69.31 a—— 15.910 + 3.97 dt-+ 812a+81.82c=— 7.95 c=+ 05.101 SALT LAKE CITY, UTAH, JULY 2, 1873. ea 8 Name of star. Th Aa. | Bb. Ce. 1. AR. AT. 5 hm. 8. ae 8. 8. Rams 180s We. 018s hm 8. E. | uw Virginis 6 29 10.12 |— 1.35 | — 0.07 |+ 0.10 | 6 29 08.80 |14 36 23.51 +8 07 14.71 136 ee Ub pa eSees cece 36 39.88 |— 1.62 |— 0.06 |+ 0.10 36 38.30 43 52.78 14. 48 E. Ursx Minoris.. -- 43 50.87 |+ 3.97 |— 0.31 |+ 0.38 43 54.91 51 09.53 14. 62 Wal /é)_ Pn ccs ecsnscs 49 57.00 |— 0.00 |— 0.10 |— 0.13 49 56.77 57 11.51 14,74 W.| 48 Cephei, L.C..... 56 06.54 |— 7.52 0.19 |-+ 0.45 56 59. 66 04 14, 40 14.74 Wiviol| Yeh ILM Aaa aes 7 02 58.93 |— 1.45 |— 0.05 |— 0.10 | 7 02 57.33 |15 10 12.08 14.75 W. & Wibreesee ssa 08 45.68 |— 1.60 |— 0.03 |— 0.10 08 43.95 15 58. 52 14. 57 W.| 2 Bootis ..----.-..- 12 29.08 |— 0.13 |— 0.06 |— 0.13 12 28.76 19 43. 45 14. 69 1D, |) 443" TOME oS seao ccs 16 19.17 |— 1.64 |— 0.03 |+ 0.10 16 17.60 23 32.38 14.78 BE. | @ Corone ...-..-.--.. 22 06.15 - 0.51 |— 0.05 |+ 0.11 22 05.70 29 20. 43 14.73 KE. | 76 Serpentis ......- 27 56.62 |— 0.81 |— 0.06 |+ 0.10 27 55. 85 35 10.58 14.73 E. | a Serpentis ....--- 30 48.76 |— 1.05 |— 0.06 |+ 0.10 30 47.75 38 02. 49 14.7 E. | e« Serpentis -...-.- 7 37 17.29 |— 1.11 |— 0.09 |+ 0.10 | 7 37 16.19 |15 44 30.94 |48 07 14.75 Mean at 152.0 local sidereal time -.-.--..----. ------ encase es cnteeesines ae va.ce +8 07 14.70 NORMAL EQUATIONS. -+ 13.00 d¢-+ 7.88 a + 10.94 c= — 17.71 dt = — 08.30 +L 7.88 dt + 24.69 a + 12.85 c= — 47.35 =— 18,880 + 10.94 dt + 12.85 a + 47.84 c= — 22.78 e= + 08.100 228 ASTRONOMY. Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, JULY 2, 1873. a 3 Name of star. dks Aa. Bb. Ce. Aus a hem: 8: 8. 8. 8. (Gs = Mal Se E. | # Herculis .... ..--| 9 34 17.16 |— 0.50 |— 0.14 |4 0.27 | 9 34 16.79 |17 41 31.39 |+8 07 14.60 Bey hae Ophinchieesse-es 54 08.04 |— 1.05 |— 0.10 |4+ 0.24 54 07.13 |18 01 21.79 14. 66 aul ie eblerculisiesem ee 10 07 33.06 |— 1.37 |— 0.08 |+ 0.24 |10 07 31.85 14 46.35 14.50 Wie || WAAAY ss-55 ceses 25 26.18 |— 0.10 |— 0.20 |— 0.30 25 25.58 32 49.52 14, 94 W. | 50 Draconis .----2:: 43 14.17 |+ 4.42 |— 0.26 |— 0.93 43 17.40 50 31.99 14, 59 W.| a Sagittarii -..---. 11 03 02.03 |— 1.82 |— 0.03 |— 0.25 |11 03 59.93 |19 10 14.51 |48 07 14.58 Mean at) 18.0) local sidereall time)--2-5--.---5-2--5- -24= eee eae joe weecectesyenes +8 07 14.66 NORMAL EQUATIONS. + 6.00 dé + 0.21a— 3.18c=— 318 ot = — 08.34 + 0.21 dt + 6.62a+ 9.28c—=—11.02 a=— 18,980 — 3.13 dt + 9.28 a + 21.60 c=— 12.33 c= + 03.236 SALT LAKE CITY, UTAH, JULY 3, 1873. & EI Name of star. T. Aa. Bb. Ce. 1ee AR. AT. Ss) leis CF a 8. 8. hm. 8. hm. 8. Ro ans | 8: W.| Virginis.........| 6 29 11.50 |— 1.33 |— 0.07 |— 0.08 | 6 29 10.02 |14 36 23.50 |+-8 07 13.48 Wel G2 ITE Ssnsne ood 7 08 46.86 |— 1.57 |— 0.06 |— 0.08 | 7 08 45.15 |15 15 58.51 13. 36 Wien | Bootise sees neon 12 30.25 |— 1.13 |— 0.11 |— 0.10 12 28,91 19 43, 45 13.54 AW) eG Selaibraaw-cen =e oe ee 16 20.63 |— 1.61 |— 0.05 |— 0.08 16 18.89 23 32.38 13. 49 Nive ||, Chines S35 55 - 22 07.44 |— 0.50 \— 0.09 |— 0.09 22 06.76 29 20. 43 13. 67 E. | 75 Serpentis.-...... 27 57.79 |— 0.80 |— 0.09 |+ 0.08 27 56.98 35 10.56 13. 58 E. | a Serpentis........ 30 49.97 |— 1.04 |— 0.07 |+ 0.08 30 48. 94 38 02. 49 13.55 E. | ¢ Serpentis.-..-.-.. 37 18.38 |— 1.09 |— 0.07 |+ 0.08 37 17.30 44 30.93 13. 63 E. | ¢ Urs Minoris....| 41 24.61 |+ 5.49 |— 0.39 |+ 0.38 41 30.09 48 43.58 13. 49 Ey WBE SCOLpliesse asaeee 50 53.33 |— 1.70 |— 0.05 |+ 0.08 | 7 50 51.66 |15 58 05.15 |+8 07 13.49 Meanat.152.5 looal sidereal time'--vsce=ce ascssecee cee se esa eae eee eee +8 07 13.53 NORMAL EQUATIONS. + 10.00 dt-+ 231a+ 3.54c=+ 1.27 dt=-+ 08.53 + 2.31 dt-+ 12.57 a — 14.82 e= — 23.22 a=— 15,850 + 3.54 dt— 14.82 a+ 34.13 ¢=-+ 31,99 e= -+ 08,077 TIME DETERMINATIONS. 229 Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, JULY 3, 1873. a g Name of star. le Aa. Bb. Ce. 4S AR. AT. 5 = hsm. "8: 8. Be 8s. |h.m. 8 lin Gis ED Rites: E. | ¢ Ophiuchi....-.-.. 8 22 59.89 |— 1.37 |— 0.08 |-+ 0.14 | 8 22 58.58 /16 30 11.98 |+8 07 13.40 E. | « Ophiuchi-.. .-.--. 44 28.83 |— 0.92 — 0.10 |+ 0.14 44 27.95 51 41.34 13. 39 E. | a!. Herculis ..---.-- 51 40.71 |— 0.80 |— 0.06 |+ 0.14 51 39.99 |17 08 53.40 13. 41 E. Groomb. 966, 8. P.| 9 15 35.58 |— 6.04 |+ 0.05 |— 0.52 | 9 15 29.07 | 5 22 42.56 13. 49 W. Groomb. 966, 8. P. 15 34.48 |— 6.04 + 0.05 |+ 0.52 15 29.01 | 5 22 42.56 13. 55 W.| © Draconis -...---- 30 29.90 |+ 2.26 |— 0.00 |— 0.37 30 31.79 |17 37 45. 42 13. 63 We le721Ophiuchim-cs—11.48 ot = -++ 08.47 + 8.64 dt + 27.63 a + 4.18 ¢ = — 43.53 a= — 18,744 —1.73 dt-+ 4.184 -+ 42.47c=— 27 c=-+.08.135 The observations for time taken at Salt Lake City June 25 and 26 are printed in the report on Green River. From these determinations of time the following tables are derived. They contain the corrections and adopted hourly rates of the chronometers used at Georgetown and Salt Lake City. The adopted rate is the mean of the rates of the chronometer at the preceding and following dates: CHRONOMETER AT GEORGETOWN.—Necuws, No. 1491. Date Local sidereal| Correction of chro- | Adopted hourly ‘ time. nometer. Tate. 1873. h. m. hm. 8. 8. June 23 15 52 — 0 13 41, 855 — 0.0155 June 25 16 16 41. 100 — 0.0285 June 26 14 20 40, 150 — 0.0218 June 27 14 20 40, 100 — 0.0050 June 28 1652. 39, 890 -+ 0.0006 June 29 14 50 40. 090 + 0.0128 July 1 14 55 40, 880 + 0.0087 July 2 14 55 40. 900 + 0.0126 July 3 16 13 — 0 18 41,597* + 0.0244 * Mean by giving the last determination the weight 3. 230 ASTRONOMY. CHRONOMETER AT SALT LAKE CITY.—Neeus, No. 1511. Date. Local sidereal Correction of chro- Adopted hourly time. nometer. rate. 1873. h. m. ih. mM. 98: 8. June 23 15 45 + 8 07 27.360 — 0.0544 June 25 16 30 24.610 — 0, 0568 June 26 15 30 23, 350 — 0. 0589 June 27 16 15 22. 260 — 0.0602 June 28 16 00 20, 725 — 0.0652 July 1 15 00 15. 840 — 0.0572 July 2 16 30 14. 680 — 0.0476 July 3 16 15 + 8 07 13.500 — 0.0497 Final results of longitude. 3 Bs Mean of 8ig- lTime-correc-| Corrected Be 2 3 Signals sent from— | Recorded at— |nalssent and Hs oe as =| a received. ; : 6 oo 2s a aé 5 3 aa a) = hm 8 hm 3s. |h.m 8. thm. 38. Shee 8: June 23, 1873: Salt Lake City Georgetown -...| 16 33 33.77/—0 13 41, 84/16 19 51.93 amy ake UUY-) | Salt Lake City.| 7 47 35. 48/8 07 27.35/15 55 02. 83/0 24 49.10 G : Georgetown -..| 16 50 58,10|—0 13 41, 84/16 37 16.26 corgetown --- 4 | Salt Lake City.| 8 05 U0.00/+8 07 27.33/16 12 27.33 48.93 | 0.17 |024 49, 015 ase aed G 39 0 13 41, 08|16 49 58.70 ee eorgetown ...} 17 03 39. 78/—' Al, 7 Salt Lake City.) | Salt Lake City.| 8 17 45.00|-+8 07 24. 60|16 25 09.60, 49.10 Nosignals sent from Georgetown -....|------ BOOSH esoa Scenes saace: | Saseac conassllasaaacasso (48. 94) (0. 16) 49, 020 Tne eee G 141 0 13 40.09/17 00 35.6 : eorgetown ...| 17 14 15.77|—@ 13 40. al 35. 68) Salt Lake City.) | Salt Lake City | 8 28 24.33/48 07 22.24/16 35 46.57| 49.11 No signals sent from Georgetown ; cir- OU OPN sae cane |Jossoss cacese Soos|lsssans sanascllososos coness|[ecaosoneoce (48. 95)| (0. 16) 49. 930 Be tec G 52 57.27|—0 13 39.89/16 39 17.38 Weare eorgetown ..-| 16 52 57. 27|— , 89} AG Salt Lake City - Salt Lake City.| 8 07 07.60|-+8 07 20.7116 14.23.31) 49.07 G a Georgetown ...| 16 58 30. 00|\—0 13 39.89/16 44 50.11 corectow n= } Salt Lake City.| 8 12 50. 46|+8 07 20.70/16 20 11.16 48.95 | 0.12 49.010 July 2, 1873: a ; § | Georgetown --.-| 16 30 29.54/—0 13 40.92/16 16 48. 62 Georgetown .--9| Sait Lake City.| 7 44 44.95/48 07 14.71|15 51 59. 66 48.96 Salt Lake Cit Georgetown ...| 16 35 52. 23/—0 13 40, 92/16 22 11.31 yee Y-)| Salt Lake City-| 7 50 07.47|-+8 07 14.71/15 57 22.18 49.13 | 0.17 49. 045 July 3, 1873: : Georgetown ...] 16 43 52.20|—0 13 41.59/16 30 10.61 Salt Lake City. ; Salt Lake City.| 7 58 08,00|+8 07 13.51/16 05 21.51/49. 10 Geatweinen Georgetown ..-| 16 48 29.57|—0 13 41.59/16 34 47.98 se “7 2] Salt Lake City.} 8 02 45.55/+8 07 13.50/16 09 59.05|0 24 48.93 | 0.17 |024 49. 015 Georgetown east of Salt Lake City Ob 24™ 498,023 + 08.0036. ASTRONOMICAL STATION—GEORGETOWN, COLO.—1873. 231 Mean places of stars for 1873 used for determination of latitude of Georgetown, Colorado. No. of pair. Eee! Bight axgens Declination. || No. of pair. ae Bienes Declination. h. m. 8. St ew h. m. 8. OE ag et : 5463 16 15 55 46 37 00.2 7114 20 30 01 40 39 41.2 1 16 pce eee 5484 18 04 32 37 50.8 Snhinabg 7176 36 15 38 37 51.3 2 5702 49 47 18 38 15.0 7 7211 41 34 66 11 43.6 er ae es 5717 52 18 60 33 57.8 ee ; 7258 49 36 13 14 17.8 3 5763 58 57 30 35 41,4 18 7333 21 00 19 43 25 19.1 chee ata aaa 5775 17 01 13 43 59 09.5 re ae 7373 08 20 36 06 36,2 4 5842 12 38 33 14 17.7 19 7402 13 43 43 24 44.0 ee ae 5871 16 46 46 21 58.6 arpa se 7453 20 36 36 07 10.3 K 5911 23 23 48 22 02.9 20 7465 22 42 31 40 10.8 eet 5962 31 47 SORDIR 04.09 |pue Sooamaes 7496 27 42 47 53 00.6 6 6184 18 07 46 56 14 17.4 21 7545 35 02 56 54 55.2 Oa per ae 6241 16 51 23 13 19.8 Ror sds 7496 40 13 22 21 52.7 7 5 6349 31 06 38 47 32.5 99 7606 44 04 16 41 43.0 AX lig 2 6364 35 27 40 49 11.9 aoe 7658 53 04 63 01 16.3 Sree oo cecss oe 6426 45 02 ae) 40) 04.0) ||) 232 --—- =. 7679 7 31 42 12 07.1 9 6480 52 16 32 44 22.4 24 7743 22 05 47 42 24 24.1 Spe Be 6520 57 51 46 45 20.6 is es) W777 10 26 37 07 O11 10 ; 6583 19 09 16 56 38 35.9 |! 9. 7798 15 27 27 41 29.9 ea egy 6602 12 21 22 47 55.0 SF Ow aa oe 7815 18 34 51 35 35.8 rl 6629 15 38 62 58 36.6 || 26.......... 7824 19 58 50 36 38.1 ei aah a 6642 18 40 16 41 30.8 || 9, 7888 32 10 50 53 23,5 12 6724 31 32 aN sya KORG Atayal | ee eit 7914 35 46 28 38 43.4 a ast te } 6737 33 24 63 09 05.6 28 7943. 40 20 11 31 17.8 13 6762 38 43 26 50 58.6 ag } 7963 44 40 67 53 46.4 Sai ie pa wae 6824 47 26 52 39 58.8 || 59 8074 23 03 52 74 42 03.5 14 . 6856 52 21 BO (OD Wiebe eee 8127 13 52 4 41 18.4 eg ten 6879 55 52 27 24 16.0 1b 7037 20 19 31 68 28 24.3 cotta rid 7079 25 07 10 50 03.0 | \ Norr.—The places of ~ Herculis and y Draconis are taken from the American Ephemeris. Observations and computations for latitude. GEORGETOWN, COLORADO. Level. Corrections. No.of | Microm. _, |Half-sum of . Date. star. readings. ERETES. declination.| yFi6¢9m ie LRU: N. S. and vetn. Level. | Merid. 1873. ip Gh d d. Ope oe 4 as be a cae Wal June 22} 5763 | 11 55.5 | 21.0 | 14.0 : 5775 2 45.2 | 9.0 | 25.5 39 47 23.3 | — 4 42.7 |— 2.6 |.------ 39 42 38.0 5842 | 14 92.7] 9.0 | 25.6 : 5871 4 43.3 | 21.1 | 14.0 48 05.6 | — 5 25.9 |— 2.6 |.----.- 37.1 June 26} 5702] 15 45.2 | 12.0} 18.0 5717 3 66.9 | 7.6 | 23.0 36 05.3 | + 6 37.0 |— 5.9 |.----.- 36.4 5763 5 29.9 | 15.0 | 15.0 5775 | 14 34.3 1 6.0 | 25.0 39 47 24.2 | — 4 40.9 — 5.2 '...--.- 38. 1 232 Observations and computations—Continued. ASTRONOMY. GEORGETOWN, COLORADO. Date. 1873. June 26 June 27 Level. No. of | Microm. star. | readings. N. 8. : t. d. d. d. 5842 | 14 91.6 | 21.0 | 10.0 5871 4 63.5 | 10.0 | 41.0 5911 | 15 88.0] 7.0 | 25.0 5962 4 63.3 | 5.0 | 27.0 wHere.| 12 96.2 | 20.0 | 11.0 yDrac.| 5 89.0] 9.0 | 23.0 6184 | 10 57.8 | 12.0 | 20.0 6241 858.3] 7.3 | 25.0 6426 | 10 91.9 | 16.0 | 16.0 6480 6 74.0 | 16.0 | 16.0 6520 | 10 76.0] 4.7 | 27.8 6583 | 10 12.5 | 17.0 | 15.0 6602 9 32.9} 0.0 | 32.6 6629 2 86.3 | 18.0 | 14.5 6642 | 1693.9] 2.5} 30.3 6724 | 11 63.3 | 19,0 | 14.0 6737 6 07.0] 5.0 | 28.0 6762 | 12 58.5 | 19.0 | 14.0 6824 8 44.7} 0.0 | 33.0 7114 6 47.7 | 15.0 | 18.0 7167 | 14 21.8 | 10.3 | 23.0 7211 | 10 17.5 | 14.0 | 19.3 7258 | 10 66.2 | 21.0 | 13.0 7333 | 13 01.5 | 17.0 | 16.0 7373 6 97.3 | 13.0 | 20.0 7402 | 12 43.9 | 13.8 | 20.0 7453 6 33.8 | 13.0 | 21.0 7465 6 17.7 | 15.0 | 19.0 7496 | 13 59.1 | 16.0 | 18.0 6349 4 55.3 | 14.0 | 22.0 6364 | 15 59.2 | 23.7 | 12.3 6426 | 11 84.2 | 17.0 | 19.0 6480 7 67.8 | 17.0 | 19.3 6520 | 11 81.8 | 17.0 | 19.0 6583 9 15.0 | 13.0 | 22.0 6602 8 06.5 | 26.0 | 10.0 6629 2 02.3 | 26.0 | 11.0 66421 16 23.2! 6.61! 30.0 Remarks. 505 late. Corrections. Half-sum of Fi declination. : Latitude. Microm. Level. | Merid and refr. v : fo} i “ / “ “ a“ fo} / “a 39 48 06.6 | — 5 19.3 |—11.0 |_____..| 39 42 36.3 3675616) 35) 492391 ON eee eee 34,9 SE) DIN t= d) O9st) I — eee 37.5 43 44.8 | — 1 02.0 |— 7.0 }...-..- 35.8 42 37.1 | + 0 04.9 |— 6.4 |.._--.. 35. 6 44 46.2 | — 2 04.8 |— 6.4 |.____.- 35. 0 43 09:8 | — 0) 24.47 |— 84 |.---..- 36.7 CE) EGS) | == 2/16 = OEY Igeocoee 34.0 39 49.5 | + 2 52.8 |— 4.9 |— 0.4 37.0 44 52.1 | — 2 08.5 |— 7.7 |._--..- 35.9 38 38.5 | + 4 00.4 |— 2.7 |.._-..- 36.3 42 53.6 | — 0 15.1 !4 0.7 |......- 39. 2 45 49.5 | — 3 11.3 |— 1.6 ].__...- 36. 6 45 48.8 | — 3 09.5 |— 3.9 |.__...- 35.4 46 27.3 | — 3 50.3 |— 1.6 }...-..- 35. 4 48 18.0 | — 5 42.9 |+ 0.9 ]......- 36.0 4273004 12-— 1010057) |=—" 18 2 Rae 37.0 44 46.5 | — 2 08.6 |— 1.1 ]..-... : 36.8 43 10.1 | — 0 33:7 |3- 1.9 |....... 38. 3 39 49 58.3 ' — 7 21.3 — 2.3 !...... 139 42 34.7 LATITUDE DETERMINATIONS. 233 Observations and computations—Continued. GEORGETOWN, COLORADO. Level. Corrections. No.of | Microm. Half-sum of : Date. | star. readings. Remarks. declination. Micron ; eisai: N. Ss andirath Level. | Merid. 1873. t. ad. d. d. fo} ‘ “a / a“ “ “ (o} 4 i“ June 27} 6724 7 83.2 || 17.3) | 1950 6737 | 13 28.5 | 17.2 | 19.2 39 39 49.7 | + 2 49.3 |— 1.0 |..--.. .| 39 42 38.0 6762 7 78.6 | 14.8 | 22.0 6784 | 12 17.0 | 21.0] 16.0 44 52.4 | — 2 16.1 |— 0.6 }-..--...- 35.7 6856 | 11 10.8 } 19.6 } 17.0 6879 6 38.7 | 12.2 | 24.0 45 06.2 | — 2 26.3 |— 2.5 |...-- : 37.4 7037 5 85.4 | 22.0 | 15.0 7079 | 12 73.6] 8.0 | 28.8 | Dpl. med. 39 07.5 | -+ 3 33.7 |— 3.8 |-.--. -. 37.4 7114 5 82.5 | 14.0 | 23.0 7167 | 13 64.7 | 18.0 | 19.3 38 38.8 | + 4 02.9 |— 2.8 ]...-... 38.9 7211 8 52.2] 18.0 | 19.3 7258 7 96.1 | 22.0 | 16.0 42 53.9 | +- 0 17.4 |4- 1,3 |...-... 37.8 7333 | 12 02.0 | 18.2 | 19.3 7373 5 90.6 | 10.0 | 28.0 45 49.8 | — 3 09.9 |— 5.2 |..-..... 34.7 7402 | 11 43.6 | 18.0 | 20.0 7453 5 33.8 | 16.7 | 21.0 45 49.1 | — 3 09.4 |— 1.7 }..--... 33.0 July 1-..} . 5842 452.1 | 27.0 | 15.1 5871 | 15 17.0 | 14.3 | 28.0 48 07.9 | — 5 30.8 |— 0.5 |...-..- 36. 6 5911 4 54.3 | 22.2 | 20.1 5962 | 15 53.0 | 10.0 | 33.0 36 57.9 | +- 5 43.3 |— 5.7 |-..--... 35.5 Herc.| 13 79.1] 19.9 | 24.9 y Drae.| 6 67.2 | 14.5 | 29.0 39 00.6 | + 3 41.1 |— 5.1 |..-.--. 36.6 6184 | 10 67.8 | 22.3 | 21.0 6241 8 5155) |) 16539) 27.3 43 46.2 | — 1 07.2 |— 2.7 |..--... 36.3 6349} 3 26.9 | 19.0 | 25.5 | 6364 | 14 28.0 | 24.2 | 20.1 48 19.1 | — 5 42.0 |— 0.7 |..--... 36. 4 6426 | 11 18.4 | 22.0 | 22.9 42 38.6 | + 0 02.2 |— 4.9 |...-..- 35.9 6480 6 98.0 | 22.0 | 23.0 44 47.7 | — 2 08.3 |— 4.9 |..--... 34.5 6520 } 11 11.2] 14.0 | 31.0 6583 } 10°11.0 | 22.3 | 21.9 6602 9 13.9 | 14.0 | 30.3 43 11.3 | — 0 30.2 |— 4.4 |...--. 36.7 6629 | 17 52.1 | 25.8 | 18.0 6642 3 25.0 | 15.6 | 29.1 AES | tay 2302) \|— ete Al eee eee 34.8 6724 | 12 26.2] £9.3] 14.0 6737 6°9356))/ 1751) 2759 39 50.9 | + 2 45.4 |-+- 0.7 |_...... 37.0 6762-) 7 41.3 | 19.7 | 25.0 6824 | 11 83.0 | 23.2 | 22.0 39 44 53.6 | — 2.17.2 I— 1.1 |.----.. 39 42 35.3 234 ASTRONOMY. Observations and computations—Continuea. GEORGETOWN, COLORADO. Level. Corrections. No. of | Microm. os Half-sum of 4 Date. | ‘star. readings. Remarks. declination. Mora, : Latitude. N. Ss. ail oee, Level. | Merid. 1873. t. d. d. d. i “ “ “ul fo} fT “a July 1..| 7037 ESS |) Bhat || le 7 7079 | 12 25.6 | 27.0 | 18.0 39 39 08.6 | + 3 25.0 |4 2.9 |..---. .] 39 4256.5 7114 6 12.9. | 20.0 | 25.0 7167 | 13 73.5 | 26.0 | 19.0 38 40.1 | + 3 56.2 |+ 0.6 |.------ 36.9 7211 9 09.2 | 23.9 ]°21.8 7258 8 47.4 | 25.1 | 20.2 427155.0) || — 0 19,2) |=, 159) c= eae 37.7 7333 | 12 70.1 | 23.5 | 21.8 7373 6 58.8 | 11.3 | 34.0 45 51.0: | — 3 09.9 |— 5.8 |}.------ 35,5} 7402 | 12 17.4 | 24.0 | 21.2 7453 6 02.1 | 15.0 | 30.3 45 50.3 | — 3 11.1 |— 3.4 |------. 30.8 7465 5 9157 || 19.2 | 25.8 7496 | 13 31.0 | 18.0 | 27.3 46 28.8 | — 3 49.6 |— 4.4 |.-.---.- 34.8 July 2..| 5763 5 20.8 | 27.9 | 20.2 5775 | 14 58.1 | 22.9 | 25.2 47 25.9 | — 4 €1.1 |4 1.5 |-.------ 36.3 5642 3 22.7 | 25.0 | 23.0 5871 | 13 92.2 | 22.2 | 26.0 48 08.2 | — 5 32.2 |— 0.5 |-----.- SH) 5911 NTIS? RzGze |) PISS) 5962 | 15 00.0 | 20.3 | 27.7 36 58.1 | + 5 37.8 OS0 se aeee 35.9 “Here. 13 29.6 | 30.5 | 17.5 yDrac.| 6 34.9 | 17.0 | 31.8 39 00.9 | + 3 35.8 |— 0.5 |------- 36. 2 6184 | 10 62.7 | 29.0 | 19.5 6241 8 31.8 | 19.9 | 28.6 43 46.5 | — 1 11.7 |+ 0.2 |-.------ 35. 0 6349 3) UOS7/ || Bib || 2760 6364 | 14 20.7 | 26.5 | 21.7 48 19.5 | — 5 44.8 |— 0.2 |.----.- 34.5 6426 | 10 59.1 | 20.0 | 28.5 42 38.8 | — 0 03.4 |+ 0.3 |.------ 30. 7 6480 6 41.9 | 21.0 | 27.7 44 47.9 | — 2 13.0 |+ 0.8 |.----.- 30. 7 6520 | 10 70.2 | 29.3 | 19.6 6583 | 10 03.1 | 23.0 | 25.3 6602 8 83.7 | 25.2 | 23.0 43 11.6 | — 0 37.1 O50) esses = 34.5 6629 17 16.0 | 19.0 | 29.3 : 6642 2 91.2 | 27.8 | 21.0 49 59.7 | — 7 22.5 |— 1.0 |------- 36.2 6724 } 12 09.4 | 24.0 | 25.0 6737 6 81.4 | 26.3 | 22.8 39 51.2 | + 2 44 0 |4 0.7 | ----.- 35.9 6762 6 60.8 | 18.0 | 31.3 6824 | 11 06.9 | 32.0 | 17.0 44 53.9 | — 2 18.6 J+ 0.5 |..--... 35.8 7114 6 13.7 | 21.0 | 29.0 7167 13 74.0 | 29.0 | 21.0 38 40.4 | + 3 56.2 O50) |2=s-eee 36.6 7211 8 95.2 | 26.3 | 24.0 7258 8 32.3 | 26.0 | 24.3 39 42 55.3 | — 0 19.5 |-E 1.1 [-----.- 39 42 36.9 LATITUDE DETERMINATIONS. 235 Observations and computations—Continued. GEORGETOWN, COLORADO. Level. Corrections. No.of | Microm. * Half-suin of z Date. | star. readings. Remarks. declination. MGcraTn Latitude. N. S and Gr. Level. | Merid. 1873. t ad. d. d. fo} i “a ‘ MW a“ “ fo) / “ July 2..| 7333) 12 50.0 | 21.0 | 29.0 7373 6 28.1 | 26.3 | 24.0 39145 51.3 | — 3 13.2 |— 1.5 |._--.. - 39 42 36.6 7402 11 94.9 | 13.8 | 37.0 7453 5 70.2 | 35.0 | 15.0 45 50.6 | — 3 14.0 |— 0.9 | ---- BAY) 7465 5 23.3 | 19.4 } 31.2 7496 122 Fish) |} GH @) |) TEL Z 46 29.1 | — 3 54.7 |— 0.2 |-----. 34, 2 7545 44.9 | 25.0 | 25.3 7585 12 78.0 | 26.0 | 24.3 38 17.5 | + 4 18.8 |4 0.4 | ----.- 36.7 7606 0 84.3 | 26.0 | 24.0 7658 17 89.2 | 25.0 | 25.6 51 25.7 | — 8 49.5 |+ 0.4 |..---.. 36.6 7679 2 53.5 | 23.0 | 27.4 | Very faint. 39 27.2 | + 3 10.4 |— 2.2 |._---.- 35.4 7743 | 14 36.0 | 24.3 | 26.0 45 2.6 | — 2 56.9 |— 1.4 |.----.. 37.3 7777 8 66.5 | 23.5 | 27.0 7798 | 13 07.0 | 27.9 | 23.0 7815 5) 0583 |) PEE) eto 38 26.8 4 09.0 |+ 0.3 |..---.- 36.1 7F24 () B61! |) BBEO |) 27633 37 34.0 | + 5 02.0 |— 0.6 |.-.--..- 35.4 7888 16 76.8 | 26.0 | 24.6 45 56.5 | — 3 21.1 [4 0.9 }..---. a 36.3 7914 | 10 29.5 | 26.3 | 24.3 7943 9 59.7 | 24.3 | 26.0 7963 9 39.2 | 29.0 | 21.4 42 26.2 | +- 0 06.4 |-+ 1.6 |-----.- 34, 2 July 4..} 5463 3 85.3 | 14.0 | 37.0 5434 13 74.2 | 32.8 | 12.0 37 27.9 | + 5 07.2 |4- 0.8 |.....-- 35.9 5702 | 15 63.3 | 18.5 | 33.0 5717 3 J5) 10) 7 S440) LeS: 36 07.1 | +- 6 27.7 |+ 1.0 }.----.- 35.8 763 5 51.6 | 28.8 | 23.0 57715 15 04.0 } 37.3 | 14.5 47 26.3 | — 4 55.8 |+ 7.8 |------- 38.3 5e42| 395.8 | 23.9 | 28.2 5871 14 88.7 | 39.6 | 12.5 48 08.7 | — 5 39.4 |+ 6.2 |.--...- BoB) 5911 3 36.577 19.0 | 33.3 5962 | 14 07.0] 41.8 | 10.6 36 58.6 | ++ 5 32.5 |+ 4.7 |-.------ 35.8 uz Here| 13 21.6 | 26.0 | 26.5 y Drac.| 6 44.2 | 37.7 | 15.0 SH) Mi: pte Bh BOA |B Geil |pehese 37.9 6114 | 12 05.9 | 28.7 | 24.0 6123 6 78.8 | 30.5 | 22.2 45 15.5 | — 2 43.6 |+ 3.6 |------. 35, € 6184 | 1093.1 | 25.4 | 15.0 6241 8 47.2 | 23.8 | 16.7 43 47.1 | — 1 16.4 |+ 4.8 ].---.- 35 5 6349 3 49.8 | 20.0 8.4 6364 14 74.2) | 17.2. |) 13.2 39 48 20.1 | — 5 49.2 |4 4.8 |.-....- 39 42 35.7 236 ASTRONOMY. Observations and computations—-Continued. GEORGETOWN, COLORADO. Level. Corrections. No. of | Microm. E Half-sum of : Date. star. | readings. Remarks. declination. tesa : Latitude. N. Ss anil Wa Level. | Merid. 1873. t. d. d. d. fe} ‘ a“ ‘ “ a“ fo} *} a“ July 4..] 6426} 11 46.8} 19.3 | 29.3 39 42 39.5 | — 0 07.4 |4 4.0 |.-....- 39 42 36.1 6480 7 27.4 | 21.8 | 27.8 44 48.6 | — 2 17.6 |4 5.1 }.-.-..- 36. 1 6520 | 11 70.6 | 37.0 | 12.5 6583 10 35.9 | 24.7 | 24.7 6602 9 04.8 | 37.7 | 11.7 43 12.2 | — 0 40.7 |4+ 7.1 }..---.- 38. 6 6724 | 11 87.2] 31.0 | 18.6 6737 6 74.1 | 31.0 | 18.6 39 51.7 | + 2 39.4 |4- 6.8 |...---- 37.9 6762 6 78.6 | 18.0 | 31.9 6824 | 11 54.3 | 47.2] 2.3 44 54.6 | — 2 27.8 |+ 8.5 |..--.-.- ose 6856 | 11 94.9 | 33.0 | 17.0 6879 6 88.8 | 24.7 | 25.8 45 08.4 | — 2 37.2 |4- 4.1 |.----- 35. 3 7037 6 17.0 | 25.3 | 25.0 7079 | 13 03.0 | 12.0 | 38.3 BCG || SE NR} SBE Ib —— AD | ease 35.4 7114 5 46.9 | 25.7 | 24.5 7167 | 13 31.0] 8.0 | 42.2 38 41.1] + 4 03.5 |— 9.1 35.5 7211 9 00.9 | 24.0 | 26.0 7258 8 62.9 | 12.0 | 37.9 42 55.9 | — 0 11.8 |— 7.7 }..---.- 36, 4 7333 | 12 33.6 | 19.0 | 31.0 7373 6 09.4 | 30.0 | 20.0 45 51.9 | — 3 13.9 |— 0.6 J-..-..- 37.4 7402 | 11 75.2 | 25.8 | 24.0 7453 5 55.2 | 18.0 | 31.8 45 51.3 | — 3 12.6 |— 3.3 |-----.- 35.4 7465 5 75.7 | 22.0 | 27.8 7496 | 13 21.2 | 24.5 | 25.0 46 29.7 | — 3 51.6 |— 1.7 ]-----.- 36. 4 7545 4 32.7 | 26.5 | 23.3 7585 | 12 62.5 | 19.8 | 29.4 38 18.1] + 4 22.1 |— 1.7 |..---.. 38.5 7606 |— 0 11.8 | 31.0] 18.5 7658 | 16 82.3] 15.0 | 33.8 51 26.3 | — 8 46.5 |— 1.7 }..----- 38.1 7679 2 89.0 } 22.0 | 28.0 39 27.7 | + 3 06.2 |4 3.4 ]..---.- 37.3 7743 | 14 80.0 | 21.0 | 29.0 45 36.2 | — 3 03.7 |4+ 2.9 |...--.- 35.4 T7177 8 88.5 || 33.8) || 15.3 7798 | 13 20.0 | 29.3 | 20.3 7315 5 05.5 | 14.0 | 36.0 38 27.4 36.8 7824 |— 0 01.9 | 21.8 | 28.0 37 34.5 36.8 7888 | 16 10.5 | 22.0 | 27.5 45 57.1 38.8 7914 9 74.2 | 26.0 | 23.0 7943 9 74.4 | 25.1 | 23.6 7963 9 46.4 | 22.5 | 26.2 42 26.7 | + 0 08.7 |— 0.6 |...--.- 34.8 July 5..| 7037 5 79.0 | 29.3 | 21.0 7079 12 24.1 | 35.0! 15.3 39 39 09.7! + 3 20.4 '4 7.7 !...-... 39 42 37.8 LATITUDE DETERMINATIONS—FINAL RESULT. 237 Observations and computations—Continued. GEORGETOWN, COLORADO. Level. Corrections. : No. of | Microm. Half-sum of F Date. star. | readings. Remarks. declination.| yr;orom. Latitude. N. s aati Level. | Merid. 1873. Us d. d. d. Cn “ ‘ “a “ “ Oo wf ‘ July 5..| 7114 6 62.3 | 24.3 | 26.0 7167 | 14 00.2 | 39.0] 11.6 39 38 41.4] + 3 49.2 |4 7.1 ]..---..- 39 42 37.7 7211 9 18.6 | 33.6 | 17.1 7258 8 31.0 | 36.0 | 14.7 42 56.2 | — 0 27.3 |410.3 |..---.- 39.2 7333 | 12 53.1 | 25.0 | 26.0 7373 6 37.2 | 14.3 | 37.0 45 52.3 | — 3 11.3 |— 6.5 |......- O4n0) 7402 | 12 12.4 | 17.5 | 34.0 7453 5 78.9 | 34.0 | 17.7 45 51.6 | — 3 16.8 ONO} eee 34.8 7465 5 19.3 | 25.0 | 26.8 7496 | 12 53.3 | 17.0 | 34.9 46 30.0 | — 3 48.0 |— 5.4 }..--..- 36. 6 7545 4 72.0 | 31.1} 21.0 7585 | 13 09.7 | 15.0 | 38.0 aay I 7606 0 38.3 | 26.0 | 27.0 7658 | 17 46.5 | 29.7 | 23.8 37.5 7679 2 81.6 | 22.0 | 31.9 38.9 7743 | 14 66.5 | 22.0 | 32.2 39.3 W777 8 88.3 | 36.0 | 17.0 7798 | 13 09.7 | 33.7 | 20.0 7815 4 97.0 | 14.0 | 39.8 38 27.7 | + 4 12.4 |— 3.3 |----.--..- 36. 8 7824 0 08.0 | 21.7 | 32.2 37 34.8 | + 5 03.3 |— 2.2 |..--... 35.9 7888 | 16 27.0 | 23.9 | 30.0 45 57.4 | — 3 19.6 |— 1.0 }...-..- 36.8 7914 9 84.5 | 28.3 | 25.7 7943 9 71.0 | 33.0 | 20.9 7963 9 35.5 | 18.3) 35.7 42 27.0 | + 0 11.0 |— 1.4 |..----- 36.6 8074 Bi2IRO) 27.16 1025: 0 8127 | 10 25. 15,2 | 37.5 39 41 36.6 | + 1 03.4 |— 5.4 |..---.. 39 42 34.6 ASTRONOMICAL CO-ORDINATES OF STATION AT GEORGETOWN, COLORADO. Adopting the longitude of Washington and Salt Lake City, as given in the report for Colorado Springs, the astronomical co-ordinates for station at Georgetown, Colorado, will be:— Longitude. .7 02™ 45°.84 or 105° 41! 27.60 west from Greenwich. ck 14 54™ 338.72 + 08.0036 or 28° 38/ 25.80 + 0.0.05 west from U. S. Naval . Observatory at Washington, D. C. LEMS 25 seeesesooosocdecaone . 89° 42/ 36.36 + 0.06 north. 238 ASTRONOMY. The probable error of one observation is derived from all results ob- tained more than three times, and is found to be --0’’.61; therefore the probable error of the final result will be 0.06. This must be combined with the probable error of the star-places used for the determination, in order to get the probable inaccuracy of the result. U. 8S. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN, 1st Linut. GEO. M. WHEELER, Cores oF ENGINEERS, U. 8S. ARMY, IN CHARGE. RESULTS OF OBSERVATIONS MADE BY DR. F, KAMPF AND JOHN H. CLARK IN THE DETERMINATION OF THE ASTRONOMICAL CO-ORDINATES OF HUGHES, COLORADO. SEASON OF 18738. COMPUTATIONS BY Dr. F. KAMPF anp JOHN H. CLARK. 239 HUGHES, COLORADO. GEOGRAPHICAL POSITION OF STATION. Longitude, . ... . . . 104° 48’ 58.80 + 0.06 west from Greenwich. Latitude,. ...... . 39959! 24.09 + 0/.0.03 north. Barometric altitude of observatory above sea-level, 5,021.6 feet. The astronomical station was equidistant from the Denver Pacific and Boulder Valley Railroads, about 135 feet from the track of each. South of the monument was the railway office, with which was combined the telegraph office; north of it were two frame houses; and in a north- east direction was the water-tank. These buildings constituted the station of Hughes, whose population, exclusive of the few laborers engaged upon repairs of track, numbered but seven persons. The neighboring country for a radius of about 15 miles is a very level plain, covered but sparsely with grass, and affording little inducement to the farmer. One-half of a mile from the station the Platte River flows ‘down the valley, but its water is impure and useful only as a means of irrigation. METEOROLOGICAL CONDITIONS. As a rule the weather was favorable for this work. Although it gen- erally became cloudy at four o’clock in the afternoon, it was clear again by eight or nine o’clock. The air was as quiet as could be desired, and the process of observation was more easy and successful than at the previ- ous station. Sometimes a heavy wind arose at night, but, the tent being closed as far as possible, it did not disturb the instrument materially. The following table gives the direction of the wind, the aspect of the sky, and other meteorological conditions attendant upon the occupation of this station: 16 ast 241 242 ASTRONOMY. Direction of the wind. Date. Remarks. 12 p.m. to | 8a.m.to4 | 4 p.m. to 8 a.m. pm. 12 p.m. 1873. Ani hg TRE pe eceerccce S.E. N. From 12 m. to 3 p. m., rain, thunder, and wind. 13 | - S.E. Ss. W. N. Clear. 14 N. S. W. Ss. From 4 to7 p. m., rain and storm. 15 S. N. Variable. | Lightning at 8 o’clock, in the north. 16 S. W. S. W. Ss. W. Do. 17 |S.and N.E.| S. andN. E. E. Lightning at 8 o’clock, in the south. 18 N. E. N.E. 8. E. Do. 19 N. W. Variable. | No wind. | Clear. 20 Ss. Variable. Ss. Do. : 21 Ss. 8. E. W. Rain at 8 p.m.; lightning in northwest, at 11 p.m. 22 Ss. 8. E. W. Very heavy rain end lightning in the afternoon. 23 S.E. 8. E. N.and §. E. Do. OBSERVATORY.—TELEGRAPHIC COMMUNICATION. The construction and arrangement of the observatory was the same as at Colorado Springs, a description of which is given in the astronomical report of 1874. Owing to the failure of the stonemason to provide the monument at the specified time it became necessary to erect a temporary pile of bricks to answer that purpose. In the following September this was replaced by a permanent monument of the prevailing design. The northern meridian mark was fixed on a stable 280 feet from the station. Denver and Cheyenne are connected by two wires of the Western Union Telegraph Company. The lower one of these was conducted into the tent by means of a loop. It was impossible to procure a suitable tele- graph pole to lift the wire out of the way of accident, and, in spite of all precautions used, it was swept away by a passing wagon one day, much to the vexation of the astronomer and the delay of his work. In the trans- mission of signals able assistance was rendered by Mr. R. Bush, in charge of the Hughes telegraph office. Thanks are also due to the operators at Denver and Cheyenne for their liberality in surrendering their wires to the uses of this work as often as they could be spared. INSTRUMENTS.— VALUES.— BATTERY. The astronomical and meteorological instruments, with the values per- taining to them, were the same as at Colorado Springs, described in the INSTRUMENTS.—VALUES.—BATTERY. 243 report on that station. The length of circuit, Hughes to Salt Lake City, via Corinne, is about 650 miles. The battery employed was the private property of the astronomer. It was composed of two Grove cells, very powerful in their action, which were re-inforced by a repeater at Cheyenne and another at Corinne. CONNECTIONS.—OBSERVERS.—COMPUTERS. The astronomical work at Hughes was conducted by Dr. F. Kampf. Exchanges for time were made with Mr. John H. Clark at Salt Lake City on July 12, 17, 18,and 19 Observations for latitude were made J uly 16, 18, 19, 20, 21, and 23. Each astronomer performed the computations to accompany his own work. 244 ASTRONOMY. Tabuiation of stars used for determination of time at Hughes, Colorado, and Salt Lake City, Utah. HUGHES, COLORADO. SALT LAKE CITY, UTAH. 7 Name of star. | 3 July 15. July 16. | July 18. July 14 July 16. July 17 July 18 July 19 S| a 8 = i=} fo} Ler} et oo a iS) ¢ SE 77) i ‘ ' ' ‘ H ‘ ‘ H ' H ‘ ' ' ‘ 5 ‘ ' ‘ ‘ : ' ' ‘ ‘ t Fi ‘ ‘ 7 : : x i ' H ' ' ' ‘ H 7 ‘ ' ‘ ne} ~Ewe q A 8 ‘es En o S z. x x ITD) a cooweo cosaenecouaasa pase Serle Coron; eee eee ee eee Pepa asesiiboae lie Sic mee ABI™*PVWIarie eR SESE SOE a Seto x! SP a x! xxxxX x oF x nasa ce oe xx! x xxx! ‘xxx 1xxx! xxx ' ‘ ‘ ' 1X ph is oy ea 5 8 ‘ ‘ ' t H ' ' ' ' : 0 t ' : A ‘ ‘ ‘ ' ' 1 F ' t ji i H ‘ t ‘ ' 7 ' : ' , ' i i WX RS Is! 4 na o ' ' ' ' . ‘ ‘ . ' ' ' ' . ' ' ‘ ' . ' ' ' ‘ . ‘ ‘ ' ' ' ' ’ ' ' YX OT o = . 5 ° lo) i} a ‘ ' ' ' ' ‘ ' ' ' ' ' ' ‘ ' ' ' ' IMI sooces csasass6s0 see0 05es05 a5a0|[soee|fe5 =s|/s522)]s25))/- XKXKKKXKXKX XKKKXKXK 1 Xx! ‘ ’ OK NGS a5s560.s850 Soop aces cgs5s6 seal eee ea eae cose SETA. cog sono cece ssoceSesa|fsocsllossc|ecos|jeocs||oes a of x Pe OSA Q) IDMNGOANE ce smos Ssonsesessoq5950 soeo|[sosc||sosol|os- BEA ease Bae =s|| SS saclisane)|oso5 @ IDA@ONIS saccco onesce eroseasese Sad5||ssc|saco]|-ces Feo eaen oes oes SSE Bxsa cael lane aos! ane @ Aquile---------- oe. ee SE |losce|[s304)|asce|ecsajloose|ls oa|leawalls = ell Sete eel Serer | eeecee, Pp JAG WHE can coo cece Stoo ssaecass SS [osc] [soss||secs|l-5 s5llecce|lscec] ke solfose #|tecs Seea|eeec|ancs)ece= ie OLN ssscossssassesesecesesos D4 esse pets eal ecoe| ere eo.a5| Seed lems eo By eee ones) ees) Ses qe (CM MOOO I Ssoonscssfeass s5oss5 54a see) [earl eeese4 (Seis! lone) aoc focal Serta [asec Be feos seer eso) eau & Dei .--sosssesecsscss5ssee Si Goss|lesics| aoco|lesasllece 2 Be laos] ase oe 2a Essel een Groombr3 24) eens eee | SR lasoa esee||SSSalleaas| Se Sal PEs oc| eos) sscs||= a Cyepni-.------.--.--..--. .----- 5 |Bees||eonelesa|Sses) bs asibesela-sa|lsase|[bose aeos Ph INO — sen cosa cece tessos ease |eso2||s568)[e5se|-55-||4655|[-e5-]/-2 =-|)2-5 Beles TPE MO (Ch ees oececoSassose Cho. = [eres | ool Sere eee | eens | oes | eee TIME DETERMINATIONS. Observations and reductions for time taken at sending station. HUGHES, COLORADO, JULY 12, 1873. ry g Name of star. T. Aa. Bb. Ce. 7’. AR. fats 3 hm 8. Ss. ch 8. hem. 8, hom. 8. MM. 4S: Wai| es Coronmeeeeeaces: 16 02 37.06 |— 0.61 |— 0.18 |— 1.80 |16 02 34, 47 |15 52 21.66 | — 10 12,81 Wins |) GE Sconpiiesseee sce 08 22.19 |— 2,23 |— 0.07 |H 1.67 08 18, 22 58 05, 11 13.11 Ww. Groombr. 2320 ... 16 16.27 |+ 3.09 |— 0.26 |— 4.25 16 14.85 |16 UG 01.75 13. 10 Walla blorculisss serene 26 12.72 |+ 0.42 |-— 0.16 |— 2.29 26 10. 69 15 57.38 13.31 Bin | 2 SCORDI seas ee 16 31 53.54 I— 2.50 |— 0.10 4 1.75 116 31 52.69 116 21 39.47 | — 10 13.22 Mean\ ati 6! 0S™iocalisidercalittimos- cae 9-22 sees noes 2c Josie nein cae eee ee — 10 13.11 NORMAL EQUATIONS. 0=-+ 5.64 + 5.00 dt + 0.75a— 5.23¢ dt = + 08.39 O= + 2.48 + 0.75 6¢+3.55a-+ 3.50¢ a = — 28,45 0=— 7.02 — 5.23 dt + 3.50 a + 12.99 ¢ c=-+ 1558 HUGHES, COLORADO, JULY 12, 1873. a I Name of star. a Aa. Bb. Ce. Te AR. AT. Ss - hm. 8. 8. i 8. hom 8 hams 8: Ma 8s By) || (om Aquileses...c-sse 19 54 50.60 |— 0.38 |— 0.28 |+ 1.85 |19 54 50.79 |19 44 37.35 | — 10 13.44 E.| e Draconis ........ 58 44.58 |+ 3.81 |— 6.91 |+ 5.30 58 52.78 48 38.85 13. 93 Bea Aquiles:= =... 222 20 08 11.80 |— 1.43 |— 0.30 |4+ 1.83 |20 08 11.90 57 58.28 13. 62 Be || « ‘Cephel---. <2 55-2 23 11.81 |+ 7.17 |— 1.37 |+ 8.26 23 25.87 |20 13 11.98 13. 89 E. | « Capricorni ..--.. 30 19.59 |— 2.32 |— 0.12 |4 1.91 30 19.06 20 05. 40 13. 66 W.| e Delphini --.--.-- 37 27.37 |— 1.28 |— 0.17 |— 1.85 37 24.07 27 10.7 13. 30 W. Groombr. 3241 -.. 40 51.09 |+ 4.51 |— 0.52 |— 5.92 40 49. 16 30 35.73 13. 43 W.|@) Cygnils.osss--2- 47 24.07 |+ 0.31 |— 0.23 |— 2.56 47 21.54 37 08. 29 13. 25 We} 2 Aquariin 2-25-25: 56 07.73 |— 2.01 |— 0.15 |— 1.85 56 03.72 45 50, 33 13. 39 Wail 12) VC 1879) Se - eee 21 03 36.51 I+ 9.72 |— 1.01 1-10.55 [21 03 34.67 |20 53 21.58 | — 10 13.09 Meansat, 205: 20mlocalisidenealltimesca=soss- cee ste s see acseesee ss -koc-cccsece — 10 13.50 NORMAL EQUATIONS. O0=— 28.52-+ 10.00 dt¢— 6.56a— 1.97 ¢ dt = + 18.50 0=+ 64.13— 6,56 dt + 28.80 a+ 11.45 ¢ a=— 2.61 O=—114.03— 1.97 dt+ 11.45 a + 80.85 ¢ e—-+ 15.82 246 ASTRONOMY. Observations and reductions for time taken at sending station—Continued. HUGHES, COLORADO, JULY 13, 1873. a I Name of star. Te Aa. Bb. Ce. Te AR. AT. 5 hava. 118: 8. 8. 8. hm. 8. hem. 8: hem 8. W.| ec Serpentis ..----- 15 54 45.54 |— 0.32 |— 0.03 |— 1.64 |15 54 43.55 |15 44 30.88 | — 10 12.67 W.| « Coroneg .--..-----|16 02 36.20 |— 0.14 |— 0.02 |— 1.85 |16 02 34.19 52 21.64 12, 55 W. Groombr. 2320--..| 16 18.28 |+ 0.70 |— 0.05 |— 4.36 16 14.57 |16 06 01.73 12, 84 W.| 6 Ophiuchi-.-.-.--.... 17 58.14 |— 0.38 |— 0.01 |— 1.64 17 56.11 07 43.27 12.84 By | ae ScOnpilee= =e ieee 31 51.17 |— 0.57 |— 0.15 |++ 1.80 31 52.25 21 39. 47 12.78 E. | A Draconis -- 38 25.21 |+ 0.75 |— 0.34 |+ 4.53 38 30.15 28 17.60 12. 55 E. | 7 Herculis -- -| 48 45,48 |— 0.02 |— 0.18 |+ 2.09 48 47.37 38 34.57 12, 80 E. | « Ophiuchi-.. .-.--. 17 01 53.01 |— 0.28 |— 0.15 |+ 1.65 |17 01 54.23 51 41.33 12.90 E. | « Urse Minoris..-.|17 09 09.70 |4+ 2.77 |— 1.04 |+12. 02 [17 09 23.45 1/16 59 10.65 | — 10 12.80 Meanvati16222™ local sidereal time ---2.-)--) eee eee eae ee eee — 10 12.75 NORMAL EQUATIONS. =— 26.38-+ 9.00 d¢— 4.5la+ 7.77¢ dt = + 15.95 O=-+ 82.76 — 4.51 dt + 30.37 a — 37.14¢ a =— 03.56 0 = — 155.57 + 7.77 ot — 37.14 a +. 77.20 c =-+ 18.62 HUGHES, COLORADO, JULY 15, 1873. I Name of star. T. Aa. Bb. Ce. AME AR. AT. 5 Ae an. | 3: 8, 8. Ch Patt FS. \\Iis alse xe Mm. 8. W.| 5 Urs Minoris..-.|14 38 13.53 |— 3.02 |+ 0.13 |— 6.97 |14 33 03,67 |14 27 51.81 | — 10 11.86 Wi.| e Bootis)-<---- <.-- 49 40.80 |+ 0.30 |+ 0.03 |— 1.88 49 39.25 39 27.86 11.39 W.| 8 Urs Minoris.-...|15 01 28.64 |— 2.62 |+ 0.06 |— 6.28 |15 01 19.80 51 08. 62 11.18 Wiel Wis Boots) seeeeeiea == 29 56.51 |+ 0.05 |+ 0.03 |— 2.10 29 54.54 |15 19 43.28 11.26 E. |e Serpentis.----.-.-. 54 39.98 |-+ 0.70 |— 0.06 |+ 1.67 54 42.29 44 30.87 11.42 E. | ¢ Urs Minoris....| 58 49.73 |— 3.75 |— 0.23 |+ 8.09 58 53. 84 48 42,57 11.27 KB. | e Coronm’...-.-.-- 16 02 31.03 |4+ 0.30 |— 0.06 |4 1.89 |16 02 33.16 52 21.63 11.53 E. Groombr. 2320...) 16 10.68 |— 1.53 |— 0.12 |+ 4.45 16 13.48 |16 06 01, 64 11.84 E. | 6 Ophiuchi.----. .. 16 17 52.46 |+ 0.85 |— 0.04 [4 1.66 [16 17 54.91 |L6 07 43.26 | — 10 11.65 Mean \at/15518™ local (sidereal time =22c- .-- saetoeee ase e neem e se secs ae eeee eee =e 49 NORMAL EQUATIONS. 0O=— 22349.00 dt— 7.20a1+ 0.33 cl dt =+ 08,01 O=+ 6.52—7 20 dt4+23.00 a+ 1.35 ol a! = — 08.29 0=— 10.444 0.33 dt + 1.35 a'-+69.44 ol ct =+ 08.16 To avoid large numbers an azimuth of + 15.50 and an error of collimation of + 15.50 were adopted; therefore Caso c= + 15.66 TIME DETERMINATIONS. 247 Observations and reductions for time taken at sending station—Continued. HUGHES, COLORADO, JULY 16, 1873. rH I Name of star. te Aa. Bb. Ce. me AR. AT. 5 | hem. = 28: 8. bic 8. hm 8. hem. 8. M. 8 W.. |) @ Coron .......... 15 39 32.10 |— 0.11 |+ 0.07 |4+ 0.08 |15 39 32.14 |15 29 20.30 | — 10 11.84 W.| @ Serpentis -....... 48 14.36 |— 0.26 |+ 0.05 |+ 0.08 48 14.23 38 02, 41 11. 62 W.| ¢ Serpentis ........ 54 42.67 |— 0.27 |4+- 0.06 |+ 0.07 54 42,53 44 30.86 11. 67 W.| ¢ Ursx Minoris .... 58 51.95 |+ 1.41 | 0.35 |-L 0.37 58 54.08 48 42, 46 11. 62 Wi || ev Coronge.c2. 2.2. 16 02 33.13 |— 0,12 |+ 0.15 |+ 0.08 |16 02 33.24 52 21.61 11. 63 E. Groombr. 2320... 16 13.48 |-+ 0.58 |— 0.14 |— 0.20 16 13.72 |16 06 01.59 12.13 E. | + Herenlis .. 26 09.10 |— 0.08 |— 0.07 |— 0.11 26 08, 84 15 57. 32 11. 52. E. | @ Seorpii-..-.. 31 51.74 |— 0.47 |— 0.02 |— 0.08 31 51.17 21 39. 45 11.72 KB. | A Draconis......... 38 28.44 |+ 0.63 |— 0.02 |— 0.21 38 28.84 23 17.43 11.36 E. | ¢ Ophinehi-.--..... 16 40 23.87 |I— 0.36 0.00 |\— 0.07 |16 40 23.44 |16 30 11.95 | — 10 11.49 Meanraiples G02 oval praerealitimessacicsse< 2c osccs ci ceee eee caee oxic enacts — 10 11.68 NORMAL EQUATIONS. 0=- 0.04 +- 10.00 dE— 2.06a— 0.21¢ df= — 08.10 O=+7.39— 2.06d¢+15.0la+ 8.42¢ a—— 05.46 O=+7.53— 0.21dt-+ 842a-+4 48.880 c= — 08.07 HUGHES, COLORADO, JULY 17, 1873. I Name of star. in Aa. Bb. Ce. 1. AR. AT. 5 his Ms 8: 8. 8. 8. hm 8. ham. _ 78. Me 85 iW.) a@- Coron) .3--2. <-.c 15 39 31.69 |— 0.20 |— 0.03 |+ 0.22 /15 39 31.68 |15 29 20.29 | — 10 11.39 W. | @ Serpentis ..-..... 48 14.16 |— 0.45 |— 0.02 |4+ 0.20 48 13.89 38 02. 40 11.49 W.| e Serpentis .-....-- 54 42.54 |— 0.47 |— 0.02 |+ 0.20 54 42,25 44 30.85 11. 40 W.| ¢ Urs Minoris.-...-. 58 50.39 2.48 |— 0.16 |+ 0,97 58 53. 68 48 42.38 11.30 Wile Coronpi.se- ess oee 16 02 32.91 }— 0.20 |— 0.04 |+ 0,22 |16 02 32.89 52 21.60 11.29 E. Groombr. 2320--.- 16 12.76 |-+ 1.02 |— 0.23 |— 0.52 16 13.03 |16 06 01.55 11.48 Big |,oLO plhinghie sate a: 17 55.52 |— 0.55 |— 0.07 |— 0.19 17 54.71 07 43.24 11. 47 BS |) 7; lerculis) ssssee=" 26 08.98 |— 0.14 |— 0.14 |— 0.28 26 08. 42 15 57.30 11,12 Biss |p QS CORP Werwse aterm ae 31 51.76 |— 0.83 |— 0.05 |— 0,22 31 50. 66 21 39.44 11. 22 Bry pe. Ophinehiaesa-cscs 16 40 24.16 '— 0.63 '— 0.04 '— 0,20 116 40 23.29 116 30 11.94 | — 10 11.35 MeanrtatiGh 00 miloealssiderenlitim Om sa. tee-s-1)- ser ee eset ea rew amie coccrcne sce — 10 11.34 NORMAL EQUATIONS =— 0.02-+ 10.00 dt¢— 0.03a— 2.00¢ ét = — 08.04 =+13.61— 0.03 dt ++ 13.65 a + 12.87 ¢ a—— 03.81 =+18.59— 2,00 dt+ 12.87 4+ 42.106 c=— 03,20 248 ASTRONOMY. Observations and reductions for time taken at sending station—Continued. HUGHES, COLORADO, JULY 18, 1873. eI Name of star. a Aa. Bb. Ce. 1 AR. AT. 5 Whe ids — & 8. Be 8. he ans 68. hm. 3. Mm. 8. Wall tea Coroneieee eee 15 39 31.29 |+ 0.09 |+ 0.03 |+ 0.11 |15 39 31.52 |15 29 20.27 | — 10 11.25 W.| a Serpentis... .-.. 48 13.39 |+ 0.20 |+ 0.02 |+ 0.10 48 13.71 38 02.39 11. 32 W.| e Serpentis---..-.-- 54 41,77 |+ 0.21 |+ 0.02 |4+ 0.10 54 42.10 44 30.84 11. 26 W.|¢ Urs Minoris.--.| 58 54.27 |— 1.10 |4 0.04 |+ 0.50 58 53.71 48 42.29 11. 42 Waive: (Coron) eee -ee== 16 02 32.52 |+ 0.09 0.00 |+ 0.11 |16 02 32.72 52 21.59 11.13 BH. | 6 Ophiuchi-.------ 17 54.58 |-+ 0.25 |— 0.05 |— 0.10 17 54.68 |16 07 43.24 11. 44 E. | 7 Herculis --..--.- 26 09.15 |+ 0.06 |— 0.13 |— 0.15 26 08. 93 15 57.28 11. 65 EB. | @ Scorpii ---- 31 50.50 |-+ 0.37 |— 0.04 |— 0.11 31 50.72 21 39. 44 11. 28 E. | A Draconis .- 38 29,75 |\— 0.49 |— 0.29 |— 0.28 38 28. 69 28 17. 40 11.29 KE. | € Ophiuchi..-....-- 40 23.16 |-+ 0.28 |— 0.08 |— 0.10 40 23.26 20 11.94 11. 32 E. | ¢ Urs Minoris--..|17 09 24.94 |— 1.81 |— 1.04 |— 0.74 |17 09 21.35 |16 59 10.06 | — 10 11.29 Mean at 16200™ local sidereal time\es] ==. soe eae ee ee ae — 10 11.338 NORMAL EQUATIONS. o=— 0.98-+ 11.00 dt— 5.10a+ 5.51¢ ot = -+ 08.31 0 = — 14.97 — 5.10 dt + 38.68 a — 24.41 ¢ a= -+ 05.36 0O=+16.97 + 5.51 dt — 24.41 a + 97.55 ¢ c=— 02.10 HUGHES, COLORADO, JULY 19, 1873. ZA 5 Name of star. T. Aa. Bb. Ce. T’. AR. AT. tS) [Pm do Sb 8. 8. 8. le ds Rie Ms | 18 Mm. 8. 196 |) (Clk?) S5edoeoe 15 39 31.86 |— 0.23 |— 0.07 |— 0.16 15 39 31.40 |15 29 20.26 | — 10 11.14 E. | « Serpentis..---.-- 54 42.70 |— 0.55 |— 0.06 |— 0.15 54 41,94 44 30.83 11.11 E. | ¢ Ursxw Minoris---. 58 51.79 |-+ 2.85 |— 0.39 |— 0.72 58 53.53 48 42.20 11.33 Ww. Groombr. 2320. ..|16 16 11.44 |+ 1.18 |— 0.16 |+ 0.39 |16 16 12.85 |16 06 01.47 11.38 W.| 6 Ophiuchi.--.--.--. 17 55.26 |— 0.64 |— 0.05 |+ 0.15 17 54.72 07 43.23 11.49 W.|7 Herculis.-. -.--.-. 26 08.49 |— 0.16 |— 0.17 |4+ 0.21 26 08. 37 15 57.26 11.11 Wailten scorpile------ 5 31 51.35 |— 0.96 |— 0.07 |+ 0.16 31 50. 48 21 39.43 11.05 W.| A Draconis -.-.---- 38 27.33 |+ 1.27 |— 0.50 |+ 0.40 38 28.50 23 17.36 11.14 W.| ¢ Ophiuchi-.-..-..-. 16 40 24.00 |— 0.72 I— 0.14 I+ 0.15 116 40 23.29 116 30 11.93 | — 10 11.36 Mean at 175 00™ local’ sidereal time -----. -- ------ 2. ee — 10 11.23 NORMAL EQUATIONS. O=-+ 0.10 49.00 d¢— 2.18a— 2.94¢ dt = — 08.28 0=+ 11.8) — 2.18 dt+15.1la— 9.94¢ a=— 08.94 O=— B28 —294 dt— 9.94 a+ 47.566 c= — 08.15 TIME DETERMINATIONS. 249 Observations and reductions for time taken at sending station—Continued. HUGHES, COLORADO, JULY 20, 1873. Yi g Name of star. ie. Aa. Bb. Ce. ie AR. AT. Ss lip Vitey 8. 8. 8. hom & eM 8 mM. & E. | a@ Serpentis........ 15 47 13.14 |— 0.15 -— 0.06 |— 0.20 |15 47 12.73 |15 37 02.57 | — 10 10.26 E. | ¢ Serpentis........ 54 41.93 |— 0.16 |— 0.06 |— 0.20 54 41.51 44 30,82 10. 69 EK. | ¢ Ursz Minoris .... 58 53.17 |-+ 0.62 |— 0.31 |— 0.98 58 52.70 48 42.09 10. 61 |e, (Coron@ s--.<--<. 16 02 32.57 |— 0.07 |— 0.09 |— 0,22 |16 02 32.19 by PailsBy/ 10. 62 Be) BP Scorpiti-ss---sose 08 16.40 |— 0.25 |— 0.04 |— 0.21 08 15.90 58 05. 05 10. 85 W. Groombr. 2320 -. 16 11.58 |+ 0.34 |— 0.21 |+ 0.53 16 12.24 |16 06 01.41 10. 83 W.|'0 Ophiuchi---- -.-2 17 54.11 |— 0.18 |— 0.06 |+ 0.20 17 54, 07 07 43. 23 10. 84 Wiliam rlercolistscese ee 26 07.63 |— 0.05 0.00 |-++ 0.29 26 07.87 15 57.24 10. 63 Wa |k@e Scorpiiers see nee 31 50.30 |— 0.28 |— 0.01 |+ 0,22 31 50. 23 21 39. 42 10. 81 W.| A Draconis. -| 38 26.76 |+ 0.38 |— 0.07 |+ 0.56 38 27.63 28 17.30 10.33 WailG Ophineht==----—- 16 40 22.76 |— 0.21 |— 0.02 |+ 0.20 /16 40 22.73 [16 30 11.92 | — 10 10.81 Meaniath6%00™ locallsiderealitimercoc.sss-2 sce ce se enee er acee Gene ececcoeeeeet — 10 10.67 NORMAL EQUATIONS. 0=—0.77 +. 11.00 dt— 0.71a— 0.85e ot = -+ 08,04 0=—+2.72— 0.71dt+16.24a— 8.41¢ a= — 08.27 0O=+7.47— 0.85 dt— 8.41a+ 49.75 ¢ c=— 05.20 HUGHES, COLORADO, JULY 20, 1873. = EI Name of star. T: Aa. Bb. Ce. Ee AR. AE: 3 Namie * 28% 8. 8. 8. hem. 3. ie fit ee W.| « Ophiuchi-.....-.. 17 O1 52.09 |— 0.22 |— 0.04 |4+ 0.26 |17 01 52.09 |16 51 41.28 | — 10 10.81 W.| ¢ Urs Miuoris .... 09 16.87 |+ 2.11 |— 0.27 |4 1.90 09 20.61 59 09. 80 10. 81 Wai|palberculiseesses soe 19 04.18 |— 0.19 |— 0.05 |+ 0.27 19 04.21 }17 28 53. 36 10. 85 W.| 44 Ophiuchi.-.-.. .. 28 50.28 |— 0.41 |— 0.04 |+ 0.28 28 50.11 18 39.21 10. 90 Es || 8) Draconis::2=--..-- 37 47.58 |+ 0.15 I— 0.13 I— 0, 42 7 47.18 27 36.07 ryan BR. | (a Ophiuehi-------- 39 15.76 |— 0.20 |— 0.22 |— 0.26 39 15.08 29 04, 37 10.71 Biltoy Draconis... se. 47 56.38 |+ 0.57 |— 0.46 |— 0.71 47 55.78 37 44.96 10. 82 E. | « Hereulis ........| 51 42.61 |— 0.10 |— 0.19 |— 0.29 51 42.03 41 31.35 10. 68 B. | 1! Draconis .......- 17 54 26.95 |-+ 0.74 |— 0.48 |— 0.84 |17 54 26.37 |17 44 15.57 | — 10 10.80 Mean at 174 18™ Jocal sidereal time....-......--. aceees Ba walt ae eee seroe eehes -++ 10 10.83 NORMAL EQUATIONS. O=— 2.33+ 9.00 dt— 5.78 a— 0.72¢ dl =— 08.03 0 = -+ 19.66 — 5.78 dt — 31.45 a + 25.59 ¢ a= — 03.42 0 =-+ 31.70 — 0.72 dt + 25.59 a + 81.63 ¢ c=— 08,26 250 ASTRONOMY. Observations and reductions for time taken at sending station—Continued. HUGHES, COLORADO, JULY 21, 1878. EI Name of star. re Aa. Bb. Ce. mye AR. AT. 5 lin ile ~ is 8. 8. h. ™. ~ 8. lite Gide Mm. (8. BE. | # Sagittarii ....-../18 16 23.42 |— 0.68 |— 0.07 |— 0.24 /18 16 22. 43 /18 06 12.52 | — 10 09.91 E. | 6 Urse Minoris-... 23 38.89 |+ 8.83 |— 1.62 |— 3.87 23 42.23 13 32.30 09. 93 Be) eeAquile es ce-— 38 30.77 |— 0.54 |— 0.05 |— 0.238 38 29.95 28 19.99 09. 96 IDp || 4 Ine) sss Sen oSas 42 50.80 |— 0.01 |— 0.06 |— 0.29 42 50. 44 42 40,52 09. 92 Will: Wiyxsses sue ee 55 35.28 |— 0.10 |+ 0.04 |-+ 0.27| 55 35.49] 45 25.63 09. 86 W. | 50 Draconis ....----. 19 00 38.79 |4+- 1.63 |+ 0.13 |+ 0.87 |19 00 41.42 50 31.58 09, 84 Walco eAquileaees ceca 09 46.39 |— 0.32 |+ 0.05 |-+ 0.238 09 46.35 59 36. 47 09. 88 W.| d Sagittarii -....-. 20 25.16 |— 0.69 |+ 0.03 |+ 0.24 20 24.74 10 14.71 10.03 Wire| LOMO TACOnIsies-e-ee 22 42.63 |+ 0.90 |+ 0.14 |+ 0.61 22 44,28 12 34.39 09. 89 W.| 7 Draconis ....-.-.-- 19 28 10.49 |+ 1.35 [+ 0.17 |+ 0.79 [19 28 12.80 [19 18 02.71 | — 10 10.09 Meaniat 184/42™'local'sidereall time ea-s-s)- ose oe ne nae eee seeiaeeeetaeaies — 10 09.93 NORMAL EQUATIONS. 0=-—-14.44-+ 10.00 d¢— 14.40a-+4+ 7.006 ol = ++ 08.57 0= + 82.44 — 14.40 dt + 163.16 a — 188.59 c a =— 08.72 0=— 64.91-++ 7.00 d¢ — 188.59 a + 326.81 ¢ e=— 03,23 Observations and reductions for time taken at sending station. SALT LAKE CITY, UTAH, JULY 12, 1873. 5 FI Name of star. Te Aa. Bb. Ce. ap AR. Ae S) hem. %8: 8. of 8. Tee a hom 8. hm. 8. 16 | SOOM ocascssss 7 45 44.41 |— 1.63 |+ 0.02 |+ 0.16 | 7 45 42.96 |15 52 51.44 |-+8 07 08.48 E. | 6! Scorpii-...-..--- 50 58.06 |—-1.56 |4+ 0.05 10.16 | 5056.71] 57 05.11 8. E. Groombr. 2320... 58 50.57 | 2.11 |+ 0.28 /-+ 0.40 58 538.36 |16 05 01.76 08. 40 106 |i talents) oa aSa6 8 08 48.26 |+- 0.26 |+ 0.30 |+ 0.22 | 8 08 49.04 15 57.37 68. 33 E. | 7 Draconis ....-.-. 15 08.64 |+ 1.29 |+ 0.45 |+ 0,32 15 10.70 22 19.15 08. 45 Beco @phiuchie=- 8 23 04.61 I— 1.34 |4+ 0.17 |4+ 0.15 | 8 23 04.59 116 30 11.96 |-+8 07 08.37 Mean\art 65:0 locall siderealitimes= anes e eee eee eee aise fee = alee tea +8 07 08.41 NORMAL EQUATIONS. + 6.00 dt + 0.52 a=-+ 1.56 dt—=-+ 08.41 -+ 0.52 dt -+ 4.52 a = — 7.46 a= — 15.697 TIME DETERMINATIONS. 251 Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, JULY 12, 1873. | Clamp. 444444 seeer Name of star. — Aa. Bb. Ce. the AR. AT. hom 8. oh 8. ung |[iter Aone Sei Vie Teena Ba fis ES. oe} 72 Ophiuchi ....-... 9 54 14,08 |— 1.00 [4 0,14 |+ 0.11 | 9 54 13.33 |18 01 21.80 |+8 07 08.47 w Sagittarii -...-.. 59 05.55 |— 1.79 |+ 0.06 |+ 0.12 59 03. 94 06 12. 49 08, 55 m' Serpentis-..----. 10 07 39.01 |— 1.30 |+ 0.07 /+ 0,11 07 37.89 14 46.41 08. 52 1 Aquiless 7800 7 32.5 | 19.9 | 23.0 39 56 16.7 |-+ 3 08.2] 0.0 24.9 7258 8 52.3 | 21.0 | 22.0 7917 | 10 30.5 | 25.0 | 19.0 40 00 16.7 |— 0 55.3 |41.4 22.8 7931 7 46.3 | 21.0 | 22.8 7962 | 13 35.9 | 26.3 | 18.2 40 02 25.0 |— 3 03.1°/4+1.9 23.8 7997 | 13°37.8 | 21.2 | 23.0 8033 5 84.4 | 27.7 | 17.4 39 55 27.8 |+ 3 54.0 [42.3 24.1 8091 14 43.0 | 21.3 | 24.0 39/57 1227.|4= 207.8: |4-2. 7 23.2 2097 4 23.8 | 20.0 | 25.3 40 02 29.4 |— 3 08.7 |+2.0 22.7 8107 |} 10 31.4 | 29.2 | 16.8 8131 13 06.4 | 22.0 | 24.0 8158 7-50.1 | 28.3 | 18.0 39 56 28.7 |+ 2 52.8 42.3 23.8 8203 | 18 79.0 | 19.0 | 27.7 Gr. 4110 5 39.6 | 28.5 | 18.9 52 27.0 |-+ 6 56.0 |4-0.3 23.3 8268 499.7 | 29.0 | 18.4 39 52 14.7 |+ 7 08.4 |+0.5 | 39 59 23.6 17. AST bo ou (o 2) ASTRONOMY. Observations and computations—Continued. HUGHES, COLORADO. Level. Corrections. Number | Microm. Half-sum of E Date. of star. | readings. Remarks. declination. Rican Latitude. N. S Families ee Level. 1873. i Gah da. d. Cy sou Ay Ph July 18..-.. 8344 | 10 88.5 | 29.2 | 18.7 32 8 8.2 | 20.3 | 23.0 40 00 26.4 1 03.1 |-+40.8 | 3959 24.1 July 19..... 6129 | 10 57.8 | 20.0 | 17.1 6178 | 18 83.2 | 12.3 | 25.1 39 55 03.7 |4+ 4 16.4 |42.7 22.8 6355 | 12 91.9-} 20.2 | 18.5 6404 | 12 57.0} 18.0 | 21.0 39 59 13.9 |+ 0 10.8 24 24.3 6453 6 81.8 | 17.3 | 21.8 6496 15 81.0 | 28.0 | 11.3 40 03 59.7 |— 4 39.3 |+3.4 23.8 6516 | 14 21.1 | 20.0 | 18.9 6553 3 67.3 | 30.0] 9.0 04 46.6 |— 5 27.3 |46.1 25.4 6602 3 36.9 | 20.0 | 19.0 ; 6640 16 42,4 | 22.2 | 16.8 06 08.0 |— 6 45.5 |41.8 24.3 6673 5 37.2 | 17.6 | 21.0 723 | 15 81.0} 29.0 | 10.4 04 44.6 |— 5 24.2 |44.2 24.6 6740 6 65.6 | 18.3 | 21.0 6763 | 13 33.6] 29.8 | 9.8 02 47.8 |— 3 27.5 7 25.0 6805 7 29.5 | 17.0 | 22.3 6836 | 11 06.2 | 25.0 | 14.0 01 18.7 |— 1 57.0 |41.6 23.3 6851 4 14.5 | 24.0 | 15.0 6876 | 15 44.2] 18.0 | 21.0 05 13.3 |— 5 50.9 |+1.6 24.0 6890 7 25.9 | 26.0 | 13.5 6905 | 16 66.4 | 13.0 | 26.8 40 04 15.3 |— 4 52.1 |-0.4 22.8 6913 5 66.0 | 13.0 | 26.8 39 58 33.8 |+ 0 49.7 |—0.4 23.1 6928 | 16 64.7 | 24.6 | 15.0 6973 291.8 | 14.8 | 25.5 40 06 30.1 |— 7 06.4 |—0.3 23.4 6996 | 16 27.0 | 23.3 | 16.8 7022 4 21.2 | 16.8 | 23.5 05 39.1 |— 6 14.5 |—0.1 24.5 7041 16 51.9 | 19.5 | 21.0 7061 2 92.5 | 21.3 | 19.0 40 06 25.7 |— 7 02.2 |40.2 23.7 7091 3 63.6 | 23.2 | 17.0 i 7131 7 02.3 | 14.7 | 25.8 39 57 39.8 /+ 1 45.2 |—1.4 23.6 7182 | 14 08.0 | 17.6 | 23.0 ’ 7194 4 63.2 | 26.5 | 14.0 40 04 14.9 |— 4 52.8 |42.0 pL a 7313 5 52.5 | 16.7 1] 24.4 7326 | 14 55.0 | 27.0 | 14.3 04 04.71)— 4 40.3 |4-1.4 25.8 Lal. 4 08.8 |—1.5 | 42.7 40 04 05.0 |— 4 40.6 6 23.8 7402 | 13 12.2] 41.5] 0.2 7462 | 13 31.0 |—1.2 | 42.5 39 59 18.8 |+ 0 05.8 |—0.7 | 3959 23.9 LATITUDE DETERMINATIONS. 259 Observations and computations—Continued. HUGHES, COLORADO. Level. Corrections. Number | Microm. : Half-sum of ‘ DED of star. | readings. EASELS St declination.| 750.96 Latitade. wk S and refr. Level. 1873. tone d. d. Sage EM? lV uu te Oy ee dibs TK) Arg. 10 34,0 | 23.0 | 19.0 40 02 18.4 |— 2 52.4 |—2.6 | 3959 23.4 7560 17 10.1 | 23:6 | 19.0 40 05 48.9 |— 6 22.4 |—2.4 24.1 7607 478.9 | 14.7 | 28.0 7631 8 82.4 | 21.9 | 21.0 7706 | 12 00.7 | 19.3 | 24.0 39 57 45.0 |+ 1 33.9 |—1.0 22.9 a¢58 || 14 13,2) 19.3) | 24.6 7800 8 14.4 | 27.8 | 16.9 39 56 17.0 |+ 3 06.0 |+1.5 24.5 72858 3 65.1 | 27.8 | 17.0 7917 5 32.7 | 14.0-] 31.0 40 00 17.0 |— 0 52.1 |—1.7 23.2 7931 7 48,2 | 19.5 | 25.4 7962 | 13 36.5 | 27.9 | 17.4 40 02 25.3 |— 3 02.7 |4+1.3 23.9 7997 | 13 78.7 | 25.0 | 19.8 8033 6 12.1 | 15.0 | 30.0 39 55 28.1 }+ 3 58.1 |—2.7 23.5 8091 | 14 28.2} 30.0 | 14.8 8107 9/9850) |) (953 | 35.3 57 13.0 |+ 2 13.6 |—3.0 25. 6 8131 | 13 32.4 | 19.3 | 25.0 8158 7 75.0 | 28.3 | 16.2 56 29.0 |+ 2 53.1 |+1.8 23.9 8203 | 18 77.7 | 23.0 | 21.4 Gr. 4110 5) 45.7 | 27.7 | 17.6 52 27.3 |+ 6 53.7 |4+3.2 24.2 8268 5 04.1 | 28.6 | 18.0 39 52 14.9 |4+ 7 06.6 |+3.4 24.9 8280 | 17 41.8 | 25.0 | 20.3 8296 2) 5453) |) 2053) 25.0 40 07 04.5 |— 7 42.0 |42.6 25 1 8344 | 10 86.3 | 24.0 | 21.7 32 8 86.4 | 21.0 | 24.9 00 26.7 |— 1 02.1 |—0.4 24.2 July 20..... 6234 T5052) | G74) 225 1 6246 | 15 60.6 | 21.0 | 18.0 06 41.4 |— 7 18.0 |—0.7 OT 6453 6 56.7 | 23.0 | 16.0 6496 | 15 44.1 | 14.0 | 25.3 03 29.9 |— 4 35.6 |—1.2 2ank 6602 3 45.4 | 17.0 | 23.3 6640 | 16 52.3 | 27.7 | 13.0 06 08.3 |— 6 45.9 |+2.3 24.7 6805 8 60.5 | 23.0 | 17.3 6836 | 12 29.6 | 20.3 | 21.1 01 19.0 |— 1 54.6 |41.3 25.7 6851 3 61.4 | 20.3 | 21.0 6876 | 14 84,5 | 19.0 | 22.8 05 13.6 |— 5 48.8 |—1.2 23.6 6890 7 44,8 | 20.3 | 21.0 6905 | 16 79.0 | 18.0 | 23.8 40 04 15.5 |— 4 50.2 |—1.8 23.5 6913 5 80.0 | 17.4 | 24.0 39 55 34.1 |+ 0 51.2 |—2.0 23.3 6928 | 16 28.0 | 20.2 | 21.0 6973 2 56.7 ' 23.3! 17.4 40 06 30.4 I— 7 05,9 [41.4 39 59 25.9 260 ASTRONOMY. Observations and computations—Continued. HUGHES, COLORADO. Level. Corrections. Number | Microm. eye Half-sum of z Date of star. | readings. Remarks. | declination. Rona Leute N. s cen ret. Level 1873. t d. d. d. o 7 “ PAA) u“ Ont July 20... -.- 6996 15 61.8 | 23.2 | 17.3 , 7022 3 59.4 | 14.6 } 25.6 40 05 39.4 6 13.5 |—1.4 | 39 59 24.5 7041 | 1G 47.2 | 22.1 | 18.2 7061 2 92.6 | 15.3 | 24.4 40 06 26.1 |— 7 00.7 |—1.4 24.0 7091 2 81.0 | 18.3 | 22.0 7131 (} IGS) |) PESO) || ka 7 39 57 40.1 |4+ 1 43.7 |40.7 24.5 7182 | 13 45.3 | 24.0 | 15.9 7194 4 15.2 | 12.0 | 27.6 40 04 15.2 |— 4 48.9 |—2.1 24.2 7313 5 11.4 | 21.8 4 > 7326 | 14 06.0 | 13.4 | 27.0 40 04 05.0 |— 4 37.9 |—2.8 24.3 7402 | 12 48.0 | 24.4 | 16.0 7462 | 12 65.3 | 15.0 | 25.8 39 59 19.2 |4+ 0 05.4 |—0.7 23.9 Arg. Y 66.4 | 24.3 | 17.0 40 02 18.7 |— 2 62.5 |—1.5 24.7 7560 | 16 42.4 | 23.9 | 17.4 40 05 49.2 |— 6 22.4 |-1.7 25. 7607 4 11.1 | 14.3 | 27.0 7631 8 79.8 | 23.5 | 18.3 7706 | 12 02.7 | 15.7 | 27.0 39 57 45.3 |+ 1 40.3 |—1.7 23.9 7753 13 27.2 | 25.7 | 17.0 7800 7 27.6 | 19.0 | 24.0 39 56 17.3 |+ 3 06.2 |41.0 24.5 7858 9 09.5 | 26.3 | 17.0 7917 | 10 80.0 | 17.0 | 26.8 40 00 17.3 |— 0 53.0 |—0.1 24.2 7931 vf blsS5)) TER SY || PEA @ 7962 13 26.9 | 27.5 | 16.4 40 02 25.6 |— 3 01.8 |41.2 25.0 7997 | 13 37.9 | 22.0 | 22.0 £033 5 83.0 | 25.2 | 19.0 39 55 28.4 |4 3 54.5 [41.7 24.6 2091 | 15 10.0 | 28.0 | 16.3 39 57 12.3 |+ 2 10.8 |40.6 24.4 8097 4 90.4 | 27.3 | 17.0 40 02 30.0 |— 3 05.9 |+0.2 24.3 8107 | 10 88.8 | 17.4 | 27.0 8131 12°86.6'| 21-2} 2229 8158 Ze PAIRS) || PSE |) ile 39 56 29.3 |+ 2 55.4] 0.0 24.7 8203 | 18 37.8} 19.0 | 25.1 Gr. 4110 4 97.5 | 26.0 | 18.5 52 27.6 |+ 6 56.3 +0.4 24.3 8268 4 57.4 | 27.0 | 17.4 39 52 15.2 |+ 7 08.8 +1.0 25.0 8280 | 16 52.5 | 23.0 | 21.7 | ; 8296 1 70.0 | 19.9 | 24.8 40 07 05.3 |— 7 40.5 |—1.0 23.8 8344 | 11 11.0 | 23.0 | 22.0 | 32 9 06.3 | 24.0 | 21.7 00 26.9 |— 1 03.6 |+0.9 24,2 July 21..... 6805 8 63.5 | 16.6 | 27.8 | 6836 | 12 47.1 | 36.5 | 9.3 40 01 19.3 |— 1 59.2 [44.4 | 39 59 24.5 LATITUDE DETERMINATIONS. Observations and computations—Continued. HUGHES, COLORADO. Level. Corrections. Number | Microm, |— 2 Half-sum of ° ines. of star. | readings. as declination.| y;o70m ENS. <= 5 N. Ss. anal Aan Level. 1873. he hs d. d. Oe es es ae PO ate Bey el yaoi 6290 @ O45 | cose) |) Lees: 6905 TOMA CO OVS P2650 40 04 15,8 |— 4 52.7 |+0.9 | 39 59 24.0 6913 5 48.0 | 19.0 | 27.0 59 58 34.4 |-+ 0 48.6 |+0.5 23.5 6928 | 16 09.8 | 24.8 | 21.0 6973 2 20.4 | 31.0 | 15.0 40 06 30.7 |— 7 11.5 |+5.4 24.6 6996 15965,9526259)) LOLS 7022 3 52.4 | 22.0 | 24.0 40 05 39.7 |— 6 16.9 |+1.4 24.2 7091 - 3 54.4 | 19.0 | 27.8 7131 (tells |) ese) || A 7/ 39 57 40.4 |-+ 1 41.5 |4+2.4 24.3 7182 | 13 66.8 | 29.0 | 18.0 7194 4 24.6 | 19.3 | 27.6 40 04 15.5 |— 4 52.6 |40.7 23.6 7213 | 11 48.0 | 22.0 | 24.7 7253 BM YiPintei || Gils 8} | wey fe} 39 57 57.8 I+ 1 23.9 |+3.5 ay, 2) Lal. SRO 76h 1) 2 0Re! 40 04 05.7 |— 4 42.3 |41.3 | 24.7 7402 | 12 84.8) 42.7) 5.0 7462 | 1296.4] 7.3] 40.4 39 59 19.5 |+ 0 03.6 |-+1.3 , 24.4 Arg. 9 28.2 | 24.0 | 22.2 40 02 19.0 |— 2 64.3 |—0.9 23.8 7560 | 16 09.9 | 28.8 | 19.5 40 05 49.5 |— 6 26.1 |+1.2 24.6 7607 3 66.9 | 21.9 | 26.9 7631 818510) )25..0) |) 23.3 7706 | 11 33.8 | 23.3 | 25.2 39 57 45.6 |+.1 38.1] 0.0 23.7 “ioe | > 12) 48,3 | 21.7 | 26.8 7800 6 59.7 | 35.4 | 13.9 | 39 56 17.6 |+ 3 02.8 |+4.5 24.9 7858 8 97.2 | 35.4 | 13.9 7917 | 10 80.4 | 21.7 | 26.8 | Cloudy. 40 10 17.6 |— 0 56.9 |+4.5 OB Ci Weis soe 5775 | 13 16.8 | 29.0 | 16.0 5788 6 73.5 | 20.0 | 25.0 02 41.6 |— 3 19.8 |42.2 24.0 5883 2 87.2 | 26.0 | 20.3 5902 | 16 13.0 | 28.8 | 18,4 40 06 18.0 |— 6 51.8 |—1.3 24.9 5975 @ €128) }) W2s35)) 30.0 5986 | 10 34.7 | 37.0 | 10.2 39 58 00.4 {4+ 1 21.7 |41.1 23.2 6052 | 12 84.2 | 37.0 | 10.2 6084 yf 282 |) 2S} |) SE) 40 02 17.5 |— 2 54.3 |41.1 24.3 6129 5 83.4 | 26.6 | 21.8 6178 | 14 15.0 | 23.0 | 26.0 39 55 04.7 |+ 4 18.3 |4+0.5 23.5 6234 1 66.6 | 30.3 | 18.9 6246 | 15 73.9 | 18.4 | 31.0 40 06 42.1 |— 7 17.1 |—0.3 24.7 6258 | 12 68.9 | 17.9 | 31.6 05 07.2 |— 5 42.4 |—0.6 24.2 6349 5 72.6 | 23.0 | 27.0 40 03 01.2 |— 3 41.4 [44.0 . 23.8 6355 | 13 02.3 | 22.8 | 27.0 39 59 15.1 |+ 0 05.3 |44.0 | 39 59 24.4 6404 12 85.3 | 34.6 | 16.0 262 ASTRONOMY. Observations and computations—Continued. HUGHES, COLORADO. Level. Corrections. Number | Microm. - Half-sum of Date. of star. | readings. Remarks. declination. | y4;.59m N 8 and refr. Level. 1873. im. 0G d. d. foe sf Ld July 23..-- 6453 6 49.4 } 24.5 | 25.6 6496 15 56.4 | 33.8 | 16.8 40 04 00.7 +4.4 6516 | 14 10.4 | 26.3 | 24.2 6553 3.56.6 | 33.0 | 17.7 04 47.7 +4.8 6602 2 69.3 | 32.4 | 18.7 6640 15 68.0 | 13.8 ; 38.0 06 09.1 —2.9 6673 |~ 5 10.9 | 29.2 | 22.0 6723 | 15 44.3 | 22.2 | 29.8 04 45.8 —0.1 740 6 65.3 | 26.5 | 25.0 6763 13 26.5 | 28.2 | 23.9 02 49.0 +1.6 6805 7 08.3 | 22.8 | 28.0 6836 10 94.2 | 34.2} 18.0 01 19.7 +3.3 6851 2 95.9 | 25.0 | 26.7 6876 | 14 22.2 | 27.5 | 24.0 05 14.5 +0.5 6890 6 68.0 | 25.2 | 26.5 6905 | 16 12.2 | 27.3 | 24.3 40 04 16.3 +0.5 6913 5 12.5 | 28.2 | 24.0 39 58 34.9 +0.8 6928 | 16 57.6 | 29.7 | 22.3 6973 2 80.0 | 23.0 | 29.4 40 06 31.3 +0.3 6996 |: 15 42.3 | 29.5 | 22.8 7022 3 40.8 | 24.3 | 28.4 05 40.3 +0.7 7041 16 41.4 | 29.0 | 23.5 7061 275.3 | 25.9) | 2700 40 06 27.0 +1.2 7091 3 26.7 | 24.6 | 28.0 7131 6 52.1 | 31.0 | 21.9 39 57 41.0 +1.6 7182 | 13 50.2 | 24.0 | 28.8 7194 4 01.2 | 35.0 | 18.0 40 04 16.1 +3. 4 7213 11 40.6 | 29.9 | 23.2 7253 8 73.2 | 28.8 | 24.6 39 57 58.4 |+ 1 23.1 |4+3.0 7313 5 70.0 | 26.8 | 26.6 7326 14 83.6 | 31.4 | 22.2 40 04 06.0 4 43.8 ve 6 Lal. 3 52.2 | 23.7 | 30.0 40 04 06.3 4 44.8 +2.2 7402 | 12 69.1 | 34.0] 19.8 | 7462 | 12 79.0 | 20.0 | 34.0 39 59 20.1 |4+ 0 03.1 ie 0 Arg. 8 68.1 | 23.4 | 31.0 40 02 19.7 |— 258.6 44.5 7560 | 15 44.5 | 23.3 | 31.0 40 05 50.1 6 28.7 44.5 7607 | 2 93.0.| 38.9 | 15.0 | Latitude. 23.2 25.6 | 39 59 25.9 a LATITUDE DETERMINATIONS. 263 Observations and computations—Continued. HUGHES, COLORADO. eee OOOO Level. Corrections. Number | Microm. : Half-sum of ‘ Ee: of star. | readings. Remarks. | declination. MSoroR Latitude. N. iS) mail aaee Level. 1873. Us Ch d. d. On ee ee! Ge) sits ot July 23...-.. 7631 8 43.0 | 31.5 | 22.8 7706 | 11 56.2 | 23.9 | 31.0 39 57 46.2 |+ 1 37.3 |+0.4 | 39 59 23.9 7753 | 12 78.0 | 24.8 | 29.9 7800 6 86.8 | 36.0 | 19.0 | Cloudy ..---. 39 56 18.2 |+ 3 03.6 |+3.3 | 39 59 25.1 ASTRONOMICAL CO-ORDINATES OF HUGHES, COLORADO. Longitude.. 6 59™ 158.92 or 104° 48’ 58.80 + 0.06 west from Greenwich. Longitude... 1° 51™ 03°.80 or 27° 45! 57.00 west from U. 8S. Naval Observa- tory, Washington, D. C. Latitude ... 39° 59/ 24.09 + 0.03 north. From all pairs observed more than twice the probable error of one observation for latitude is found to be + 0.’’40, and, therefore, that of the final result is ++ 0.033. U. 8S. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN, ist Lrzeut. GEO. M. WHEELER, Corrs or ENGINEERS, U. S. AnMy, IN CHARGE. RESULTS OBSERVATIONS MADE BY DR. F. KAMPF AND JOHN H. CLARK IN THE DETERMINATION OF THE ASTRONOMICAL CO-ORDINATES OF LABRAN, COLORADO. SEASON OF 1873. COMPUTATIONS LY Dr. F. KAMPF axp JOHN H. CLARK. 265 LABRAN, COLORADO. GEOGRAPHICAL POSITION OF STATION. Longitude, . . 105° 06/ 17’.78 + 0.44 west from Greenwich. Latitude, . . . 389 23/ 08.97 + 0.03 north. Barometric altitude of observatory above sea-level, 5217.8 feet. The astronomical monument is 157 feet from the southwest corner of the depot at Labran. At the date of its occupation this station was the regular terminus of the railroad from Pueblo, but from here a branch diverged to some neighboring coal-mines, for the convenience of the Colo- rado Central Improvement Company. Since that time the track has been continued to Cafion City. Streets were laid out through this settlement; but only four houses, besides the railway depot, had been erected. The office of the improve- ment company was in charge of Mr. Neilson R. Clark, civil engineer, to whom thanks are due for his assistance in making the various arrangements at this place. In the east and southeast the country is level to the horizon. In the south, southwest, and northwest the foot-hills of the Rocky Mountains rise abruptly to an eminent height. But little farming, and that by irrigation, is done in this part of Colorado. Three inches below the surface the ground is too hard to be permeated by the water of the rains, and it escapes to the Arkansas River, which flows by in an easterly direction, at a distance of one and a half miles. METEOROLOGICAL CONDITIONS. The atmosphere at this station was free from undulation. At first it was constantly stormy, and neither stars nor sun were visible, but after three days of rain-it cleared away and became tolerably fair. The wind was always very strong, and the observing-tent was often in danger of being blown away. 268 ASTRONOMY. The following table gives the general direction of the wind and the appearance of the sky during the observations at this station : General direction of wind. | Date. General appearance of the sky. Ohto8am. |8a.m.to4p.m.| 4p. m. to 0% 1873. | AMOUBHL 2! | eee eerie N.W.and N.E. E.andN.W. | Thunder and rain at 4.50 p.m.; clear at night. 13 N. W. N. E. S.E. and N. W. | Lightning at 8 p.m. 14 N. W. N. E. N. W. Cloudy and rainy winds at 2.35 p. m.; heavy rain and storm at 4.30 p.m. 15 Ss. W. 8. E. E. and N. EK. Rainy the whoie day. 16 N.W. E. N.E. and N. W.| Heavy ram and lightning; clearing off a little at night. 17 (No.) N. E. N.W. Rain-storm at 1.20 p.m. and 2.30 p.m. 18 N.W. N.W. §. E. and N. W. | Rain from 2.15 to5 p. m.; then clearing off. 19 N. W. N.W. N.W. Rain at 4 p.m.; clearing off at night. 20 N.W. N. W. and N. E. N. W. Partly cloudy; lightning in south at 11 -m. 21 |S. W. and N. W. N.E. EK. Ran at 3 p.m.; clear at night. 22 (No.) N.E. N. W. Rain-storm from 2.05 p.m. to 3.45 p.m; rain at 6 and 11 p.m. 23 WE We N. W. and N. E. S. E. Rain-storm jrom 2.20 p.m. to 3.50 p.m.; hail-storm at 3.30 p.m.; lightning in northeast. 24 BV N. W. and N. E. S. E. Rainy. 25 Changeable. N. 1. E.and § Clear. 26 . W. N. W. N.E. Clear. 27| Changeable. | N. W.and N.E. N.E. Partly cloudy. 28 NeWe PU Wel acheitcccase|a-beescoeneeeee OBSERVATORY—INSTRUMENTS INSTRUMENTAL VALUES. The observatory and instruments were the same here as at Colorado Springs, and are described in the report upon the latter station, date of 1874. The telegraph-line was a loop from the office at Pueblo, used for railroad This loop was continued from the local office into the astronomical tent. Mr. D. Siemsen, in charge of the railway and telegraph office at this point, kindly assisted in the exchange of signals. The line was always in very bad condition, and exchanges had to be made by sound, except on the 25th, when the signals were recorded by the chronograph. The length of circuit from Labran to Salt Lake City is about 800 miles. The signals were transferred at Denver, Cheyenne, and Corinne by auto- business alone. matic repeaters. CONNECTIONS.—OBSERVERS.—COMPUTERS. Salt Lake City was the connected station, at which point Mr. John H. Clark was observer. Observations at Labran were made by Dr. F. Kampf. Each observer made the computations to accompany his own work. TABULATION OF STARS. 269 Tabulation of stars used for determination of time at Labran, Colorado, and Salt Lake City, Utah, 1873. SALT LAKE CITY. LABRAN, COLORADO. UTAH. d Dy Name of star. 9 2 | August 12. August 16 August 19. | August 20. | August 26. | August 16. | August 19. : | August 21. | August | August 25 : | August 26. San OP MICHIE eae sae cee me eee See cee eeneetee |Meat Sess He TCLCUIS 2 2 aes os whee See eoe sas hee elice a Ze es bell Pe sao faOpbhinchiv. 32-5 cee see Sees es s2e|be : See en (Ure) MInOLis\s= 2-00 5-cee cease oe eseee ena ies 2 2 SN (ee | fees] es) (ee tei Hoot CUaTICLGDIIS= | ae cek a cee cotee eos oon waste meee fens] - =e Boel : 2 = ee lees AAC Ophichi= Sacets sac seers o ne ees = Saeco ake |lbe es) = =- _ Beal ese leeee fas WTACOnISe Hascee ek oe ow ee ee sete tee (Pees ae See | (ese 8| Seon) sees Opbiughi Draconis Herculis Herculis ELErcHigueseese ceo nec she soacc. cee) See se Fi Draconismeas so see oe oon oe eoo acess [2 Draconis 2 Sagittarii XXXXXXXxXXX | Angust 17, 'xxXXXXXXxXXxX | August 18. eed See HE OCR Ke: eo xxxi xt OK KOO OX Nee a WE OEE SAT ' 1 ORI PSI © io) S Sy i= ° Es ' ' ‘ ' ‘ ' ' ‘ ' , ‘ ‘ ’ ' ‘ ay xx! x! NAgiGhAnI = asceoe <6 psc coon ee oto ccna |eoee Ursie Minoris Serpentis Brad. 2313 Ee ee eee a mee SOE 2 5 oe ae xx! x ay ee eK Os ene b 4 4 & 1 , . ' ‘ ' ‘ ' , , DN xXXXXXXXX! Lyre : Als al 3< x Salles 50 Draconis - cal |e Pate Sat | Semele et |e [eared Nee a 3 ING ni see Se Saeco e @ooaedav ee ramce erst Ee) een Fees er [acne Peete |b ce Tee a Wes eee Z Sagittarii sese||essallsanall >< == X. =a Bealcece WO TaCOnIse neee oe ee a oes Ren meer ene eae 5 ae | See >a (eer las ¥ pees Be = x van PAG sae oes eh oe te OO 25 eet E Ears Pal ee F = =o NC UL] Ste ee ae Mae ae ee EB Be Se Bere eal eoe Ballad oa Peer ee ape DY ACONIS see sce aoe es eee aats oop eet Salleoe oe | ee | 5 | | (en (a é AQ WUE as se ee oot a= 2 aes atone cet |) Male ifeeis Ips Saeed Haba aoe a Aquila sc ceescn dass ssoctesctcet ce tose mae Bote |e E ¢ aller oe tol Mek = ome iS) aerRoyrranre Can oay Q > fe) S = @apricomt-se 5 --= -- aoe ane eee 6 eee eae Eas eae @ephel specs perse a= soe ame cone K x! CMC fuiptae ec Goa cee Seemed BacieeiOnaEccecad bo eel eee eee Saco) ee Bal ose lsueal Seca neal Ee ees | o-4al ieee eee Te Oa PIiCOLMie-e Heo ae eae see see x =aaee Sallie RE AAs) oc 4 ae ee eel aoe (Bee em Delphine Se ees snes oaesonse ase sea ae= C5 a8 Sere MSGI se ES ae x ae Delp hind) = eesren Seen ee lee ake eee seas | Rees lens s| sae aee am =ml|'een| eos ae Groombreo eae san oe eee eee x Gs MCC Rie SSR SS eaieoesecsocs e Aquarii pw Aquarii vy Cygni on 12-Year Catalogue, 1879 -.-.-. ...-=-=-=-| X > x bid xx x x! x eee xxxxx:! Aquarii xXXXXXXXX! 270 ASTRONOMY. Observations and reductions for time taken at sending station. LABRAN, COLORADO, AUGUST 12, 1873. | Clamp. 44444eeeee | Clamp. bbb as 2a44 Name of star. Aquilz Cephei.--..----- Capricorni Delphini Groombr, 3241 - -- Oyoniaeessseee oy a Name of star. Aquarii Cephei Aquarii -.... .--- Capricorni 79 Draconis a@ Aquarii te Aa. Bb. Ce. Te. AR. AT. iy Gil Gs ch 8. 8. lip Vila fh Ie. Gide, aA Ss 20 09 31.33 |+ 0.25 |— 0.22 |— 0.03 /20 09 31.28 |19 57 58.47 | — 1i 32.81 24 46.14 |— 1.35 |— 0.21 |— 0.37 24 44.21 20 12 11.44 32.77 31 38.06 |+ 0.42 |— 0.02 |— 0.09 31 38, 37 20 05.70 32, 67 38 43.48 |+ 0.22 |— 0.03 |— 0.08 38 43.59 27 11.02 32. 57 42 09,57 |— 0.85 |— 0.05 |— 0.26 42 08. 41 30 35. 61 32. 80 48 41.40 |— 0.08 |+ 0.06 |+ 0.11 48 41,49 37 08. 47 33. 02 57 23.11 |+ 0.36 |4 0.03 |+ 0.08 57 23.58 45 50.68 32. 90 21 04 55.40 |— 1 &2 J+ 0.17 |+ 0.47 |21 04 54,22 53 21.52 32.70 12 47. 48 0.00 |-+- 0.03 |-+ 0.10 12 47.61 |21 01 14.88 32.73 21 19 06.57 |4+ 0.08 |— 0.01 |+ 0.09 |21 19 06.73 |21 07 34.17 | — 11 32.56 pemmSeeed hadmersdelss ees ces cenenceeace ose ae — 11 32.75 NORMAL EQUATIONS. O=-+ 5.383-+ 10.00 dt— 5.88a+ 0.25¢ ot = — 08,25 0 =— 14.47 — 5.88 dt + 28.34a+ 4.64¢ a=- 08.47 O=-+ 3.86+4 0.25dt+ 464a+74.13¢ c=— 05,08 Notr.—These observations were taken by eye and ear. LABRAN, COLORADO, AUGUST 16, 1875. ane Aa. Bb. Ce: due AR. XI 8. 8. Bs o lie Wis fb lip its Sb men eas 44,42 |+ 0.37 |+ 0.17./— 1.07 |20 48 48.89 |20 37 08.46 | — 11 35.43 28.79 |— 1.78 |+ 0.10 |— 0.78 57 26.33 45 50.70 35. 63 51.63 |+- 9.03 |+ 0.65 |— 4.42 (21 04 56,89 53 21.35 30, 54 51.25 0.00 |+ 0.18 |— 0.97 12 50.46 |21 01 14.89 35. 57 10.87 |— 0.40 |+ 0.17 |— 0.88 19 09.76 07 34.18 35. 58 10. 37 |-+ 2.01 |4+ 0.30 |— 1,62 27 11.06 15 35. 55 35. 51 36 31.04 |— 1.66 0.00 |+ 0.77 36 30.15 24 54.90 30. 20 38 34.04 |-+ 3.60 0,00 |-+ 2.23 38 39, 8&7 27 03.94 35. 91 42 38.25 |— 1.71 0.00 |+ 0.78 42 37.32 31 01.96 35, 36 58 01.50 |— 1.94 |— 0.07 |4+ 0.79 58 00. 28 46 24.92 35. 36 22 02 49.05 |+ 4.56 |— 0.28 |+ 2.62 |22 02 55.95 51 20.72 35. 23 22 10 54.27 |— 1.47 |— 0.08 J+ 0.76 \22 10 53. 48 /21 59 18.10 | — 11 35.38 See ume. Sots Soe aie cous ree ae Conc we eee ce eee — 11 35.48 Mean at 21" 18™ local sidereal time NORMAL EQUATIONS. 0—— 092-1 12.00d¢— 4.88a'— 237e O=+4+7.05— 4.88 dt + 24.11 a + 14.9401 0=4+0.72— 2.37 dt-+ 14.94 a' + 68.60 cl dt = — 08,05 a = — 08.34 co! = + 08,06 Adopted azimuth =— 25.00 collimation = -+ 08.70 therefore a=— 28.34 and e=- 08.76 TIME DETERMINATIONS. maa | Observations and reductions for time taken at sending station—Continued. LABRAN, COLORADO, AUGUST 17, 1873. io) 5 Name of star. me Aa. Bb. Ce. Wy, AR. AT. 5 | . hem. | 8: 8. 8. 8. hem. 8 hom. 8. ™,. 8. Wiel GeOphinchi-.--=-- 16 41 51.33 |— 2.57 |— 0.04 |— 0.95 |16 41 47.77 |16 30 11.64 | — 11 36,13 W.|'7 Herculis .--. ---- 50 11.41 |+-.0.07 |— 0.10 |— 1.20 50 10.18 38 33. 96 36, 22 W..| « Ophinchi-.--. ---- 17 03 19.86 |— 1.63 |— 0.09 |— 0.95 |17 08 17.19 51 40.99 36. 20 W.| © U:sx Minoris---- 10 32.19 |+17.13 |— 0.64 |— 6,88 10 41.80 59 05, 52 36, 28 W. | a! Herculis .---. .---. 20 31.76 |— 1.40 |— 0.13 |— 0.97 20 29.26 |17 08 53. 07 36. 19 E. | 44 Ophiuchi..-...--. 30 17.70 |\— 3.23 |— 0.12 |4+ 1.01 30 15, 36 18 38.97 36. 39 15.) G) Draconis)---.-2-- 39 09.34 |-+ 1.33 |— 0.40 |4+ 1.52 39 11.79 27 35.41 36. 38 E. | @ Ophiuchbi..-.-..-. 40 41,24 |\— 1.50 |— 0.24 |+ 0.96 40 40. 46 29 04.12 36. 34 BE. | o Draconis ..------ 49 13.34 |-+ 4.67 |— 0.79 |4 2.56 49 19.78 37 43. 67 36.11 ie |pae Elerculistes--)---- 17 53 07.23 |— 0.70 |— 0.33 [+ 1.05 117 53 07.25 |17 41 31.05 | — 11 36.20 Meantatey 9 06™) local siderealibime sare sacle see sete al - aciel areola ela ala) emia =r — Il 36.25 NORMAL EQUATIONS. 0—— 15.27 -+ 10.00 dt— 3.65a— 4.136 dt = ++ 08.75 0=-+-73.98— 3.65 dt 30.74 a + 33.63 ¢ @ Saas O=-+ 46.92 — 4.13 dt + 33.63 a + 73.57 © ¢ —+0393 LABRAN, COLORADO, AUGUST 18, 1873. & g Name of star. os Aa. Bb. Ce. de AR. (NES is) hem 8. Ce 8. 8. lie GPa Gk hom. 8. Mm. 8. Ben | Gee Ophinebie sss. —- 16 41 48.37 |— 0.26 0.00 |+ 0.80 |16 41 48.91 |16 30 11.62 | — 11 37.29 Beli Elercolisieass: 2-26 50 10.16 |+ 0.01 |— 0.04 |4 1.01 50 11.14 38 33.94 37. 20 Bey) ke Ophiachiees. =. 17 03 17.68 |— 0.17 |— 0.05 |4 0.80 |17 03 18.26 51 40.98 37.28 E. | e Urse Minoris.---. 10 35.55 |-+ 1.76 |— 0.43 |4 5.79 10 42. 67 59 05. 33 7. 34 E. | ec! Herculis ..:. .-.. 20 29.76 |— 0.14 |— 0.07 |+ 0.81 20 30.36 |17 08 53.05 37.31 W. | 44 Ophiuchi........ 30 17.59 |— 0.33 0.00 |— 0.85 30 16.41 18 38.96 37.45 W. | 6 Draconis\---= ---- 39 13.92 |+ 0.14 0.00 |— 1.28 39 12.78 27 35. 38 37.40 W.| a Ophiuchi.....---. 40 42.37 |— 0.15 0.00 |— 0.81 40 41.41 29 04.10 37,31 W.|o Draconis .-....-. 49 22.52 |+ 0.48 0.00 |— 2.16 49 20.84 37 43.61 Sve CR W.| yu Herculis ........ 17 53 09.30 |— 0.07 0.00 |— 0.88 |17 53 08.35 |17 41 31.03 | — 11 37.32 Mean at 175\06™ local pidereal time-.--=-----=.--s- — 0.53 |— 0.31 - 1.14 {19 02 09.57 | 50 29.93 39.59 Wilke pAguilee nye 1.40 + 0.10 |— 0.09 — 0.30 11 16.11 59 36. 37 29. 74 W.| @ Sagittarii -...... 21 54.56 + 0.20 |— 0.06 |— 0.31 21 54.39 19 10 14.70 39. 69 W.| 6 Draconis --..--..|19 24 14.32 |— 0.28 |— 0.23 /— 0.76 /19 24 13.05 |19 12 33.55 | — 11 39.50 Mean ‘at 18° '30™ local sidereal’ time: =-- .ss--eaeeecle seen es anciee eee seen Sane eee = dono NORMAL EQUATIONS. O=+ 2.57 -+12.00 dt— 4.79a— 2.54¢ dt = — 05.06 0O=— 3.86— 4.79dt+14.50a+ 1.16¢ a=- 03,22 0O=—15.46— 2.54dt+ 1.16a+52.62c c=+ 0529 TIME DETERMINATIONS. 273 Observations and reductions for time taken at sending station—Continued. LABRAN, COLORADO, AUGUST 21, 1873. 44 B (3) | Clamp. 4444 44peeen 4 Sale vae CLC) e RPS aD Name of star. Ts Aa. Bb. Ce. AE AR. AT. hm. 8. 8. 8. 8. hsm: 8. h. m. . 8. m. 8. Ophinehi=ss-.<- 17 20 19.27 |+ 0.55 |— 0.04 |— 0.37 |17 30 19.41 |17 18 38.92 | — 11 40.49 Draconis ......-- 29 16.93 |— 0.23 |— 0.14 |— 0.56] 39 16.00 27 35, 29 40.71 Draconishase- ees 39 25.88 |— 0.79 |— 0.21 |— 0.95 49 23,93 37 43. 44 40. 49 Herculis ........ * 43 11.87 |+ 0.12 |— 0.11 |— 0.39 53 11.49 41 30.98 40, 51 Draconis’ .......-. 45 56.77 |— 1.03 |— 0.30 |— 1.12 55 54, 32 44 13.76 40.56 Draconis ........ 18 05 21.66 |— 0.20 |— 0.31 |+ 0.55 |L8 05 21.70 53-41, 25 40. 45 Sagittarii -.....- 09 21.02 |+ 0.61 |-- 0.08 |+ 0.40 09 21.95 57 41.38 40. 57 Sagittarii .....-. 17 52.17 | 0.52 |— 0.1L |+ 0.37 17 52.95 |18 06 12.34 40. 61 Urs Minoris....| 25 07.18 |— 7.12 |— 2.67 |+ 5.82 25 03. 21 13 22. 66 40, 55 A quilssee. eee 18 39 59,93 |+ 0.41 |— 0.16 |+ 0.35 |18 40 00.53 [18 28 19.86 | — 11 40, 67 Meaniathle> 00m local’sidereal-timey.~- 2.2 cassee.sc cce< ooo cece cwaciesantesecees — 11 40.56 NORMAL EQUATIONS. - 0=+ 3.67-+ 10.00 d¢— 12.67a+ 11.85¢ ot = — 65,06 0 =— 26.20 — 12.67 dt + 167.86 a — 201.39 ¢ a=-t 03.56 O=-+ 5.92 + 11.'5 dt — 201.389 a + 315.14 ¢ ce=-+ 08,34 LABRAN, COLORADO, AUGUST 25, 1873. Name of star. oy Aa. Bb. Ce. HY, AR. a Leis TER Gy 8. 8. lis lee et hom. 8. Ms <8: Draconis ...- .--- 17 39 20.07 |— 0.31 |— 0.06 |+ 0.35 |17 39 20.05 |17 27 35.16 | — 11 44.89 Ophiuchi-- -| 40 48.30 |+ 0.35 |— 0.08 |+ 0.22 40 48.79 29 04.00 44.79 Serpentis. - -|18 26 30.35 |+ 0.51 |— 0.13 |+ 0.22 |18 26 30.95 |18 14 46, 22 44,73 Aquil seacoast a= 40 03.92 |+ 0.57 |— 0.08 |+ 0.22 14 04. 63 28 19. 82 44,81 PyTB) = 2s <1 sms 44 24,52 — 0.01 |— 0.12 |+ 0.28 44 24,67 32 40.10 44,57 Piyiealbn. Joe cance 57 10.15 |-+ 0.08 |+ 0.20 |— 0.24 57 10.19 45 25.3 44, 88 Draconis: --.--- 19 02 17.07 |— 1.83 |+ 0.25 |— 0.84 |19 02 14.65 50 29. 62 45. 03 Aquila s-—sc1- > 11 21.00 |+ 0.34 |— 0.03 |— 0.22 11 21.09 59 36. 32 44.77 Sagittarii ....... 21 59.03 |+ 0.69 0.00 |— 0.23 21 59.49 |19 10 14. 67 44, 82 Draconis ..--..-- 24 19.47 |— 0.99 |+ 0.05 |— 0.56 24 17.97 1D BR eR 44, 62 Draconis; -o-=-= 19 29 48.03 |— 1.53 I+ 0,11 — 0.74 119 29 45.87 119 18 01.30 | — 11 44.57 Meantatile) 46m%localisiderenl:tim@re-c soeetsse. sees ceae Pacteav-sca.ceac- ccm cm-- — 11 44.738 NORMAL EQUATIONS. 0=+ 6.744 11.00 dt— 2.74a— 7.21e dt = — 08.28 O—— 15.24— 2.74 5¢ +. 13.384 + 19.050 a—- 0378 0=— 26.44— 7.21 51 + 19.05 a+ 44.96 0 e=-+ 08.21 18 AST 274 ASTRONOMY. Observations and reductions for time taken at sending station—Continued. LABRAN, COLORADO, AUGUST 25, 1873. re I Name of star. TT Aa. Bb. Ce. i. AR. AT. S) h. m. 8. 8. 8. hem. . 18s h. m 8 W.| «x Capricorni ..-..--. 20 31 50. ‘02 + 0.72 |+ 0.05 |— 0.17 |20 31 50, 62 |20 2 30 05. 69 | — 11 44.93 W.|e Delphini --..-..-.- 38 55.62 |+ 0.38 |+ 0.07 |— 0.16 38 55.91 37 11.01 44.90 Ww. Groombr. 3241 -.-. 42 21.92 |— 1.47 |+ 0.17 |— 0.52 42 20.10 30 35. 32 44,78 Wa lpem Cyonieese-heo- 48 53.54 |— 0.13 |+ 0.07 |— 0.23 48 53.25 37 08.40 44.85 E. 19-Y. C., 1879..-.|21 05 08.39 |— 3.13 |— 0.39 |+ 0.93 |21 05 05. 80 53 20.91 44,89 B. | 61 Cygni-.----..--- 12 59. 55 0.00 |\— 0.12 |+ 0.20 12 59.63 |21 01 14.88 44,75 1b || 6 CM. ss-c oss220 19 18.73 |+ 0.14 |— 0.09 |+ 0.18 19 18.96 07 34.17 44,79 E. |\@ ‘Cephei-.-----=- 27 20.78 |— 0.70 |— 0.17 |4+ 0.34 27 20.25 15 35. 48 44,77 E. | @ Aquarii......-.-'21 36 39.05 !4 0.57 |— 0.06 If 0.16 '21 36 39.72 121 24 54.93 | — 11 44.79 Meanlat 212 00™local’siderealtimes==—=--eeee soe esee ieee — 11 44.83 NORMAL EQUATIONS. O=-+ 1.3449.00dt— 445a+4+ 4.62c ét=-+ 08.17 0 = — 12.87 — 4.45 dt + 20.49 a — 18.62 ¢ =-+ 08.81 O=-+ 5.21 + 4.62 dt — 13.62 a 4 56.840 e=-t 02.16 LABRAN, COLORADO, AUGUST 26, 1873. a 2 | Name of star. Te Aa. | Bb. | Co. We AR. At. 3 lis te 86 8. ae 8. hem. 8. [tis Mee oa E. | 44 Ophiuchi......-. 17 30 25.95 |— 1.84 |— 0.05 |-+ 0.21 |17 30 24.27 |17 18 38.84 | — 11 45.43 E. | 8 Draconis ..-..-.- 39 19.79 |+ 0.76 |— 0.12 |+ 0.31 39 20.74 27 35.13 45. 61 E. | @ Ophiuchi-....... 40 50.14 |— 0.85 |— 0.06 |+ 0.19 40 49. 42 29 03.98 45. 44 E. | @ Draconis ..------ 49 25,82 |-+ 2.65 |— 0.17 |+ 0.52 49 28. 82 34 43.15 45. 67 E. | » Herculis .....--.| 53 16.53 |— 0.40 |— 0.09 [4 0.21 53 16.25 41 30.89 45. 36 E. | y! Draconis ....-..-- 55 55.26 |-- 3.45 |— 0.27 |+ 0.62 55 59. 06 44 13.40 45. 66 W.| 7 Draconis ..-..--. 18 05 26.27 |-+ 0.68 |— 0.04 |— 0.30 |18 05 26.61 53 41.09 45. 52 W.| 7? Sagittarii ....-.. 09 29.30 |— 2.05 |— 0.01 |— 0.22 09 27.02 54 41.31 45.71 W. | pv! Sagittarii ...--... 17 59.90 |— 1.74 |— 0.02 |— 0.20 17 57.94 |18 06 12.28 45. 66 W.| 6 Ursew Minoris....| 24 45.76 |-+-23. 88 6.00 |— 3.19 25 06. 45 13 20.88 45, 57 W.| 1 Aquile.-.......- 40 07.12 |— 1.38 |— 0.01 |— 0.19 40 05.54 23 19.81 45.73 Wis) @ TARE Secoces cscs 18 44 25.86 |+ 0.02 |— 0.01 |— 0.24 |18 44 25.63 /18 32 40.03 | — 11 45.55 Mean at 18"\00™ local pidereall time <--2-- -2-----s—~ ~~ = mn = ae — 11 45.58 NORMAL EQUATIONS. O=-+ 0.86 + 12.00dt— 12.23a!— 12.110 ot = + 08.02 0 = — 15.15 — 12.23 dt + 168.06 a! + 201.86 ct a= -+ 08.11 0 = — 17.41 — 12.11 dt + 201.86 a + 317.86 c! oe! = — 08.01 Adopted azimuth error of collimation -++ 08.20 therefore = — — 28.00 18.89 c= -+ 08.19 TIME DETERMINATIONS. 275 Observations and reductions for time taken at receiving station. SALT LAKE CITY, UTAH, AUGUST 16, 1873. a | EI Name of star. Ts Aa. Bb. Ce. a AR. AT. a hm 8. 8. 8. 8. he mm. 8: he mn; 8: he ™ | 8: E. | a! Herculis -...-..-.- 9 01 47.50 |— 0.84 |+ 0.03 |+ 0.22 | 9 01 46.91 |17 08 53.08 |+8 07 06.17 E. | o Draconis .....--- 30 34.58 |+ 2.37 |+ 0.10 |+ 0.58 30 37.63 37 43.72 06. 09 E. | » Herculis ........ 34 25.04 |— 0.46 |+ 0.06 |+ 0.24 34 24.88 41 31.06 06. 18 W. Draconis ----.--- 46 34.86 |+ 0.55 |4+ 0.17 |— 0.34 46 35, 24 53 41.38 06. 14 W.} 72 Ophiuchi-.-....-.. 54 16.59 |~ 0.96 |+ 0.09 |— 0,21 54 15.51 |18 01 21.63 06, 12 W.| uw! Sagittarii ....-..| 59 08.14 |— 1.73 |+ 0.05 |— 0.22 59 06, 24 06 12.39 06. 15 W.| 7 Serpentis.......- 10 07 41.62 |— 1.26 |+ 0.08 |— 0.21 |10 07 40.23 14 46. 22 06. 09 W. Bradl. 2313 ...-.. 14 55.30 |— 1.55 |+ 0.07 |— 0.22 14 53. 60 21 50.78 06. 18 W.| 1 Aquils---- -.---- 10 21 15.34 |— 1.38 |-+ 0.09 |— 0.21 |10 21 13.84 |18 28 19.91 |+8 07 06.07 Meantati1st:0ilocalisiderealitime)-ae ans namny coco eae neaceenaseinne enc eaeleae aoe +8 07 06.13 NORMAL EQUATIONS. + 9.00 d§-+ 2.89a— 1.8le—— 4.44 ot = + 08.13 + 2.89 d§+5.01la— 628c——10.01 a=— 15.820 — 1.81 dt — 6.28 a + 17.86 c= -+ 14.91 c= -+.08,209 SALT LAKE CITY, UTAH, AUGUST 16, 1873. = g Name of star. 7 Aa. Bb. Ce. TT AR. AT. 5 hom 8. 8. 8. 8s the ts CR VRS thes Gs isares | Wiel iye Aqniliaaccssce-- 11 33 10.39 |— 0.79 |+ 0.09 |— 0.17 |11 33 09.52 |19 40 15.55 |+8 07 06.03 Wiealres Agquiliss stesso. 37 32.42 |— 0.82 |+ 0.08 |— 0.16 37 31.52 44 37.47 05. 95 Wiei\te) Draconisjs--+-<- 41 30.44 |-+ 2.14 |+ 0.20 |— 0.47 41 32.31 48 38. 27 05. 96 E.| + Aquile.. --.-]| 50 52.97 |— 0.85 |+ 0.07 |+ 0.16 50 52.35 57 58. 45 06. 10 E.| 6 Aquilw......-...| 57 42.26 |— 1.01 |+ 0.07 |+ 0.16 57 41. 48 |20 04 47. 45 05. 97 E. | a? Capricorni ....-. 12 03 58.15 |— 1.25 [+ 0.07 |4+ 0.17 |12 03 57.14 |20 11 02.98 |+8 07 05.84 Meant at20>:0Jocalisidereal time)... scaccesoe se! soe cose aa sas + 0.49 + 0. 04, 25 W. | 72 Ophiuchi..-. .--. — 0.87 |+ 0. 04.15 W.| # Sagittarii -...--- — 1.56 |+ 0. 04.17 E. | 7 Serpentis -.-..---- — 1.13 + 0. 04. 10 E. Brad 23iseseese I— 1.39 |+ 0. 04. 05 De. || ib ANGER See oshss< — 1.25 |+ 0. 04.13 E. |) @ Lyre -.-: — 0.08 |+ 0. 04.19 Be Wyre 22a 5---- — 0.11 + 0. 04.17 Bh Wbyreeesesee see — 0.11 + 0. 04. 23 HY.) |) 8) dbyrie-2-- tose A — 0.26 |+ 0. 04.16 E. | 50 Draconis --.-..--!10 43 20.67 i+ 3.66 |+ 0. 10 43 25.44 |18 50 29.53 +8 07 04.09 Mean’at)18™0local'siderealitime) ---9-- =a ee ee eee a= eee eee +8 07 04.14 NORMAL EQUATIONS, + 14.00 d¢+1.93a-+ 455c=— 0.49 ot =-+ 08,14 + 1.93 6¢+824a— 7.38¢c=—14.41 a==— 15.640 + 4.55 dt — 7.38 a + 34.48 e=-+ 18.15 c=- 08.159 SALT LAKE CITY, UTAH, AUGUST 26, 1873. z Name of star. its Aa. Bb. Ce. LMS AR. S) hm 38. 8. 8. Ss he ™. 8: hm. 8. KB. | <¢ Delphini --.- ---- 12 20 07.51 |— 0.88 |+ 0.07 |-+ 0.16 |12 20 06.86 [20 27 11.01 43 07 a 15 E Groombr. 3241--.| 23 27.39 |-+ 2.92 |+ 0.23 |+ 0.51 23 31.05 30 35.19 OB Ge Chant aaa ease 30 03.66 |+ 0.15 |+ 0.11 |+ 0.22 30 04.14 37 08.39 iB. |eu Aquatite.-oneo=- 33 47.54 |— 1.37 |+ 0.05 |+ 0.16 33 46.38 40 50.55 IDG || 7a. Are Ssas 5 ease 38 47.67 |— 1.35 4+ 0.05 |+ 0.16 38 46.53 45 50.70 Weil eC yenile~=----- >: 45 24.61 |— 0.00 |4+ 0.13 |— 0.21 45 24.53 52 28.58 We 6U'Cyonit-----) 223] 12 66.5 | 29.8] 18.3 239 7 56.6 | 13.8 | 34.3 20 32.3 |-+ 2 38.4 |2.6 08, 1 250'| .19 73.6) 21.7 | 2653 290 2 06.0 | 21.9 | 26.0 19 00.4 |+ 9 09.7 |—2.4 07.7 316 14 61.2 | 25.8 | 23.2 38 5 79.6 | 27.9 | 21.6 38 18 37.0 |4+ 4 33.8 |—1.0 138 2309.8 286 ASTRONOMY. Observations and computations—Continued. LABRAN, COLORADO. Level. Corrections. No.of | Microm. : Half-sum of 5 Date. star. | readings. RS EWIESS declination. | yy5orom Latitude N. NS) panei Level. 1873. t. d. d. ad. fo} ft? “l / a a“ fo} ‘ “” August 18-...] 391 | 16 41.0 | 23.4 | 26.4 430 4°59. 3) | 22:2) | 27.9 38 29 18.5 |— 6 07.0 |—2.4 | 38 23 09.1 August 20...| 7268 6 02.9 | 23.0 | 21.6 19 18.8 |+ 3 51.7 |—1.6 08.9 7301 | 11 49.2 | 23.0 | 21.6 22 08.5 |+ 1 02.0 |—1.6 03.9 7368 | 1349.0 | 18.9 | 26.0 7385 | 21 33.6 | 23.3 | 21.8 7398 |— 1 81.0 | 21.3 | 24.0 11 10.6 |+11 58.9 |—0.3 09. 2 7417 | 13 60.0 | 14.0 | 31.2 7450 5 13.5 | 29.0 | 16.7 27 32.3 |— 4 22.9 |-1.3 08.1 7465 3 86.3 | 23.9 | 21,9 7501 | +15 07.4 | 18.0 | 27.9 28 58.3 |— 5 48.2 |—2.2 07.9 Ziazist || 1183 BY |) 2B} 53 || BBA 7545 4 37.9 | 23.5 | 22.6 16 23.4 |+ 4 45.6 |+0.4 09. 4 7567 A 74.1 23:3) | 22:9 26 18.8 |— 3 10.5 |41.3 09. 6 7590 | 14 03.9 | 22.8 | 23.2 21 29.1 J+ 1 38.3 |41.1 08.5 7605 | 10 87.3 | 25.2 | 21.0 7676 | 16 68.2 | 26.7 | 20.2 7706 3 41.2 | 18.4 | 28.0 30 01.2 |— 6 52.1 |—0.9 08. 2 7733 | 13 41.2 | 26.2 | 20.3 7754 1 49.6 | 15.6 | 31.1 17 01.7 |+ 6 10.1 |-2.6 09. 2 7778 | 13 22.6 | 15.8 | 31.2 23 05.7 |-+ 0 05.8 |—2.6 08.9 7848 5 52.0 | 19.0 | 24.4 7893 | 13 43.0 | 22.0 | 21.9 19 04.1 |+ 4 05.7 |—1.5 08.3 8115 2 12.0 | 16.0 | 27.9 8156 | 10 12.1 | 29.6 | 14.3 18 59.5 |+ 4 08.5 |+0.9 038.9 8159 | 18 57.5 | 29.8 | 14.0 14 37.8 |+ 8 31.1 |+1.] 10.0 8250} 10 92.0 | 25.0 | 20.0 8273 8 67.0. | 24.0 | 21.0 21 57.2 |+ 1 09.9 |42.2 09.3 8316 0 19.0 | 15.0 | 29.8 8324 | 17 80.2 | 29.8 | 15.0 14 00.8 |+ 9 07.0} 0.0 07.8 August 26...| 6496 4 58.5 | 26.0 | 22.0 6527 | 14 11.4 | 23.8 | 23.9 18 10.5 |+ 4 56.0 |+1.1 07.6 7301 | 11 90.8 | 15.4 | 18.0 7368 | 13 71.0 | 26.0} 7.2 22 09.8 |4 0 56.0 |+4.4 10.2 7385 | 21 50.5 | 21.0 | 12.0 7398 |— 1 37.6 | 23.7 9.5 11 12.2 |+11 50.7 |+46.4 09.3 7465 3 55.1 | 21.8 | 12.0 7501 | 15 11.7 125.2! 9.6 38 29 00.0 |— 5 59.2 |+7.0 | 38 23 07.& LATITUDE DETERMINATIONS. 287 Observations and computations—Continued. LABRAN, COLORADO. Level. Corrections. No. of | Microm. t Half-sum of P Date. star. | readings. Remarks. declination.) y;o7om BERR: N. Ss. anid rel, Level. 1873. a d. d. d. (eo) ‘ “ d “a a“ fo} ‘ “ August 26 -..} 7528 | 14 05.2} 23.3 | 11.5 7545 4 89.0 | 10.0 | 24.6 38 18 25.1 |+ 4 44.6 |—0.8 | 38 23 08.9 7567 4 61.9 | 20.0 | 14.7 7590 | 13 89.8 | 20.0 | 14.7 26 20.5 |— 3 10.1 |—1.0 09. 4 7005 10 74.0 | 13.0 | 21.8 21 30.7 |4+ 1 38.1 |—1.0 07.8 7676 | 16 68.2 | 26.7 | 20.2 7706 3 41.2 | 18.4 | 28.0 30 02.9 |— 6 42.2 |—0.9 09.8 7733 | 13 79.8 | 22.9 | 11.9 7754 1 98.0 | 11.2 | 23.5 17 03.4 |+ 6 07.1 |—0.4 10.1 T77 13 71.2 | 11.4 | 23.3 23 07.4 |+ 0 02.7 |—0.3 09.8 7798 | 17 47.4 | 17.9 | 17.0 7820 3) Gy) |) Palate) |) BKM) 15 53.9 |+ 7 12.5 |42.7 09. 1 7848 | 5 76.7 | 16.8 | 18.0 7093 | 13 65.5 | 15.9 | 19.0 19 05.8 |4+ 4 05.0 |—1.2 09. 6 7937 | 17 89.2) 16.4 | 18.9 7953 3 1250) || 212)! 13 15 28.9 |4+ 7 38.8 |41.3 09.0 7967 5 52.3 | 17.3 | 17 8003 | 16 19.0 | 15.0 | 20 17 39.5 |+ 5 31.3 |—1.6 09, 2 8036 9 69.6 | 10.5 | 25 9 8) 3 I 0 8091 | 11 05.6 | 29.7) 6.0 22 24.9 |4+ 0 42.2 |42.5 09. 6 0 5 0 4 5 8250 | 10 99.2 | 21.0 | 16.3 8273 8 69.4 | 15.0 | 23.0 21 58.8 |+ 1 11.8 |—0.9 09.7 55 9 05.9 | 21.9 | 15.8 : 65 | 10 93.9 | 11.0 | 26.4 24 09.0 |— 0 58.4 |—2.5 08. 1 80 8 19.3 | 12.0 } 25.4 22 44.2 |4+ 0 26.9 |—2 09.1 100 4 86.8 | 13.9 | 23.3 120 | 16 14.8 | 25.8 | 11.6 17 17.9 |+ 5 £0.4 |41.3 09. 6 166 | 17 73.5 | 21.4 | 16.1 189 1 90.2 | 13.0 | 24.6 14 58.9 |+ 8 11.8 |—1.7 09. 0 223 | 12 54.3 | 13.0 | 24.6 239 7 49.9 | 21.3 | 16.0 20 33.3 |+- 2 36.7 |—1.7 08.3 250 | 19 45.7 | 18.0 | 20.3 290 1 88.0 | 22.0 | 16.6 14 02.4 |+ 9 05.9 |+0.9 09. 2 316 | 14 22.5 | 22.3 | 16.0 338 5 44.0 | 10.8 | 27.8 38 18 38.9 |+ 4 32.9 |-2.9 | 38 23 08.9 288 ASTRONOMY. Observations and computations—Continued. LABRAN, COLORADO. Level. Corrections. $ No.of | Microm. a Half-sum of : DEN: star. | readings. Remarks declination. | 4); eT N. NS} SCLON hovel. and reir. 1873. état pion gee ea a pear, aw loom August 26-.-| 391 | 16 45.6 | 14.6 | 24.4 430 4 55.6 | 21.9 | 17.0 38 29 20.4 |— 6 09.9 |—1.4 | 38 23 09.1 The mean of all results is: 88° 23’ 08.97 + 0.03. The probable error of one observation is derived from all observations 9 taken two or more times on one pair, and is found to be + 0.35; therefore the probable error of the mean result will be + 0.03. ASTRONOMICAL CO-ORDINATES OF LABRAN, COLORADO. The astronomical co-ordinates resulting from these observations are:— Longitude.. 7* 00™ 258.185 or 105° 06/ 17” 78 + 0.44 west from Greenwich. Longitude.. 12 52™ 138.065 or 28° 03/ 15.98 + 0.43 west from U.S. Naval Observa- tory, Washington, D. C. Latitude ... 38° 23/ 08/.97 + 0.03 north. U. S. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN. ist Lizut. GEO. M. WHEELER, Corps or ENGINEERS, U. S. ARMY, IN CHARGE. RESULTS Or OBSERVATIONS MADE BY DR. F. KAMPF AND JOHN H. CLARK IN THE DETERMINATION OF THE ASTRONOMICAL CO-ORDINATES OF TRINIDAD, COLORADO. SEASON OF 1873. COMPUTATIONS BY Dr. F. KAMPF anp JOHN H. CLARK. 19 AST 289 i i wy TRINIDAD, COLORADO. GEOGRAPHICAL POSITION OF STATION. Longitude, 104° 30/ 01.42 + 0.30 west from Greenwich. Latitude,. . . 37° 10/ 46.53 + 0.02 north. Barometric altitude of observatory above sea-level, 5989.9 feet. Trinidad is in a large valley which is drained by Purgatory Creek, a small stream flowing to the east, in which direction the valley is open. On the north and south are high mountains, the most prominent of which is Fisher’s Peak, the west corner of whose summit is 201° 24’ from the true north, determined at the astronomical station. The town has its greatest extension from east to west. It is a settlement of about 1,200 inhabitants, the majority of whom are Mexicans. The astronomical station is situated on a hill near the surveyed line of the railroad, at the northeast corner of the township in which Trinidad lies, and about two-thirds of a mile distant from the village. METEOROLOGICAL CONDITIONS. The following is a tabulated display of the meteorological circumstan- ces that affected the occupation of this station: General direction of wind. Date. ¢ General condition of atmosphere. ae m. 60 | 8 a. m.to 4p.m. |4p.m.tol2p.m, : a.m. 1873. siya 9G) |lcessseeesoce N. W. N. W. Clear; heavy wind. 4 N.W. N.E. and 8. W. 8. W. Exceedingly warm. 5 W. N. E. N. E. and S. E. | Rain in the afternoon and at 11 p. m. 6 N. E. N. E. Changeable. | Rainy the whcle day. 7 5. E. S. W. Ss. Rainy at night. 8 Ss. W. S.W. N. W. Ruin at 6.35 p. m. 9 5. W. S. EB. N.W. Clear; heavy wind. 10 8. W. 5. W. S. W. and W., | 5.40 p.m. rain and lightning; violent wind. 11 S.W. N.W. and N. | N.E.and N.W.| Rain at 4 p. m. 12 Ss. W. N. W. Rain at 5 p. m. 13 Ss. W. 8. W. S. W. Rain at 1.50 p. m. and 5.30 p. m 14 Ss. W. Ss. W. 8. W. Clear; heavy wind 15 Ss. W. N.E. N. Cloudy at night. 16 Ss. W. Ss. W. S. W. Clear. 17 Ss. W. Changeable Save Clear; heavy wind. 18 |" NE. N. E. W. and 8. W. | Partly cloudy. 19 S. W. S. W. 5. W. Partly cloudy. 20, BEANS llSecosacocess CBee bacscoc-poesence Clear. 291 292 ASTRONOMY. OBSERVATORY.—INSTRUMENTS.—INSTRUMENTAL VALUES. These are sufficiently described in the report on Colorado Springs, date of 1874, at which station they were similar. The wire of the Western Union Telegraph Company passes directly over the monument, and was conducted into the tent by means of a loop. When this station was first occupied there was no operator at the office in Trinidad. Letters were at once dispatched to Denver and Pueblo, asking that this vacancy might be filled, but without success, as there were no men to spare. Finally an operator was obtained from Las Animas. He arrived on the 10th of September, but finding the line out of order, he had to go to repair it. This is the reason why earlier exchange was not made with Salt Lake City. Even during the time of exchanges the line was in very bad condition and would not transmit signals when the weather was rainy. Five exchanges were made: on the 13th, 15th, 16th, 17th and 18th of September. The signals sent and received on the first two of these dates were repeated at Cheyenne and Denver; on the last three days only at Cheyenne. The length of circuit by way of Ogden, at which point there was no repeater, was 875 miles. CONNECTIONS.—OBSERVERS.—COMPUTERS. John H. Clark was observer at the connected station, Salt Lake City, and Dr. F. Kampf at Trinidad. Each astronomer reduced his own notes. At Salt Lake City the weather was favorable, being cloudy but one night out of the five which were devoted to exchanges. Observations for lati- tude were made September 4, 5, 9, 10, 11 and 12. ASTRONOMICAL STATION—TRINIDAD, COLORADO—1873. 293 Tabulation of stars used for determination of time at Trinidad, Colorado, and Salt Lake City, Utah, 1873. Name of star. Lyrz o Sagittarii Draconis Aquila Vulpecule DAW™ AW DARK BOAN AD 3101 Cygni a? Capricorni cae COP Melamine B uf Tv Cygni Capricorni Cyyni m & Groombr. 3241 Cygni Aquarii Om fRSIT9NV Aa Q i ag = DoH A A Aquarii Pegasi Cephei Capricorni Pegasi Draconis SIS Bo _ ouc Pegasi Pegasi Capricorni - ..-..---.----- Wal phinit tet stoke laces Delpluniles eet paseo TRINIDAD, COLORADO. September 13. September 14. September 15. September 16. SGbliaeeeal tenes Seat Aen sca he alles SO ye ae eens Sree | ase x elle Re RO Pl Netetete ast taj et sie Mase. || RO x xX |------ Xx Bagel le X |------ x x x x x x x sosoe x x ees Sh he eed eee x x secctll| aya, le npGeae x x eee Scar | aca ee ep aatelleseeae x seeeee x x ae rear x sees x x gta Pete se Segoc0 x x SALT LAKE CITY, UTAH x ea 3 3 3 ag S re re we A onl A onl re A nl 8 5 3 3 3 5 5 = 2 2 2 2 2 2 FE z g 8 g EI g Ape eye (CREE fama ca RE al ee i=) [7] Q a [=F i=") [=F od Oo i") o o oO -*) mM wm mM mM wm mM mM pao eos pepeicel lBocace| Geer || Socane oe Seed Rees Ecco] tereor | ecrccl locas >< 4 Sea eae x peesaa| feoecee penee.|\\sooas x > x Basch Seeeo| occas) Lex x ee! x < x x ase x x > x Bee x x v2 « pe a 2c (ee x x x Sanso-|seesce sence x Sees eee ERs OS se x eee see Se i|etecel” xX og Pee |Reeeee! X setae |lbooseal leasnca| lpacaes oe Seo ed| (sogacs x Sescoe| seanos Soeets| Peres x eieferais >. aneSsosl| soca. we hoo peallscooe |lseaeas| lsaaone) boncut asemeD beets FeAl eis, | een x Se flecaacn imaceeesaees x : x SE |leasace cfasoellseses x Hoos. |leatess re ee ee Bes calhae so Saat ieee | [bas Sahl kane seeses eaece|| 3K x SS Soal|(geeee > ae ee (es ee jl tape el ae eee ete (ose cea Ae teers x 35% Sa eereac al eee Saal eee: < Noein SG lee ee Sa) eee x > \beddee sosees|boaeoellssssac >< Seg \eoeaes| asec So haseee < | eee Se fesecte x Sie listen 3 |osecics SCC aocees x x ssp eeeeete| Oa Sea eee ho aco x S20 || ees | Beecs| eeeaes seers || Sccec Sa S5cEl eseen||Sase0s >G coe ASSea oooor Peo Reon leoeoes MS Bere cle ailc ape otal atetenmpered aX 2 Wee secu) |Raeeedl smog | seemod|loe-oco secee SK scene x ye ares | smeratate:|| fotm\etmie eas a bes Sar || Soescal seeeca leaceee aoos5s x Soe ScellSeeecd fecoecd psocco toeSes 294 ASTRONOMY. Tabulation of stars, &c.—Continued. TRINIDAD, COLORADO. SALT LAKE CITY, UTAH. a = 15 5) nS 3 | a) 15 Cs) é a bond bl! rc hon! onl a Lal bel cond roa Lal Name of star. 4 he ba ba a a a ba be a ba [>] >) 2 >) o o [>] [>] >) >) >) 2 = = 2 2 2 2 2 2 2 = | g | =| | g | g | = 5 2 2 2 2 2 re) 2 2 2 2 2 =F a a = =F a a a = a IY o oO oO >) oO o od i) i) a >] n mn teat 73) 2) wm 72) 7) nm oa) RQ Gan Cephelacee- sore es seaie alee ae SM) WNasessl bsseca joreses||-ssséeleseccty|esse-||+-osse||--Sa=c 24 \Cephele. oS. 62). ssoseecre De) WSSec5e|) Senscleo= sce|lsossea| sosece|[oeense||ieceet||ssesee|lesecec|/sesccc 0! wAquarilt a san eeet ee x aE me > areal peeeenl pasecalsoasen scocor|Isseecal lec conlleasosis eu ePepasteee-se.- aac eae eee x Seg SA asses poeees) Sasa eee calecea| (assets eaten! aociocs 3) acetic see eee eee > Gi aeeetal RSE Se Sea ne WEE ame ome —-| 4-H See ee Sa || ooas| |e cel|oeecac fp EGS Se so ace saree sed eze S€ \|eseses|[s2eeee||-22zeel/2225=2 22920) sreeee||ssorec|/ss22e2) c2ceos||s2os=2 Observations and reductions for time taken at sending station. TRINIDAD, COLORADO, SEPTEMBER 13, 1873. = 5 Name of star. ate Aa. Bb. Ce. Te AR. AXING oO hm 3. a 8. 8. ham. 8: em 8: Mm.) 1a: Wei (Cyeni--- 522. 22-- 21 18 05.40 |— 0.06 |+ 0.19 |— 0.02 }21 18 05.51 |21 07 34.05 | — 10 31.46 Weil Gyeniees-seee ae 20 16. 67 0.00 |+ 0.20 |— 0.02 20 16.85 09 45.51 31.34 Wie ee Agquaniuees see 35 26.59 |— 0.27 }4 0.15 |— 0.02 35 26. 45 24 54.91 31.54 We) Ss Aquani= =--- 223 41 33.73 |— 0.£8 |+ 0.16 |— 0.02 41 33.59 31 02.00 31.59 Wo) 26 7Perasi’<--2.-.-. 57 50.63 |— 0.09 |+ 0.22 |— 0.02 57 50.74 47 19.38 31.36 Be | POMP easy sso-7- 2-2 22 05 28.00 |— 0.17 |+ 0.10 |+ 0.02 22 05 27.95 54 56. 62 31.33 Bye || 2OsCepheica-ss.5- 11 42.35 |+ 0.35 |+ 0.21 |+ 0.04 11 42.95 |22 01 11.36 31.59 KE. | 24 Cephei.-........ 17 55.16 |-- 0.71 |+ 0.29 |+ 0.06 17 56. 22 07 24.82 31. 40 BO Agnaniv pence. 20 42.13 |— 0.28 |4+ 0.07 |+. 0.02 20 41.99 10 10.56 31.43 KB. | SL Begasi .------ ==: 25 49.97 |— 0.17 |+ 0.08 |+ 0.02 25 49.90 15 18.49 31.41 B.| 3 Lacertw.....-.-.] 29 07.74 |+ 0.16 |+- 0.14 |+ 0.03 29 08. 07 18 36. 60 31. 47 BE. |G Pepasi co:2--<--- 22 45 41.66 |— 0.18 |+ 0.09 |+ 0.02 ]22 45 41.59 ]22 35 10.17 | — 10 31.42 Mean‘at/22" 007 local. .sidcreal'timé ..-2.> ease seuee cea eneae cece ee eee een eee — 10 31.44 NORMAL EQUATIONS. 0=— 049+ 12.00 + 0.72a+ 548¢ dl = -+ 08.06 0=+2.64-+ 0.72 dt-+6.42a— 8.09¢ a=— 03.39 O0=— 4.024 5.48 dt — 8.09 a + 28.26¢ c—-+ 05.02 VIMK DETERMINATIONS. Observations and reductions for time taken at sending station—Continued. TRINIDAD, COLORADO, SEPTEMBER 14, 1873. 295 a 3 Name of star. Ale Aa. Bb. Co. T’. AR. AT. a hm 8. 8. 8. ch le ie EE hm. 8. m. 8. WaleG) ee Aquilesseene ee. 20 15 19.36 |4+ 0.13 |— 0.02 |4 0.02 )20 15 19.49 |20 04 47.31 | — 10 32. 18 W.| 31o!Cygni-.....----. 21 12.01 |— 0.05 |— 0.02 |+ 0.03 21 11.97 09 39.74 32.23 W.|« Cephei.........| 23 42.03 |— 0.63 |— 0.04 |+ 0. 08 23 41.44 13 09, 26 32. 18 Well op (yf scce. cscs 28 14.26 |— 0.02 |— 0.01 |4 0.03 28 14.26 17 42.12 32.14 W.|e Delphini--.-.---- 37 42.97 |+ 0.10 0.00 |+ 0.02 37 43. 09 27 10.86 32. 23 Ww. Groombr. 3241..| 41 06.78 |— 0.40 |+ 0.04 |— 0.06 41 06.36 30 34.30 32. 06 KE 51 38.79 |-+ 0.01 |— 0.16 |— 0.02 51 38, 62 41 06. 48 32. 14 E. 53 16.80 |— 0.18 |— 0.23 |-- 0.04 53 16.35 42 44,25 32. 10 E. 21 03 €0.80 |— 0.02 |— 0.15 |— 0.03 |21 03 00. 60 52 28. 37 2. 29 E. 11 47.07 0.00 |— 0.16 |— 0.02 11 46,89 |21 01 14.71 32, 1& E. 18 06.35 |-+ 0.03 |— 0.17 |— 0.02 18 06.19 07 34.04 | * 32. 15 E. -|21 20 17.92 0.00 |— 0.20 |— 0, 03 |21 20 17.69 |21 09 45.49 | — 10 32. 20 Mean at 212 00™ local sidereal time ..---.---------. ------------ +--+ ++ e220 ------ — 10 32.17 NORMAL EQUATIONS. O=-+ 0.69 + 12.00 dt— 4.76a— 4.28¢ dt = + 05.03 =—2,42— 4.76 dt + 13,4144 17.01¢ —4 0822 = —2.47— 4.93 6t+17.01a+ 49.146 ¢=— 0%.02 TRINIDAD, COLORADO, SEPTEMBER 15, 1873. = | eI Name of star. a Aa. Bb. Ce. Te AR. Ah 5 hem 8 3. 8. 8. hm 8 hem. 8. (it OE yan wAquileoe=sene = 19 40 38.22 |+ 0.20 |+ 0.05 |— 0.01 |19 40 38.46 /19 30 05.61 | — 10 32.85 Beye iCypmilesam-- 43 36.50 |— 0.10 |+ 0.09 — 0.01 43 36.48 33 03. 60 32. 88 E. | y Aquile pect one an 50 47.94 |-+ 0.13 |4+ 0.04 |= 0. OL 50 48. 10 40 15.26 32. 84 ®. | a Aquile-----. --- 55 09.90 |-+.0.13 |-+ 0. 02 — 0. 01 55 10. 04 44 37.21 32. 83 Pelee.) Draconise--.—-- 59 10.29 |— 0.46 0.00 — 0.02 59 09. 81 48 36.88 32.93 Waltz Aquilss--------- 20 08 30.90 |+ 0.15 |+ 0.13 + 0.01 |20 08 31.19 57 58. 22 32. 97 Wa|@) Aquilae -----=- 15 20.02 |+ 0.18 |4+ 0.09 + 0.01 15 20.30 |20 04 47.30 33. 00 W.| 31o0!Cygni. .a.------ [20 20 12.42 |— 0.06 |+ 0.16 [+ 0. 02 120 20 12.54 [20 09 39.72 | — 10 32.82 Mean at 195 30™ local sidereal time... .-.- ---- -------+-----2-2rer terttr ttre — 10 32.89 _ NORMAL EQUATIONS 0 =-+ 0.57 + 8.00 dt + 0.63 a + 4.08 o dt = — 05.09 0 =— 1.20 +. 0.63 dt + 4.25a— 430 ¢ a=-+ 08.29 O= + 1.67 + 4.08 dt — 4.30 a + 18.13 © c=— 08.01 296 ASTRONOMY. = Observations and reductions for time taken at sending station—Continued. TRINIDAD, COLORADO, SEPTEMBER 15, 1873. . i} a | eI Name of star. T. Aa. Bb. Ce. AR. AT. 5 hm. 8. 8. 8. 8. lis tipe = ES Raat ies: ms ss Wile) Cyenisena. sso 21 10 53.94 |— 0.04 |— 0.07 |— 0.05 (21 10 53.78 |21 00 20.78 | — 10 33.00 Wis G Cypniccassene es 18 07.14 |+ 0.04 |— 0.07 |— 0.04 18 07.07 07 34.03 33. 04 Wiel) (Cyonie tase se 20 18.55 0.00 |— 0.07 |— 0.04 20 18. 44 09 45, 47 32. 97 W.| a Cephei eee 26 08.45 |— 0.25 |— 0.13 |— 0.07 26 08.00 | 15 35.07 ' 32. 93 Wee) Aquaritiess-s-e 35 27.94 |+ 0.20 |— 0.0L |— 0.03 35 28.10 24 54.90 33. 20 Wi 8 Copheize-.----—— 37 37.00 |— 0.45 0.00 |— 0.10 37 36. 45 27 03.29 33.16 Dey Pepasieesse ceo 48 32.43 |+ 0.14 |— 0.19 |+ 0.03 48 32.41 37 59.34 33. 07 Reni Cepheiees--a-- 50 39.93 |— 0.48 |— 0.56 |+ 0.10 50 33.99 40 06.00 32. 99 E. | #2 Capricorni ----= 56 58.08 |-- 0.23 |— 0.16 |+ 0.03 56 58.18 46 24,99 33.19 E. | 79 Draconis ..- 2 01 54.56 |— 0.57 |— 0.70 |+ 0.11 22 01 53.40 51 20.17 33.23 E.| a. Aquarii --.-- -| 09 51.30 |+ 0.18 |— 0.20 |+ 0.03 09 51.31 59 18.20 33.11 K. | x? Pegasi .----.---- 14 56.52 |-+ 0.03 |— 0.31 |+ 0.04 14 56.28 22 04 23.25 33. 03 By iee Cephelee--sa-e=- 17 03.24 |— 0.18 |— 0.49 |+ 0.06 17 02. 63 06 29. 46 33.17 He 0" Aquarite =224--=- 22 20 43.61 |+ 0.17 |— 0.23 |4+ 0.03 [22 20 43.58 22 10 10.56 | — 10 33.02 Meanat'215'30™Jocal'sidereallitim@=sssn2ss)-ee> ee ee eee ne mene esos aeee ee eee — 10 33.03 NORMAL EQUATIONS. 0=—+1.97 + 14.00 dt— 3.53a+ 3.73 ¢ dt = — 08.08 0=—3&0— 3.53 6'+12.79a— 4.706 a=-+ 05.28 0=+0.75-+4 3.73 dt— 4.70a+ 48.92¢ c=-+ 02.03 TRINIDAD, COLORADO, SEPTEMBER 16, 1873. 5 Name of star. TP, Aa. Bb. Ce. Teh, AR. AT. rs) [ein & ‘e S51 (teem 8: lie its | Ge Gos. 6b E. | y Delphini .----- 20 51 21.61 |-+ 0.10 |— 0.08 |+ 0.06 [20 51 21.69 |20 40 48.01 | — 10 33.68 E. | z ANGER RM shascas 56 24.03 |-+ 0.19 |— 0.04 |+ 0.06 56 24.24 45 50.59 33. 65 E. | » Cyeninsnee 21 03 02.01 |— 0.02 |— 0.05 |-+ 0.08 }21 03 02.02 52 23.34 33. 68 E. | 61! Cygni Syne cerooee 11 48.37 |— 0.01 |— 0.06 |+ 0.07 11 48. 37 |21 01 14.68 33. 69 DEG @yenis---sa22 18 07.59 |+ 0.03 |— 0.07 |+ 0.07 18 07.62 07 34.02 38. 60 Bis | it C@yeninsa= 22 20 19.11 0.00 |— 0.11 |+ 0.07 20 19. 07 09 45. 47 33. 60 E. | a Cepheisess---- 26 08.96 |— 0.23 |— 0.14 |+ 0,12 26 08.71 15 35.05 33. 66 EK. | B Cephei 225.222: 7 37.47 |\— 0.40 |— 0.17 |+ 0.17 37 37.07 27 03.26 33. 81 W. |e Pegasi --..---- 48 33.00 |+ 0.12 0.00 |— 0.06 48 33.06 37 59.34 33. 72 W.| 12 C€ephei-_--.-_- 50 40.17 |— 0.43 0.00 |— 0,17 50 39.57 40 05, 98 33.89 Wi.) 16 SS Rerasies.- == 57 53.05 |+ 0.06 |+ 0.01 |\— 0,06 57 53. 06 47 19.36 33.70 W.|79 Draconis .-..-. 22 01 54.50 |— 0.52 |+ 0.06 |— 0,20 |22 01 53.84 51 20.14 33.70 Win |(20) eihecasipecnse aoe 05 30.13 |+ 0.11 |+ 0.03 |— 0.06 05 30,21 54 56. 61 33. 60 W.| a Aquarii ..---.. 09 51.84 |+ 0.16 |+ 0.03 |— 0.05 09 51.98 59 18.19 33.79 W.| 27 7 Recasiie.---e- 14 12.13 |+ 0.02 |+ 0.08 |— 0.07 14 12.16 |22 03 38.41 SBE ES W.| 72? Pegasi .--.---- 22 14 56.96 |+ 0.03 |4+ 0.09 |— 0.07 |22 14 57,01 [22 04 23.25 | — 10 33.76 Mean ‘at 21> 30™ Jocal’‘sideréal time sc s<— 14.56 0.86 dt-+ 9.86 a— 11.17 c= — 20.67 5. 15 dt — 11.17 a + 33.24 c= + 20.28 ét = — 15.30 a= — 15.710 e=-+ 08.287 302 ASTRONOMY. The following tables show the corrections and rates of the chronom- eters used at Trinidad and Salt Lake City : CHRONOMETER AT TRINIDAD.—NeEcus, No. 1491. Signals sent from— Local sidereal Date. time. 1873. h. Sept. 13 22.0 Sept. 14 21.0 Sept. 15 20.5 Sept. 16 215 Sept. 17 20.5 Sept. 18 20.7 Correction of chro- | Adopted hourly nometer. rate. . lon Wa 8 Be —0O 10 31.44 + 0.033 1K) By28 alr/ + 0.034 10 32.99 + 0.031 10 33.68 + 0.026 10 34,22 + 0,028 —0 10 35.03 + 0.033 CHRONOMETER AT SALT LAKE CITY.—Nezeus, No. 1511. September 13, 1873: Salt Lake City. Trinidad September 15, 1873: Salt Lake City- Trinidad September 16, 1873; Salt Lake City. Trinidad Date Local sidereal | Correction of chro- | Adopted hourly 5 time. nometer. rate. 1873. h. lie We GB 8. Sept. 13 20.5 +8 07 01.32 -+ 0.010 Sept. 15 20.1 07 +00.79 + 0.011 Sept. 16 19.7 07 00.53 + 0,014 Sept. 17 19.7 07 00.10 + 0.023 Sept. 19 19.5 +8 06 58.70 + 0.030 Final results of longitude. Se o ome . Mean of sig- gs E 5 is ] jms oO Recorded at— _|nalssent and pimne Cortee coreeted gs og 5 received. : & of |2e| 2 Bane) 5 s a7 =) =) hom. 8. fins — Reva 8s) || \ltettee) oss 8. 3. pinid ade sees 20 34 16.97] —O 10 31.39} 20 23 45.58 Sa . Lake City...) 11 47 09.30) +8 07 01.33) 19 54 10.6% 0 29 34.95 M(rinidadss-2=. -- 20 42 10.00} —0 10 31.39) 20 31 38, 61! Salt Lake City...| 11 55 02.67} +8 07 U1. 32] 20 02 05.99 34, 62] 0.33) 34.785 Mrinidadia-ee- eee 20 32 47.59] —O 10 32.99} 20 22 14. 60 Salt Lake City...) 11 45 38.88) +8 07 00.79] 19 52 39. 67 34. 93 Mnimidadyes----)-— 20 42 40.00) —O 10 32.99} 20 32 07.01 Salt Lake City...| 11 55 31.61] +8 07 00,79] 20 02 32.40 34. 61) 0,32) 34.770 Mumidad’-s--s-2 20 32 33.19) —0 10 33.65} 20 21 59.54 Salt Lake City...| 11 45 24.25) +8 07 00.53) 19 52 24.78 34.76) @uinidad :s--2-e- 20 36 35.01] —O 10 33.65] 20 26 01.36 Salt Lake City...| 11 49 26,24] -+-8 07 00.53! 19 56 26.77] 0 29 34,59) 0.17| 34,675 CORRECTIONS AND RATES OF CHRONOMETERS. 303 Final results of longitude—Continued, ee oO ° 5 B : Mean of sig |,p. sas 33 ae Signals sent from—}| Recorded at— _|malssent and . eae Competed aes 2 | a received. ‘ " Sy fe I a as ° 3 A i) a hom 8. hem. 8. (ie tito eel UG Pe Cb 8. ch September 17, 1873: 4 mane nm id adyes sean a= 20 41 20. 08)—0-10 34.22) 20 30 45. 86 eo PLES ) Salt Lake City....| 11 54 10.86/48 07 00.09] 20 01 10.95 0 29 34.91 Minded Trinidad .-..-...-| 20 45 10. 00/—0 10 34.22) 20 34 35.78 veeed Salt Lake City....| 11 58 00. 96/8. 67 00.09] 20 05 01.05 34.73] 0.18) 34. 820 September 18, 1873: & By a Tiinidad! === -- =~ 20 55 07.55|\—0 10 35.03) 20 44 32.52 she E Se 2 Salt Lake City....| 12 07 58.35/48 06 59.38] 20 14 57.73 34.79 rincdad Giietrinidadis 2222.5 20 59 15. 00\—0 10 35.03} 20 48 39.97 s7-"-" | Salt Lake City... -| 12 12 05.92/+-8 06 59. 38] 20 19 05.30) 0 29 34.67} 0.12} 34.730 Trinidad east of Salt Lake City taken on that date by eye and ear. aerrSonucaas Ob 29™ 345,765 + 05.020. Notr.—September 16, 1873, has the weight 4; the observations for time at Salt Lake City were The signals were repeated on the 13th and 15th of September at Denver and Cheyenne; the last three days they went through to Cheyenne; therefore the difference in the wave-time. Mean places of stars for 1873.0 used for determination of latitude of Trinidad, Colorado. Nou Approximate Nin Se Approximate No. of pair. B.A.G, | Mghtascen- | Declination. | No. of pair. | 5 A.@,| Tight ascen- | Declination. i Pa as sion. ee sion. h. m. 8. Ova | h. m. 8 ORF gt ' 6731| 19 32 42 | 44 2456.3 || 46 7598 21 42 06 | 48°43 20.7 pana 6740 34 21| 29 51 42.0 || 16---------9| 627 4717 | 25 19 41.8 5 6762 38 43 | 26 49 58.6 || 1 5} 7641 50 45 | 11 28 27.5 spo ap ee 6799 43 44 | 47-35 40.5 | emg) 7688 53 04] 63 01 16.3 6827 48 04 | 23 45 01.9 | 76 59 46 | 59 11 57.7 Opec eae: } 6865 53 17] 50 33 42.5 || 18--------- ; 7742 2205 43| 15 24 56.0 aise ee) | Roe) ww me) WE) a a a 7796 15 16| 11 33 57.3 : 6912| 20 01 25| 23 14 58.4 || op 7810 17 58| 66 03 54.9 J Sop cea? 6959 09 00 | 51 04 56.4 || 20--------- 7833 22 48| 8 28 52.7 6990 13 06 | 37 38 20.8 | y, 7865 28 06 |- 0 03 24.1 Sec nos} 7006 15 03 | 26 44 01.3 || 2!---------9| 7907 34 29| 74 42 41.4 \ ae §| 7061 92.52) 3801 27.5 | oy 8010 53 42 |— 9 33 35.7 t) Fi60 33 19| 14 OF 50.3 | £030 5329] 49 21 43:4 ‘ ro) a e . Rk De Sigetee oa 3} i176 37 36 | 60 02 47.6 |) 23--------- 3] S052 23 00 56 | 24 46 59.5 SP oe 7198 40 24] 46 50 12.6 8070 03 07 | 7 59 20.5 ) 725 49 08 | 27 34 33.1 || 24---+---- } 8077 04 55 | 66 33 09.38 HD 2228 A é| 7268 51 33| 46 55 54.0 || 9. 8110 11 18| 44 2825.3 ia 7320 58 09 | 38 U9 23.7 || 22--------- 813 14.36 | 29 43 19.8 feet 7337 | 21 01 15 | 38 07 27.8 | og B152 17 00 |—_0 24 20.9 7373 “05 20] 36 0G 36.2 || 25---------5] 187 24 3, a 7401 13 26] 55 15 54.4 8206 27 39 | 30 37 27.6 opSSSa eae 7418 1613] 19 15 43.2 || 97......... 8223 31 20| 43 43 37.0 A 7448 19 43 | 51 0G 42.3 | 8.0 | Bear 34 09 | 43-37 51.6 Sosee Sao 7474 2411 | 23 05 00. £256 3 98 39 30, ae 7489 87 11| 52 03 36.3 || 29------->- ; 8261 | 2339 45 | 45 42 55.1 ES ERIS Er, ; 7585 21 40 13 | 22 21 52.7 304 ASTRONOMY. Mean places of stars for 1873.0—Continued. No. in | 4Pproximate | No. in | Approximate No. of pair. ‘aq | right ascen- | Declination. || No. of pair. . right ascen- | Declination. eae sion. Boa ” sion. h. m. 8. Os hom. 8. Ol ES 30 8277 23 42 31) 6410 16.1} 4) 416 117 32'| 59 34 27.0 Saree 8300 | AGIOS'|| MLO MUAR 27535 || cerceone aan 453 2441 | 14 41 25.1 31 ; 8338 5416] 61 28 14.4 476 28 57 | 14 00 40.0 crs ato a 8370 59°10 || 12 41 21-3) 42522. - -o é 509 34 03 | 59 54 19.4 39 4 2 Andromede. bears ceac 515 34 45 | 59 54 33.7 Den nannne-} 13 0 03 28] 45 41 03.6 || 44.......-- Gr. 374 36 42 | 45 30 03.2 33 48 10 20 1S 12 sore 4oeee ee aoe 540 40 01 | 45 35 46.4 a 80 17 43 | G1 07 37.6 | 569 45 51 | 28 57 32.7 34 5 121 24 46 | 53 49 15.2 |! ye 600 52 38] 71 48 18.4 oe aay 168 827455) 120 Satodeds|||) ares aumee 631 56 25 2 44 18.7 prosomoscas 182 35 13 | 58 03 24.6 | yo 650 200 48 | 17 25 24.2 223 AZ 185) G15 1623i\|\hannae eens 658 02 39 | 57 02 42.2 Be saae onsc 244 47 28 | 5817 04.3 |) 48......... 686 06 49 | 19 01 06.0 By eee eons 270 51 44 6 09 265 || 49. ----2--- 712 12 05 | 19 06 19.9 38). 62 eso 293 57 02 6 04 57.7 721° 21331) 55 15 47.3 327 1 02 05) 58 06 07.6 SW eacbscess 349 04 40] 29 24 53.4 (Meee = ccoose 308 06 00} 29 23 25.0 404 11452) 44 51 44.8 Observations and computations for latitude. TRINIDAD, COLORADO. Level. Corrections. No.of | Microm. Half-sum of . Date. star. | readings. Remarks. | Geclination. Micron ee N. 8. Atl ae Level. 1873. 1. d. d. d. oO / “l i “ “ ° 4 ou September 4 6731 7 59.6 | 20.3 | 19.3 | Heavy wind 6740 | 11 90.5 | 21.0 | 18.9] fromsouth; | 37 08 31.1 |4 2 13.8 |+0.9 | 37 10 45.8 tent partly 6762 7 83.9 | 21.3 | 18.8] closed. 6799 | 12 27.2 | 21.5 | 18.3 13 01.5 |— 2 17.7 |41.6 45.4 6827 | 10 97.7 | 24.6 | 16.2 6865 8 66.0 | 17.0 | 22.8 09 34.1 |+ 1 12.0 |40.7 46.8 6883 | 10 75.0 | 21.3 | 18.2 6895 9 79.9 | 19.0 | 21.0 10 16.2 |+ 6 29.5 |4+0.3 46.0 6912 | 10 97.5 | 21.0 | 19.0 6959 9 71.4 | 12.9 | 27.3 10 09.4 |+ 0 39.2 |-3.4 45, 2 6990 | 11 05.0 | 22.0 | 18.3 7006 9 90.5 | 13.5 | 26.9 11 23.6 0 35.6 |-2.6 45.4 Changed in- 7160 | 15 14.7 | 25.9 | 16.0 clination. 7176 4 99.0 | 11.0 | 31.0 05 33.6 |+ 5 15.5 |-2.8 46.3 7198 8 76.1 | 17.8 | 24.7 12 38.4 |— 1 45.9 |—2.7 46.8 7256 5 35.1 | 19.8 } 22.8 7268 | 14 29.5 | 19.0 | 23.6 37 15 26.1 |— 4 37.8 |-2.1 | 37 10 46.2 LATITUDE DETERMINATIONS. 305 Observations and computations—Continued. TRINIDAD, COLORADO. Level. Corrections. No. of | Microm. Role eae | ———$—$— : Date. star. | readings. Remarks. declination. Micron Latitude. N. iS} malaise, Level. 1873. ie Ue d. d. OB Ue atl fi | ee ae te September 4 7320 8 81.4 | 19.0 | 23.4 37 08 13.9 |-+ 2 34.2 |—0.2 | 37 10 47.9 7337 7 07.9 | 17.9 | 24.6 07 19.1 |+ 3 28.1 |—0.9 46.3 7373 | 13 78.0 | 23.4 | 19.8 7401 | 14 98.9 | 20.3 | 22.9 7418 4 91.6 | 18.3 | 25.1 16 01.2 |— 5 12.9 |—2.6 45.7 * 7448 5 69.1 | 23.0 | 20.3 7474 | 14 84.9 | 17.0 | 26.3 06 03.8 |+ 4 44.5 |—1.8 46.5 7489 | 12 01.0 | 18.0 | 25.3 7585 7 94.2 | 17.9 | 26.0 12 57.1 |— 2 06.4 |—4.2 46.5 7598 0 20.5 | 19.0 | 24.8 7627 | 17 70.0 | 22.4 | 21.2 01 43.9 |+ 9 03.4 |—1.3 46.0 7641 4 63.2 | 27.0} 16.9 7658 | 12 85.8 | 13.9 | 29.8 15 03.8 |— 4 15.5 |—1.6 46.7 7696 | 18 37,8 | 20.0 | 23.7 7742 3 20.6 | 18.9 | 24.9 18 39.1 |— 7 51.2 |-2.7 45.2 7766 (HS) || PZB) PAS) 7796 | 13 65.2 | 21.0 | 22.9 07 05.9 |+ 3 40.5 |-0.5 45.9 7810 | 14 92.6 | 21.0 | 23.0 7833 3 65.6 | 23.3 | 20.8 16 35.6 |— 5 50.0 /+0.1 45.7 7865 0 79.0 | 26.4 | 17.9 7907 | 18 29.3 | 19.6 | 24.7 19 49.6 |— 9 03.6 |+0.9 46.9 8036 3 71.4 | 15.0 | 29.0 8052 |" 15 72.3 | 27.0) 17.0 04 33.6 |+ 6 13.0 |—1.1 45.5 8110 4°71.0 | 21.4 | 22.8 8133 | 13 83.0 | 19.3 | 24.9 06 04.6 |+ 4 43.3 |—1.9 46.0 8152 | 16 60.1} 24.9} 19.4 8187 BLOl ON see) S056 03 47.4 |+ 7 02.1 |—3.1 46.4 8206 | 12 22,2) 15.0 | 29.7 8223 | 12 09.0 | 24.8 | 20.3 10 44.1 |+ 0 04.1 |-2.8 45.4 8237 6 52.9 | 24.6 |} 20.5 07 51.4 |+ 2 56.8 |—2.9 45.3 8256 9 32.6 | 19.5 | 25.0 8261 | 10 59.1 | 27.6 | 17.0 11 24.4 |— 0 39.3 |41.4 46.5 8277 | 11 35.1 | 21.0 | 23.6 8300 4 S208 |) 20.9) || ddd 12 33.0 |— 1 49.4 |4+1.8 45.4 8338 5 10.3 | 21.7 | 23.4 8370 | 16 29.4 | 21.8 | 23.4 04 59.1 |+ 5 47.6 |—0.9 | 45.8 4| 17 35.4 | 25.0 | 20.2 13 1 10.4 | 17.0 | 28.4 02 24.0 |+ 8 24.7 |—1.8 46.9 48 | 10 90.0 | 23.3 | 22.2 80 9 12.8 | 22.0 ! 23.4 37 10 19.3 |+ 0 27.1 '—0.1 ! 37 10 46.3 306 ASTRONOMY. Observations and computations—Continued. TRINIDAD, COLORADO. Level. | Corrections. No.of | Microm. Half-sum of ss Date. star. | readings. Remarks. declination. iveranis Latitude. N. S and refr. Level. 1873. 1. d. d. d. (oe) uN FH} “ rote Af L September 4 121 | 10 02.8 | 26.7 | 19.0 | 168 8 16.5 | 15.0 | 30.7 37 11 46.9 |— 0 57.9 |—2.2 | 37 10 46.8 182 3 86.7 | 21.8 | 24.2 09 30.9 |+ 1 17.2 |—1.8 46.3 223 (Sb. il |) BILO || 2D 244 | 17 09.0 | 22.9 | 23.3 16 20.5 |— 5 33.6 |—1.2 45.7 270 9 68.7 | 25.8 | 20.2 07 57.1 |+ 2 52.0 |-2.8 46.3 293 | 14 03.2 | 25.8 | 20.3 05 42.7 |-+ 5 06.9 |—2.8 46.8 327 4 15.0 | 15.2 | 31.0 349 | 10 93.5 | 23.2 | 23.0 08 28.9 |+ 2 18.8 |-2.1 45.6 358 | 12 35.0 | 23.0 | 23.2 07 44.7 |+ 3 02.8 |-2.2 45.3 404 6 46.6 | 19.1 | 27.0 416 Vi Sl ete bee os) 453 | 12 58.9 | 13.7 | 32.8 37 08 05.8 |+ 2 42.6 |—2.6 45.8 76 | 22 69.8 | 22.6 | 24.0 509 |— 2 67.0 | 22.5 | 24.6 36 57 39.2 |+13 07.9 |—1.0 46.1 515 |— 2 43.8 | 22.2 | 24.9 36 57 46.3 |+13 00.7 —1.1 45.9 Gr. 374 6 36.1 | 20.2 | 27.0 37 13 57.0 |— 3 06.8 |—3.2 47.0 540 11 92.0 | 20.8 | 27.0 . 1 48.5 |— 5 59.5 |-3.1 45.9 569 0 34.6 | 21.7 | 26.7 650 5 97.2 | 24.2 | 25.3 658 || 12 55.2 | 24.0 | 25.7 14 11.3 |— 3 24.4 |—0.8 46.1 686 | 13 11.9 | 24.4 | 25.4 08 35.1 |+ 2 13.0 |—1.4 46.7 712 8 09.2 | 24.3 | 25.8 11 11.9 |— 0 23.2 |—1,.5 47.2 721 8 83.7 | 23.0 | 27.0 September 5 6731 7 66.9 | 17.0 | 21.9 | Wind N.E.; k 6740 | 11 97.1} 28.0 | 10.9 modeiate. 08 31.3 |+ 2 13.6 |43.3 48.2 762 7 92.0 | 20.0 | 18.9 799 | 12 19.3 | 15.0 | 23.9 13 01.7 |— 2 12.7 |-1.9 47.1 6827 | 10 33.0 | 20.2 | 19.0 6865 7 BRS3 |) Web) || rhs} 09 34.3 |+ 1 14.4 |—-0.6 48.1 6883 9 92.0 | 18,9 | 20.8 6895 8 90.0 | 18,0 | 21.4 10 16.4 |+ 0 31.7 |—1.5 46.6 6912 | 11 02,2 | 22.3} 17.2 6959 9 71.3 | 11.0 | 28.4 10 09.6 |-- 0 40.7 |—3.4 46.9 6990 | 11 13.4 | 17.4 | 22.2 7006 | 10 05.4 | 17.2 | 22.4 11 23.7 |— 0 33.5 |-2.8 47.5 7061 | 14 66.4 | 15.8 | 23.9 7084 418.6 | 23.2]16.3) Through 16 12.9 |— 5 25.4 |—0.3 47.2 clouds. September 9 7766 6 28.8 | 15.5 | 23.3 | Very cold; 7796 | 13 43.7 | 19.8] 19.0 | heavy wind | 37 07 06.1 |+ 3 42.1 |—1.9 [37 10 46.3 ; from south. LATITUDE DETERMINATIONS. Observations and computations—Continued. Level. No.of | Microm. ate star. | readings. N. S 1873. t, d. d. d. September 9 7810 | 14 88.5 | 22.7 | 15.3 7333 3 67. 13.6 | 26.0 7865 1 21.0 | 22.0] 17.2 7907 | 1851.8] 6.0 | 33.5 8010 | 16 91.3 | 23.3 | 16.4 8026 2 68.5 | 20.0 | 19.6 8036 3 30.5 | 19.1 | 20.3 8052 | 15 27.2 | 20.7 | 18.8 8110 4 70.0 | 16.6 } 23.0 |- 8133 | 13 72.4 | 25.0 | 14.5 8152 | 16 46.0 | 21.8 | 18.0 8157 2 90.17} 14.1 | 25.5 8206 | 12 56.2 | 22.8 | 17.0 8223 | 12 49.1 | 14.7 | 25.0 8237 6 91.9 | 14.0 } 25.9 8256 9 22.8 | 21.9 | 18.0 8261 | 10 40.5 | 14.5 | 25.4 8277 | 11 12.2 | 21.8 | 18.2 8300 7 58.1 | 22.0 | 18.0 6338 4 35.0 | 19.0 |} 21.3 8370 | 15 55.2 | 18.5 | 22.0 4| 17 67.8 | 21.4 | 19.0 13 S055 75198) 2207, 48 9 47.0 | 20.3 | 20.3 80 8 68.9 | 23.7 | 17.0 121 9 82.1 | 19.0 | 21.9 168 7 83.0 | 24.5 | 16.6 182 3 52.3 | 17.8 | 23.5 223 5 87.4 | 27.0 | 14.6 244 | 16 66.9 | 13.0 | 28.5 270 9 94.8 | 24.0 | 17.4 293 | 14 30.4 | 24.0 | 18.0 327 4 51.0 | 16.0 | 25.5 349 | 10 88.4 | 23.0} 18.8 358 | 1228.4 | 23.0 | 18.9 404 6 44.6 | 15.0 | 26.0 416 6 22.6 | 17.5 | 24.3 453 | 11 30.7 | 26.4 | 15.9 307 TRINIDAD, COLORADO. Corrections. ee Half-sum of ogee Remarks. declination: “ae Latitude. and refr. Level. @). vf “ 1 u“ “ (oy fh ae 37 16 35.8 |— 5 48.3 |-1.4 |37 10 46.1 19 50.7 |— 8 57.6 |—6.2 46.9 Changed in- clination. 03 23.0 |-+ 7 21.9 |4+2.0 46.9 04 35.0 |+ 6 11.7 |+0.1 46.8 06 06.0 |+ 4 40.3 |41.1 47.4 03 48.6 |-+ 7 01.1 |—2.1 47.6 10 45.5 |+ 0 02.2 |—1.2 46.5 07 52.8 |+ 2 55.3 |—1.7 46. 4 11 25.7 |— 0 36.6 |—1.9 47.2 12 34.3 |— 1 50.0 |42.1 46.4 05 00.4 |+ 5 47.9 |—1.6 46.7 02 25.3 |-+ 8 22.3 |—0.7 46.9 10 20.5 |+ 0 24.3 |41.8 46.6 11 48.2 |— 1 01.8 |+1.4 47.8 09 32.3 |+ 1 13.0 |41.8 47.1 16 21.9 |— 5 35.3 |—0.9 45.7 07 58.2 |+ 2 48.9 |—0.8 46.3 05 43.9 |-+ 5 04.2 |—1.0 47.1 08 30.2 |+ 2 17.8 |—1.6 46.4 07 46.0 |+ 3 01.3 |—-1.7 45.6 37 05 07.0 |4 2 37.8 41.0 | 37 10 45.8 308 ASTRONOMY. Observations and computations—Continued. TRINIDAD, COLORADO, Level. Corrections. No. of | Microm. Half-sum of E Date. star. | readings. Remarks. declination. microns Latitude. Bh . and refr. Level, 1873. Sah d. d. Oa et AD FEN OEE September 9 476 | 22 20.2 | 24.0 | 18.0 509 |— 3 09.5 | 17.4 | 24.6 36 57 40.3 |+13 05.7 —0.3 | 37 10 45.7 515 |— 2 85.0 | 17.4 | 24.6 36 57 47.4 |+12 58.4 |0.3 45.5 Gr. 374 6 21.6 | 16.3 | 25.6 37 13 58.2 |— 3 10.7 0.5 47.0 540 | 11 74.9 | 16.0 | 25.9 49.7 |— 6 02.6 —0.7 46.4 569 0 07.6 | 24.7 | 17.3 650 6 03.0 | 22.4 | 20.0 658 | 12 73.8 | 25.0 | 17.4 14 12.8 |— 3 28.4 +2.8 47.2 686 | 13 21.3 | 22.0 | 20.3 08 36.1 |4+ 2 11.5 |—0.7 46.9 712 8 18.6 | 22.0 | 20.3 11 13.0 |— 0 24.7 |-0.7 47.6 721 8 98.0 | 19.0 | 23.4 September 10 8110 5 15.0 | 21.0 | 20.3 | Very heavy 8133 | 14 24.5 | 17.3 | 24.2] wind from 06 06.2 |4+ 4 42.5 |—1.7 47.0 S.E.; partly 6152 | 16 27.0 | 23.3] 18.4] cloudy. 8187 278.7 | 16.0 | 25.9 03 48.8 |+ 6 58.8 |-1.4 46.2 8206 | 12 24,2 | 21.0 | 21.0 8223 | 12 11.8 | 17.0 | 24.9 10 45.8 |+ 0 03.9 |—2.2 47.5 8237 6 59.5 | 16.1 | 25.8 07 53.1 |+ 2 55.4 --2.7 45.8 8256 9 90.2 | 22.3 | 19.7 8261 | 11 15.3 | 19.0 | 23.0 11 26.0 |— 0 38.9 —0.4 46.7 8277 | 11 08.5 | 13.9 | 28.0 2300 7 67.0 | 26.0 | 16.0 12 34.5 |— 1 46.1 |-1.1 47.3 8338 4 25.7 | 19.9 | 22.0 8370 | 15 41.7 | 20.0 | 21.9 05 00.6 |+ 5 46.6 |—1.1 46.1 4) 17 91.9 | 20.8 | 21.2 F 13 1 86.6 | 26.6 | 15.4 02 25.6 |+ 8 18.6 |+3.0 47.2 48 | 10 27.4 | 23.3] 18.8 80 9 34.8 | 14.0 | 27.9 10 20.7 |-+ 0 28.8 |—2.6 46.9 121 9 62.9 | 13.6 | 28.3 168 7 61.3 | 30.8 | 11.4 11 48.5 |}— 1 02.6 |41.3 47.2 182 4 25.0 | 19.0 | 23.0 | Thro’ clouds. 223 6 55.3 | 27.9 | 14.4 09 32.6 |+ 1 11.5 |42.6 46.7 244 | 17 38.4 | 15.3 | 27.0 16 22.1 |— 5 36.4 40.5 46,2 270 9 81.6 | 26.3 | 16.0 | Thro’ clouds. 07 58.4 |+ 2 45.8 |4+2.2 46.4 293.| 14 15.7 | 26.4 | 16.0 05 44.1 |+ 4 60.6 |42. 46.9 327 4 47.9 | 20.0 | 22.3 349 | 10 88.1 | 23.0 | 19.3 08 30.4 |+ 2 17.8 |—1.9 46.3 358 | 12-29.0 | 23.4 | 19.0 07 46.2 |4+ 3 01.6 |—1.7 46.1 404 6 44.5 | 15.9 | 26.4 416 7 Ubs (0) |) TEER ps 453 | 12 20.5 | 26.21 16.2 37 08 07.2 | 2 37.0 [41.4 37 10 45.6 LATITUDE DETERMINATIONS. 309 Observations and computations—Continued. TRINIDAD, COLORADO. Level. Corrections. No. of | Microm. cS Half-sum of é Date. star. | readings. Remarks. declination. Micron Latitude. N. Ss} andeche Level. 1573. i ae d. d. Oh ts f a LES} Olas uw September 10 476} 22 41.0 | 26.0 | 16.3 509 |— 2 94.8 | 13.7 | 28.6 36 57 40.5 |+13 07.6 |—1.4 |37 10 46.7 515 |— 2 68.5 | 13.7 | 23.6 57 47.6 |+12 59.5 |—1.4 45.7 Gr. 374 6 33.8 | 19.8 | 22,2 13 58.4 |— 3 10.8 |—1.7 45.9 540} 11 86.9 | 19.8 | 22.3 16 49.9 |— 6 02.6 |—1.7 45.6 569 0 19.6 | 19.3 | 22.9 650 7 46.4 | 18.3 | 23.7 658} 14 18.1 | 28.6 | 13.3 14 13.1 |— 3 28.6 |4+2.7 47.2 686 | 13 27.9 | 22.3 | 19.6 08 36.3 |+ 2 07.3 |+2.9 46.5 712 8 27.0 | 21.9 | 20.2 11 13.2 |-- 0 28.3 |42.6 47.5 721 9 18.0 |) 25.0 | 17.1 Air undulat- September 11 7448 5 11.9 | 18.0 | 27.7 | ing; wind 7474) 1417.8 | 29.9] 15.8] from E.NE., 06 05.4 |+ 4 41.4 |+1.2 48.0 moderate. 74e9 | 12 40.2 | 28.0 | 18.0 7585 8 19.7 | 17.0 | 30.2 12 58.7 |— 2 10.6 |—0.9 47.2 7598 1 04.3 | 19.2 | 27.8 7627 | 18 35.0] 31.9 | 15.8 01 45.6 |+ 8 57.6 |4+2.1 45.3 7641 5 29.0 | 28.6 | 19.0 7658 | 13 60.0 | 16.C | 31.6 15 05.4 |— 4 18.1 |—1.6 45.7 7696 | 18 45.5 | 24.0 | 24.3 7742 3 12.0 | 28.5 | 20.0 18 40.7 |— 7 56.3 |42.3 46.7 7766 LON 2bea| Zand 7796 | 14 21.5 | 20.3 | 29.0 07 07.5 |4+ 3 40.8 |—1.8 46.5 7810 | 14 83.8 | 22.4 | 27.0 7833 3 61.0 | 24.3 | 25.2 16 37.2 |— 5 48.7 |—1.5 47.0 7865 1 20.1 | 24.8 | 25.0 7907 | 18 63.5 | 19.3 | 30.6 19 51.2 |— 9 01.5 |—3.2 46.5 Changed 8010 |} 16 77.9 | 23.0 | 19.8 length of 8026 2 50.4 | 21.0 | 21.8 bubble. 03 23.4 |+ 7 23.4 |+0.7 47.5 8036 ATS9o 2) |p ellag |21 0) 8052 | 16 49.0} 11.6 | 31.0 04 35.5 |+ 6 15.8 |—5.1 46. 2 8110 5 26.0 | 20.9 | 22.1 8133 | 14 44.2 | 12.3 | 30.9 06 06.5 |+ 4 45.2 |—5.5 46.2 8152 | 16 71.0 | 24.3 | 19.0 : SIS aero Lea |eluleo) |poenO 03 49.0 |-+ 7 01.6 |—4.1 46.5 Changed in- 8206 | 12 05.0 | 21.0 | 22.9 clination. a 8223 | 12 08.9 | 25.1] 12.8 10 46.0 |— 0 01. a 46.0 2. “109 + _ 2125.2118.8 36 07 53.4 14 2 51.7 |41.2 137 10 46.3 310 ASTRONOMY. Observations and computations—Coutinued. TRINIDAD, COLORADO. | Level. Corrections. No. of | Microm. Half-sum of = Date. star. | readings. : Remarks. declination. Ruivenarn Latitude. N. s andrete Level. 1873. t. d. d. d. fo} / “ / a“ a“ fe} ‘ a“ September 11 8256 9 79.9 | 22.8 | 21.3 8261 | 11 21.0} 30.8 | 13.8 37 11 26.2 |— 0 43.8 |+5.1 | 37 10 47.5 8277 | 12 11.3 | 19.6 | 25.0 8300 8 50.2 | 31.9 | 13.0 12 34.8 |— 1 52.2 |43.7 46.3 k 8338 BH LOR4L | 2257 9953) 8370 | 16 25.0 | 27.3 | 17.5 05 00.9 |+ 5 43.4 |42.8 47.1 4| 18 08.0 | 21.8 | 93.6 | 13 2707.0) || 3053") 1588) 02 25.8 |-+ 8 17.3 |+3.5 46.6 Changed in- 48 | 10 24.6 | 22.0 | 24.0 | clination. 80 9 48.0 | 26.6 | 19.3 10 21.0 |+ 0 23.8 |41.5 46.3 | PAL |) WO) 27255) Be 7/ |) e283 168 8 20.1 | 26.9 | 19.0 11 48.7 |— 1 02.9 |-2.0 47.8 182 4 04.6 | 21.6 | 24.6 | 223 6 51.5 | 18.3 | 22.0 | 09 32.8 |+ 1 16.7 |—3.5 46.0 | 270 | 10 30.0 | 26.5 | 19.4 07 58.7 |+ 2 50.4 |-2.6 46.5 293 | 14 65.8 | 27.0 | 19.0 05 44.3 + 5 05.8 |-2.3 47.5 327 4 81.3 | 14.8 | 31.3 349 | 10 70.8 | 25.0 | 21.0 08 30.7 |+ 217.3 |—-1.4 46.6 358 | 12 10.9 | 25.8 | 20.2 07 46.5 |+ 3 00.8 |—1.0 46.3 404 6 28.8 | 18.7 | 27.9 416 6 72.9 | 20.0 | 26.4 453 | 11 75.5 | 31.0 | 15.8 37 08 07.4 |4+ 2 36.1 42.4 45.9 476 | 22 54.0 | 29.8 | 17.0 509 |— 2 84.3 | 11.0 | 33.8 36 57 40.7 |+13 08.4 |—3.3 45.8 515 |— 2 60.0 | 11.0 | 35.8 36 57 47.9 |413 00.9 |—3.3 5.5 Gr. 374 6 62:1 | 2353) |) 23.5 37 13 58.7 |— 3 10.7 |-1.8 46. 2 540 | 12 14.2 | 23.0 | 23.5 16 50.2 |— 6 02.1 |-1.9 46.2 569 0 48.3 | 20.0 | 26.3 650 5 92.3 | 25.6 | 21.0 658 | 12 46.8 | 16.0 | 30.5 14 13.3 |— 3 23.3 |-2.7 47.3 712 8 08.0 | 27.7 | 19.6 721 8 64.0 | 14.3 | 33.0 11 13.4 |— 0 23.6 |-2.9 46.9 September 12 7810 | 14 91.0 | 20.2 | 189 | Heavy wind 7833 3 56.0 | 20.3 | 19,0] from S. W. 16 37.4 |— 5 52.5 40.7 45.6 7865 | 1 20.0 | 23.3 | 16.1 7907 | 18 83.2 , 21.5 | 17.8 19 51.4 | 9 07.7 |-++3.0 46.7 4036 ST UBIO LESS ear fr, 8052 | 15 53.2 | 34.4 4.7 04 35.7 |+ 6 07.5 |4+3.7 46.9 8110} 4 96.0} 16.1 | 22.9 { 8133 | 13 90.6 | 27 11.4 37 06 06.8 ly 4 37.9 |42.6 | 37 10 47.3 LATITUDE DETERMINATIONS. 311 Observations and computations—Continued. TRINIDAD, COLORADO. Level. Corrections. No. of | Microm. Half-sum of : Date. star. | readings. Remarks. declination. Micron Latitude. N. Ss Baal ae Level. 1873. ty ds d. d. O) 1 ee ee Us Oe September 12 8152 | 16 70.5 | 23.3 | 15.9 8187 3 20.5 | 138.8 | 25.5 37 03 49.3 |+ 6 58.4 |—1.2 | 37 10 46.5 8206 | 12 20.3 | 23.6} 15.8 8223 | 12 20.9 | 15.5 | 23.9 10 46.3 |— 0 00.2 |—0.2 45.9 8237 6 65.0 | 15.5 | 24.0 07 53.6 |-+ 2 52.5 |—0.2 45.9 8256 9/1750) | 2250 | 1755, 8261 | 10 54.7 | 23.3 | 16.2 11 26.5 |— 0 42.8 |+3.2 46.9 8277 | 11 20.8 | 16.4 | 23.1 8300 7 49.9 | 33.3] 6.2 12 35.0 |— 1 55.2 |+5.6 45.4 8338 4 51.9 | 19.3 | 20.2 8370 | 15 53.2).| 26.9 | 12.8 05 01.1 |+ 5 42.1 |43.6 46.8 4]| 17 79.6 | 26.3 | 13.3 13 1 69.0 | 12.8 | 27.0 02 26.1 |+ 8 20.3 |—0.3 46.1 48 | 10 61.0 | 26.5 | 13.3 80 ON yigeal |) wakes) |) ee) 10 21.2 |+ 0 26.4 |—-0.8 46, 8 121 9 80.7 | 20.0 | 19.8 168 80a) | Lee | 2226 11.49.0 | — 1 00.4 |—1.4 A7.2 102 4 09.0 | 17.4 | 22.4 09 33.1 |-+ 1 14.2 |-0.6 46.7 223 6 48.0 | 21.3 | 18.6 244 | 17 37.0 | 21.0 | 18.7 16 22.6 |— 5 38.2 |41.4 45.8 270 9 88.9 | 24.5 | 15.2 07 58.9 |+ 2 48.1 |—0.3 46.7 293} 14 22.5 | 24.4 | 15.3 05 44.5 |-+ 5 03.0 |—0.3 47.2 327 4 46.9 | 14.7 | 25.0 416 6 73.9 | 19.3 | 20.5 453 | 11 91.9 17.1 | 22.8 37 08 07.6 |4+ 2 40.9 |—1.9 46.6 476 | 22 51.9 | 21.0] 18.9 509 |— 2 65.4 | 24.1 | 15.8 36 57 40.9 |+13 01.9 |42,8 45.6 515 |— 2 40.7 | 24.1 | 15.8 36 57 48.1 |4+12 54.2 |4+2.8 45.1 Gr. 374 6 75.8 | 18.7 | 21.2 37 13 58.9 |— 3 12.7 |4+1.2 47.4 540 | 12 29.0 | 18.8 | 21.0 16 50.4 |— 6 04.6 |+1.3 47.1 569 0 55.3 | 23.3 | 16.5 650 6 33.3 | 24.5 | 16.0 658 | 13°03.5 | 19.5 | 21.3 14 13.5 |— 3 28.2 |41.8 47.1 686 | 13 49.6 | 23.3 | 18.0 08 36.7 |-+ 2 07.5 |4+2.3 46.5 712 8 47.6 | 22.1 | 19.0 37 11 13.6 |— 0 28.4 |+1.7 [37 10 46.9 721 9 39.0 | 22.0 | 18.9 312 ASTRONOMY. In addition to the above, some observations were taken on pair 8070 and 8077 and pair 600 and 631. The results agree very well, but the star- places seem to be bad or wrong. Nevertheless, the observations and results are inserted here, so that they may be used when better star-places are found :— Level. Corrections. No.of | Microm. Half-sum of . Date. star. | readings. Remarks. declination. Moron Latitude. N. Ss. anidirate Level. 1873. (ee Gh d d. Rall Leal MEN Oe el September 4 8070 4 33.0 | 26.2 | 17.9 8077 | 15 27.8 | 15.0 | 29.0 37 16 26.5 |— 5 40.0 |--1.6 |37 10 44.9 600} 15 51.8 | 30.2 | 18.6 631 4 45.2 | 16.6 | 32.8 16 24.8 |— 5 43.7 |-1.3 39.8 September 9 £070 4 29.7 | 24.0] 15.5 8077 | 15 24.7 | 10.9 | 28.7 16 27.7 |— 5 40.1 2.6 45.0 600 | 15 30.6 | 20.0 | 22.3 631 4 22.8 | 18.9 | 23.7 16 25.9 |— 5 44.1 |—1.7 40.1 September 10 600 | 15 73.0 | 17.7 | 24.4 631 4 50.1 | 27.2 | 14.8 16 26.2 |— 5 48.8 |+1.6 39,1 September 11 8070 4 77.0 | 25.5 | 17.1 8077 | 15 67.4] 9.0 | 33.7 16 28.2 |\— 5 38.7 |-4.5 45.0 600 | 15 14.5 | 21.8 | 24.6 631 3 91.3 | 28.4 | 18.0 16 26.7 |— 5 48.9 |-2.1 39.9 September 12 8070 4 52.3 | 24.6 | 14.5 8077 | 15 54.7 | 12.3 | 26.7 16 28.4 |— 5 42.4 |—1.2 44.8 600 | 15 37.3 | 23.1 | 16.8 631 4 24.0 | 15.0 | 25.0 37 16 26.7 |— 5 45.8 |-1.0 | 37 10 39.9 The mean latitude is found to be 37° 10’ 46.53 + 0.02. The probable error of one observation is derived from all observations of pairs taken more than twice, and found = + 0’.29. ASTRONOMICAL CO-ORDINATES OF TRINIDAD. Longitude.... 6" 58™ 008.095 or 104° 30’ 01/.42 west from Greenwich. Longitude.... 1 49™ 478.975 or 27° 26’ 59.62 west from U.S. Naval Observatory, Washington, D. C. Latitude ...- 37° 10! 46.53 + 0.02 north. U. S. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN, ist Lirur. GEO. M. WHEELER, Corps or ENGINEERS, U.S. ARMY, IN CHARGE. RESULTS OF OBSERVATIONS MADE BY PROF. T. H. SAFFORD AND JOHN H. CLARK IN THE DETERMINATION OF THE ASTRONOMICAL CO-ORDINATES OF FORT UNION, NEW MEXICO. SEASON OF 1873 COMPUTATIONS BY Pror. T. H. SAFFORD anp JOHN H. CLARK. 313 FORT UNION, NEW MEXICO. GEOGRAPHICAL POSITION OF STATION. Longitude, . . 105° 00! 51.15 + 0.15 west from Greenwich. Latitude,. . . 385° 54! 24.86 + 0”.22 north. Barometric altitude of observatory above sea-level, 6744.1 feet. Fort Union is a military post and supply depot, situated near a branch of Mora Creek. East of it is Turkey Hill, and in the west is a range of mountains which rise between it and Santa Fé. An ordnance depot, in charge of a military storekeeper, lies about 14 miles west of the post, on - the opposite side of the adjacent stream. Some miles northwest is a mesa of picturesque shape, and in a more northerly direction and farther from the post there stands a mountain which is seemingly an extinct volcano. The neighboring tributary of the Mora issues from the mesa by a canon whose mouth is perhaps 34 miles from the post in a direction nearly west. It is manifestly an insignificant stream in ordinary circumstances, but sub- ject to heavy freshets. In latitude the position of this post nearly corresponds with Emory’s camp 40, near the crossing of Mora Creek, and in its neighborhood to the town of Mora and in other circumstances it agrees well with Emory’s description. The latitude of his camp was 35° 54’ 21’; the chronometric longitude was 6® 59™ 49° or 104° 57’ 15” west of Greenwich. The latter result places his station nearer to the present post than it would be after allowing for the error in the assumed longitude of Fort Leavenworth, and adding, as a correction, 10’ 35”, which would change Emory’s determina- tion to 105° 07’ 50”, and place his camp some miles up the cafion to the west. ; METEOROLOGICAL CONDITIONS. The temperature was very equable during the time of occupation. As the astronomer was accompanied by no trained assistant and had no meteor- ; 315 316 ASTRONOMY. ological instruments he could only possess himself of such data as could be extracted from the hospital records, which were obligingly put at his disposal by Captain Peter Moffat, assistant surgeon, U. S. A. In general, the climate is similar to that of Santa Fé, which station was occupied during the previous month, July. The annual rain-fall at the two places is about equal, and the wet season is of simultaneous occurrence, including the months of July and August. It was observed that the opera- tions at Fort Union, in August, were more interrupted by rainy weather than those at Santa Fé, in July. So far as noticed, the productions of the country are steals the same on both sides of the mountains. From Fort Union to Las Vegas the apparent fertility of the country and its opportunities for irrigation increase, as does, apparently, the observed yearly rain-fall. DESCRIPTION OF OBSERVATORY. The observatory was a condemned Army wall-tent, with suitable aper- tures in its sides. The sun-dial of the supply-depot was used as an observ- ing-pier. ‘The stone monument, with an inscription in blank, reached Fort Union the day before the departure of the observer, and was planted about eight feet due south of the sun-dial. The dial, though rather too high for convenience, was very firm and solid. Some inconvenience arose from shifts in azimuth produced by the working of the foot-screws in channels cut in the stone. In the minor details of the work, such as copying, care of implements, and the preparation of manuscript blanks, of which there were no printed forms in the astronomical outfit, assistance was rendered by Sergeant W. H. Andy of the Fifteenth Infantry, who showed faithfulness and zeal in the discharge of his duties. Lieutenant Eckles, then in command of the post, was kind enough to detail also an additional soldier for a night or two to relieve the sergeant. The lines of the Western Union Telegraph Company, operated by Mr. Theodore Ruthenbeck, were used in the transmission of signals. The instruments and instrumental values were the same as at Santa Fé, described in the following report on that station. CONNECTIONS—OBSERV ERS—COMPUTERS. 317 The length of circuit, from Fort Union to Salt Lake City, was about 1,000 miles. Repeaters were used at Denver, Cheyenne, and Corinne. CONNECTIONS.—OBSERVERS.—COMPUTERS. Connection was made with the station at Salt Lake City, John H. Clark, observer, on August 14, 16, 18 and 25. Latitude observations with the zenith telescope were taken upon the nights of August 24, 28, 29 and 30, and with the transit instrument in the prime vertical on August 11 and 12. The latter, however, are not included in the discussion. The observations at Fort Union were made and computed by Prof. T. H. Safford. 318 ASTRONOMY. Tabulation of stars used ‘for determination of time at Fort Union, New Mexico, and Salt Lake City, Utah. Ie GSGAnrn Qa ww LS ers wn ice =< I GX DHE C » PEs [a C— S i=) © RZe2ID Rx~ Dx ares pa ritten I mR Oo re FORT UNION, NEW MEXICO. SALT Name of star. August 14. August 16. Ophiuchi Draconis Herculis Hercnlis:+2= 222. ae sca ceeeee ee eel eee eee Serpentis Herculis Groombr. 966,S.P, 212-2. s-tece ces. [bee bail Herculis Ophinehitencaceeesesseshenesice oe: 2 lerculistssacpcsss semensateseoecem| bees = MPacOniswaccassceees sess ese so Sas Se ae Se HMerculis2 sess seas os secose ese ses|koes é IDTACONIS) = csan ese cee aoe eters ceenlosee | sees Hereulisiats, qaccss cscs coe eoceca see =e Herculis Draconiste.se= cceees cee che ses .eee seem jeaee 5 Draconis ease seccee ce seasaceceea| tose Ophiuchifss-s2s5 asses soso e seee ee caleae Ophiuchi Herculis SHSM AIT soy oncnos nooo oooo asso: ||ennolleacelle IPGL CDLIsSisaesetis cate eis aoe ees | Serer [eae (Urses MInoris’si. ae s = : (OMG soc6cs sobasd onemor acaae0 aase|jacsa|[eose AGING coopocbes Sanace socinee seaTe = - AQUI caccaccr eee cmencins stone =ci| eee Sees Draconispese == sa ss-siene coe eeeeee &s Aquilsa = Saco a cceareeeisoasacs eee lee | Seer Aguile anoiaeeeoooee sae e ese aS JAC IMIG Seo caciae Cosme ee coe oes noneSe seo es (Oh) MNO oS cosh asescisocesosaases sel |ioes Cepheiieeress-ecceoeee aaa acea|eee Capriconmimes-—-eeeasene- eee cee 2 : (Chai, Sse ascece Geacad Soca oase| aos pase Del phiniesaa se metesee a ettenemsteneeae sono|!sa- Coephei. .5s22.- saseetssceeccciees es < Z Groombr, 3741..---..- Mal phic. fae tee ee ek ll ele August 18, August 19. August 25. August 26. Bees z: BS ach a x Jo] x S [ioe | se August 27. x . sz [se fs Se OE <|/a2a|< > 60 aes x x See Boa Da ate a Meas re bos | ~~ ~ Z| 2 éc | op = |5 IAGUEN asodeas coed osceccosccssse||ssa6 Bees (Ciel asco od Gosden denser 2a6ss° cena) esos ere » CRON —ccmeng sosoosederaras eases : es Aaa nos. secede dssdesoopssTe J6|}son6 < (CW oocccceeesen socaneesssesasct||-aes Beer ere (OWS oeaeeeuesneoas Ssnsesae geesen||Ps oc SN e--- 48 10.05 |— 0.17 |\— 0.37 |— 0.78 48 08.73 |17 09 50. 37 41.64 B72) Bercolis).------ 54 15.77 \— 0.05 |— 0.42 |— 0.88 54 14.47 15 56.12 41.65 HS) A eHerenlis;--2---- 7 03 57.66 |\— 0.15 |— 0.41 |— 0.78 | 7 03 56.32 25 37.81 41.49 E. | z Hercnlisy-----> 14 14.16 |-+ 0.20 |— 0.56 |— 1.02 14 12.78 35 54,23 41.45 E. | Draconis..-.-.--. 22 33.73 | 1.55 |— 1.08 |— 2.30 22 31.90 44 13.32 41. 42 W.|o ‘Herculis’.-.... 40 54.06 |+ 0.13 |+ 0.41 |+ 0.80 40 55.40 |18 02 36.98 41.58 W.| 6 Urs Minoris- -- 51 36.73 |—11.63 |+ 3.34 |+11.90 51 40. 34 13 20.93 40.59 - W.| 109 Herculis ..----. 56 36.05 |-+ 0.23 |+ 0.30 |+ 0.76 56 37.34 18 18.96 41. 62 W.|% #Draconis....--. 8 01 39.46 |— 1.79 |+ 0.70 |+ 2.36 | 8 01 40.73 23 22.34 41.61 W.| 110 Herculis ..----. 18 31.03 |+ 0.25 |+ 0.18 |4+ 0.77 18 32.23 40 13.74 41.51 Walla) saliyneeree eee ae 8 23 42.67 |+ 0.05 + 0.17 |+ 0.84 | 8 23 43.73 |18 45 25.24 |-410 21 41.51 Wei, (Cepher=------- 10 20 26.57 |— 0.33 |+ 0.72 |+ 1.56 |10 20 28.52 )20 42 44.71 |4+10 2216.19 Vol (CAFS ste esece: 30 11.38 |— 0.04 |+ 0.46 |+ 0.99 30 12.79 52 28. 62 15. 83 Wiel is (yal S556ss58: 38 03.73 |\— 0.07 |+ 0.44 |+ 1.03 38 05.13 /21 00 21.01 15, 88 W./| a Equulei--.-.---. 47 13.93 |+ 0.19 |4+ 0.25 |+ 0.75 47 15.12 09 30.94 15, 82 iH. |B) iGephers-ce- === 11 04 49.83 eS 0.60 |-+ 0.96 |— 2.20 |11 04 47.99 27 03.84 15. 85 106 || ie TRAPS seoscsaone 16 40.35 (+ 0.08 |+ 0.51 |— 0.83 16 40.11 38 55.99 15. 88 iB. 160eberasin.-os-- 25 03.76 |+ 0.07 |4+ 0.56 — 0.83 25 03.56 47 19,41 15, 5 E.| a Aquarii-..--... 11 37 02.19 |+ 0.22 |+ 0.38 |— 0.75 |11 37 02.04 |21 59 18.18 |41022 16.14 NORMAL EQUATIONS. First series. Before reversal— 0 = -+ 08.477 + 3.860 d¢-+ 5.466 de — 0.531 da ATo=- 105 21™ 415.68 0 = + 05.732 -+ 5.466 dt + 10.098 de — 2.950 da ©=— 08.71 0 = — 08.137 — 0.531 dt — 2.950 de + 2.142 da a =— 08.84 After reversal— 0—-+. 08,519 + 4,050 dt — 5.173 de + 0.039 da ATo—=-+ 102 21™ 418.68 0 = — 08.575 — 5.173 dt-+ 8.606 de + 1.684 da Co =— 08.71 0 = -+ 08.103 + 0.039 dt + 1.684 de + 1.760 da a=+ 08,95 Eliminating both values of da— 0 = + 08.960 + 7.777 dt — 0.475 de ot = — 08.123 0 = — 08.130 — 0.475 dt + 13.031 de dc= + 02,006 Weight of AT =7.76 Before reversal da = -+ 08.042 After reversal da=— 08.061 Weight of c—13.01 0 = — 05.801 + 6.458 dt — 0.160 de- 0.213 da 0 = + 08.539 — 0.160 dt + 12.714 de + 0.045 da 0 = — 05.303 + 0.213 dt-+ 0.045 de + 2.136 da Weight of AT=6.44 Second series. Weight of e=12.71 Weight of a=2.13 08.71 08.235 ot = -+ 08.119 ATo=-+ 10" 22™ 158.80 de = — 08 041 o—— da = -+ 08.131 a=-+ TIME DETERMINATIONS. 329 Observations and reductions for time taken at sending station—Continued. FORT UNION, NEW MEXICO, AUGUST 27, 1873. | Clamp. tcl oll] bbb bbe 22sdneee Name of star. Mts Aa. Bb. ‘Ce: Ae AR. AT. Tiwi Se 8. 8. 8. hm. 8. ep ibe ee 8 hem. 8. e Ursw Minoris-..| 6 33 29.06 |— 7.26 |+ 1.24 |+ 4.50 | 6 33 27.54 |16 59 03.62 |+ 9 2536.08 0) Herenlis:----=-. 44 13.53 |-+ 0.28 |+ 0.26 |-+ 0.67 44 14,74 |17 09 50, 35 35. GL @ SOphinehi=------ 7 03 26.98 |-+ 0.55 |+ 0.20 |+ 0.62 | 7 03 28.35 29 03.97 35, 62 GmeELerenuigyeee =e. 10 17.88 |— 0.34 |+ 0.30 |+ 0.88 10 18.72 35 54.21 35, 49 eeeELOLCUIS| sea cs 15 54.20 |+ 0.22 |+ 0.23 |-+ 0.69 15 55. 34 41 30. 86 | 35. 52 6 Draconis -<=-<-. 25 45.57 |— 0.89 |+ 0.34 |4+ 1.11 25 46.13 51 21.49 35. 36 A Herculis -.----. 41 34.21 |+ 0.07 |+ 0.04 |— 0.71 41 33.61 |18 07 09.17 35. 56 Oo Urs Minoris. -. 48 03.85 |— 9.61 |+ 0.68 |—10.28 47 44.64 13 20.50 35. 86 109 Herculis -.----. 52 43.74 |+ 0.19 |+ 0.09 |— 0.65 52 43, 37 18 18.94 35. 57 6 ~ Draconis -----.- 57 03.80 |— 1.33 |+ 0.27 |— 1.¢0 57 00. 84 22 36. 46 35. 62 110 Herculis ....-. | 8 14 38.37 |-+-.0.21 |+ 0.17 |— 0.65 | 8 14 38.10 40 13.73 35. 63 Bo a luyreele esc eae 8 19 50.34 |+ 0.04 |+ 0.20 |— 0.73 | 8 19 49.85 |18 45 25.24 |4 925 35.39 « (Cephelia-ee- ---- 9 47 10.07 |— 2.45 |+- 0.78 |— 3.34 | 9 47 05.06 |20 13 10.52 |+10 26 05. 46 e Delphint------- 10 01 06.18 |-++ 0.35 |+ 0.19 |— 0.75 |10 OL 05.97 27 11.01 05. 04 @ (Cygnieeee= eee 11 04.47 |— 0.18 |+ 0.24 |— 1.03 11 03.50 37 08.37 04, 87 py (Cypnicssaeecees 26 24.65 |— 0.09 |+ 0.15 |— 0,97 26 23.74 52 28.61 04. 87 G (Cypmeesseneees 41 27.81 |+ 0.10 |+- 0.40 |/+ 0.84 41 29.15 |21 07 34.26 05. 11 1 Bepasieee eee 50 08.70 |+ 0.25 |+ 0.31 |4+ 0.78 50 10. 04 16 15.16 05. 12 B Cephei... ----.|11 00 57.58 |— 1.33 |+ 0.62 |4+ 2.14 {11 00 59.01 27 03. 82 04.81 «. Pepasl’.2:seeece 11 12 49.73 |+. 0.17 |+ 0.22 |+ 0.81 {11 12 50.93 [21 38 55.99 |+-10 26 05. 06 NORMAL EQUATIONS. : First serics. Before reversal— 0 = -++ 03,986 -+ 4.384 dt — 5.797 de — 0.118 da 0 = — 28.301 — 5.797 dt + 9.687 de + 2.046 da 0 = — 18.034 — 0.118 dt + 2.046 de 4 1.838 da After reversal— 0 = — 05.086 + 3.938 dt ++ 5.013 de + 0.125 da 0 = — 08.571 + 5.013 dt + 8.111 de — 1.454 da 0 =-} 08.397 ++ 0.125 dt — 1.454 de 4- 1.528 da Eliminating both values of da— O= + 08.802 + 8.304 dt — 0.534 de dt = — 08,091 ATo= 105 25™ 355.63 0 = — 18.343 — 0.534 df + 14.186 de dc = + 08.092 o=— 08.70 da’ = + 08.454 do = + 03.90 da’ =— 08.165 a= + 08.90 Weight of AT =8.28 Second series. Weight of c=14.10 0 =— 05.340 + 5.856 d¢-+ 0.023de—0.349da | dt=- 08.053 ATo= 10826™ 0 =-t 05.367 + 0.023 d¢ + 13.853 de — 1.054 da dc = — 08.033 o—— 0 = -+ 08,228 — 0.349 dé — 1.054 de + 2.826 da da = — 05.087 a =-+ Weight of AT=5.81 Weight of c=13.46 48.96 08.70 08.90 Weight of a=2.72 326 ASTRONOMY. Observations and reductions for time taken at receiving station. SALT LAKE CITY, UTAH, AUGUST 14, 1873. = Name of star. | rT Aa. Bb. Ce. ae AR. Te 3 h. m; +8. oH 8. 2h hm 38. lie ids 8 hie Me) ees IDG ue Oya ace. 8 44 35.67 |— 0.86 |-+ 0.06 |+ 0.08 | 8 44 34.95 |16 51 41.03 |+-8 07 06.08 B: | @ Hereulis’---5---- 49 50.51 |— 0,24 |+ 0.12 |4 0.09 49 50.48 56 56. 48 06. 00 Bata) eerceulisyeesemcr= 9 01 47.49 |— 0.75 |+ 0.09 |+ 0.08 | 9 01 46.91 |17 08 53.11 06. 20 E. |» Serpentis....---- 06 38.05 |— 1.34 |+ 0.06 |+ 0.08 06 36.85 13 43, 02 06. 17 k. Groom. 966, 8. P-. 15 45.94 |— 5.66 |— 0.18 |— 0.28 15 39.82 | 5 22 45.93 06.11 Eee. Ophiuchy==22=-—5 21 58.62 |— 0.73 |-+ 0.10 |+ 0.08 21 58.07 /17 29 04,15 06. 18 Wo Draconis,=------2 30 35.49 |4+ 2.12 |+ 0.29 |— 0.21 30 37.69 37 43.83 06. 14 Walt slercaligis-~----- 34 25.45 |— 0.41 |4+ 0.12 |— 0.08 34 25.08 41 31.10 06, 02 W. | 7. Draconis=--2---2 46 34.77 |+ 0.49 |+ 0.17 |— 0.12 46 35.31 53 41. 43 06. 12 W. | 72 Ophiuchi.--:--. -.. 54 16.55 |— 0.86 |+ 0.09 |— 0.08 54 15.70 |18 01 21.65 05. 95 W.| @ Sagittarii ..----. 59 07.84 |— 1.55 |+ 0.05 |— 0.08 59 06. 26 06 12.41 06. 15 W.| 7 Serpentis...... --|LO 07 41.47 |— 1.12 |+ 0.08 |— 0.08 |10 07 40.35 118 14 46.33 |+8 07 05.98 Mean ‘ati17}:5 local siderealtimescss22+ = 22m oe eee eee ee nee ee eee eee eee Oat aGosUS NORMAL EQUATIONS. + 12.00 dt-+ 6.70a— 7.15e—— 10.54 jt = + 05,08 + 6.70 d&+16.92a— 9.33 c= — 27.76 a=— 15,630 — 7.156f— 9.383 a+ 35.18 ¢= + 17.31 e=-+ 03075 SALT LAKE CITY, UTAH, AUGUST 15, 1873. I Name of star. AM, Aa. Bb. Ce. Te AR. AT 5 Reames 3. 8. 8. [50> = EE ie its EP hem. 8. E. | a! Herculis ...-.... 9 01 47.33 |— 0.82 |+ 0.03 |+ 0.14 | 9 01 46.68 |17 08 53.09 |+8 07 06. 41 E. | » Serpentis.----.-.. 06 37.95 |— 1.46 |+ 0,03 + 0.14 06 36. 66 13 43.01 06. 35 E. Groom. 966, 8. P-. 15 46.35 |— 6.18 |— 0.13 |— 0.52 15 39.52 22 46.03 06.51 aia) Ophinchissso = 21 58.49 |— 0.80 |+ 0.04 |+ 0.14 21 57.87 29 04.14 06. 27 BR. | o Draconis ---.-.-- 30 34.62 |+ 2.51 |— 0.10 |4+ 0.48 30 37.21 37 43.77 06. 56 . | 2 Herculis ..-..... 34 24.96 |— 0.45 |— 0.09 + 0,15 34 24.57 41 31.08 06.51 Wella Draconisi----- 5 46 34.73 |+ 0.53 0.00 |\— 0.22 46 35. 04 53 41.41 06. 37 W.| 72 Ophiuchi..----.-- 54 16.34 |— 0.94 |— 0.01 — 0.14 54 15.25 |18 01 21.64 06. 39 W.| vw! Sagittarii ....... 59 07.86 |— 1.69 |— 0.02 — 0.15 59 06. 00 06 12.40 06. 40 W.| 7 Serpentis.......-. 10 07 41.38 |— 1.23 |— 0.0L |— 0.14 |10 07 40.00 14 46.33 06. 33 WwW Bradl:2313) <= 22. 14 55.02 |— 1.51 |+ 0.02 |\— 0.14 14 53.39 21 59 80 06. 41 We) || eA quilseka eee = 10 21 15.10 |— 1.35 |4+ 0.03 |— 0,14 |10 21 13.64 [18 28 19.91 |48 07 06, 27 Mean ‘at :18)/0localsidereall time)s-2- <2... - 22. oscaiee on eeee nae eee oe eee 4-8 07 06, 40 NORMAL EQUATIONS. + 12.00 dt+ 7.63a— 3.60c=— 9.31 dt = + 03.40 + 7.63 dt + 17.92 a— 18.34 c =— 31.40 a=— 13.780 — 3.60 dt — 18.34 a + 34.80 e—=— 36.10 c= + 08.136 TIME DETERMINATIONS. 327 Observations and reductions for time taken at receiving station—Continued. SALT LAKE CITY, UTAH, AUGUST 18, 1873. a g Name of star. Gt Aa. Bb. Ce. We AR. AT. a Re Ms Ss 8. 8. 8. hum. 8 |A. m.- 8. hm 8. E. |v Serpentis ...---.| 9 06 38.42 |— 1.36 |— 0.01 |+ 0.15 | 9 06 37.20 |17 13 42.97 |+8 07 05.77 Bea) Ophiucht=-- =--- 21 58.88 |— 0.80 |— 0.03 |4+ 0.15 21 58. 20 29 04.10 05. 90 Hy | om Draconis... ---- 30 35.50 |-+ 2.16 |— 0.22 |+ 0.39 30 37.83 37 43.61 05.78 By/|\ 2) Hereulis) 3-22. 34 25.33 |— 0.42 |— 0.13 |4+ 0.16 34 24.94 41 31.03 06. 09 W.| y Draconis.-...-..| 46 35.00 |+ 0.50 |+ 0.12 |— 0,23 46 35.39 53 41.33 05. 94 W.)|/)72'Ophiuchi--.--2-- 54 16.79 |— 0.88 |+ 0.05 |— 0.14 54 15. 82 |18 01 21.61 05.7 W.| | Sagittarii ....... 59 08,23 |— 1.58 |+ 0.02 |— 0.15 59 06. 52 06 12. 37 05. 85 W.| 7 Serpentis ..---.. 10 07 41.77 — 1.15 |+ 0.04 |— 0.14 |10 07 40,52 14 46. 30 05. 78 W. Brad]. 2313 .....-| 14 55.51 |— 1.41 |+ 0.05 |— 0.15 14 54.00 21 59.77 05. 77 Wale Aquille: oos2s-- =: 10 21 15.34 |— 1.26 |+ 0.07 |— 0.14 |10 21 14.01 |18 28 19.89 |+8 07 05.88 Mennl ati: 7 2:5 localiistderoalgtimessse toes eis aaa aaa femiaie ciel qo abe ermcterenin +8 07 05, 85 NORMAL EQUATIONS. + 10.00 dt+3.73a— 0.78¢=— dt =— 08.15 + 3.75 dt + 5.70 a— Seamer es a = — 15.660 — 0.78 6l— 5.43 a + 18.92 c= -+ 11.83 c=-+ 05.142 SALT LAKE CITY, UTAH, AUGUST 18, 1873. a I Name of star. dt Aa. Bb. Ce. ube AR. AT. 5 ReMi a Ss Be 8. 8 ial Meee 8: Rams |S: hem. 8. W.| 6 Aquile.-.-.--..-.. 11 42 01.93 |— 1.03 |+ 0.06 |— 0.15 |11 42 00,81 |19 49 06.76 '+8 07 05.95 W.| 6 Aquilw....-----.. 57 42,81 |— 1.21 |4+ 0.06 |— 0,15 57 41.51 |20 04 47.44 05, 93 W..| a® Capricorni .----- 12 03 58.60 |— 1.49 |+ 0.06 |— 0.15 |12 03 57.02 10 02.98 05. 96 W.| x Capricorni .-..- 13 01.64 |— 1.64 |4+ 0.05 |— 0.15 13 59.90 20 05.71 | 05. 8L W.} © Delphini--.-..-... 20 05.97 |— 0.92 |4+ 0.09 |— 0.15 20 04.99 27 11.03 | 06. 04 1 |G (Oi iailicconcoeeeas 30 01.90 |+ 0.15 |+ 0.24 |+ 0.21 30 02.50 37 08. 45 05. 95 Be) 2 Aquarii <.-.- ==. - 33 45.91 |— 1.40 |+ 0.09 |+ 0.15 38 44.75 45 50.70 05. 95 Bia |oe (Oyomie emcees 12 45 22.35 0.00 |+ 0.16 |+ 0.20 |12 45 22.71 |20 52 23.62 +8 07 05.91 Mean) at 20% local sidereall times s- note n = ae ine ae nm ono lenetnne Samet nm eee a +8 07 05.94 NORMAL EQUATIONS. -+ 8.00 d¢ + 4.18 a — 1.387 e=— 8.23 ot = — 08.06 + 4.18 dt + 3.16 a — 2.90 c= — 6.42 a =— 18,800 — 1.37 dt — 2.90 a + 9.97 c= + 6.82 c= -+ 08,152 The observations for time taken at Salt Lake City August 16, 19, 25 and 26 are printed in the report on Labran, Colorado. 328 ASTRONOMY. The following tables show the corrections and rates of the chronometers used at Fort Union and Salt Lake City: CHRONOMETER AT FORT UNION.—Fropsnam, No. 1974. > Date. Local sidereal Correction of chro- Adopted hourly time. nometer. rate. 1873. h. hem. 8 8. Ss Aug. 14 21.5 9 35 30. 200+0. 041 +9. 725 Aug. 16 20FD 43 27, 489-0. 033 9. 766 Aug. 18 20.0 50 51.570=E0. 033 9.775 Aug. 19 19.0 54 36. 3522£0. 031 9.792 Aug. 25 22.0 10 18 27. 800-0. 034 9.750 Aug. 26 19. 75 21 58.7380. 028 9.752 Aug. 27 19. 50 10 25 50. 276-E0. 029 9.772 CHRONOMETER AT SALT LAKE CITY.—NEcus, No. 1511. Dae Local sidereal | Correction of chro- | Adopted hourly time. nometer. rate. 1873. h. h. m. 8. 8. Aug. 14 17.5 +8 07 06.08 — 0.013 Aug. 15 18.9 OG540 5) paeeee eee Aug. 16 19.0 06. 05 0. 00 Aug. 18 18.8 05. 90 0. 00 Aug. 19 20.0 06. 04 + 0.006 Aug. 25 19.5 04. 37 + 0.010 Aug. 26 19.5 +8 07 04.16 + 0,009 Notr.—The probable error of a star at the equator was found to be 05.105 by the combination of all the observations. Signals sent from— Recorded at— August 14, 1873: Fort Union .-.. ; Salt Lake City- August 16, 1873: Salt Lake City. ~_—saon~ Fort Union --... August 18, 1873: Salt Lake City. i Fort Union ..-. Fort Union -.-. Salt Lake City. Fort Union ---- Salt Lake City. Fort Union -. -- Salt Lake City. Fort Union ..-. Salt Lake City- Fort Union .... Fort Union ..-. Salt Lake City- Salt Lake City. Final results of longitude. Mean oreies Time-correc- Corrected naeermaal tions. time. hm. 8. he. me 8: he > 8: 10 02 50.00 |+ 9 35 12.05 |19 33 02.05 11 03 24.66 |+ 8 07 06.10 |19 10 30.76 10 13 57.53 |-+ 9 35 13.86 |19 49 11.39 11 14 33.76 |+ 8 07 06.10 |19 21 39.85 9 39 41.54 |-+ 9 42 56.99 |19 22 38.53 10 48 00.77 |-+ 8 07 06.05 |18 55 06, 82 9 54 38.18 |+ 9 42 59.43 |19 37 37.61 11 03 00.32 + 8 07 06.05 |19 10 06. 37 10 01 15.35 |4- 9 50 50,28 |19 52 05. 63 11 17 28,11 |+ 8 07 05.90 |19 24 34.01 10 14 30.00 |+ 9 50 52.44 |20 05 22.44 11 30 45.24 |-++ 8 07 05.90 |19 37 51.14 Difference of longi- tude. Double- wave time. | m. 8. ao 27 31.29 31.53 0.24 31.71 31.24 |0.47 31. 62 27 31.30 Means. m. 8. 27 31.410 31.475 27 31, 460 TABULATION OF STARS. 329 Final results of longitude—Continued. oe Mean of sig- 2 ake Difference|7 .2 Signals sent from—| Recorded at— |nalssent and Aipae Saeree woretid of longi- |Z | Means. received. use 4 tude. |5¢ J Ag August 25, 1873: he Mma 8: leatits &b \\l0e Gite ee Mee 8 Mm. 8 3 mo (1 Fort Union .. ..|10 20 18.39 |+10 18 14.57 |20 38 32.96 Se ; Salt Lake City.|12 03 56.96 |-4 8 07 04.36 20 11 01.32 | 27 31.64 Wart Union § | Fort Union ..../10 25 00.00 |+10 18 15.30 20 43 15.30 : “"-" | Salt Lake City.)12 08 39.68 |+ 8 07 04.36 |20 15 44.04 | 27 31.26 |0.38) 27 31.450 HoriUnronteastorsaltualketCitvese te. aesirese=s sa ceecis aaeeet sels aoe eteee nee 0b 27m 318.45 + 08.009 Adopted longitude of Salt Lake City <2-2.%---<~ ---22- -2es-5 cos-os se sinee ences 7) 27m 348.86 Fort Union west of Greenwich.........-... =5 : 038.41, or 105° 00’ 51/,15 Fort Union west of Washington 518.29, or 27° 57/ 49.35 Mean places of stars for 1873.0 used for determination of latitude of Fort Union, New Mexico. No. of pair. ee SHU SEC Declination. || No. of pair. ae Hiebuasvens Declination. hm. 8. oa us hom. 8. COR Hi! 1 6006 | 17 37 42] 68 48 58.70 |] a5 7105 | 202840] 56 20 56.96 ja a 6020 41 31 | 2 45 24.30 || ““"---7"- 7149 33.44] 15 27 55.44 9 6091 | 17 53 39| 51 30 16.38 |] 9 7176 | 2037 36] 60 02 47.64 oo eae 6159 | 18 03 24] 20 01 37.5 vee} 7223 43.35 | 12 04 18.22 3 ; (Gr. 2494)| 17 55 15 45 29 04.32 || o4 ; 7188 | 203923] 24 49 02.94 eee 6151] 18 02 42| 26 04 55.72 rT sae 7198 40 25] 46 50 12.56 ae 3] ase] 14.58 | 20:36 aoi28 || 2------ 1% poep) 7948 45 | 45 Sa boa . 23% ) 29 ¢ Stele Wee ae 25% 3 54 26. 5 6237 |. 18 16 04] 29 47 59.32 || o¢ 7275 | 205236] 221.50 10.30 Poet (Gr. 2563) 20 15 | 42 23 58.10 f--- 7204 54 26 ae pe 09. 2 Este ; az (Be oa | oe oie | tee } (Gr. 3494) ae ip sa | p40 on o2 7 6438 | 18 46 51 2 16 24.66 |} 93 7324 | 21 04 10 9 af 15. a Seto 6470 50 05 331045201 |hsr ass aa 7416 15 33] 62 02 51.86 8 6500 | 18 55 23) 58 03 02.£0 |} o9 7413 | 211613] 19 15 43.66 ey _ 6528 59 35 | 13 40 34.58 |] ““*-7-> 7468 22 34] 52 20 50.98 9 6566 | 19 05 19] 50 09 34.52 |} 45 7444] 211856| 25 37 44.78 soprerne 6574 07 10 | 21 20 31.60 veces} 7455 20 40] 46 09 53.74 10 6602} 191221 | 22 47 54.24 || 4 7493 | 2127014 70 00 11.44 ec hs 6626 15 15] 49 20 04.46 |] °rr7-7- 7527 33 07 1 40 25.38 Mcores 2. pts 19 Pe a = Ae io S ot ee 7542 | 213431] 61 30 34.18 F 5.7 7553 36 21| 10 14 46.14 12 6690 | 19 25 36| 27 41 40. 2 33 1567 21 3830] 16 46 07 36 Sass 731 32 42) 44 24 56.3 rae rte 763 47 44| 55 12 60.9% (*) 19 32 27 | 29 19 42.56 7664 | 215454] 12 30 44.60 tea ; TAS 35 18| 42 31 33.70 || 94------- ; 7698 | 22 00 04] 59 15 04.56 14 762 | 19 38 44| 26 49 58.24 || g- 7742 | 2205 43| 15 24 56. 4€ see ioos ; 6779 41 00| 44 49 18.34 |] °?------ } 7754 07 14] 56 12 30.64 ~ . 4 H « ‘ € 1 ee 6799 19 43 44) 47 35 40.54 |} 55 707 | 22.17 33] 20 12 25.96 335 49 08 | 23 59 16.08 7815 18 34] 51 35 35.94 16 6824 | 19 47 26 | 52 39 58.84 || 5 § 7850 | 222500] 42 28 22,38 poe tags 6858 53 07 | 19 08 54.82 |] °4------ >) 7923 37 03 | 29 33 27.72 a (Gr. 2977)| 19 51 17 a7 12 18. 48 ag 7961 22 S 32 = iB a aA ees 6883 56 38 | 24 35 01.68 ia eb 7975 46 47 10 04. 62 18 6895 | 19 57 46) 49 45 07.30 |} oo 8058} 239151] 45 42 04.78 eg 6927 |/-. 20:03 11) SE 47 09F 1A. Wo" oro 8079 05 39 | 26 09 42.44 eo §] OS) MES) See lot] ay) ee) Bees 90 6941 | 20 05 28) 20 45 28.82 }] 4, ; 8153 | 281653] 59 26 14.62 Pos Soar 6959 09 00 | 51 04 56.40 Sara ak 8182 | 23 22 44] 12 03 35.63 a € 5 5 <) 56 ¢ 5 pire uh 4 6943 | 20 06 29) 26 25 52.82] oa. 6231 | 18 14.56 | 21 51 33.56 (Gr. 3110) 1153} 45 11 30.36 6252 17 56| 49 39 50.26 * A star following B, A. C. 6714. 330 ASTRONOMY. Observations and computations for latitude. FORT UNION, NEW MEXICO. Level. Corrections. Number | Microm. ' Ea a) ——S : Date. of star. | readings. 4 Remarks. declination.) yriorom. Eatiinds. N. Ss. Real te Level. 1873. ene: d. d. Oa @ Us ArH? Us oye u August 24 | Gr. 2494 | 34 30.7 | 36.0 | 28.0 6151 | 26 72.2 | 41.0 | 43.5 6231 | 29 92.0] 35.0 | 49.5 6251 | 26 93.0 | 49.5 | 35.0 6438 | 23 57.5 | 29.0 | 57.0 6470 | 24 27.0) 52.0 | 35.0 35 54 53.58 |— 0 22,37 |— 3.00 | 35 54 28.21 6800 | 21 43.0 | 42.7 | 43.7 ! 6523 | 26 08.3 | 32.5 | 54.0 35 51 57.36 |+ 2 29.76 |— 6.40 20.72 6690 | 19 70.0 | 56.0 | 30.0 6731 | 36 64.2 | 40.0 | 47.0 36 03 28.01 |— 9 05.28 |4+ 5.18 27.91 6762 | 26 46.0 | 49.0 | 37.5 6779 | 17 93.0 | 41.5 | 45.0 35 49 48,04 |+ 4 34.53 |4+ 2.18 24.75 6824 | 25 79.0 | 35.5 | 51.5 6858 | 20 60.3 | 35.0 | 52.0 54 36,42 |— 0 06.02 — &.99 21.41 7105 | 23 37.2 | 54.0] 6.0 7149 | 22 66.7 | 27.0 | 33.0 35 54 35.71 |— 0 22.69 |4+11.44 24.46 7176 | 28 27.0 | 30.5 | 29.5 | 7223 | 1117.7 | 22.0 | 38.0 36 03 42.30 |— 9 10.14 |— 1.36 30. 80 7275 | 15 43.6 | 50.0) 9.5 7294 | 15 81.1} 41.0 | 18.0 35 54 19.40 |— 0 12.07 4-17.30 24.63 7324 | 23 54.2 | 23.5 | 36.0 741G | 14 94.4 | 44.0 | 16.0 50 12.81 |+ 4 04.54 |+ 4.22 SAG) 7444 20 80.2 | 32.5 | 27.0 7455 | 18 90.4 | 24.0 | 35.0 53 59.16 |-+ 0 28.90 |— 1.50 26. 56 7493 | 10 40.5 | 36.7 | 22.5 7527 | 17 61.4 | 32.0 | 28.0 50 27.18 |+ 3 52.02 + 4.96 24.16 August 28 6438 | 17 40.0 | 35.0 | 38.7 6470 | 18 35.4 | 39.0 | 35.0 54 54.27 |— 0 30.71 |+ 0.08 23. 64 €500 | 20 39.5 | 48.0 | 26.0 6528 | 24 84.6 | 33.0 | 41.0 51 57.95 |-+ 2 23.25 |4+ 3.82 25, 02 6673 30 52.9 | 52.5 | 23.0 GE97 12 09.5 | 24.0 | 52.0 44 33.30 4+ 9 53.30 + 1.77 28, 37 6762 | 33 08.9 | 32.0 |} 45.0 6779 | 2173.7 | 58.0 | 18.5 49 48.85 |+ 4 28.81 + 7.22 24. 89 6799 14 &.5 | 19.0 | 57.0 6835 | 27 75.5 | 35.0 | 41.0 47 38.86 |+ 6 55.19 |—11.99 22.05 6895 | 14 24.2 | 24.0 | 53.0 6927 28 62.5 | 35.0 | 42.3 35 46 18.78 I+ 8 15.10 '— 9.8) 13551 23.99 LATITUDE DETERMINATIONS. 331 Observations and computations—Continued. FORT UNION, NEW MEXICO. Level. Corrections. Number | Microm. Half-sum of = Date. of star. | readings. Remarks. declination. Micron Latitude. N. Ss. aaleven Level. 1873. 7 d. d. d. fe} i “ul ; / “a “a oO ‘ “ August 25 6943 | 26 70.6 | 36.0 | 41.0 Gr. 3110 16 45.5 | 29.2 | 48.8 35 48 52.33 |+ 5 29.93 |— 6.70 | 35 54 15.56 7105 | 22 74.0 | 52.3 | 26.7 7149 |. 22 23.5 | 35.0 | 45.0 54 36.60 |— 0 16.25 |4+ 4.25 24. 60 7188 | 23 57.2 | 41.0 | 39.0 7198 15 97.4 | 38.0 | 42.0 49 48.53 |+ 4 36.73 |-- 0.54 24.72 P.XX, 358 | 25 04.0 | 53.0 | 27.0 7253 | 28 12.6 | 31.6 | 48.2 50 37.02 |4+ 3 42.53 |4+ 2.29 21.84 7275 | 22 38.4 | 49.5 | 30.5 7294 | 22 35.6 | 37.0 | 42.8 54 20.36 |+ 0 00.90 |+ 3.60 24. 86 7324 23 51.7 | 39.3 | 20.7 7416 | 15 68.7 | 44.0 | 37.0 50 13.74 |+ 4 12.01 |+ 1.53 27. 28 7444 20 43.7 | 59.0 | 21.5 7455 | 20 00.2 | 45.5 | 35.0 54 00.18 |+ 0 14.00 |+13.08 27. 26 7542 18 34.5 | 45.2 | 35.5 7553 |. 21 03.4 | 50.3 | 30.7 52 49.15 |+ 1 26.54 |+ 7.98 23. 67 7664 | 23 24.5 | 49.0 | 33.0 7698 | 20 81.6 | 34.0 | 48.5 53 04,84 |4+ 1 18.17 |4 0.41 23. 42 August 29 6006 | — &6.7 | 32.0 | 36.0 6020 | 27 23.3 | 46.0 | 23.0 6091 | 14 39.7 | 19.0 | 51.0 6059 | 30 27.2 | 27.5 | 43.0 46 05.98 |+ 8 30,93 |—12. 94 23. 97 6203 | 19 25.0 | 39.0 | 32.0 6232 | 23 50.5 | 35.0 | 36.0 52 03,16 |4+ 2 16.95 |4 1.64 21.75 6302 | 14 73.2 | 37.0 | 35.0 6307 | 27 47.2 | 23.3 | 49.0 47 41.47 |+ 6 50,04 6. 46 25. 05 6438 | 22 10.0 | 41.0 | 32.0 6470 | 22 96.7 | 29.0 | 24.0 54 54.44 |— 0 27.90 1.64 24.90 6500 | 20 87.9 | 41.0 | 32.0 6528 | 24 75.5 | 35.5 | 37.5 * 51 58.10 |+ 2 20.85 |4+ 1.91 20. 86 6566 62.5 | 45.0 | 23.0 6574 | 29 77.5 | 29.5 | 43.5 _ (85 45 13.20 |-+ G.11.93 |+ 0.82 26. 00 6602 | 11 40.0 | 35.0 | 33.0 6626 | 29 49.4 | 30.0 | 43.0 36 04 09.68 |\— 9 42.35 4,36 22.96 6678 | 30 39.0 | 23.5 | 50.0 6697 | 11 76.7 | 39,0 | 35.0 35 44 33.48 |+ 9 59.38 |— 6.13 26.73 6714 | 16 40.7 | 41.0 | 33.0 6745 | 19 19.6 | 40.0 | 34.0 35 55 48.76 I— 1 29.77 I+ 3.82 135 54 22.81 332 ASTRONOMY. Observations and computations—Continued. FORT UNION, NEW MEXICO. Level. Corrections. Number | Microm. Half-sum of 3 Date: of star. | readings. Pa declination. Micrarn Latitude. T a 7 N. 8. andirote Level. 1873. t. fhe d. d. or “ 1 “ “ ior “ August 29 6762 | 26 04.5 | 15.0 | 59.0 6779 | 17 05.6 | 31.5 | 42.0 35 49 49,07 |+ 4 49.31 |—14. 8 | 35 54 23.53 6799 | 21 17.2 | 38.0 | 35.3 6835 | 28 99.0 | 28.0 | 46.0 47 39.07 |+ 6 52.55 |— 4.17 27.45 Gr. 2977 | 20 42.3 | 39.0 | 35.0 : 6883 | 21 57.8 | 46.0 | 29.0 53 50.94 |+ 0 37.17 |+ 5.72 33. 83 6941 | 21 25.7 | 44.0 | 31.0 6959 | 23 13.5 | 40.0 | 35.0 55 23.32 |— 1 00.44 |4+ 4.90 27.78 7105 | 21 59.8 | 44.0 | 32.0 7149 | 21 42.2 | 22.0 | 54.0 54 36,82 |— 0 05.66 |— 5.45 25.71 7188 | 26 13.5 | 44.2 | 31.6 7198 | 16 58.5 | 40.5 | 35.2 49 45.71 |-+ 4 35.18 |— 0.57 23.32 P.XX,358 | 20 38.8] 31.0 | 45.0 7253 | 13 12.5 | 30.0 | 46.0 50 37.25 |+ 3 53.76 |— 8.18 22. 83 7275 | 20 75.1 | 34.0 | 42.0 7294 | 20 52.0 | 33.2 | 42.2 54 20.60 |-+ 0 07.44 |— 4.63 23. 41 7368 | 18 81.4 | 32.0 | 44.0 Jeanne: 21 58,5 | 24.0 | 52.0 55 57.90 |— 1 21.04 |—10.90 25. 96 7418 | 28 81.4 | 32.0 | 44.0 7468 | 17 58.5 | 40.0 | 35.0 48 28, 22 | 6 01.41 |— 1.91 27.72 7493 | 17 65.5 | 40.0 | 35.2 7 7527 | 25 12.6 | 47.5 | 28.0 50 28.38 |-+ 4 01.10 |+ 6.62 “36. 10 7567 | 12 18.7 | 35.0 | 41.0 7631 | 20 87.4 | 21.0 | 56.0 59 14.84 |— 4 39,59 |—11.17 24. 03 7664 | 24 81.2 | 33.5 | 43.0 7698 | 22 22.0 | 35.0 | 42.0 35 05.17 |-+- 1 23.42 |— 4.50 24.09 7742 | 25 64.1 | 44.5 | 33.0 7754 | 15 42.3 | 42.0 | 35.0 48 54.31 |4+ 5 28.87 |+ 5.04 22, 22 7807 | 21 10.5 | 33.0 | 43.5 7815 | 20 54.5 | 34.5 | 42.5 15 64 11.54 |4 0 18.02 |— 2.32 27.24 7850 7 23.5 |) 41.5 | 35.0 7923 | 14 83.3 | 35.0 | 43.0 36 01 05.96 |— 6 39.16 |— 0.41 26.39 7961 | 11 28.8 | 31.5 | 47.0 7975 | 34 82.4 | 31.0 | 47.5 35 42 05.58 |4+-12 23.02 |— 8.72 19. 88 8058 | 24 90.2 | 33.0 | 46.0 8079 | 21 02.0 | 35.0 | 43.0 35 56 04 17 |— 1 32.76 |— 5.72 25. 69 8097 | 16 43.2 | 35.5 | 43.0 j 8110 | 28 68.0 | 35.0 | 43.0 36 01 03.78 I— 6 34.20 |— 4. 22 | 35 54 25. 36 Date. Number of star. FORT UNION, NEW MEXICO. 1873. August 29 August 30 . 8153 8182 6091 6159 6237 . 2563 6302 6307 6438 6470 6500 6528 6566 6574 6602 6626 6690 6731 6762 6779 6824 6858 6918 6933 7105 7149 7176 7223 LI. 40335 7233 7275 7294 7368 . 3424 7444 7455 7493 7527 Sra oe PFs, =o Se OCs No, So So So as wr wo wy Be wey NN NH DMO ww an SO So SS oa oe wm woo oon Fe aS si i 0D ar Ww im on a3 SS BH G2 20 2 90 Rio SN SH wo me wo gene? = See) Nooo So Soo Tee oom Ss too oom oo solo som Hon oer Hote ac Soo ou oo oo oo ane mo wo mo wo ee ae oe no Half-sum of declination. 35 45 05. 41 35 46 06,15 36 06 08.73 35 47 41. 64 54 54, 01 51 58. 25 39 45 13. 38 36 04 09. 84 36 03 29,14 35 49 49,28 30 54 37,54 36 00 37.63 35 54 37. 04 36 03 43.61 35 50 37.49 54 20. 84 55 58, 14 54 00. 68 LATITUDE DETERMINATIONS. Observations and computations—Continued. Corrections. Microm. , and refr, Level. a“ “ + 9 20.63 |— 2.18 + 8 21.32 | 3.54 —11 34.68 |-11.99 + 6 41.31 |— 0.00 — 0 2.97 |— 4.36 + 2 28.85 |— 9.81 + 9 23.69 |—13. 62 —10 00,93 |4-13. 62 — 8 58.26 |— 1.64 + 4 36.85 |— 1.09 — 0 11.36 |— 1.91 — 6 10.13 |— 0.00 — 0 07.50 |— 6.27 — 9 11.66 |— 3.82 + 3 34.93 |+ 7.09 — 0 04.64 |4 1.64 -—— 1 29,41 |— 2.72 + 0 23.69 |— 1.91 + 3 55.77 |L 0.76 339 Latitude. a“ 30 54 23. 86 23. 93 22. 06 22. 95 24. 68 17.29 23, 45 35 54 23, 54 d04 ASTRONOMY. Observations and computations—Continued. FORT UNION, NEW MEXICO. Date. 1873. August 30 Number of star. 7567 7631 7664 7698 7807 7815 7850 7923 Microm. readings. t. 14 23 21 19 20 20 27 15 = lord 2) . moO Mo (relive) an CO FW OF be ON oo oa or Level. ~~ =H) me wo wR noo ete ae GMC) SI) Ciey re Ce Cie we oe wo Bo GY ila GHGS GS Corrections. Half-sum of z Remarks, ecimntions one Latitude. and refr. Level. i Cole A] “ 7 “ “ QO “ 5 0 35 59 15.10 |— 4 44.32 |— 6.00 | 35 54 24.78 0 0 53 05.50 |+ 1 16.22 |4+ 4.09 25. 81 5 0 35 54 11.98 |+ 0 14.77 |\— 8.99 17.76 0 5 36 01 06.24 |\— 6 32.77 |+ 3.13 | 35 54 30.60 Notes. A single observation of pair 1, made August 29, was rejected. The whole number of micrometer readings is not given, and there is probably other error in it. In pair 3, observed August 24, a wrong star appears to have been taken. The observations made August 30 on pair 8, August 29 on pair 17, and on pair 31, have been rejected. They differ from the final mean —75+9"1+411"4 respectively, and their level corrections are— 9.8 SB pS GUAG! Individual results. No. of | No. of | Latitude uncor- pair. | obs. rected. fe} i a“ 38 1 35 54 19.88 5 1 22. 06 11 2 27.55 9 2 24.72 41 1 23. 86 2 2 23. 95 18 1 23.99 5 bis} 1 25. 28 15 2 24.7 6 2 24. 00 29 1 27.72 35 1 3} 28, 22 14 4 24,55 24 2 24. 02 28 2 24, 42 31 2 23. 85 25 3 21.39 8 3 22.20 4 1 35 54 21.75 Be TON Oo BR BON OO NED D6 £0 60 == 90 DERWOHARNOCDORMWRWWODE t+4ttbt4+4+4444+4+4 444+ No. of| No. of | Latitude uncor- ay pair. | obs. rected. Bu a. “ ° 1 “ 1 “ + 1.61 32 1 dO D4 oon + 1.4 + 0.18 TL heh ||| 24 lle & DA-Aa |e 163) 4S OLa7 + 1.29 30 3 25. 43 + 0.4 + 0.05 + 1.21 36 2 22.50 + 0.3 + 0.04 + 1.21 26 4 22. 66 0.0 0.00 + 1.09 | 16 2 22. 84 — 0.1 — 0.01 + 1.08 22 4 24,51 — 0.2 — 0.03 + 0,92 2G 4 25. 26 — 0.4 — 6.05 + 0.90 20 1 7.78 — 1.0 — 0.13 + 0.88 |} 27 2 95.98] —1.4] —0.18 + 0.78 || 39 1 25. 69 — 1.5 — 0.20 + 0.7% 13 1 22.81 —1.5 — 0.20 + 0.60 | 33 2 24. 43 — 47 — 0.61 + 0.60 19 1 27.50 — 6.2 — 0.81 + 0.53 40 1 25. 37 — 6.6 — 0.86 + 0.51 || 37 2 Sai = eG] tee + 0,48 12 2 28.58 — 9.0 —1.17 + 0.31 23 2 29. 46 — 9.2 — 1.20 + 0.30 10 2 35) toa) (22574 — 9.9 — 1.29 FINAL RESULTS—FORT UNION, NEW MEXICO. 335 In the preceding table A gis obtained by adding 0.140 for each micrometer revolution, or 0’”.i30 (= o”40gera ) for each minute of Am. Final results corrected for Ag: fo) J “ 14 pairs observed once each .....-.-.-.---------- 2-22-22 tees sees 35 54 25.12 16 pairs observed twice each .....- ...-.----- +--+ ------ +--+: Siento n rOO OL ZO. 4 pairs observed three times each.....--.----.--- ---.--------++ +-- 35 54 23.62 4. pairs observed four times each .......-.-.--- -. eeneee sees eee ---- 3D D4 24.38 Giving each pair once observed a weight of 1; each pair twice ob- served a weight of 14; each pair three times observed a weight of 2; and each pair four times observed a weight of 2$, this final result is derived: Latitude of Fort Union (sun-dial), 35° 54/ 24.86 Wt. = 56. Probable error (weight = 1): From pairs observed once ..--..-.-.----2- 5 s2-4 2+ eee nee ee eee eee ee apo eal GTS) From pairs observed twice....-.-.- Sage eietee Ree Ae Se Sa ee reve po ete + 1.74 From pairs observed three times ...---.--------.--- -------- Preface tes + 1.89 From pairs observed four times . ..-. -.-.-------- 2 +--+ 2-25 ee 2-- eee eee + 1/11 WRENS SNG HOUth s cooons saeoasdoe sdoue ousuoe sa0a00 bogus douedoosedbaCe + 1.63 Hence the final probable error of the latitude will be + e222 ASTRONOMICAL CO-ORDINATES OF FORT UNION, NEW MEXICO. Longitude.. 7" 00™ 038.41 or 105° 00! 51.15 + 0.13 vest from Greenwich. oe -- 1» 51™ 512.29 or 27° 57’ 49”.35 west from U.S. Naval Observa- tory, Washington, D. C. Latitude ..- 35° 54! 24.86 + 0//.22 north. U. 8. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN, ist Lizut. GEO. M. WHEELER, Cores or ENGINEERS, U. S. ARMY, IN CHARGE. RESULTS OF OBSERVATIONS MADE BY PROF, T. H. SAFFORD, JOHN H. CLARK, AND DR. F, KAMPF IN THE DETERMINATION OF THE ASTRONOMICAL CO-ORDINATES OF SANTA FI, NEW MEXICO. SEASON OF 1873. COMPUTATIONS LY Pror. T. H. SAFFORD, JOHN H. CLARK, AnD Dr. F. KAMPF. 337 22, AST ) 4 es “oo é = » 6 = ay . - oa . . a , - 5 oes . \ ° 4 ee 4, . a + = of SANTA FRE, NEW MEXICO. GEOGRAPHICAL POSITION OF STATION. Longitude, . . 105° 56/ 45/7.22 4+ 6.32 west from Greenwich. Latitude,. . . 35° 41/ 19/.29 + 0.15 north. Barometric altitude of observatory above sea-level, 7044.2 feet. Various determinations of the position of this town have been made, of which the earliest known is Lafora’s, given in the astronomical results of Humboldt’s Travels, and since repeated year by year in the Connaissance des Temps. He places Santa Fé in longitude 107° 13’ west of Paris and latitude 86° 12’ north, which is about a degree east and half a degree north of the true position. Lieut. W. H. Emory, who accompanied Kearney’s column as chief engineer when New Mexico and California were occupied by the United States forces, determined a series of positions along the march which have been of great value in constructing the geography of New Mexico and neighboring regions. Among these occurs Santa Fé, which he fixes in longitude 106° 61’ 23”, and in latitude 35° 41’ 06”. His latitudes are manifestly as accurate as the sextant would give them; any additional dis- cussion, as, for instance, of the difference between north and south stars, would alter the value but a few seconds at most. The longitude he gives as quite uncertain. It is derived from the chronometer, which may not have gone quite regularly in passing over the road to Santa Fé. Moreover, for the longitude of Fort Leavenworth, his starting-point, he has assumed Nicollet’s determination, which is 94° 44’ 00”, a value now known to be wide of the truth. Comparing Nicollet’s longitude of Fort Leavenworth with Lieutenant Ruffner’s determination of the same, as computed by Professor Safford, the result gives the correction necessary to be applied to Emory’s work :— Rufiner’s longitude of Fort Leavenworth..........-.----..-.------. 94° 54! 35” Nicollet’s longitude of Fort Leavenworth............-...-.------- ... 940 44’ 00” @Orrecilom seme swe are ore aie vole nisig See oes wees wyni HPGmic secede + 10! 35” 340 ASTRONOMY. Emory’s chronometer-longitude of Santa Fé.......-----~--.-----+--- 106° O01! 23” Correction of error at Fort Leavenworth ......-.--.-..---+-.-------- + 20! 35” Emory’s corrected longitude. .....--------------------- ---- 106° il’ 58” Lieutenant Emory also determined the longitude of Santa Fé by one night’s observations of lunar distances, which gave 106° 04’ 38.4. This requires a correction for the error in the moon’s place as given by Burck- hardt’s tables, which would be about + 7’, as the lunar tables gave the moon’s longitude too great by about 15”. After Lieutenant Emory had left Santa Fé, his junior officers, Lieuten- ants Abert and Peck, who were detained by illness, made a reconnaissance of New Mexico, and executed a map from a triangulation of the Territory with the sextant. This gave Lieutenant Whipple the means of locating Santa Fé in nearly its true position with respect to Albuquerque, of which town he determined the longitude by several months of lunar culminations. Upon his map, in the third volume of the Pacific Railway Reports, Santa Fé is placed in longitude 105° 55’, a closer approximation to the truth. The situation of Emory’s station in Santa Fé is no longer known, but that is a matter of comparatively little importance, as the town is not very large. From a comparison of his latitude with Mr. Safford’s it may be inferred that it was near the church of St. Francis, or, perhaps, in the plaza. PHYSICAL GEOGRAPHY DETAILS. The town is situated on Santa Fé Creek, a tributary of the Rio Grande. During the time of observations here this stream was very diminutive, and its waters were pretty thoroughly used in irrigating, as the season had been one of severe drought. According to Abert’s report the creek disappears in the sand a few miles below the town. In exceptional years it sometimes overflows, and has been known to carry away bridges. The houses in Santa Fé bear abundant testimony to the dryness of the climate. One of the churches is said to be over two hundred years old, a'though built of adobe, like most of the houses in the town. Santa Fé lies on a plain gradually sloping to the creek, which is sur- rounded on all sides by hills and mesas. Its situation is very picturesque when seen from a distance. Directly to the east is a chain of high mount- OBSERV ATORY.—ASSISTANTS. 341 ains, to be designated upon the published maps of the survey as the Santa Fé range. The town is the seat of an extensive trade, of which the commodities are brought from the railways of Colorado and Western Kansas by ox and mule teams and distributed throughout New Mexico. The agriculture of this region is quite primitive in its methods, but, with the help of irrigation, produces fair results. ‘The wheat of the Territory is especially good. Great opportunities for pasturage exist, but, as the common beast of burden is the burro, or small donkey, it is probably difficult to keep horses in good condi- tion; these are sometimes fed on hay made from a species of rush. METEOROLOGICAL CONDITIONS. The yearly rain-fall is about 17 inches, according to Schott’s map. This is nearly the same as at San Francisco, and larger than at Los Angeles, to which Schott assigns about 12 inches, or at Denver, where it is about 14 inches. When this station was occupied, it was in the early part of the rainy season. Little rain fell, but the clouds interfered much with observations. Otherwise the climate was extremely agreeable, being dry and mild. The transparency of the atmosphere was not so great as might have been expected. The test-objects employed to determine this have often been seen by the astronomer almost as distinctly at Denver, or even at Fort Hays or Chicago, all of them at less altitudes. The reason for this may be found in the season of the year. OBSERVATORY.—ASSISTANTS. The astronomical station is situated upon the military reservation, i. that portion which is known as the old Fort Marcy parade-ground. In order to admit of the location of the meridian-line, the monument, since Mr. Safford’s determination, has been moved due west 5.83 feet, or 0° 00‘ 00.07, giving the value for longitude which stands at the head of this report. The new position of the station is marked by a heavy stone pillar, about 4 feet high. On the mesa, 1,926.428 feet north of this monument, a stone merid- ian-mark was planted. 342 ASTRONOMY. The customary wall-tent, with suitable openings, was used as an observ- atory. This was afterwards framed, to guard against accidents. As there were two instruments engaged, and but one observing-pier, the former were set up when their use demanded and were removed every night when work was done. The astronomer was assisted by Private Winker, Company D, Battal- ion of Engineers, who was found very capable and painstaking. The drill of this corps appears to attract good men and make them more competent to perform the duties of an assistant astronomer than any other persons save the very best mathematicians from college classes or technical schools. Mr. Gough, the telegraph-operator, rendered excellent assistance. The line employed was the Western Union; the route was from Santa Fé to Salt Lake City, via Denver and Cheyenne. DESCRIPTION OF INSTRUMENTS. The instruments used were a zenith telescope and the Wiirdemann transit No. 18. They were originally made for the northwestern boundary, some twenty years ago, and were not in the best of repair. The transit was twenty-six inches in focal length and two inches in aperture. Its op- tical quality was excellent, but its mechanical parts needed a thorough repair. The frame of the transit and the side adjusting-screws of the levels were badly bent. It was with great difficulty that accurate results were obtained, as the level would vary unexpectedly from time to time, although every care was taken to place it correctly and delicately in position. Ap- parently the motion of the telescope was irregular, and the pivots did not retain a fixed position in the Y’s, which were somewhat bent. ‘The proba-_ ble error of the observations with this instrument, and the difficulty of their reduction, had been constantly increasing during this astronomer’s experi- ence with it. The observations were so arranged that the instrumental defects would be thoroughly eliminated from the result. The observed stars were as near the zenith as could be found, including, of course, sufii- cient polars for the application of the azimuth correction in each group. As the packing-boxes of the instrument were somewhat out of repair, it may have suffered by transportation over the Kansas Pacifie Railway CONNECTIONS.—OBSERVERS.—COMPUTERS. 343 and the roads of New Mexico. Efforts were made to secure some trifling repairs at Santa Fé, but with little success. The zenith-telescope had a larger aperture, two and three-fourths inches, but was not sensibly better in optical power. The observer found it quite unstable, and would have taken it to pieces had he been sufticiently acquainted with its parts to feel assured of his powers to reconstruct it properly. It is thought that the newer constructions of the zenith-telescope are to be pre- ferred for stability and substantial and lasting firmness. CONNECTIONS.—OBSERVERS.—COMPUTERS. Telegraphic connection was made with John H. Clark, at Salt Lake City, on June 25, July 1, 2, 12, 14, and 17, and with Dr. F. Kampf, at Hughes, on July 12, 14, 17, 19, and 21. The longitude of Santa Fé, therefore, depends on eight nights of work. The two nights on which Dr. Kampf, at Hughes, was accessible, and Mr. Clark, at Salt Lake City, could not be reached, undoubtedly strengthen the determinations much, as Dr. Kampf had a chronograph and an admirable transit-instrument of Wiirdemann’s largest size, and his longitude of Hughes is consequently very accurate. Latitude observations were made by Prof. T. H. Safford, observer at Santa Fé, on June 27, 28, July 4, 23, 26, 27, 28, 29, and 30, nine nights in all. These were much interrupted by the clouds, and affected by instru- mental difficulties. In addition, time-determinations were made on seven nights on which the telegraph failed. The observations at each station were reduced by the astronomer at that place. Professor Safford submits the following notes upon the tables of time- reductions for Santa Fé and Fort Union. In all these cases the first opera- tion was to compute approximate values of azimuth and collimation, which was accomplished in the followmg manner: Every group of about five stars gave a corresponding number of equa- tions of the form a—T+dt+ Aa+ Bb+Ce; or a—T— Bb=dt+ Aa+ Cc, in which AT, a, and ¢ were unknown quantities. These were now so arranged that the equations derived from stars of nearly equal declinations 344 ASTRONOMY. came together, and the means of the right and-left hand members of the equations were so taken that each group gave two equations, one with a positive co-efficient of a, the other with a negative co-efficient of the same unknown quantity. Eliminating a, there was left one equation from each group, in which AT and ¢ were the unknown quantities. The two groups which make up a complete time-determination then gave, by proper elim- ination, the values of these quantities. As an example, we may select the last time-determination for Fort Union: Name of star. le Ge 10 25 59, 67 LT Wore PPP eee 2 3 2 1 2 1 4 1 EH OOrRWRhOU SCMOUNWE wD = 8.0 + 0.4 = 0,8 = (Ii ei 35 OF ibe + 0.2 The equation from the first star is— 10° 25™ 598.67 = AT — 3.02 a+ 4.56c¢ that from the mean result of (2), (3), (4), is— 10° 26™ 4°.04= AT + 0.03 a+ 1.25¢ Hence, by elimination— 4°37 = 3.05 a— 3.31 ¢ 1843 = a—1.09¢ 10°26" 4°.00= AT+1.28¢ Similarly from (5), (6), (8)— 10° 26" 68.08 = AT + 0.21a—1.10¢ And from (7)— 10° 26™ 5°.62 = AT —1.64a—2.92¢ By elimination— 0°.46 — 1.85 a+ 1.82¢ 022) a+ 0.98 ¢ 10°26" 6.03 = AT—13le NOTES ON TIME REDUCTIONS. 345 The two equations containing a and c only give a=-+ 0°81 e=— 08.57 and the two containing [ AT and ¢ AT = 10° 26” 5°00 C= — 0°.78 The difference between the two values of ¢ arises partly from error of observation, partly from small changes in the azimuth at reversal, partly from uncertainty in the adopted rate. There was a previous time-determination on the same evening; for these provisional values I assumed, combining the two, AT, = 10" 26™ 4°.96 h= + 0°.90 oo — 0°70 and the least square solution from the eight equations above cited gave AT = 10" 26™ 5°.013 + 09.044 C= — 0°.733 —- 0°.029 a= + 0°.813 + 08.064 In case the vaiues of ¢ had differed much more than 0°21 = — 0°.57 + 0°78, I should have assumed a sudden change in a at reversal; this was, indeed, often necessary, because the axis of the telescope did not properly fit its Y’s. The next step was to form and solve the least square equations. I employed the notation a=a,+da C=C +de and, of course, made A,T' = resulting error of the chronometer after the mean of wires is corrected for rate, level, and approximate azimuth and colli- _ mation. The advantage of this is that there is much less danger of mistake, as the resulting da and de should be very small, if the instrument is SUC) at reversal, and, if not, the fact i is at once indicated. 346 ASTRONOMY. As I have always been doubtful about the stability of Wiirdemann 18, I have arranged the observations so that each group of about five stars contains time-stars as near the zenith as possible, as well as one or two polars; a precaution useful always in giving a resulting AT with a large weight. The formation of the sade square equations was facilitated by tables. I gave as a weight to each observation the quantity w= pp 1.3 where a 1 + 0.3 sec? 6 and p' =0.2forl wire ; = 0.4 for2 wires = 0.6 for 3 wires = 0.8 for 4 wires ' = 0.9 for 5 wires = 1.0 for 6-9 wires The values A /p = sin (p—6)cNVp 1.3 C /p=sec 6 mAs 5+0.3 as well as Vp, can be readily tabulated. This I did, however, only with their squares and products. ae =p clamp west. ae 99 = A*p The notations ee, ef, eg, &c., I employed in the solution, following Gauss’s model. a ei p Changing the signs of ef and fg for f J If then 6 T /p=2, the equation for each star will be O=n+e6T+ fde+ gda NOTES ON TIME REDUCTIONS. 347 Of the stars quoted as observed August 27, x Cephei was observed on 5 wires and ¢Cygni on 4; all the others on 6 at least. From these the following squares and products were computed :— n oT=F: mn. en. fn. gn. ee. ef. Cy. Sf. S9- 99- 8. Weight. « Cephei -...|— 0.61 |0.060 |—0. 099 |—0. 449 |+0.298 | 0.162 |+0.736 |—0. 488 | 3.362 |—2. 224 /|1.472 e Delphini --| 0.00 (0.000 | 0.090} 0.000 | 0.000 | 0.992 |+1.010 |+0. 427 | 1.029 |-L0. 435 |0. 184 a Cygni -.... + 0.11 0.010 |+-0.090 |+0. 126 |—0.020 | 0.814 |+1.148 |—0.178 | 1.619 |—0.255 0 039 vy Cygni -.--.|-+ 0.13 0.014 |+-0. 111 |+-0. 146 |—0. 012 | 0.54 |41.127 |—0. 094 | 1.486 |—0. 124 |0.010 @ Cysni ----- — 0.16 0.019 |—0.119 |+0.136 |—0.015 | 0.744 |—0. 850 |--0. 092 | 0.986 |—0. 106 |0. 011 1 Pegasi-....|— 0.18 0.031 |—0.175 |4-0.186 |—0.053 | 0.973 |—1.031 |+-0. 293 | 1.093 |—0.310 0. 088 B Cephei .-..;— 0.09 |0.003 |—0. 034 |--0.096 |-++0.054 | 0.365 |—1, 066 |—0,598 | 3.118 |4+-1.745 (0.930 « Pegasi-....|— 0.12 |0.014 |—0.114 |40.126 |—0. 024 | 0.952 |—1.051 |-+-0. 197 | 1. 160 |—0. 218 |0. 042 Sumseecs| eee sees 0,151 |—0. 340 |-+-0. 367 |-+-0.228 | 5.856 |-+-0.023 |—0. 349 |13. 853 |—1. 054 |2. 826 The total increase of labor owing to the introduction of weights is very trifling, and is fully counterbalanced by the saving in the solution; where the co-efficients [ef], [eg], [7g], are much smaller in proportion to [ee] and [ff] than they are where the weights are all made =1. The opinion has been expressed by good authority (Wagner, of Pul- cova) that this last process is no more accurate than the approximate solu- tion itself. INSTRUMENTAL VALUES.—TELEGRAPHIC COMMUNICATION. The wires of the transit instrument employed on June 25 were found broken the next morning. A new set was inserted by Lieut. C. C. Morri- son. They were rather too fine, it is true, but still they served a good pur- pose. Their intervals were carefully determined for clamp east, and in the mean were about 89°64, 675.32, 44°.32, 23°.06, —1°28, —22°.92, —45*.04, —66°.04, —89°.07, with signs changed for clamp west. There were some indications of change in the intervals, and so the reduction to mean of wires was made in the field, giving values slightly different from time to time. These were always very carefully revised. The value of one division of the level was taken as 1’.00; it was not in condition to be very accurately determined by the means at hand. The 348 ASTRONOMY. uncertainty remaining in the longitude on this account will be very small and quite fully exhibited in the probable error. The value of one revolution of the micrometer of the zenith-telescope, as determined by Mr. Safford in 1872 at Denver, was 64.37. The present observations afford means for correcting this value, which will not affect the result, however, as the stars were so selected that the micrometer-correc- tions for the different pairs were about as often positive as negative. One division of the zenith-telescope level was equal to 1.09. The length of the telegraphic circuit, from Santa Fé to Salt Lake, via Corinne, was about 1,100 miles. Repeaters were used at Denver, Cheyenne, and Corinne. From Santa Fé to Hughes the distance is 450 miles. The batteries used were those of the telegraph company, as there was no electro-magnetic apparatus in the astronomical outfit. On some of the nights the chronometer was carried to the office at the headquarters of the district of New Mexico; on other occasions it was taken to the ordinary telegraph-office at Mr. Gough’s house, not quite one-fourth of a mile from the station. No sensible inconvenience was caused by this. TABULATION OF STARS. 349 Tabulation of stars used for determination of time at Santa Fé, New Mexico, and Salt Lake City, Utah, 1873. SANTA 6, NEW MEXICO. SALT LAKE CITY, UTAH. Name of star. Sls ilS|SiSlS hale le leleie se zt Meso ee era eet Lac) PE PTSD Pen |e eal ee fale, eile | El Eee WE ee Eel] Eb ete (Er eee eh || ey it | [ey lees | | Pie ee sy SS se ty Tas eS rs a le RL Soper teoc sh Seees Mcece. comaller esoleeoe| {eo - aloe celle 2 28) Ildeee| Ibe = Elec |ereete Groombridge 2125 ....-. .----. aoa Sc][aene|[4s55]|oace S65) (oscq|asee| lace =: Bee Rees taco 6 IBOObIS Mao aa eda sioeee ese eel meee see se 5) (Og eae eae Ben Bel esa satel eeeiel (nesses (seseke| lescae ot leee 5) (Wrsse" Minoris}.o2--2 --<5-5<222 Femelle 355 | S28 | leases lacs] oon||= Sal ca lee $2) nyaal| ears aS g IBOOUIBE A sase cacmtoces ce essen MOS z S . . Bee nce eeea ee (seers Pemaleses fix MOMS heccs a coe cserseceiect |osze!|=se 2ec|leese||seca|leeso||Sa-allsoaol| 26, || PS ll] e.5 INEess [eee lesea| cose € BOOS oo 52c.c eal Se ESE 5s6||aeoa|(s5 tele ae} Serge [so ealee aces ecillan sal asei[e ots [SAMO a asou sos cou caso badnees||es5gl|s5= ---|----|----]---- soljocecc|| &< |oaca)) SS" \[Esse|leese||toe4isaos yp Booviss 2 teece=- see ee cs eee R ilesae|pSSae = 5 =oJon elle 2/53) (So.Selian Gol |oo.os|la4 ce) Geen os on 48 oer Weean| eS jlo ae Seon By W Ani bras 5 Seek eee me eaten Ae RA ek cin elles Lee |S ae ce al, alters | 6 eee |S Me a) eof ee e-loe melee wel ue melee en 3) See 0 2 On| OS | ok || RS deca E] =. bl saral) O16 eeu] a teaes (Sa ee 8) Libra sseeeee es: tose seo Séacl|s= See |\ees9) bese ||5555|esse||RSaa\sees il) Sat cl occa bese y lls ae v ISLS, De cco ds0 Ge en75 sonecise 60) [Bsa | (Seen |e See pees) ears) eee 32) |e S8ce bose! (Bae) [boc eee Pees a Coroner eceean eee sees os eal | PS | ee | ee ea ate) Sere! eee ie OS ES x |x qo” (Serpenbissossneee eos cse same 53.A8| See! soe S53) 548e Gare ss |e ae Pe Nl) BS BES yee y Corons recces pecs cores eees| XM |X | X | X |----p eee [eee -| se [eee |---| = |---| eee |e eee] eee a Serpentisi.22-eescn ese eee aa| leer an | eres Sees eS eee eeenl| seen (snes! ose || Malls ae cAI K SENDS cose cosssoes5-/9555| [455 3 |[oosc|| 6 || sS3el|o=selloece| eee] |Psee| Asee|leSae Siar | o?4 sven [Ree SEE Mg eceess50||Eome| ke Sal aoe socal |S8 35] Ss ce] Solen| Eo sal ies os G Ursz Minonis).22s2- 22 Ssee<22 alone sorce| eels Seloees|ssSelleeeq) boes|Basalls mevnal| sateel | || oes y Serpentis s2-||-S52||s45¢ XS |lesoe||ocse|loeas 256) /Soea|ease|fae ox|lae salle 85] lbe celloo cts ta) Scorpil------ 2 }Sa87 [53s] Paella bse ae esl eee al den! aera (eM Vea Sc) Seer ese BE SCONpli--s2e-ras sane eee eee nels 22|eas sos. flees soe les we 2 S56 Nix lexX 6 Draconis sacle yee eae ae eee & |leseel|Seéal|sec Be pees Seer sso Groombridge 2320 Saree [eee eee (emma Rel Fe ast eps |e weteclamculee SSulk pe ae a) Opbiuchi Se 2S 9 etl Reger SST ened) eae |e a ea (Oe [ey 2 ee é Ophiuchi adel) 2S elS5eei tess lecce! sees Sane lsece| jsese Gor) leer fescsllse- 5 € Herculis-- aces seccet fess. A SE Pree | ee teal cera | Sree bafcesseil eer oil erected ca cee ese a mal ee a Follpnaall Gackt enn. lames a IGKCMNISS 22 oo eise a= eiacise esol iac enlaces San] Ser eee! eoepeet eile cine macy sane ey ie. | eee fo sas 72 = Herculis...- eee |e Fe See sree > all Cea 43 rs | eee eer) (can Paes Groombridge 966, isi ie SeSB SSC Saag pooSl | ase BE | ote ese ees (Seer Seen) Sere! Issel (cman eh) (eee (spe a Ophinchi .. sosos ies noel Eaosl=Sc| feaeo| scce||Sece| P< | leceacl eee) leaps accel fecee] le See eae @ Draconis $565 Ss0c| (-S55||S555) S24] fenes| ose lose leoe sq) tea] | 2S Ice) S53) seo 7 LE GOR ask See SR e APSE Oen Ss See [Sebel peta) este) Geert sece! (dees Sch aatl] KOM eee ee acl ccl eee = ib: ~~ IDENT She eos paseo oss eccns| enc s| seed [ane St) coe [eee eset oaee| laemct [aaa] (eee (Seu |" Sea] | e
      ) /oS0e) (SS4) Sao6) ass \|-aee sccdl| OS |fsosdijace |[es lis Sec | eal ca lies Seal) 2S Hesea| S|) os Px elec sale Baas Pee = ssas|) 2S Hesse}] OX jlsese xX | Xx Xx July 17. xX Soc! {s2se) + as == == = a ==--)\so25) S52 = >} asl less sass =}orxe [lesen [ssc] acd lsnosiiSoce = ES SS Ih Se | eile || Seaisei lee x SSA lsascl| 2S |lesaallsena) |socs) Se6s)/Sseclllesac tet Saos\| OS \lseaailss o5 Se solleses|fseselié <= i fel (ISei| Se NSS |leacal| Se Hese |eseallessa|lacoa|| 3¢ llsesc|[e=- > |lossallesee!lesec|lsosel|seue) sess) jose ee. Be (Se ERR | Bene |S = 36 locen|leesal| 32|| XS ||eoue| 5X a secs! lpess/lscss DS |leses|lscee||scce! loa — Sas] oe ral oa | ea (ee Ses a ssos)|4oc2)/Sac¢ x eet >< le — weclleecellsasc xR Seal loake oa ne. | es eee SES Eas! eens} |p So. =-2![6sos)[s=s- 4/5545) SS58) Sa5e) ees) [2264] sce] SS! bone) esse) Son: =e) \ssorlesce Nas S65 lees acc s|leses\jecedlesse Me \lekeel Scoailees4) lace ao = lecsel|osccllecee DG et Bs] soc) oes! Sees) (S55) Sa aperccileses!|-sso}[ecs sac) 204 x Sso5 a|[ecse|isces|lcace > sas\loo ce |sse- == o)jeesa)|eeedssss DS |leqsajjecs =< Bo eae! sane) ees! Ssc-] ese | Clamp. S24Shhesee Beesdaa TIME DETERMINATIONS. Observations and reductions for time taken at sending station. SANTA FE, NEW MEXICO, JUNE 25, 1873. 351 Name of star. Aa. Ce. a, AR. AT. Ram 8: 8. 8. ch hem. 8. hom 2. hm. 8. Groombr. 2125.) 8 15 06.61 |+ 1.13 |+ 0.25 |— 1.86 | 8 15 06.13 |14 28 18.28 |+-6 13 12,15 G {Bootisince eee 21 55.79 |— 0.49 |+ 0,13 |— 0,94 21 54. 49 35 06.57 12. 08 Piazzi XIV, 221. 37 04.49 |— 0, 48 |+- 0.12 |— 0.94 37 03.19 50 15, 25 12. 06 2H. Urs Minoris_.. 42 25.27 |+ 1.66 |+ 0.24 |— 2,27 42 24,90 55 37. 37 12, 47 wi Bootists-es ...2 45 50.86 |— 0.21 |+ 0.10 |— 1.02 45 49,73 59 01.93 12. 20 oF -Bootisieseeas see 57 11.90 |— 0.05 |— 0.51 |+ 1.09 57 12.43 |15 10 24, 82 12, 39 y Urs Minoris...| 9 07 44,44 + 2.55 |— 0.88 |-+ 2.98 | 9 07 49,09 21 00. 88 11.79 vy Bootis, pr ...... 9 13 10.76 |-+ 0.17 |— 0.44 + 1.21 | 9 13 11.70 /15 26 24,05 +6 13 12.35 a@ Corone ........ 9 15 38.06 |— 0.41 |+- 0.47 + 1.18 | 9 15 39.30 |15 29 20. 47 +6 13 41.17 Yo Coronwt-secce o 5 23 43.88 |— 0.43 |-+- 0.32 + 1.17 23 44,94 37 26. 46 41,52 12H. Draconis. ...... 31 01.14 |+ 2.49 |+ 0.14 + 2.31 31 06. 08 44 47,14 41.06 Gey rate cae 12 18 57.57 |+ 0.17 |+- 0.08 + 1.34 |12 18 59.16 |18 32 40, 47 41.31 Groombr. 2655... 22 03.63 | 7.56 |-+ 0.21 ++ 4.82 22 16, 22 35 57.96 41.74 110 Herculis ....... 26 31.82 |— 0.69 |-+ 0.06 ++ 1.12 26 32.31 40 13. 85 41.54 6 Serpentis ...... 36 17.88 |— 1,96 |+- 0.14 |— 1.05 36 15.01 49 56.27 41, 26 y Gyre .22.. 5. 40 33.68 |— 0.24 | 0,07 |— 1.24 40 32.27 54 13.66 41.39 Ge pAquilasecse nee 45 57.37 |— 1.43 |— 0.02 |— 1.08 45 54, 84 59 36. 28 41,44 6 ODraconis....... 12 58 50.81 |-+ 5.11 |— 0.13 |— 2.74 [12 58 53.05 |19 12 34.38 +6 13 41.33 NORMAL EQUATIONS, First series. 0 =— 1.386 + 6.01 dt— 2.18 ci — 0.87 a ot = + 03.144 ATo=-+ 65 13™ 128,06 0 = + 1.485 — 2.18 dt +-114.67 cl — 0.52 a! co! = — 08,093 o=+ 12,00 0=- 1.045 — 0.87 dt— 0.52c!+ 2.66 a! a’ = — 08,364 a= — 02.936 Second series. Before reversal— 0 =— 08.162 +- 4.43 dt +- 6.25 cl — 0.54 al Ap = — 28.426 0 = + 02.225 — 0.54 dt — 2.96 a + 2.34 al Co = -+ 15.000 After reversal— : O=-++ 08.427 + 3.33 dt —4.21¢ + 0.38 a! do = — 38.485 0 = - 02.289 + 0.38 a! + 0.57 cl +1.24a) Co = -++ 18.000 Eliminating a' from each— =— 03.113 + 4.43 dt + 5.73 ct dt = — 08,038 O=-} 05.351 + 3.33 dt — 4.55 cl, cl = + 08.049 ASTRONOMY. Observations and reductions for time taken at sending station—Continued. SANTA FE, NEW MEXICO, JULY 1, 1873. & EI Name of star. T. Aa. Bb. Ce. Aue AR. AT. a h. mM, 8. 8. 8. 8. Ly Ti EE hem. (a: hm 8. W.|6 £Bootis --....-.. 8 33 34.65 |— 0.06 |+ 0.05 |-+ 1.13 | 8 33 35.77 |15 10 24.77 |+6 36 49.00 W.| y Urse Minoris 44 05.76 |4+ 2.91 |4+ 0.10 |4+ 3.10 44 11,87 21 00.58 48.71 W.| a Corone....-..-- 52 30.54 |— 0.25 |+ 0.04 |4+ 1.06 52 31.39 29 20.43 49. 04 Walle. (Coronas. ese 9 00 36, 42 |— 0.26 |+ 0.02 |+ 1.05 | 9 00 37.23 37 26. 42 49.19 W.|« Serpentis .-.--. 06 13.61 |— 0.46 |4+ 0.01 |+ 0.99 06 14.15 43 03.19 49. 04 W.| ¢ Urs@ Minoris.-- 11 44.97 |+ 4.91 |— 0.02 |+ 4.60 11 54. 46 48 43.38 48. 92 W.| @ Draconis_...-.-. 22 41.36 |4+ 1.13 |— 0.05 |4+ 1.82 22 44,26 59 33. 22 48. 96 E.| y Herculis -....-.. 39 33.97 |— 0.44 |— 0.31 |— 1.00 39 32.22 |16 16 20.95 48.73 E.|7 #ODraconis....--- 45 31.72 |4+ 1.38 |— 1.01 1.99 45 30.10 22 19.48 49. 38 E.|o Hercnlis...-.---. 9 53 15.78 |+ 0.25 |— 0.88 |— 1.28 | 9 53 13.87 |16 30 02.73 |4+6 36 48. 86 E. | 109 Herculis -..---- 11 41 01.98 |— 0.49 |4+ 0.07 |— 0.79 |11 41 00.77 |18 18 19.25 |4+6 37 18.48 E.| xz Draconis..-.---. 46 04.52 |4+ 3.77 |+ 0.30 |— 2.46 46 06.13 23 24.72 18.59 BiaWan Gyreyos ccc: 55 23.12 |-+ 0.12 |+ 0.21 | 0.94 55 22.51 32 40.51 18. 00 E. | 110 Herculis . ..---- 12 02 56.42 | 0 52 |+ 0.17 |— 0.78 /12 02 55.29 40 13.91 18, 62 E.|o Draconis ...--. 12 03.74 |+ 1.46 |4+ 0.29 |— 1.43 12 04.06 49 22.22 18. 16 Wri Aquiliecs S=--2 22 17.69 |— 0.72 |+ 0.30 |4+ 0.75 22 18. 02 59 36.35 18. 33 W.|0d #£Draconis. ---. 35 11.55 |4+ 2.56 |— 0.07 |4+ 1.91 35 15.95 |19 12 34.43 18, 48 W.|7z #£Draconis...-.--- 40 38.17 |4+ 3.91 |— 0.18 |4+ 2.52 40 44, 42 18 02.81 18. 39 W.| 8 Cygni.-.---.-..-.-. 48 19.24 |— 0.29 |— 0.12 | 0.83 48 19. 66 25 38.02 18. 36 We|@) G@ypni---.~---—- 12 55 44.35 |+ 0.71 |— 0.18 |+ 1.14 |12 55 46.02 |19 33 04.36 |4+6 37 18.34 NORMAL EQUATIONS. First series. 0O=—-+ 09.226 + 6.86 dt— 3.34c—1.01a! ot = — 08.008 ATo=-+ 64 36™ 492.00 0= + 03,009 — 3.34 dt + 17.00 cl + 2.72 a} c! =— 08.062 o=— 02.88 0=— 15.024— 1.01 dt4+ 2.72€0+43.18a a = + 03,372 a =— 18.860 Second series. 0 = — 05.8382 + 6.85 d¢+ 0.200—1.25a ot = + 08.116 ATo=-+ 6 37™ 193.25 0 = — 2°,666 + 0.20 dt + 17.89 4 + 0.46 a! aA=- 04.148 &=— 02,88 0 =-+ 02,099 —1.25dt-4 046¢-+4+3.51a a! =— 08.006 A = — 18,860 Clamp. | | 4444S hore nhareddad TIME DETERMINATIONS. 393 Observations and reductions for time taken at sending station—Continued. SANTA FE, NEW MEXICO, JULY 2, 1873. Name of star. ue Aa. Bb. Ce. i AR. AT hem. 8. be 8. 8. hom. 8. hom. 8. Tis (Tite) 82 On Boouiseeena== s- 8 29 42.25 |— 0.08 |4- 0.63 |— 0.86 | 8 29 41.94 |15 10 24.76 |+6 40 42. y Urse Minoris...) 40 14.10 |4+ 3.90 |+ 1.97 |— 2.35 40 17.62 21 00.53 42. a Coronspe- ae) eee 48 38.05 |— 0.33 |+ 0.90 |— 0.80 43 37.82 29 20. 43 42. Yau COLOn@ieeea= === 45. — 0.35 |— 0.82 |— 0.80 56 43,29 37 26. 42 43. 12 H. Draconis + 2.01 |— 1.96 |— 1.57 | 9 04 03.84 44 46.96 43. @ Draconis + 1,52 0.00 |4+ 1.38 18 50.58 59 33. 20 42, 6 Ophiuchi — 1.26 |— 0.03 |+ 0.72 27 00.30 |16 07 43.33 43. y Herculis --. — 0.59 |— 0.07 |+ 0.76 35 38.03 16 20.95 42. ny Draconis -. + 1.86 |— 0.16 |+ 1.51 41 36.33 22 19. 45 43. co Herculis + 0.33 |— 0.14 |4+ 0.97 | 9 49 19.84 30 02.72 |+6 40 42. 36 Draconis -.----- 11 31 57.09 |+ 2.34 |— 0.36 |4 1.82 |11 32 00.95 |18 13 13.05 |+6 41 12. 109 Hereulis -.-.-- 37 06.92 |— 0.55 |— 0.13 |4 0.85 37 07.09 18 19.25 12. a. Liyretss-2=-2-0 51 27.63 |+ 0.14 |— 0.05 |+ 1.01 51 28.73 32 40.52 ile 110 Hereculis -.----. 59 01.52 |— 0.59 |— 0.02 |4 0.84 59 01.75 40 13.92 12. o Draconis)--2---- 12 08 09.92 |+ 1.65 |+ 0.53 |— 1.54 |12 08 10.56 49 22.22 11. v’ Draconis'--2---- 14 45.52 |+ 3.78 |+ 1.01 |— 2.44 14 47,87 56 00, 47 iy. &-_ Aquilress2=ss-522 18 25.46 |— 0.81 |+ 0.42 |— 0.81 18 24.26 59 36. 37 12. a Aquilze=-------- 30 42.50 |— 0.89 |+ 0.52 |— 0.81 30 41.32 |19 11 53.35 12, 6 Aquile.....-..- 12 37 57.11 |— 1.14 |+ 0.53 |— 0.79 |12 37 55.71 |19 19 07.77 |+6 41 12. 3 NORMAL EQUATIONS. First series. 0=-+ 08,857 + 7.44 dt — 0.46 c! — 0.88 a} dt = — 68.094 ATo=-+ 65 40™ 43.00 0 = — 08.251 — 0.46 dt + 17.27 § —1.21 a! c! = + 08.056 o=— 08.77 0 =— 08.458 — 0.88 dt — 1.21¢'+2.94a! ai = - 08,149 A = — 29.143 Second series. 0=— 03.299 -+7.11dt4+ 0.81¢+0.35 a ot =-+ 05.046 ATo =-+ 65 41™ 125.00 0 = + 07.225 + 0.81 dt + 14.00 c! — 0.41 al cl = — 03,020 =— 08.77 == — 05.109 + 0.35 dt — 0.41 c+ 2.54 a! ai = + 08.034 A = — 28.143 82 03 06 354 ASTRONOMY. Observations and reductions for time taken at sending station—Continued. SANTA FE, NEW MEXICO, JULY 12, 1873. Qi E Name of star. Te Aa. Bb. Ce. ive AR. Ae a Ss iB ae 3 8. Ran, 3: Rema he m.. 13. W.| y Ursx Minoris..-| 8 01 10.34 |— 0.42 [4 0.61 |+ 1.33 | 8 01 11.86 |15 20 59.97 |4-7 19 48.11 W.| a Corone --...---- 09 31.57 |+ 0.04 |4+ 0.26 + 0.46 09 31.33 29 20.33 48. 00 W.| y Corone -.......-. 17 37.55 |+ 0.04 |+ 0.26 |+ 0.45 17 38.30 37 26.33 48.03 W.|« Serpentis .----. 23 14.87 |+ 0.07 | 0.23 + 0.43 23 15. 60 43 03.10 47.50 W.|y Serpentis -..---- 30 48.52 |+ 0.08 |+ 0.23 |+ 0.42 30 49.25 50 37.00 47.75 W.|@ Draconis -.----- 39 44.16 — 0.16 |+ 0.41 |+ 0.78 39 45.19 59 32.95 47.76 E. |e Ophiuchi-.----. 51 50.24 |+ 0,12 |4 0.03 |\— 0.41 51 49.98 |16 11 37.97 47.99 E.| y Herenlis -.----. 56 33.19 |+ 0.06 |+ 0.03 — 0.43 56 32.85 16 20.89 48. 04 E. | 7 Draconis -.----- 9 02 32.25 — 0.20 |+ 0.06 |— 0.86 | 9 02 31.25 22 19.20 47.95 E.|o Herculis -.----- 9 10 15.58 |— 0.04 |4+ 0.04 |— 0.55 | 9 10 15.03 |16 30 02.61 |4+7 19 47.58 E.| 6 Ursx Minoris.../10 53 23.27 |— 2.53 |4 2.79 |— 6.16 |10 53 17.37 |18 13 34.12 |47 20 16.75 E. | 109 Herculis -.----. 58 07.12 |+ 0.05 |4 0.28 — 0.39 58 07.06 18 19.29 12. 23 E. | x Draconis -.----- 11 03 13.21 |\— 0.39 |4+ 0.71 |— 1.22 |11 03 12.31 23 24.54 12. 23 lta Ways — == 12 28.40 — 0.01 |4+ 0.33 |— 0.47 12 28.25 32 40.55 12. 30 W.| 110 Herculis ------- 20 01.17 |+ 0.05 |— 0.21 |+ 0.39 20 01.40 40 13.99 12.59 We|'8 byrz=--- ------ 25 12.92 |+ 0.01 |— 0.25 |4 0.44 2oulon ke 45 25.60 12. 48 W.|o Draconis -.----- 29 09.61 |— 0.15 |— 0.37 |4 0.71 29 09.80 49 22.11 12. 31 W.|¢ Aquilw......-.-| 39 23.67 + 0.07 |— 0.20 |+ 0.38 39 23. 92 59 36. 46 12.54 W.| 25 Gamelop., H.sq-| 43 54.82 |+ 1.33 |} 0.76 |— 2.85 43 54.06 |19 04 07.51 13. 45 W.| 6 Draconis -..-.-- 11 52 21.77 — 0.26 |— 0.46 [+ 0.95 |11 52.22.00 |19 12 34.45 |47 20 12.45 NORMAL EQUATIONS. First series. 0 = -+ 05.227 4.7.32 dt— 1.09¢ +. 0.03 a! ét =— 05.031 AT) =-+ 75 19™ 472.90 0 = — 02.234 — 1.09 dt + 15.03 cl -++ 1.54 a! cl = + 02.005 —— 05.410 0 = — 02.230 +. 0.03 dt-+ 1.54 c+. 2.65 a! a —-+ 05,084 ihe 08.131 Second series. 0 -=— 08.306 +5.85d AT— 1.95 de—0.51 da da = + 05.070 AT =-+ 75 20™ 125.35 0 =— 08.631 — 1.95 d AT + 16.87 de + 0.33 da dc = + 08.045 o=— 08.41 0 = — 08.307 —0.51d AT + 0.33 de + 4.70 da d AT=-+ 08073 a —=-+ 08.123 Weight of a= 4.65 Weight of c= 16.17 Weight of AT= 5.57 | Clamp. Habeas saaaeaeeen TIME DETERMINATIONS. Observations and reductions for time taken at sending station—Continued. SANTA FE, NEW MEXICO, JULY 14, 1873. Name of star. Te Aa. Bb. Ce. Lt, AR. AT. Reiman ds 8. 8. 8. 1A SA (Oahicte. ch Tisctltas 8: 110 Herculis .......|11 12 02.68 |— 0.62 |+ 0.16 — 0.49 |11 12 01.73 |18 40 14.00 |+7 28 12.27 o Draconis....... 21 08.88 |+ 1.72 |+ 1.27 |— 0.90 21 09. 97 49 22.23 12. 26 G Aguile: -2----. 31 25.02 |— 0.85 |4+ 0.15 j— 0.47 31 23.85 59 36.48 12. 63 6 Draconis. ...... 44 19.04 |+ 3.02 |— 0.89 ‘+ 1.20 44 22.37 |19 12 34.44 12. 07 6 Aquilwes.22.:.- 50 56.65 |— 1.19 |— 0.34 |+ 0.46 50 55.58 19 07.90 12, 32 Be Cygne. -5-- 57 25.4", |— 0.35 |+ 0.05 + 0.52 57 25.70 25 38. 20 12. 50 Go Draconisie------ 12 04 21.95 |+ 3.419 |-+ 0.10 + 1.31 |12 04 26.85 32 39. 40 12. 55 ye Aquilipt esses. 12 03.75 |— 0.96 |+ 0.04 + 0.47 12 03.30 40 15.48 12.18 @ Aquilm2?-=-...<. 16 25.81 |— 1.02 |+ 0.04 |+ 0.47 16 25. 30 44 37.40 12. 10 en Draconise seo" 20 21.16 |+ 3.62 |4+ 0.10 |+ 1.35 20 26. 23 48 38.94 ipyval Groombr. 2984 -. 24 38.50 |+ 0.22 |+ 0.06 |+ 0.60 24 39.38 52 51.31 11. 93 28= Cyoniees. -so-=- 36 33.42 |+ 0.04 |4+ 0.19 |— 0.57 36 33.08 20 04 44.90 11. 82 Oli Cy onisneeeee ee 41 28.21 |+ 0.59 |4+ 0.22 |— 0.67 41 28.35 09 40. 21 11. 86 x. ‘Cepheizs.22.5-: 44 53.84 |+ 6.67 |+ 0.52 |— 2.10 44 58.93 13 11.89 12. 96 39)) Cyenieeeses- =e. 50 37.52 |— 0.18 |+ 0.18 |— 0.55 50 36.97 18 49.44 12. 47 e Delphini-...---- 12 58 59.41 |— 0.94 |4 0,14 |— 0.47 |12 58 58.14 |20 27 10.81 |+7 28 12. 67 NORMAL EQUATIONS. = — 08.028 + 11.53dAT— 0.52 de-+ 0.11 da dAT=-+ 05,005 ATo=-+ 72 28™ 128.28 0 = -+ 08.822 — 0.52 dAT + 24.00 de + 1.44 da dc = — 03.044 e—— O=:—08.444-+4+ O0.11dAT-+ 1.44dce-+ 4.46 da da = + 05.120 a + — 03.417 28.321 Weight of AT = 11.52 Weight of c= 23.51 Weight of a = 4.37 356 ASTRONOMY. Observations and reductions for time taken at sending station—Continued. SANTA FE, NEW MEXICO, JULY 17, 1873. => = Name of star. Te Aa. Bb. Ce. Te. AR. AT. S RAM: es: 8. 3. ae hm 8. RhesIRs. 8: hom as: W.|e Ophbiuchi 8 32 10.26 |+ 0.18 |+ 0.14 |+ 0.41 | 8 32 10.99 16 11 37.93 [47 39 26.94 - W.| y Herculis -- 3 36 53.92 |-+ 0.10 |4+ 0.19 |+ 0.43 36 54. 64 16 20.85 26.21 W.|7 Draconis 42 51.95 |— 0.30 |+ 0.35 4 0.86 42 52.86 22 19.06 26. 20 E. | Herculis 57 05. 67 |+ 0.03 |+ 0.38 — 0.48 57 05.60 36 31.86 26, 26 E. | «x Ophbinehi- -2--—-2 9 12 15.04 |+ 0.14 |4+ 0.29 |— 0.41 | 9 12 15.06 51 41.29 26. 23 E. |e Urse Minoris.-..| 9 19 44.98 |— 1.72 |4+ 1.65 |— 2.97 | 9 19 41.94 \16 59 10.05 |47 39 28.11 E. Groombr. 2533 ../10 31 59.68 |— 0.01 |+ 0.08 |— 0.83 |10 31 58.92 |18 11 43.95 |47 39 45.03 E. | 109 Hereulis -..---. 38 34.14 |4+ 0.02 |4+ 0.06 |— 0.66 38 33.56 18 19.29 45.7 EB. /% _Draconis:- .----: 43 40.43 |— 0.13 |4+ 0.16 |— 2.08 43 33.38 23 24.38 46. 00 ide [ze SLED c= s-eseest 52 55. 87 0.00 |+ 0.07 |— 0.79 52 55.15 32 40.55 45. 46 INR) piliyrD esse so ome 11 05 40.79 0.00 |+ 0.07 |— 0.74 |11 05 40.12 45 25.61 45. 49 E.|o Draconis:.------ 09 38.07 \— 0.05 |4+ 0.10 |— 1.21 09 36.91 49 22.18 45. 27 TOR gs UNTER Re en See 19 51.32 |+ 0.03 |-+ 0.06 |\— 0.63 19 50.78 59 36.49 45.71 W.| 46 Draconis -..---- 32 47.21 |— 0.09 |+ 0.07 |4+ 1.61 32 48.20 |19 12 34.41 45. 61 W.| 6 >- 7455 20 40 46 09 53.74 95 6355 18 32 88) 38 40 00.02] -, 7482 21 2519] 66 15 17.80 Bie ce ; £426 451021) 32540703598) sae an a ; 7522 32 10 5 11 59.58 26 6392 .18 40 24] 37 28 24.52 a 6468 50 13 33 48 27.32 *On July 26, B. A.C. 7132, A. R. 20" 32™ 238 declination 31° 04’ 50.44, was used instead of 7131. 362 ASTRONOMY. Observations and computations for latitude. SANTA FE, NEW MEXICO. Level. Corrections. = Microm. Halfsam of JoHJ_——— 2 Date. | No. of star. readings. Remarks. qeclination. NMieeork Latitude. N. Ss. aaa ae Level. 1873. & d. d. d ropiys “l / a“ e “ O° ‘ “o June 27 .. 5131 3.55.5 | 59.0) 14.5 155 4 93.9 | 11.0 | 63.0 | Set poor, | 35 36 41.49 | + 4 37.30 |— 2.04 | 35 41 16.75 5204 19 33.9 | 35.5 | 38.0 5295 6 39.3 | 39.0 | 35.0 37 01.23 | + 4 15.74 |+ 0.41 17. 38 5315 11 02.1 | 14.0 | 60.0 5341 14 18.5} 41.0 | 33.0 43 13.42 | — 1 41.83 |—10.35 21.24 5466 11 74.2 | 35.0 | 40.0 5503 16 00.4 | 21.5 | 54.0 43 44.10 | — 2 17.18 |—10. 22 16.70 5677 12 §9.3 | 57.5 | 19.0 5706 | 26 61.0 } 41.0 | 35.0 48 29.92 | — 7 21.48 |+12.13 20. 57 5765 12 24.2 | 21.0 | 55.0 5797 10 53.5 | 35.0 | 41.0 40 31.19 | + 0 54.94 |—10.90 15, 23 5828 10 29.0 | 62.0 | 13.0 ; 5871 9 57.6 | 40.0 | 35.0 40 40.14 | + 0 22.98 |414.72 17. 84 5918 | 12 24.0 | 54.0 | 21.0 5941 10) 93283] 255) }secos: 42 20.44 | — 0 41.90 |—10. 68 28. 46 6056 7 90.0 | 17.0 | 57.0 6116 8 83.4 | 63.0 | 11.0 40 32.92 | + 0 30.06 |4+ 3.27 6. 25 6147 10 56.0 | 23.0 | 51.0 6218 13 20.0 | 26.0 | 48.0 42 55.70 | — 1 24.96 |—13. 62 17.12 6355 8 16.4 | 44.5 | 29.0 6426 9 78.8 | 21.0 | 53.0 39 57.76 | + 1 24.45 |— 4.50 ilar | 6496 8 46.9 | 41.0 | 32.0 6528 11 99.7 | 17.0 | 57.0 39 36.94 | + 1 53.55 |— 8.46 22. 03 6566 15 06.2 | 40.0 | 33.0 6574 8 45.9 | 21.4 | 52.0 44 58. 06 a 3 32.52 |— 6.43 19.11 6589 |} 20 13.5 | 14.5 | 38.5 6659 4 14,5 | 39.0 |! 35.0 35 39.53 | + 5 53.71 |—10.90 22. 34 6678 8 11.2 | 35.3 | 39.3 6697 13 59.5 | 40.0 | 34.0 44 17,84 | — 2 56.47 |+ 0.54 21.91 6740 11 66.2 | 35.0 | 3.0 6769 8 73.9 | 11.0 | 63.0 39 50.30 | + 1 34.08 |—15. 26 9.12 6794 10 31.3 | 28.0 | 45.0 6824 16 43.5 | 43.0 | 31.0 44 38.64 | — 3 17.04 |— 0.14 21.46 6851 9 69.1 | 35.0 | 38.0 6875 13 01.8 | 28.0 | 45.0 43 11.38 | — 1 47.08 — 5.45 18. 85 6933 4 43.6 | 22.5 | 50.5 6959 17 70.5 | 41.5 | 31.7 35 48 32. 44 | — 7 07.06 | — 4.96) 35 41 20. 42 J LATITUDE DETERMINATIONS. 363 Observations and computations—Continued. SANTA FE, NEW MEXICO. Level. Corrections. Microm, |————_—_ Half-sum of a Date. | No.of star. readings. Remarks. Menliaatioat anes Latitude. N. 8. and refr. Level. 1873. te d. d. d. re} 1 a“ ‘ a“ “ oO ‘ “ June 27 .. 6998 | 26 77.2 | 23.0 | 50.0 7006 1313.7 | 38.5 | 34.5 35 39 30.79 | + 1 57.00 |— 6.27 | 35 40 21.52 7131 14 77.2 | 34.0 | 39.0 7158 7 63.3 | 165 | 57.7 37 44.10 | + 3 49.77 |—12. 68 41 21.19. 7174 16 26.3 | 41.5 | 32.7 7194 Hey fre) ||) 0) eee See 45 29.70 | — 3 56.66 |—15.10 17.94 June 28 .. 5131 27 95.4 | 33.5 | 11.5 5155 19 52.8 | 22.5 | 23.3 30 41.68 | + 4 31.19 |4 5.72 18.59 5210 | 20 33.2 | 20.0 | 29.0 5234 | 24 64.5 | 35.2] 14.8 38 57.62 | + 2 18,82 J+ 3.11 19. 55 5284 | 26 73.1 2.6 | 48.4 5313 UG Sis UY BAO eae 30 36.61 | + 5 33.76 J+ 4,81 15.18 5367 | 33 95.8 | 41.0 | 11.0 Gr. 2325 9 69.5 } 20.5 | 33.0 28 14.14 | +13 00.91 |+ 4,77 19. 82 5466 16 15.7 | 35.0 | 17.0 5503 | 20 76.1 | 16.5 | 34.5 43 44.30 | — 2 28.18 |— 0.00 16.12 55380 13 18.5 | 35.3 | 14.3 5996 | 28 54.1 | 23.7 | 17.5 49 25.96 | — 8 14.23 |+ 8.77 20. 50 5629 13 78.9 | 11.0 | 35.2 5674 | 23 54.2 | 46.0] 0.0 33 21.62 | + 7.54.82 |4 5.94 22. 38 5765 | 21 94.0 | 34.2 | 14.2 5797 20 55.3 | 18.4 | 31.6 40 31.42 | + 0 44.64 |4+ 1.84 17.90 Gr. 2431 | 25 83.8 | 17.0 | 35.0 5863 14 72.0 | 35.5 | 17.0 17 12.95 | + 5 57.83 |4 0.14 15. 26 5918 | 23 60.0 | 21.0] 31.0 5941 21 58.0 | 35.0 | 18,0 42 20.66 | — 1 05.01 |+ 1.91 17.56 6056: ]) 22°30.'5 || 2355 || 31-3 6116 | 23 87.5 | 21.0 | 35.0 40 33.18 | + 0 50.53 |— 5.94 dete a 6134 | 23 65.0 | 21.0 | 34.0 Gr. 2536 | 20 58.6 | 43.0 | 14.0 34 39,24 | + 1 38.61 |4 4.36 22. 21 6231 16 56.0 | 23.5 | 33.0 6252 | 27 47.8] 37.0] 19.5 47 08.43 | — 5 51.40 |4 2.18 19, 21 Arg. LXIII} 24 23.5 | 23.5 | 33.5 6364 18 61.3 | 24.0 | 33.5 38 20.80 | + 3 00.95 |— 5.31 16. 44 6392 17 20.1 |} 30.0 | 27.0 6468 |} 32 02.0 | 62.0 |...--. 38 21.72 | + 2 35.10 |4-19. 68 15. 90 6496 | 22 41.5 | 46.0] 11.5 | 6528 | 25 35.3 | 22.5 | 35.0 35 39 37.22 | + 1 34.56 ]+ 6.00 | 35 41 17.78 364 ASTRONOMY. Observations and computations—Continued. SANTA FE, NEW MEXICO. Level. Corrections. Microm. - __ || Halt-som of | = . Date. | No. of star. readings. Remarks. Aealiniae oe Latitude. N. 8. anu Level. 1873. as ad. d. d. io tr “ 4 4 u (im Ul “ June 28 .-! 6566 | 26 23.4 | 21.5 | 35.0 6574 19 37.6 | 35.0 | 21.5 35 4458.35 | — 3 40.73 |— 0.00 | 35 41 17.62 6589 | 22 70.7 | 21.0 | 37.0 6659 1293353) || Avaoilh (O20 35 39.82 | + 5 33.89 |+ 5.94 19. 65 6695 | 13 95.9 | 11.8 | 25.6 6723 | 27 80.0-)52.0} 5.0 48 41.52 | — 7 25.47 |+ 3.60 19. 65 6762 11 64.7 | 31.0 | 26.5 6779 | 27 08.6 | 34.0 | 23.0 49 32.66 | — 8 16.91 |4 4.23 19. 98 6800 12 38.0 | 33.7 | 23.0 6813 | 20 15.7 | 21.5 | 35.0 45 26,24 | — 4 10.30 |— 0,49 15. 45 6835 | 25 95.0] 2.5 | 54.0 Gr. 2977 14 80.1 | 21.4 |} 35.0 35 41.58 | + 5 58.83 |—17.74 22. 67 July 4.... 5131 26 06.0 | 29.0 | 33.0 5155 17 41.5 | 36.5 | 30.5 36 42.68 | + 4 38.24 |4 0,54 21. 46 5210 | 20 30.9 | 37.2 | 29.2 : 5234 | 24 77.5 | 26.2 | 40.6 38 58.66 | + 2 23.74 |— 1.74 20. 66 5284 | 27 13.6 | 29.7 | 37.3 5313 16 45.2 | 34.0 | 34.0 35 37.38 | + 5 43.86 |— 2.07 19ST 5367 | 29 91.1 | 35.0 | 34.0 Gr. 2325 5 54.1 | 30.0 | 35.0 28 15.22 | +13 04.35 |4+ 0.27 19. 84 5466 | 25 56.0 | 62.0] 8.0 5503 19 88.9] 6.5 | 63.5 43 45.50 | — 2 30.40 |— 0.82 14, 28 5604 | 28 39.6 | 35.0 | 33.0 5617 7 23.5 || 30.0 || do. 0. 29 59.96 | +11 21.06 |4+ 0.14 21.16 5765 21 77.0 | 30.5 | 39.2 5797 20 25.2 | 41.2 | 29.0 40 32.78 | + 0 48.86 |+ 0.87 22. 51 Gr. 2431 26 16.5 | 35.2 | 35.8 5863 15 21.5 | 35.5 | 35.5 47 14.43 | — 5 52.43 |— 0.17 21.83 5883 | 18 83.2 | 41.0 | 30.2 5911 22 80.2 | 36.0 | 35.0 43 25,20 | — 2 07.77 |4+ 3.22 20. 65 5997 | 22 95.9 | 30.2 | 40.5 6021 25 52.3 | 48.0 | 22.5 39 53.18 | + 1 22.52 |+ 4.14 19. 84 6056 19 73.7 | 35.0 | 35.5 6116 21 21.0 | 41.0 | 30.0 40 34.76 | + 0 47.41 |+ 2.86 25. 03 6134 23 38.0 | 22.0 | 48.5 Gr. 2536 19 90.2 | 36.0 | 35.0 39 40.92 | + 1 51.94 |— 6.95 25. 91 6231 | 13 73.0 | 36.0 | 36.0 ; 6252 24 97.8 ! 45.0 | 27.0 35 47 10.05 | — 6 02.01 4+ 4.90 | 35 41 12.95 LATITUDE DETERMINATIONS. 365 Observations and computations—Continued. SANTA FE, NEW MEXICO. Level. Corrections. f Microm. |——_—— __ | Half-sum of Date. | No. of star. readings. Remarks. Aaclinntion: 54 Latitude. N. | 8. eee | evel: and refr. 1873. tds d. d. of a U “ a“ of “ July 23... 5828 | 20 61.3 | 26.2 | 34.5 5871 | 19 78.9 | 45.0] 15.8 35 40 45.87 | + 0 26.52 |4+ 5.69 | 35 41 18.08 5918 | 22 00.2) 52.0] 9.7 5941 | 19 72.0 | 22.0} 40.0 42 26.00 | — 1 13.45 |+ 6.62 19.17 5997 | 17 55.0 | 33.5 | 28.5 6021 | 19 85.9 | 35.2 | 27.5 39 57.60 | + 1 14.32 |+ 3.46 15. 38 6056 | 19 77.5 | 34.5 | 29.0 6116 | 20 90.0 | 35.2 | 27.7 40 39.27 | + 0 36.20 |+ 3.54 19. 01 6392 | 18 55.5 | 27.8 | 35.2 6468 | 23 45.5 | 56.0] 6.5 38 28.68 | + 2 37.71 |+11. 47 17. 86 6496 | 17 99.6 | 34.5 | 238.5 6528 | 20 73.2 | 35.5 | 27.3 39 43.98 | + 1 28.06 |+ 2.23 14, 27 6566 | 23 52.5 | 28.3 | 35.1 6574 | 16 20.6 | 48.7 | 13.38 45 05.31 | — 3 55.56 |+ 7.66 17.41 6589 | 22 12.0] 18.7 | 44.0 6659 | 11 90.8 | 52.5 | 10.8 35 46.88 | + 5 28.68 |+ 4.47 20. 03 July 26... 6566 | 25 45.8] 9.0 | 35.0 d 6574 | 18 84.5 | 23.0 | 21.5 45 06.12 | — 3 32.84 |— 6.68 26. 60 6589 | 21 35.5 | 21.0 | 24.0 6659 | 11 09.0 | 34.0 | 11.0 35 47.66 | + 5 30.38 |4 5.45 23. 49 6678 | 17 32.0 | 13.5 | 32.0 6697 | 22 94.8 | 25.3 } 20.0 44 26.07 | — 3 01.14 |— 3.60 21. 33 6740 | 18 55.0 | 35.0 | 10.7 6769 | 15 84.2] 10.5 | 35.5 39 58.85 | + 1 27.16 |— 0.19 25. 82 6794 | 18 00.8 | 20.5 | 25.0 6824 | 24 15.0] 10.5 | 35.0 44 46.88 | — 3 17.68 |— 7.90 21. 30 6881 | 22 47.2 | 12.4 | 33.6 6901 | 19 60.6 | 35.3 | 11.0 40 09.08 | + 1 08.68 |+ 0.84 18. 60 6933 | 1211.8 | 47.2] 1.0 6959 | 26 04.0 | 14.2 | 32.0 48 40.95 | — 7 28.08 |4+ 8.28 21.15 7084 | 19 84.8] 11.5} 35.0 7103 | 22 54.6] 45.5] 1.0 39 49.03 | + 1 26.83 |4 5.72 21.58 7131 | 15 30.9 | 23.0 | 23.0 7158 5 89.2 | 14.0 | 33.0 36 24,24 | + 5 03,09 |— 5.19 22.14 7174 23 65.3 | 36.5 | 10.0 7194 | 15 50.0 | 10.0 | 37.0 45 37.82 | — 4 22.41 |— 0.14 15, 27 7241 | 13 63.2] 14.5 | 32.0 7256 | 26 15.41 17.01 30.0 35 34 44,82 | + 6 43.02 |[— 8.31 | 35 41 19.53 366 ASTRONOMY. Observations and computations—Continued. SANTA FE, NEW MEXICO. Level. Date No. of star, Microm. ? i ‘| readings. N. S. 1873. ie Gh d. d. July 27... 5€28 | 19 17.4 | 17.0 | 45.0 5871 | 18 20.5 | 48.0 | 13.0 5883 | 17 22.5 | 34.0 | 27.0 5911 | 21 38.0 | 37.0 | 23.0 6134 | 24 38.5 | 35.0 | 26.0 Gr. 2536 | 21 63:0 | 34.0 | 27.0 6355 | 15 29.0 | 37.5 | 23.5 6426 | 17 68.5] 17.0 | 44.0 6496 | 17 72.9 | 48.0 | 13.5 6528 | 20 67.4 | 13.0 | 48.0 6589 | 20 22.5 | 35.0 | 26.0 6659 9 77.1 | 26.0 | 35.5 6794 | 16 39.8 } 23.5 | 39.0 6824 | 22 91.2 | 37.0 | 26.0 July 28... 5520 | 24 81.5] 19.0 | 47.5 5545 | 21 01.0} 50.5 | 16.5 5604 29 97.2 | 32.0 | 35.0 5617 9 10.6 | 40.0 | 26.5 5677 | 12 96.4 | 34.0 | 33.0 5706 | 26 74.0 | 37.0 | 11.0 5828 | 18 80.8 | 34.0 | 35.0 5871 | 17 97.3 | 46.0 | 22.5 5883 | 17 37.0 | 44.0 | 24.0 5911 | 21 83.0 | 48.0 | 19.0 5997 | 18 76.8 | 38.0 | 30.0 6021 | 21 14.0 | 35.0 | 34.0 6056 | 19 50.0 | 62.0] 7.0 6116 20 47.5 | 17.5 | 52.0 6134 23 51.0 | 35.5 | 34.0 | Gr. 2536 | 20 52.0 | 18.0 | 52.0 6231 | 14 21.6 | 36.0 | 34.0 | 6252 | 25 13.0] 12.5 | 56.5 | 6302 | 24 98.5 | 34.0 | 34.0 6307 13 09.5 | 35.0 | 34.0 Arg. LXIII} 19 05.4 | 31.0 | 37.5 H 6364 | 13 69.0 | 39.0.| 29.0 } 6566 | 24 93.0] 31.5 | 35.5 6574 17 86.0 | 35.0 | 32.0 Remarks. Half-sum of declination. fo) a 35 40 46.70 43 30. 07 35 47.90 44 47.17 39 15. 06 30 04, 44 48 36. 02 40 46.90 43 30.28 39 58. 48 40 40. 30 39 47.18 47 16.00 47 36.74 38 28.80 Corrections. Microm. and refr. i a“ + 0 31.19 — 2 13.73 + 1 28.67 + 1 17.08 + 1 34.79 + 5 36.46 — 3 29.65 + 2 02.46 +11 11.57 — 7 23.38 + 0 26.88 — 2 23.54 + 1 16.35 + 0 31.38 + 1 36.24 Level. al + 1.91 + 5.72 + 4.36 eon — 0.00 — 0.14 = ioe + 1.50 + 2.86 +12. 81 + 6.13 +113. 35 + 2.45 + 2.86 — 8.86 —11. 44 + 0.27 + 0.95 — 0.27 Latitude Cy 7 “ 35 41 19.80 22. 06 19. 97 19. 49 19, 54 24, 22 16, 29 19, 02 35 41 18.79 LATITUDE DETERMINATIONS. 367 Observations and computations—Continued. SANTA FE, NEW MEXICO. Level. Corrections. : Number | Microm. |——~——— Half-sum of }—_———_— : Date. of star. | readings. Remarks, 4 eclination. Wire Latitude. N. 8. and refr. Level. 1873. tas d. d. Of i) a a Ort u July 29... 5466 13 20.6 | 27.0 | 46.0 5503 | 17 97.2 | 52.0 | 21.5 35 43 49,42 | — 2 33.39 |+ 3.13 | 35 41 19.16 6520 | 22 41.5 | 23.0 | 50.0 5545 | 18 60.0 | 51.0 | 22.5 39 15.16 | + 2 02.79 |+ 0.41 18. 36 Arg. LXIIT| 22 56.3 | 28.0 | 40.0 6364 | 17 19.3 | 40.5 | 27.5 38 29.07 | + 2 52.83 |— 0.14 22.04 6566 23 56.0 | 24.0 | 44.0 6574 | 16 52.5 | 35.0 | 33.0 45 06.85 | — 3 46.42 |— 4.90 15. 53 6589 | 24 16.5 | 32.0 | 36.0 6659 | 14 15.1 | 45.0 | 23.0 35 48.38 | + 5 22.30 |+ 4.90 15. 58 6678 | 16 84.2 | 32.0 | 36.0 6697 | 22 73.8 | 42.0 | 26.5 44 26.80 | — 3 09.76 |4+ 3.13 20.17 R.C. 4379 | 18 45.0 | 45.0 | 23.5 6749 | 16 60.6 | 18.0 | 51.0 42 23.17 | — 0 59.35 |— 3.13 20. 69 6762 7 67.0 | 53.0 | 16.0 6779 | 23 40.9 | 25.0 | 45.0 49 41.80 | — 8 26.56 |4 4.63 19. 87 6794 16 59.0 | 44.5 | 25.5 6824 | 23 17.5 | 35.0 | 35.0 44 47.76 | — 3 31.94 |+ 5.18 21.00 6881 17 91.5 | 36.5 | 35.0 6901 19 93.0 | 43.0 | 29.0 40 09.88 | + 1 04.85 |-+ 4.23 18. 96 6933 10 61.5 | 36.0 | 37.0 6959 | 24 30.6 | 28.0 | 44.5 48 41.84 | — 7 20.64 |— 4.77 16. 43 6975 | 28 45.4 | 35.0 | 37.0 6985 | 10 45.0 | 37.0 | 35.5 31 37.93 | + 9 39.59 |— 0.14 17.38 7022 | 28 97.4 | 38.0 | 34.0 7029 | 14 64.8 | 33.0 | 39.0 49 01.89 | — 7 41.08 |— 0.54 20. 27 7084 MEySyeard [EEO || Bas) 7103 | 18 24.4 | 35.0 | 36.5 39 49.92 | + 1 32.28 |— 4.09 18, 11 7131 19 72.3 | 23.5 | 48.5 7158) |) 13) 4229" 53; 071950 37 53.80 | + 3 22.83 |+ 2.45 19. 08 7174 | 21 67.0 | 36.5 | 35.5 7194 13 62.1 | 35.5 | 37.0 45 38.92 | — 4 19.06 |— 0.27 19. 59 7275 7 04.0 | 21.5 | 51.0 7294 | 30 96.0 | 47.2 | 25.0 54 12.75 | —12 49.86 — 1.99 20. 90 July 30... 5520 | 21 12.5 | 18.5 | 59.5 5545 | 17 04.0 | 43.0 | 35.0 39 15.27 | + 2 13.40 — 8.99 19. 68 5604 28 31.6 | 35.0 | 44.0 5617 7 27.6 1 36.0 | 43.5 35 30 04.80 | +11 17.17 |— 4.50 1 25 41 17.47 368 ASTRONOMY. Observations and computations——Continued. SANTA FE, NEW MEXICO. Level. Corrections. ii, — == Half-sum of z Date. |No. of star. readings. Remarks. Aeclinatione ne Latitude. N. Ss icrom. andrefr. | Level. 1873. fee d. d. oe ate tS ee wy ON eee July 30... 5677 | 11 01.7 | 35.5 | 44.0 5706 | 19 74.0 | 50.0 | 29.0 35 48 36.30 | — 7 21.67 |+ 3.41 | 35 41 18.04 5828 | 17 40.0 | 35.5 | 22.0 5871 | 16 39.1 | 32.5 | 35.0 40 47.20 | + 0 32.47 |4 0.27 19, 94 5918 | 18 54.7 | 38.0 | 29.0 5941 | 16 61.8 | 29.0 | 48.0 42 27.20 | — 1 02.08 |— 5.18 19. 94 5997 | 21 15.6 | 33.0 | 35.0 6021 | 18 62.2] 35.0 | 33.0 39 58.98 | + 1 21.55 0. 00 20. 53 6056 | 19 00.8 | 52.5 | 14.5 6116 | 19 95.0 | 29.5 | 39.0 40 40.70 | + 0 30.32 |+ 7.77 18.79 6147 | 21 57.0 | 35.0 | 33.0 6218 | 19 70.8 | 33.0 | 35.0 35 43 04.30 | — 1 40.99 |— 0.00 | 35 41 23.31 Nore.—The following observations were rejected : June 27, pairs 17, 19, 33; deviations, + 9”.0, — 13’.2, — 10'3. July 4, pair 22; deviation, — 6.5. July 26, pairs 28, 33; deviations, + 7’.2, + 6".4. July 28, pair 22; deviation, —6”.2. The limit of rejection was set at 6’.0. A preliminary discussion with reference to a correction of one revo- lution of the micrometer-screw showed that it was insensible for this sta- tion; and also that pairs observed m times would give probable errors essentially equal by making the weight of the mean of the » observa- tions = $+ 3 LATITUDE DETERMINATIONS. ' 369 Results for latitude. us | ° 2B Soa 38 38 é s aS 43 atit : aS : Latitude & 5 3 Latitude 3 2 + E gel eis as| 2 S eB} = a Z Sola Fine oO i a“ (e} t “ 1 35 41 18.93 oe le 25 | 35 41 18.60 | 2 1.5 2 17. 38 i | 26 16.68}. 2] 1.5 3 20. 10 2 1.5 2 18. 40 | 4 2.5 4 17.18 2 1.5 238 17. 67 Eyl} 3 5 21,24 1 1 29 20. 88 GillProao 6 19. 83 2 1.5 50 21.14 ai) 7 16. 56 (VA AAG) 31 19. 65 1 1 8 19, 02 3| 2 32 20, 69 qi 1 9 20.50 i 1 Ot eee ortorasa ca lence aecarc 10 19.17 a 34 19. 92 2) 1.5 11 22.33 i) 1 35 20. 01 4) 2.5 12 PAI 3 2 36 15, 45 1 il 13 18. 55 Bl] 2 37 22. 67 i) 1 14 18.55 2 1.5 38 18.85 1 1 15 19. 09 S|), 8 39 18.7 2 1.5 16 20. 93 Bi 2 40 19. 33 3} 2 17 19, 56 3 2 41 17. 38 1 1 18 18. 26 4 2.5 42 21.52 1 1 19 19. 03 Salle 43 20. 27 1 1 20 18.91 cule 44 19, 84 2 1.5 - 21 20. 22 PA |) aes 45 20. 80 Suis 22 19721 1 1 46 17. 60 site 2 23 14, 33 1 1 47 19. 53 1 1 24 35 41 20.29 3 || 2 48 | 35 41 20.90 1 1 Mean by weights— 35° 41’ 19’.29 (weight 79). Probable error (weight 1) = + 1.35. Probable error of final result, = + 0.152. I have omitted the trifling meridian correction. Without it the stars observed late give a somewhat larger latitude, indicating that the wire was slightly inclined. There were some stars observed before transit, so that both these very nearly counterbalance each other. ASTRONOMICAL CO-ORDINATES OF SANTA FE, NEW MEXICO. Longitude.. 7 03™ 478.015 or 105° 54/ 45/22 + 0.32 west from Greenwich. Longitude.. 1° 55™ 348.895 or 28° 53/ 437.42 west from U. S. Naval Observa- tory, Washington, D. C. Latitude ... 35° 41/ 19.29 + 0”.15 north. 24 AST U. S. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN, ist Lizut. GEO. M. WHEELER, Corrs oF ENGINEERS, U. 8. ARMY, IN CHARGE. RESULTS or OBSERVATIONS MADE BY JOHN H. CLARK AND DR. F. KAMPF IN THE DETERMINATION OF THE ASTRONOMICAL CO-ORDINATES OF BOZEMAN, MONTANA. SEASON OF 1873. COMPUTATIONS BY JOHN H. CLARK anv Dr. F. KAMPF. 371 ’ iy eh wt teste Ab ib ew TT eh ee BOZEMAN, MONTANA. GEOGRAPHICAL POSITION OF STATION. Longitude, . . 111° 02! 36.64 + 0.53 west from Greenwich. Latitude,. . . 45°40! 51.92 + 0.06 north. Barometric altitude of observatory above sea-level, 4838.6 feet. The station at Bozeman is situated on the western edge of the village, south of the principal east and west street. It may be easily found by means of the grave of Bozeman, the founder of the town, a well-known spot, which is about 100 feet southwest from the block of wood upon which the transit was mounted. For many miles northward, westward, and south- ward the country is gently rolling. In the east, not more than two miles away, are the foot-hills of the mountains, along whose base the eastern fork of the East Gallatin River pursues its way, upon which, three miles dis- tant, lies Fort Ellis. The East Gallatin, formed by the junction of this and the western branch, which traverses the eastern limits of Bozeman, continues its course through the Gallatin Valley in a direction generally northwest. Besides this river there are two other large streams in the Gallatin Valley, called the West Fork and Middle Fork, which contribute to the river of that name. These, of which the West Fork is the largest, carry at all times an abundance of pure water, which could be easily diverted for use in irrigation. In every direction are heavy masses of mountains, which inclose the beautiful and fertile Gallatin Valley and make it an amphitheatre of vast proportions. Its soil yields abundantly of those agri- cultural products that grow in this latitude, especially potatoes and wheat. Bozeman has a population of 400 or 500 people. In its private resi- dences, mills, and warehouses it is a place of considerable pretension. Much of this enterprise, previously displayed, was probably due to the 373 374 ASTRONOMY. anticipation of the introduction of the Northern Pacific Railroad, but at this time the town was laboring under the stagnation consequent upon the failure of this great corporation, and its business affairs were much depressed and its prospects were gloomy. There are no mineral deposits developed as yet in this immediate vicinity, and the settlement is dependent for its pros- perity upon the grazing of the surrounding mountains and valleys, the agricultural products of Gallatin Valley, and such trade as is furnished by Fort Ellis, the Crow agency, and the neighboring hunters and stock-raisers. METEOROLOGICAL CONDITIONS. The station at Bozeman was occupied from October 12 to November 5, inclusive, a period of twenty-five days. In all this time there were but nine days favorable for observations; they were October 17, 18, 19, 28, 29, 30, 81, and November 1 and 2. Even on these nights the extreme cold prevented any advantageous work after midnight, the fingers of the operator becoming so benumbed by that time that they would no longer obey his will in manipulating the instrument. Such rigorous weather at so early a season had never been experienced before by the oldest inhabitant. Though the days were very short, yet it would be pleasant and comfortable when it was sufficiently clear for the sun to shine. At night, however, the wind would sweep down from the snow-covered mountains, penetrate all ordinary clothing, and chill the stoutest frame. DESCRIPTION OF OBSERVATORY. The observatory was an ordinary wall-tent, which was drawn over a frame and furnished with the flaps and curtains necessary to exclude wind and dust. The observations were conducted by Mr. John H. Clark, who was assisted by Mr. L. P. Smith. An hourly meteorological record was kept by Messrs. O’Brien and Storer, soldiers of the Engineer Battalion. The telegraph-line with which transmission of signals was made is an inde- pendent branch line, the property of Mr. Largy, connecting at Helena with the Western Union. The operator was Mr. King. ASTRONOMICAL STATION—BOZEMAN, MONTANA. ate DESCRIPTION OF INSTRUMENTS. The transit employed was the Wiirdemann, No. 27, with a focal length of 28 inches, and aperture of object-glass 24 inches. It was mounted on a block of wood 2 feet across and 6 feet in length, which was firmly planted in the ground. The chronometer in use here was the Negus break-circuit, No. 1499, whose electro-magnetic capacity could not be tested, however, as the observations were made by the eye-and-ear method. The signals were sent and received at the telegraph-office, about a half-mile distant from the observatory, to which place the chronometer was removed for that purpose. CONNECTIONS.—OBSERVERS.—COMPUTERS. The connection was made over Largy’s line to Helena; thence, by way of Virginia City, over the Western Union, with the observatory at Ogden, at which station Dr. F. Kampf was observer. Exchanges were made for longitude on three days, the 29th and 31st of October and the Ist of No- vember being devoted to that purpose. The nights of October 17, 18, and 19, and November 2 and 4, were given to latitude-work; but, in conse- quence of interruption by the clouds, one of these series was without valu- able results. The computations were made in the office, in the course of the winter, by Mr. John H. Clark, and were subsequently reviewed by Dr. F. Kampf. INSTRUMENTAL VALUES.—TELEGRAPHIC COMMUNICATION. Each division of the striding-level had a value of 1’.03; each division of the zenith-telescope level was equivalent to 0'’.93; one revolution of the micrometer-screw produced an effect of 77.078. The signals were all interchanged by sound, and even by this method it was difficult to take them, in consequence of the very imperfect line through which the circuit ran. Its length, in an air-line, was over 300 miles. At Helena there was a heavy battery, and probably a repeater, but at Bozeman the telegraphic process was effected without the use of either. 376 Tabulation of stars ASTRONOMY. used for determination of time at Bozeman, Utah, 1873. Montana, and Ogden, BOZEMAN. OGDEN. BOZEMAN. OGDEN. o Ae is! : i : {4 2 Be ics! Name of star. Rianlsi/Rlx]e Name of star. RliS/s1S/S] 48 al =I 2 al al 2 m aI R I al Fe 2S eee be 2\ei/e/2/218 2 Se eal Cale Si/SiEISlsle j=) o ic) oS oS ie) oS o ic) So o oS SSO | 4 |S | © || 4 SS | 4 || 2 | © We a Andromede ...-.--- Sa64|| 36 |lscso|fessellocac||oaac 226 Cephei --.-..--=-- ssoc|b=callaase x a Quile-s22-.s2s--- Sarl ine del ee are pap EE G. “#Pepasi 2heccte- cee xe le Pa) | kee COphetnenreee eae 3 || 2S Isese]/oooa|[oso-||4-5- oe Cepheln nearer ealeeS leacelhe< | 2.4 |aeor 77 AC apnicormienca== el |e call petal | eee peeel meee A Aquaria eneeee sees (Peer | OC Seeolisee | cer es Delphiniessesseees 2) (ENC sca | ee | Pace |e @ IRGC JATE Es soscon oat os al >.< || etl aes ose Groombr. 3241--... x |] S€ || 8 |leccs|losoa||2500 o Andromede ..---- Pee es lesa’ [ipsa leaete|ps-< @ (CW iMeocases ascees B€ || 2X |) OS |hecoslleseellecoo|l]@ LEGER a 5565 See sop|ieacal| S< |) DS i) 2S || OX [BR AG GES o-ponesesee 3S |) eS |) e& Iecesllecaalissce $) -Aquaniices esse e|lse |S) fennel eens eee De (Mails ssccco-comeae | XEX |secelsacalbeee y JPiscium\es< |] @ Lee - So5 Sac4|le5 aa) OX || SS jlescollscesiloose Ge AXE So5S5c6 osce XS || 36 |[esea|s=se||s20¢|]225- G2 IPSN es eose cece San Ke) See |e Sslleoes | | | Observations and reductions for time taken at sending station—Continued. BOZEMAN, MONTANA, OCTOBER 29, 1873. I Name of star. in, Aa. Bb. Ce. ae AR. AT. 5 hom. 8. 8. 8. 8. lie dito Gh |b ih Se hm. 8. E. | « Cephei......--../18 13 01.78 |4-24. 90 0.00 |— 0.20 |18 13 26.47 |20 13 04.70 |4-1 59 38,23 Ki. | « Capricorni .-.... 20 36.84 |— 9.90 |+ 0.01 |— 0.05 20 26.90 20 04.91 38. 01 E| 2 Delphini ==> -4-- 27 37.96 |— 6.04 |+ 0.02 |— 0.04 27 31.90 27 10.20 38. 30 E. Groombr, 3241... 30 38,16 |+-15.11 |4+ 0.17 |— 0.15 30 53, 29 30 31.25 37.96 By Cu yo nie e ner ae 37.29.14 |— 0.21 |+ 0.10 |— 0.06 37 28.97 37 07.03 38. 06 ES) Aquarit\2242--- 46 20,67 |— 8.65 |+ 0.05 |— 0.05 46 12.02 45 50. 02 38..00 10S || Oh pate oecee ace- 52 50.25 |— 1.14 |4 0.11 |— 0.06 52 49.16 52 27.43 38, 27 Wel| 7) eAquariiy= 3-5 20 29 21.52 |— 7.55 |— 0.02 |4 0.04 20 29 13.99 |22 28 52.12 38. 13 Well Kee Ropasiie ose oes 39 37.90 |— 6.15 |— 0.04 |+ 0.05 35 31.76 35 09. 89 38. 13 Weep Cephere-seesee—s 45 25.00 |+ 8.55 |— 0.15 |+ 0.11 45 33.51 45 11.69 38.18 W.|@ Piscis Aus.......| 51 14.20 |—11.67 |— 0.02 |+ 0.05 51 02.56 50 40. 67 38. 11 W.| 4 Draconis, L. C-.-/20 24 40.66 |—27.50 |— 0.21 |— 0.18 |20 24 12.82 /22 23 51.01 |+-1 59 38.19 o— NORMAL EQUATIONS. 12.00 dt + 2.90 a+ 10.99 ¢ 2.90 dt + 19.52 10.99 dt— 5.93a-+-56.71¢ 5.93 ¢ Adopted a = — 108.300 a=— 05.117 Azimuth — 108.447 — 5,045 c TIME DETERMINATIONS. 317 Observations and reductions for time taken at sending station—Continued. BOZEMAN, MONTANA, OCTOBER, 31, 1873. a ! I Name of star. oT Aa. Bb. Ce. We AR. AT. S hom 8. 8. 8. 8. JENS opal |e tity ae te hems +8: E.| @ Aquile 17 44 46.37 |+ 3.98 |-- 0.06 |~ 0.19 |17 44 50.22 |19 44 36.48 |4-1 59 46.26 BE. |} « Cephei -_--...--- 18 13 34.14 |—15.59 |+ 0.31 |— 0.83 |18 13 18,03 )20 13 04, 48 46, 45 KE. | « Capricorni ......| 20 12.48 |+ 6.20 |+ 0.02 |— 0.19 20 18.51 20 04.84 46, 33 E. |e Delphini.-..-. --| 27 20.16 |4 3.79 |4 0.01 |— 0.19 27 23.77 27 10.17 46. 40 E. Groombr. 3241-...| 30 54.81 |— 9.47 °|+ 0.12 |— 0.60 30 44. 86 30 31.11 46, 25 Bi oe Cy ones noe 37 20.62 |+ 0.13 |4+ 0.07 |— 0.26 37 20.56 7 06.98 46, 42 EB. | 2 Aquarii -...----. 45 58.33 |4+ 5.42 |4+ 0.03 |— 0.19 45 03.59 44 49,99 46. 40 Bre yn (Cyo nie cee enn 52 40.40 |+ 0.74 |+ 0.09 |— 0.24 52 40. 99 52 27.39 46. 40 E. | 61 Cygni....!-...-- 19 01 26.45 |-+ 1.09 |-+ 0.10 |— 0.23 |19 O1 27.41 |21 01 13,86 46. 45 E.|¢ Cygni.......-.--| 07 45.09 |4+ 2.07 |+ 0.09 |— 0.21 07 47.04 7 33.29 46. 25 Wella ACen sear 20 29 01.02 |4+ 4.73 |— 0.03 |4 0.18 [20 29 05.90 28 52.10 46. 20 Wial|| Gs Begasiec seco. 35 19.34 |+ 3.85 |— 0.03 |-4+ 0.19 35 23535 35 09. 87 46. 52 W.i||¢ Cepheil----<- =. 45 30.28 |— 5.35 |— 0.07 |4 0.44 45 25.30 45 11.65 46. 35 W.| a Piscis Aus-...... 50 46.80 |-+ 7.34 |— 0.01 |4 0,21 50 54. 34 50 40, 64 46, 30 W.| ¢@ Aquarii ......... 21 07 55.43 |+ 5.21 |— 0.01 |+ 0.18 |21 07 00.81 |22 06 47.28 4G. 47 W.| y Piscium-........- 10 46.30 |+ 4.46 |— 0.01 |+ 0.18 10 50. 93 10 37.31 46, 38 We Piscium. .-..--=- 20 36.69 |-+ 4.63 |— 0.01 | 0.18 20 41.49 20 27.84 46. 35 W. | @ Piscium -.--- 52 59.31 |+ 4.18 0.00 |-+ 0.19 52 03. 68 51 50. 10 46, 42 Welles Piscium)s-eo-c2-. 56 12.17 |+ 4.04 |4 0.05 |4 0.18 56 16. 44 56 02.95 46.51 W.| a Andromede -...- 22 02 03.31 |+ 2.20 |+ 0.14 |4 0.21 [22 02 05.86 |23 01 52.19 |+1 59 46.33 NORMAL EQUATIONS. 0=— 1.56+ 20.00 dt+ 5.15a'+ 5.34¢ Adopted a = -+ 68.700 Azimuth = - 65.526 O=—1.15+ 5.15 dt + 15.56 a! — 16.29 ¢ a’ = — 08.174 c= — 08.183 0=+6.93-+ 5.34 dt— 16.29 al +- 58.49 ¢ BOZEMAN, MONTANA, NOVEMBER 1, 1873. a 5 Name of star. T: Aa. Bb. Ce. Te AR. AT. 5 hom 8. 8. 8. Ch (cite 9G hm. 8 hm. 8: W.| «= Capricorni ...--. 18 20 07.51 |4+ 6.42 |+ 0.05 '4+ 0.17 18 20 14.15 |20 20 04,37 |41 59 50.72 W.| ¢ Delphini ...-....- 27 14.86 |4+ 3.92 |+ 0.05 + 0.16 27 19.00 27 10.15 51.15 W. Groombr. 3241- -. 30 49,49 |— 9.78 |4+ 0.32 + 0.51 30 40.54 30 31.08 50. 49 We |@) Cyeniz-o---c---- 37 15.42 |4+ 0.14 |+ 0.15 + 0.22 37 15.93 37 06.95 51. 02 W.| 2 Aquarit-......-: 45 53.31 |+ 5.61 |+ 0.06 + 0.16 45 59.14 45 49,98 50. 84 Wa live (Cysnie ee oene-ae 52 35.35 [4+ 0.77 |+ 0.14 + 0.20 52 36. 46 52 27.36 50. 90 Way) Gi Cygnieseeen.- = 19 O1 21.29 J+ 1.13 |4+ 0.15 + 0.20 |19 01 22.77 [21 01 13,84 51. 07 Wa | SC yemieoeseeeees 07 39.75 |-+ 2.13 |4+ 0.13 + 0.18 07 42.19 07 33.27 51. 08 W.||@ Cephei---------- 15 45.87 |— 4.06 |4 0.25 |+ 0,33 15 42.39 15 33.36 50. 97 104) [5 Ee IREEE IN Ge pcos cece 20 35 15.12 |+ 3.98 |+ 0.0L — 0.16 |20 35 18.95 [22 35 09.85 50. 90 B. | a4 Aquarii -.....-.. 46 05.47 |+ 5.51 |+ 0.06 — 0.16 46 10.88 46 01.70 50. 82 E. | @ Piscis Aus.-...... 50 92.30 |+ 7.59 |4+ 0.03 |— 0.18 50 49.74 50 40.63 50. 89 E. | a Pegasi .-----.--- 58 34.09 |+ 3.60 |+ 0.18 |— 0.16 58 37.71 58 28. 45 50.74 EH. | o Cephet --2--- ---- 21 13 43.37 |— 6.52 |4+ 0.3L |— 0.41 |21 13 36.75 [23 13 27.58 50. 78 E.| 4 Draconis, L.C..-| 23 42.74 |+17.80 |— 0.16 |+ 0.45 23 00. 83 22 51.18 50. 35 |) 42) Cephel --=--- ---- 34 37.66 |—15. 49 |+ 0.17 |— 0.69 34 21.65 34 12.26 50. 61 E. | 26 Piscium 48 45.78 |-+ 4.25 |— 0.02 |— 0.15 48 49. 86 48 40.61 50. 75 E. | » Piscium - 52 55.00 |+ 4.32 |4 0.01 |— 0.16 52 59.17 52 50.09 50. 92 E. | @ Piscium.. [21 56 08.17 |4 4.18 |4+ 0.02 |— 0.15 [21 56 12,22 [23 56 02.95 |4-1 59 50.74 NORMAL EQUATIONS. O=+ 1.31 419.00 dt+ 5.27 a'— 228¢ Adopted a =-| 68.700 Azimuth = - 68.755 O=— 2.394 5.27 dt + 21.42 a! —11.34¢ ai = + 08.055 c= — 08.156 O0=+410.97— 2.28 dt —11.34 a! + 68.04 c 378 ASTRONOMY. Observations and reductions for time taken at receiving station. OGDEN, UTAH, OCTOBER 29, 1873. g Name of star. Aa. Bb. Ce. ih AR. AT. Ss Be 8. Ae ics ges hm 38. Mm. 8 By) 8° Aquarit dul | aes | lee OY AR Cece Socolse acl} SSE Seccilescollesca|oeall 32 IDEA —-oo5se}[eo-- Bee Baq| ene loene| >< t. (Ceti: - ss 22 e225 22 Sai loc ao ase5|acaa| soos Dee Laconisieeesees aN rear (ane ete Becieed|teee « Cassiopeig@ .---}---- re ee paltcie|toeelsteaili Draconis. ese: > ce Ee eY eens ete Hee [Eee Se pa | G Cassiopete jess. |== "|| 6) esos |a-=e SeSc|oeca) boce||| (9 Cyettiasscss cas SS ae lesars| aeee| eee ais| Bates n Cassiopeiz ..-..]---- Sdn ane ees Bool sseclecoa|iiie ACB seas asee SSUES aE Sal eels =e |e 7? CREO NSES case|les nel) BS ee ce||eoso|lesoc|eese|lence @ Cyonilee ees Sl lea] eee] ees ese) eee lesoo e Piseium -.---- Seta > Beers) (aoe BosG||Soonlbsesiloe Jeb yea sos Sane SETS ae Jae ee B Andromeda) === |ma20 |< || 28] = as ae |= == |- == ke) Draconigue===.e X€ |lsso=|lsea5)/2=s-|/s-25/s205|=5-- Pee AOL) Ot Weta ete lee) eral ese eset seo) ese wiCyeni 2 --ceees > eal eee | | eel eee ose nl ee @) SCOrMpilesenee =| esac eer) caer > likseol| >< | e eal eee eset eee Sealeetee 60 Herculis-.-.... 2 |lsosel|2nae|!seo2 acoe|iecea|laosel|| 6 IRAE sso sncce||sece||sene BE |[s= oee|lenee|[sce- Groom. 2415 ..-| X |.---].---|---- soalsecs|ocea||) Ab IRAE s25- sccoo|lesce||sces|| OK |leee|[eose|/as oe|/ooe Geb raconis)------ ee |leneellacaellcees par sleee | Dea he, WGepheiscs. ts ees- | sae ase el Reeealioc er Caealeeee a Herenliseesses.||see- SLES LOS || DOMES == || ieee EIScISMATIS ee sel oe se esas 54 eesese| eveeecal ae | eae ae eos co secs|lecce|leece|[aoas|| $% |Jescel| 3¢ |l-ose Bradley 3077.-..-|----|---- BS ||eoee|leo oc) |= e||so0¢ 44 Ophiuchi .-..--- eee ee SGX ES Rul” Bewasit se oe cee| esa | anos hel ceed | peel senses Enh ea We Cocoa coals aal|ascal| 3< |p B< |eoocl|P 7 LAER sees seeec|leecelleceal| 36 ||eece|leccalleceallesee % Herculis:-2---- S |feeco|es ee] lac sac|leose|Kose Cepherteeas=sees | ease 8 |lsse||soss sese|isece B Draconis ...-.. X|enesleoe-|a--| ===) oS | 38 ls Cassiopeia (H))-]E-=-)==-— Se |eeee| sass Soe eer @. Draconis -2<2ee | Sees ee eee sess anne) Xo ab: WPepasi TIME DETERMINATIONS. 391 Observations and reductions for time taken at sending station. LAS VEGAS, NEW MEXICO, AUGUST 8, 1874. = 3 Name of star. aM Aa. Bb. Ce. Ave AR. AT: ham... 8 8. 8. Eh WWontips GB hem 8. ™m 8. Balke Ophiuchie-=.-—~- 16 58 03.94 |— 0.54 |+ 0.18 |— 0.38 |16 58 03.20 [16 51 44.18 | — 6 19.02 E: |e” Herculis!=-=-.-.<- 17 01 49.44 |— 0.11 |+ 0.23 |— 0.44 |17 01 49.12 55 30. 06 19. 06 E. | 60 Herculis -.---.-- 05 53.91 |— 0.49 |+ 0.19 |— 0.38 05 53.23 59 34.15 19. 08 E. Groombr. 2415... 10 01.20 |+ 0.15 |+ 0.26 |— 0.49 10 01.12 |17 03 41.87 19. 25 E. | ¢ Draconis 14 45.56 |4+ 1.51 |+ 0.42 |— 0.92 14 46.57 08 27.58 18. 99 W. | 44 Ophiuchi 25 02.69 |— 1.16 |4+ 0.11 |4 0.41 25 02. 05 18 43. 05 19. 00 W.| x Herculis 29 43.76 |+ 0.41 |+ 0.32 |+ 0.56 29 45. 05 23 25.78 19, 27 W.| 8 Draconis....---- 17 33 54.50 |+ 0.58 |+ 0.39 |4 0.61 |17 33 56.08 [17 27 37. 19| — 6 18.89 W.||0 Draconis ---- -.-. 19 18 49.68 |-+ 1.47 |+ 0.82 |+ 1.00 |19 18 52.97 19 12 33.92 | — 6 19.05 W.|7 Draconis-.-....---. 24 15.50 |-+ 2.25 |4+ 1.17 |4 1.32 24 20. 24 18 00.81 19. 43 Wa,| Go Cyent <2---.)---- 31 59.28 |— 0.17 |+ 0.43 |4 0.43 31 00. 02 24 40.79 19. 23 W. | « Aquile ---<---.. 36 28.90 |— 0.74 |+ 0.32 |4 0.39 36 28. 87 30 09. 42 19. 45 Wie | GO Ghyeait sso056 sece 39 23.68 |-+ 0.42 |4+ 0.66 |+ 0.60 39 25. 36 33 06. 08 19, 28 W.| y Aquile -...--... 46 37.66 |— 0.46 |+ 0.40 |4 0.39 46 37.99 40 18. 67 19. 32 By pel DYTaconis\ sce =: 54 55.64 [+ 1.77 |+ 1.22 |— 1.12 54 57.51 48 38.18 19. 33 Dene Cyenibees nt -=— 58 43.44 |+ 0.49 |+ 0.69 |— 0.63 58 43.99 52 24.73 19. 26 Be) peeA Quiles ts aes 20 04 21.44 |— 0.51 |+ 0,37 |— 0.39 |20 04 20.91 58 01.65 19. 26 E. | @ Aquile ----....- 11 10.86 |— 0.64 |+ 0.34 |— 0.38 11 10.18 |20 04 50.87 19. 31 E. | a? Capricorni ..-.--. 20 17 26.72 |— 0.82 |+ 0.30 |— 0.39 20 17 25.81 20 11 06.61 | — 6 19.20 NORMAL EQUATIONS. First series. 0=—1.16 + 8.00 dt—0.28a+4 2.75¢ a=— 15.23 0=+ 3.15 — 0.28 dt + 3.09a— 1.97 ¢ c=— 08.374 O= + 3.49 4+ 2.75 dt —1.97 a 4 17.37 ¢ Second series. O=— 5.56-+111.00dt— 2.84a— 3.17¢ a=— 18.070 O=+1483— 2.84 54112404 6.376 o=— 08.384 0=+ 22.05 — 3.17 6t-+ 6.37a+38.650 392 ASTRONOMY. : Observations and reductions for time taken at sending station—Continued. LAS VEGAS, NEW MEXICO, AUGUST 15, 1874. & I Name of star. Aa. Bb. Ce. Te AR. AT. Ss hm. 8. 8. 8. & |hm 8 |hom 28. Gila Bt EK. | 0 19 39 38.14 |+ 0.39 |— 0.04 |— 0.53 |19 39 37.96 |19 33 05.96 | — 6 32.00 E. | y 46 51.46 |— 0.43 |— 0.01 |— 0.35 46 50. 67 40 18.65 32. 02 E. | » 58 56.76 |-+ 0.45 |— 0.01 |— 0.55 58 56. 65 52 24.61 32. 04 E. | 0 20 11 23.76 |— 0.60 |— 0.03 |— 0.34 )20 11 22.79 20 04 50.86 31. 93 E. | a? 17.39.60 |— 0.76 |— 0.04 |— 0.35 17 38. 45 11 06. 62 31. 83 Wei |losCephetees sees 34 00.54 |+ 0.97 |— 0.04 |4 0.74 34 02.21 27 30.38 31.83 W.| 8 Delphini--...--- 38 12.86 |— 0.37 |+ 0.04 |4+ 0.35 38 12.88 31 40. 92 31.96 W.| a@ Delphini ..---..-. 40 21.62 |— 0.36 |+ 0.07 |4 0.35 40 21.68 33 49.69 31.99 AWe|) @ CASI Sesses s55e 43 41.87 |+ 0.23 |+ 0.15 |+ 0.48 43 42.73 37 10.61 32.12 W.| y Delphini --...-.. 47 23.06 |— 0.35 |+ 0.15 |+ 0.35 47 23.21 40 51.18 32. 03 W.| # Aquaril----....: 20 52 26.48 |— 0.71 |+ 0.16 |+ 0.34 |20 52 26.27 20 45 54.24 | — 6 32.03 W.| a Andromeda -...- 0 08 26.84 |— 0.10 |+ 0.08 |+ 0.46 | 0 08 27.28 | 0 01 54. 96 | — 6 32.32 Viel oe LRG ST! sae -ne coat 13 19.26 |— 0.26 |4+ 0.08 |+ 0.41 13 19.49 06 47.29 32.20 Vie || @ (ORG) sosS55oseses 19 35.30 |— 0.50 |+ 0.06 |+ 0.40 19 35. 26 13 03. 00 32. 26 W.| « Cassiopeiz ..---. 32 24.20 |+ 0.67 |4 0.19 |+ 0.86 32 25. 92 25 53. 66 32. 26 W.| ¢ Cassiopeia -.-...- 36 30.68 |+ 0.36 |+ 0.22 |+ 0.67 36 32.13 30 00, 01 32. 12 E. | 7 Cassiopeie -.~--- 48 03.96 |+ 0.47 |+ 0.34 |— 0.74 48 04.03 41 31.62 32. 41 E. | y Cassiopeix ...... 55 41.58 |+ 0.58 |+ 0.27 |— 0.80 55 41.63 49 09. 49 32.14 E. | e Piscium--...-.--.. 1 02 59.38 |— 0.33 |-+ 0.08 |— 0.40 | 1 02 58.73 56 26,51 32. 22 E. | 8 Andromede ....- 09 15.76 |— 0.01 |+ 0.08 |— 0.49 09 15.34 | 1 02 43.10 32. 24 E.| 7 Piscium......--.| 1 11 18.38 |— 0.08 |+ 0.06 |— 0.46 | 1 11 17.90 | 1 04 45.80} — 6 32.10 NORMAL EQUATIONS. First series. 0=— 3.57 + 11.00 d¢-++1.55a— 1.47¢ a= — 05.994 0=+3.12-4 1.55 06t-+3.4la+4 1.10¢ c=— 05,340 0=—+8.20— 1.47 6t+110a+19.11¢ Second series. 56 + 10.00 dt —1.14a+4 0.22¢ a =— 0°.697 =— 08,401 0=+1.56 +10 0O=—+4174— 1.146t-+3.25a— 0.63¢ O=48.43+ 0.22 dt —0.63 a + 22010 | Clamp. 4444ehehee TIME DETERMINATIONS. 393 Observations and reductions for time taken at sending station—Continued. LAS VEGAS, NEW MEXICO, AUGUST 16, 1874. Te AR. Miia EE iis Gite 6b 22 41 46.73 )22 35 13.23 47 03.80 40 30. 26 51 48.10 45 14,70 ot, Ute aae 50 44.35 23 13 49.34 23 07 16.04 25 41.33 19 08. 00 34 18.03 27 44.57 40 48. 61 34 15.10 48 29. 87 41 56. 62 23 52 40.62 [23 46 07.19 a=—08719 © c = — 08.296 1874. unde AR. hem. 8. hm 8. 16 26 18.89 |16 21 43.20 29 25.94 24 50. 05 32 52,18 28 16.36 41 09.95 36 34. 07 46 08.73 41 32.95 56 20.10 51 44, 22 17 01 34. 82 56 59. 03 13 32.04 |17 08 56.18 15 17.24 10 41.58 Name of star. T Aa. Bb. Ce. hom. 8 8. 8. 8, (6 22 41 47.30 |— 0.32 |+ 0.05 |— 0.30 a 47 04.24 |— 0.17 |+ 0.05 |— 0.32 t 51 47.88 |+ 0.87 |-+ 0.06 |— 0.71 a 57 18.86 |~— 0.76 |+ 0,01 |— 0.34 Bradley 3077 ..-.|23 13 49.38 |+ 0.47 |+ 0.03 |-— 0,54 Up ep aslo o4--—- 41 13.93 |+ 0.16 |+ 0.03 0. 05 41 14.07 W..| 7 Herculis---....-- 43 16.33 |+ 0.04 |+ 0.05 0. 06 43 16.36 E. | « Ophiuchi-.....-. 56 24.01 |+ 0.48 |+ 0.13 0. 05 56 24. 67 E. || @ Hercalis...---.-- 17 01 39.19 |+ 0.14 |+ 0.18 0.06 |17 01 39.57 KE. | a! Herculis-.-...... 13 36.01 |+ 0.40 |+ 0.14 0. 05 13 36. 60 E. | Hercnulis-2.-- ---- 15 21.54 |+ 0.08 |+ 0.16 0. 06 15 21,84 °C E. | 44 Ophiuchi.....-.. 23 22.59 |+ 0.89 |+ 0.05 0. 05 23 23.58 s E. Groom. 966,L.C -| 26 32.07 |+ 3.11 |— 0.17 0.18 26 34.83 : E. | B Draconis ..---.-- 32 17.54 |— 0.28 |+ 0.16 0. 07 32 17.49 27 36.97 E. | o Draconis ......-. 17 42 24.68 |— 1.16 |+ 0.25 0.13 |17 42 23.90 |17 37 43.43 NORMAL EQUATIONS. 0=+ 0.63-+ 13.00 dt+ 4.39a— 1.280 a= -+ 08.897 0=— 14.02-+4 4.39 dt + 18.23 a—17.99 ¢ o=-t 05.046 0=-+ 13.67 — 1.28 dt —17.99 a+ 44.74 ¢ TIME DETERMINATIONS. OGDEN, UTAH, AUGUST 16, 1874. 395 Observations and reductions for time taken at receiving station—Continued. | Clamp. 4444445 RR eee MA OS XDA 44 Ophiuchi B Draconis o Draconis. Name of star. oe Aa. Bb. Ce. 4 AR. Ps hm 8 as 8. 8. hom: 8 h. m. : m. 8 saeeiese ss 16 26 22.10 |4+ 1.34 0. 00 0.00 |16 26 23.44 |16 21 43.08 | — 4 40.36 wsee secs 29 29.89 |+ 0.46 |— 0,02 0. 00 29 30.33 24 49,92 40. 41 seeemsse 41 14.17 |+ 0.23 |— 0,05 0. 00 41 14.35 36 33.91 40. 44 eee cece 43 16.82 |+- 0.07 |— 0.07 0.00 43 16,82 38 36. 26 40. 56 Camelop., L. C- -- 45 10.94 |+- 3.06 |+ 0.06 0. 00 45 14.06 40 33.50 40. 56 eee 56 24.00 |+ 0.69 |— 0.10 0. 00 56 24, 59 51 44,11 40. 48 Sere 17 01 39.49 |+ 0,21 |— 0.21 0.00 |17 01 39, 49 56 58. 87 40, 62 eer 13 07.05 |+ 1.32 |— 0.47 0. 00 13 07.90 {17 08 27.24 40. 66 Bo Sens oe 23 25.00 |— 1.29 |— 0.10 0. 00 23 23.61 18 42.95 40. 66 Leshese 32 17.52 |-+ 0.40 |— 0.40 0. 00 32 17,52 27 36.94 40. 58 a 42 22.80 |+ 1.67 |— 0.62 0. 00 42 23.85 37 43.38 40, 47 72 Hereulis)s-- 2---- 46 14.57 |— 0.34 |— 0.30 0. 00 46 13.93 41 33. 62 40, 31 eeaiesee 17 58 23.33 |+ 0.36 |— 0.43 0.00 |17 58 23.26 |17 53 42.89 | — 4 40.37 y Draconis NORMAL EQUATIONS. For E.: 0=— 1.93 + 7.00 dt + 4.65 a 0 = — 6.42 + 4.65 6¢ + 7.04 a a=-+ 15.300 For W.: 0=-+ 1.53 + 6.00 dt — 1.654 0=-+ 4.09 — 1.05 dé + 3.93 a a =- 18.298 The following tables show the corrections and rates of the chronometers used at Las Vegas and Ogden : CHRONOMETER AT LAS VEGAS—NEegus, No. 1344. Date Local sidereal | Correction of chro- | Adopted hourly : time. nometer. rate. * 1874. h. hom. & 8. ugust 8 17.2 — 0 06 19.07 August 8 19.7 19,28 ++ 0.080 ugust 15 20.1 31.98 August 15 0.6 32. 28 artes August 16 23.2 — 0 06 33.41 -+ 0.055 CHRONOMETER AT OGDEN—NEcus, No. 1491. > Ting Local sidereal | Correction of chro- | Adopted hourly ° time. nometer. rate. 1874. h. km 8 8. August 7 16.8 — 0 04 35.83 August 8 17.1 36. 72 a HL August 15 17.0 40. 35 = August 16 17.1 — 0 04 40.50 a Ee 396 Signals sent from— August 8, 1874: ‘Ocden=-= Las Vegas - ..-. ; August 15, 1874: ASTRONOMY. Final results of longitude. oo Mean of sig-| mp. Difference] 2.2 Recorded at—|nals sent and ew Bae Comeoted of longi- cs = | Means. received. : : tude. of Re ho m. 8 hem. 8. hom 8. Mm. 3. 8. m. 8. Las Vegas --.|18 47 42.33 |— 0 06 19.18 |18 41 23.15 Ogden --.---- 18 18 53.92 |— 0 C4 36.76 |18 14 17.16 | 27 05.99 Las Vegas ---|18 51 40.25 |— 0 06 19.18 |18 45 21.07 Ogden ..---. 18 22 52.26 |— 0 04 36.77 /18 18 15. 49 05.58 | 0.41 | 27 05.785 Las Vegas ...|19 02 26. 26 0 06 31.91 |18 55 54.35 Ogden ..---: 18 33 28.78 0 04 40.36 |18 28 48. 42 05. 93 Las Vegas. ..|19 10 45,11 0 06 31.92 |19 24 13.19 Ogden ..--.. 18 41 47.84 0 04 40.36 |18 37 07.48 05.71 | 0.22 05. 820 Las Vegas ..-| 9 01 16.34 0 06 32.65 | 8 54 43.69 Ogden ..---- 8 32 18,15 0 04 40.45 | 8 27 37.70 05. 99 Las Vegas -..| 9 14 28.94 0 06 32.66 | 9 07 56.28 Ogden ...--. 8 45 31.09 0 04 40.45 | 8 40 50.64 | 27 05.64 | 0.35 | 27 05.815 02 27™ 058.807 + 08.007 Or, 6° 46! 27/.10 Observations and computations for latitude. LAS VEGAS, NEW MEXICO. Number | Microm. _, | Half-sum of BEN ofstar. | readings. SELES declination. 1874. is Gh d. d. Oe July 31... 6553 6 92.6 | 23.0 | 13.8 6581 9 42.0 | 10.5 | 27.0 35 37 06.2 6654 9 91.7 | 19.8 | 18.4 30 30.1 6697 2 18.3 | 18.0 | 20.2 6709 12 43.9 | 18.0 20.0 28 53.8 | 6731 | 11 06.0 | 20.0 | 17.3 | 6762 | 7 80.7 ay al eae! 37 38.2 6799 11 21.0 | 19.3 | 18.0 40 32.7 6827 | 3 42.6 | 10.0 | 27.5 6830 } 11 77.0 | 24.0 | 13.4 | 258 p.m. 40 51.3 6851 2 04.0 | 23.5 | 13.7 6875 14 55.3 | 12.3 | 24.8 43 30.1 6803 | 3 41.2] 16.0 | 21.0 6905 PSheS20) 12950) ie eer | 35 41 48.4 Li] RAT SIL G |ecceee MEA 7 Oia OND) ees WL BS |e) |e cene = 2 TRS | S58 |Lescs er TO0Nd s|=345) | eee Microm. and reff. Mu “ a“ d 5 21.6 |—1.6 |4+0.1 8 02.: 6 24.3 |-+3. 6 | Corrections. Latitude. Level. Merid. LATITUDE DETERMINATIONS. 397 Observations and computations—Continued. LAS VEGAS, NEW MEXICO. ————————————————————————————————— Level. Corrections. Number | Microm. Half-sum of c Bate: of star. | readings. Remarks. | qe¢lination. Nikarort Lantude. N. 8. | erat Ain Level.|Merid. 1874. t. d. d. d. i ee Z Ee se ¢ a ON ee July 31... 6937 8 01.2 | 17.0 | 19.8 35 31 51.1 |4 3 41.3 |—5.5 |..---. 35 35 26.9 6967 5 74.0 | 16.2 | 21.2 30 21.1 |+ 5 09.5 |—6.0 |...... 27.6 6998} 1376.8] 83 | 29.4 Changed 7067 | 13 49.3 | 22.3 | 15.2 | inelina- 7101 4 94.3 | 38.0] 0.3] tion. 29 51.1 |4+ 5 29.5 |4-10.3|...--. 30.9 7119 | 13 04.7 | 33.5] 4.3 7152 5 08.7 | 10.4 | 27.0 40 30.9 |— 5 06.8 |42.9 }.----- 27.0 7166| 9 88.5 | 25.7 | 12.0 7200 7 23.5 | 27.2) | 10.7 37 02.1 |— 1 42.1 [47.0 |..---- 27.0 Changed 7241 2 63.0 | 17.0 | 20.5 | inclina- 34 59.6 |4 0 35.0 |—8.6 |.----. 26.0 7256 353.7 | 2.3 | 36.0] tion. 7290 | 21 24.0 | 26.0 | 12.9 46 52.2 |—11 22.2 |—4.8 |..-.-.. 25.2 7309 | 10 01.8 | 17.8 | 20.0 38 52.3 |— 3 22.8 |-2.8 |.---.. 26.7 7334 |— 1 25.0 |.18.0 | 20.0 46 04.9 |—10 37.0 |-2.8 |..---. 25.1 7381 | 15 28.0} 14.2 | 24.2 7394 3 49.5 | 18.2 | 20.2 43 05.0 |— 7 37.2 |+0.9 |.---- 28.7 7404 5 68.0 | 17.8 | 20.7 41 41.6 |— 6 13.0 |+0.6 }...--- 29.2 7438 | 15 35.6 | 22.2 | 16.5 7450 7 91.0 | 18.2 | 20.0 7483 ) 10 34.0 | 11.0 | 27.9 37 05.2 |— 1 33.6 |—4.3 |.----- 27.3 74sg | 12 68.0| 5.3 | 33.5 | 80°p.m. : 7528 5 54.2 | 18.8 | 21.0 40 07.9 |— 4 35.1 |—6.8 |40.1 26.1 7548 | 19 46.3 | 10.3 | 29.0 44 27.6 |— 8 59.9 |—2.0 |..---. 25.7 7585 5 45.9 | 25.0 | 14.8 7598 1 42.0] 7.3 | 33.0 32 55.1 |4- 2 35.7 |-3.6 |.----. 27.2 7605 | 1855.7 | 19.8 | 19.9 7641 |— 0 30.0] 5.5 | 34.7 47 40.5 |—12 06.9 |—6.8 |.----. 26.8 7788 7 39.2 | 21.8 | 19.0 7810 9 49.5 | 11.7 | 30.4 36 53.7 |— 1 21.1 |-3.7 |.----. 28.9 August 1- 6553 6 85.6 | 23.3 | 18.0 6581 9 42,0 | 20.0 | 22.0 37 06.4 |— 1 38.8 [40.8 |.----. 28.4 6654 8 86.3 | 18.5 | 23.0 30 30.3 |+ 4 51.4 |4+6.8 |.-.-- 22.5 6697 1 30.4 | 37.5] 4.0 c 6709 | 11 46.5] 8.0 | 33.0 238 54.0 |4+ 6 31.7 |42.0 |.----. 27.7 6731 | 10 62.5 | 20.2 | 20.7 6762 7 21.0 | 56.4 | 15.0 37 384 |— 2 11.6 [42.5 |.---- 29.3 6799 | 11 60.0} 21.3 | 19.8 6827 3 79.0) 12..0)) 29.7 40 33.0 |— 5 01.1 |—3.6 |.----- 28.1 6851 2 66.0 | 19.0 | 22.0 6875 | 15 23.5 | 29.4 | 12.0 35 43 30.4 |— 8 04.7 i45.38 |..---. 35 35 29. 0 398 ASTRONOMY. Observations and computations—Continued. LAS VEGAS, NEW MEXICO. Date. Number of star. 1874. August 1- Microm. readings. _ — _ a WOM MM nmw wo” _ Eos) fete Sh) So! GEBUSD Whey wo ow Oro NPwW BO CW PW COOrd ws an sor _ LS os oe Ler) we oD Iore wn OF moO = oor = omo Dow ONS AWo we is wo _ et WDO NWO OF HRW FH WSS . =O Pw Ong = = 0 Ob Sw ND OS WIDE 5 S29 | | aS or Sww a: re SEN oon ee oan — 5 Lier) bs =} _ sts FS) oe to oS) | Level. Half-sum of Remarks. declination. N. Ss. d. d. Ot 21.3 | 19.7 31.0 | 10.3 35 36 48.6 19.2 | 22.0 315155 17-9 | 23.6 30 24.4 30.0 | 71.7 22.3 | 20.0 36.8 | 5.6 29 50.5 19.5 | 22.5 22.8 | 18.9 40 31.2 18.0 | 23.9 33.0 | 9.0 37 02.3 22.5 | 20.0 34 59.9 6.0 | 36.0 40.0 | 2.0 44 10.6 21.6 | 19.8 38 52.5 3.0 | 18.9 46 05.2 32.6 | 10.2 20.0 | 22.0 43 05.1 19,0 | 22:2 41 41.7 17.4 | 24.0 20.7 | 19.8 20.4 | 20.0 37 05.5 23.0 | 17.3 12.0 | 29.0 40 08.2 19.7 | 21.0 44 27.9 12.6 | 27.6 33.0] 8.0 32 55.5 21.3 | 19.2 19.0 | 22.7 47 40.9 22.2 | 20.2 21> hehe 40 37.6 Pan) || We 49 29.9 25.0 | 17.3 49 34.6 23.3 | 19.8 20.3 | 22.3 36.0] 7.0 36 54.0 23.0 | 19.5 32.0 | 11.2 31 52.7 18.0 | 24.8 25.5 | 18.0 35 89 05.6 Corrections. : Latitude. Moron Level. |Merid. i a“ “ a“ o7 a“ — 6 25.2 |+5.2 }.....- 35 35 28.6 + 3 33.2 |4+3.6 |.----- 28.3 + 5 00.6 |42.9 |.----. 27.9 + 5 30.5 |+7.6 }|.----- 28.8 — 5 02.9 |40.2 |.----. 28.7 — 1 39.7 |+4.2 |....-. 26.8 + 0 34.0 |-6.4 }..---- 27.5 — 8 45.5 |+1.9 |.----. 27.0 — 3 29.2 |+5.6 |..--.. 28.9 —10 44.7 |+6.1 |.--... 26.6 — 7 36.2 |}-2.0 |-----. 26.9 16) 1203) |=) eaae ae 27.2 — 1 38.8 |+0.3 |.----. 27.0 — 4 39.8 |—3.0 |.----- 25.4 — § 57.0 |—3.8 |------ 27.1 + 2 29.4 |4+2.3 ]...... 27.2 —12 13.4 |—0.4 |.----. Dia — 5 12.1 |40.5 }..---. 26.0 —14 04.3 |+2.6 |..---. 28.2 —14 10.2 |42.6 |.----- 27.0 — 1 30.6 |46.3 |.----. 29.7 -+ 3 29.8 |+5.6 |.--.-. 28.1 — 3 39.8 |+0.2 |..--.. 35 35 26.0 LATITUDE DETERMINATIONS. 399 Observations and computations—Continued. LAS VEGAS, NEW MEXICO. Level. Corrections. Number | Microm. __ | Half-sum of 3 Date. of star. | readings. Remarks. declination. | y;orom : Latitude. aadtreth Level.|Merid. 1874. Un d. is I fo} i “a / a“ “ “ fe) ‘ a“ August 1. 7963 5 23.6 | 21.8 | 22.3 7996 | 11 76.0 | 33.2 | 11.0 35 31 09.6 |+ 4 11.4 |+5.0 }.----- 35 35 26.0 8034 | 15 77.3 | 15.0 | 29.0 8083 7 51.0] 36.0) 8&8 3004.8 |+ 5 18.6 |+38.1 |..---. 26.5 8114 | 13 61.6 | 21.2 | 23.0 8131 4 45.7 | 13.0 | 31.0 Al 24.1 |— 5 53.1 |—4.6 |.--.--. 26.4 August 2- 6967 6 68.4 | 21.2 | 21.9 6998 | 14 44,2 | 29.3 | 13.8 30 24.7 |4+ 4 59.1 |43.4 |------ 27.2 Cloudy August 3. 6553 Asoka ON eliza again. 6581 9 84.0 | 32.0] 2.0 37 06.9 |— 1 43.9 |47.0 |..---- 30.0 6654 9 53.0 | 21.0 | 13.0 30 30.8 ]+ 4 57.5 |—1.1 |.----- 27.2 6697 1 81.0 | 11.2 | 23.9 6709 | 12 04.0 | 20.2 | 14.5 28 54.5 J+ 6 34.4 |—1.6 j..---.. 27.3 6731 | 10 22.0 | 19.3 | 15.0 6762 6 84.2 | 17.7 | 17.3 87 38.9 |— 2 10.2 |+1.1 |.----. 29.8 6799 | 11 56.7 | 21.2 | 13.8 6827 3 82.4 |—0.3 | 35.7 40 33.5 |— 4 58.4 |—6.6 |..---. 28.5 6851 2 89.2 | 15.0 | 20.¢ 6875 | 15 50.5 | 28.2] 7.0 43 31.0 |— 8 06.2 |+3.7 |.----- 28.5 6893 9 20.9 | 17.0 | 17.6 6905 | 11 92.9] 5.8 | 29.0 41 49.1 |— 6 14.7 |—.5 |..---- 28.9 6937 7 44.0 | 18.1} 16.0 31 52.0 |+ 3 38.1 |—1.2 |-----. 28.9 6967 5 58.5 | 17.9 | 17.0 30 25.0 |+ 5 05.0 |—1.4 |.----- 28.6 6998 13 50.0 | 14.0 | 21.1 7067 | 12 08.5) 12.3 | 22.6 7101 3 B66) || Zab)! aiie@ 29 51.2 |4+ 5 35.8 |-+0.4 |.----- 27.4 | 7119 | 12 53.4 | 14.8 | 20.0 7152 477.1 | 12.2 | 22.7 40 31.7 |— 4 59.2 |—3.7 |.----- 28.8 7166 | 10 27.0] 17.1 | 17.4 7200 EEA) YAO) eer 37 03.0 |— 1 29.2 |—4.9 |.----. 28.9 7241 2 82.2 | 18.7 | 16.0 35 00.5 |4- 0 32.3 |—7.0 |------ 25.8 7256 3 66.0 1.0 | 34.0 XX, 401 | 17 21.9] 31.9) 3.6 44 11.2 |— 8 42.7 |—1.1 |.----- 27.4 7309 9 48.8 | 12.3 | 22.7 38 52.9 |— 3 27.1 |42.9 |------ 28.7 7334 |-— 1 81.0 | 14.0 | 21.1 46 05.6 |—10 42.7 |+3.6 |.----- 26.5 7381 | 14 66.1) 29.7] 6.9 7394 il fobs bs || 2A || BY 42 05.6 |— 7 34.1 [8.5 |-.----- 28.0 7404 PE eel GGSane 25 41 42.2 |— 6 10.8 |—3.6 |.----- 35 35 27.8 7438 | 13 61.91 6.3 1 30.5 400 ASTRONOMY. Observations and computations—Continued. LAS VEGAS, NEW MEXICO. Level. Corrections. Number | Microm. E Half-sum of z Date. of star. | readings. = SERIES, declination. | yF;6r9m Latitude. N. Ss analvate Level.|Merid. 1874. t d. d. d. fo} i “ a fe} i “l August 3- 7456 6 35.0 | 21.3 | 15.6 7483 8 96.0 | 18.0 | 20.0 35 37 06.0 |— 1 40.6 |+0.9 |...... 35 35 26.3 7585 5 84.2] 1.0 | 36.7 7598 1 86.8 | 33.3 | 4.7 32 56.0 |-+ 2 33.2 |—1.7 |...-.. 27.5 7605 | 18 00.4 | 15.3 | 22.5 7641 |— 0 89.6] 9.8 | 28.0 47 41.4 |—12 08.6 |—5.9 |.__.-. 26.9 7695 | 11 94.0 | 16.0 | 22.7 7706 3) SLY || P3835 || TE.33 40 38.2 |— 5 13.1 |40.3 |...--. 25.4 7121) |—22:8050)| eee enna 49 30.6 |14 06.3 |42.2 |...... 26.5 7731 |— 2 94.0 | 21.5 | 16.0 49 35.3 |—14 11.7 |+2.2 |.-.---- 25.8 7765 | 19 15.0 | 21.3 | 17.2 7788 6 43.5 | 17.0 | 21.2 7810 8 76.0 | 28.1 | 11.0 36 54.5 |— 1 29.6 |1+3.0 |.-.--. 27.9 7829 8 02.8 | 18.0 | 20.1 7833 8 33.2 | 15.0 | 23.0 Soldotna — oan eee 27.3 7843 | 10 80.3 | 20.0 | 18.0 | 258 p.m. 7858 Ei ibhsy |= Yeey|| aiths3 31 53.3 |4 3 39.3 |-4.7 |40.1 25.0 7875 | 11 57.1 | 17.9 } 20.0 7908 6 07.5] 2.3 | 26.0 39 06.2 |— 3 31.8 |—8.3 |...--. 26.1 7963 4 37.6 | 17.7 | 20.5 ayy) Nl Bay |) 7633 )) STEW) 3L 10.2 |-+ 4 23.6 |—6.1 |..--.. 7.1 8024 4 71.8 | 18.3 | 20.0 28 46.3 |+ 6 48.5 |—7.6 |...-.. RAP 8034 | 15 31.5] 3.8] 34.8 Z 8083 6 90.7 | 27.0 | 12.3 30 05.4 |+ 5 24.1 |—3.5 |.----. 26.0 8114 | 13 12.1 | 19.8 | 19.0 8131 3 85.9 | 19.0 | 20.0 41 24.3 |— 5 57.0| 0.0 |..---. 27.3 August 4. 6553 6 50.0 | 24.5 | 24.0 6551 9 08.7 | 24.0 | 23.6 37 07.2 Sh Mi [EY A | 27.7 6654 9 16.5 | 24.0 | 22.8 30 31.1 |+ 4 58.5 |—1.6 |..--. 28.0 ~6697 1 42.0 | 19.6 | 27.9 6709 | 11 59.2} 29.0] 18.2 28 54.3 |+ 6 32.1 |+0.6 |..-..-. 27.5 6731 | 10 44.6 | 20.6 | 26.4 6762 7 09.3 | 26.0 | 21.0 37 38.7 |— 2 09.2 |—0.2 |...... 29.3 7241 Pa Oot) |) ORES || TBA a 35 00.8 |4+ 0 25.2 |-2.6 |...--. 28.6 7256 3 37.4 | 18.2 | 16.3 7290 | 21 21.0 | 17.1 | 17.4 46 53.4 |--11 27.5 |40.4 |..---. 26.3 7309 9 64.2 | 17.0 | 17.2 7381 | 14 89.7 ! 13.7 ' 21.9 35 38 53.2 — 3 22.5 |—2.0 |..._-. 35 35 28.7 LATITUDE DETERMINATIONS. 401 Observations and computations—Continued. LAS VEGAS, NEW MEXICO. Level. Corrections. Number | Microm. Half-sum of c Date. of star. | readings. Remarks. declination. a Latitude. PON: 8 Microm. |r evel.|Merid ¥ oS and refr. slic shaacan 1874. td: d. d. On a Ui ae ua A ° Hi August 4. 7394 2 55.1 | 17.0 | 18.0 35 43 05.8 |— 7 42.4 |-+5.5 |..---. 35 35 28.9 7404 EL 7 Tile | ieze 41 42.4 |— 6 19.4 |+5.7 |.--.-- 28.7 7438 | 1454.3, 30.1 | 5.5 7450 (3) PASS |) We || ae) 7483 9 42.9 | 28.2) 7.4 35 37 06.4 |— 1 44.3 |+5.0 |...--- 35 35 27.1 As ascertained by observations at Ogden, the longitude of the observ- atory at that place is 7° 27" 59°643 west of Greenwich. Adopting this result in the determination for station at Las Vegas, we have— Longitude... 78 00™ 538.836 or 105° 13/ 27.57 + 0”.10 west from Greenwich. Longitude.. 12 52™ 41°.716 or 28° 10! 25.77 west from U.S. Naval Observa- tory, Washington, D. C. with a probable error of 0*.007 in relation to Ogden. Latitude ... 35° 35! 27.66 + 0.07 north. 26 AST U. 8. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN, Ist Lizut. GEO. M. WHEELER, Corrs or ENGINEERS, U. S. ARMY, IN CHARGE. RESULTS OF OBSERVATIONS MADE BY DR. F. KAMPF AND JOHN H. CLARK IN THE DETERMINATION OF THE ASTRONOMICAL CO-ORDINATES OF CIMARRON, NEW MEXICO. SEASON OF 1874. COMPUTATIONS BY Dr. F. KAMPF anp JOHN H. CLARK. 403 =o) oe oi ‘ Se ee ee oe 2 ¥ a ? i= / : 1: a a Ao : an 7 -. a ee r P - = OA eaten Hor 7 a = “ 7a a > = a ” a ea . ‘ 2 » 17 ot FR AO : habe 2 RSA Cr ree oy ff 2 UR Ae LT ke Pa Det ep LNT VO Pave a wu 1 2 fr CIMARRON, NEW MEXICO. GEOGRAPHICAL POSITION OF STATION. Longitude, . . .. . . . 104054’ 59.04 + 0.20 west from Greenwich. WATE 6 oo 6 6 6 5 6 0 } 6GO GI TIME SE WAU) mayan Barometric altitude of observatory above sea-level, 6384.5 feet. Cimarron, Colfax County, New Mexico, is a settlement of 500 inhabi- tants, half of whom are Mexicans. The town is surrounded on the west and north by high mountains and by mesas in the east and south. It is crossed by the Cimarron River, which flows from west to east. The prin- cipal part of the town and an extensive tract of the adjacent territory are the property of an association of English capitalists called the Maxwell Land-Grant and Railway Company. The country is rich in coal and gold, and is well adapted for agriculture and the raising of cattle. By permission of Mr. Morley, vice-president of the Maxwell Company, the astronomical monument was fixed in the corner of a lot in the southern part of the town, from which there is good opportunity to make connection with natural objects. The meridian is marked by two pillars of solid stone planted in the earth and extending three feet below and one and a half feet above the surface of the same. The center of the south meridian-mark is exactly in the meridian of the middle point between the two iron pieces which connect the platform and the foundation of the astronomical station; the center of the cross on the north mark is about 0’’.7 east of the meridian line. METEOROLOGICAL CONDITIONS. The weather was exceedingly bad. It rained incessantly from August 21 to August 27, and although the observer arrived at this point on the 18th ‘of the month, he found no night suitable for observations until the 31st. Regularly at 11 p. m. a heavy wind arose, blowing from the west. The observatory, instruments, &¢., were the same as at the previous 405 406 ASTRONOMY. station, Las Vegas. The telegraph-line was in the same bad condition as at Las Vegas. In sending and receiving signals, assistance was kindly ren- dered by Mr. McCullough, postmaster. Mr. Charles Morrison was meteor- ological assistant and also in charge of lamps and other material. Exchanges for time were made with Mr. John H. Clark, at Ogden, on September 6, in the daytime, and on the nights of September 7 and 8. Observations for latitude were taken August 31, September 4, and Septem- ber §. The observer at Cimarron was Dr. F. Kampf. Each astronomer made the computations necessary for his own work. The only explanation for the irregularity of seventeen seconds in the chronometer on September 6 is, that the chain may have slipped a little from its cylinder. TABULATION OF STARS—TIME DETERMINATIONS. 407 Tabulation of stars used for determination of time at Cimarron, New Mexico, and Ogden, Utah, 1874. CIMARRON. OGDEN, CIMARKON. OGDEN. sl(sfrl{[ols |r] a sister ][_als|r | a a3/5/S]/8S/3]5]& B8/31/8/8]5)| 3] & fe} [lice | ce) [cee |} ee |) der |] ce! ea || ter |] ar |] ey heey | ee |e el ll feh [ist ist | i) |] =} | Su | FSP T=) | fe) feb) EME 2 | 2 2 | SS ee | Ss EE SW S| eS ee a) 2) | Ee ieee | reed aa HAlNHNIni|Ni/|n|M| wm NIin|n|Ml|wm|nM | mM Cy jshOy onl -oSoone -|lssoc|Bsee| jesse) |acoc Be A Gu les ni) Seles |e [3 EWAN. oaeees||se5s||eses|eeS|s505][22¢ 54 Weaoal|| (6 : 54 Eee ee Gee Ophinchie sess | peer mere | pene eae =as|| 3< |lescall| ae OCaeeise| wees (5 GNOME meso |acasl|es col [scoa|eace|jose|| BS llecoll| 9 sonel| SS |jesco|leoe< Kee Ophiuchie eee meee eee |ea=||e scalleao|) 2 || XX |] @ Aaqmiletoessece Se a4 26 llepce|leace (6 IONRGOANS sonces||secs| oeodl|aane acac\sese|| es |lasce|||@ LORCOME, saoee S scodlescel) £< |[acoslsoc- Gl Herculisees ces: | sees |eeee eae |e ees | seer nae Del phinis se oni --- === -(-—m1s ><. [Bee Goss) ean Te eH erculistee sae |= |=eee a= Sees leeea ll XM her (Oven. 2oeeeslt Ss |l/sena||sooe M6 |leseal|occe|[ere= 44 Ophiuchi ...-.-|---.|----|----]- ae eee laces) yan Delp hing se --|=——-|-——5] >= 6 ece|andelece= Gi Oraconisssasse. lease esse |e Saciiee x | X Iw Aquarii X .|----]----]|---- @ Ojo iht .-ps4llosos|secajlesae Pec col alexa 26. Draconis Smile ate! aminfimreters Bh eeeeNbt) Seas S| [eses|ceo)|sece||- aecleaosl| Se] S4 Ite. COM Soo Ses ell soms|/esee||oace Se -i--|-=--|-- = (LD COMNE) Gecesa||eeee|lores|ssen|sacs|5a5-|) 56 || 2< ||) @ IDG IIG See oe) See | /aooe XS [cee |[seoq||2en0|e=0- wu Hereulis---....|--- Soodaselace || Se |) Sole Cnreiiesas conelle sea|liee sore] BS |[eeod| Sse) lece ay! Draconis ...--.-|.--- sbed| Be cel ssacllssnclsecell S< || @ (CR MWGN cococse|See|leees Be Wl SS |eese|[enes| cece yy Ditaconisl-=-sea === 5- st Spaleo os] S| Se NO Amat SoS) |scea] eece 2 laeeal \eeca| Seeeliooce 22 Camelop., L. C.}---.|-.- }----|----|----| X | X |] @ Cephei -..----|---.|--- esoe| OX [eeee|[pscq||osce x Draconis ....-. BE |foeee| sess -cee|ooee|scad|lecnall|l tS ZAC METON Soacca| sens} |ece B |leenel[=eeelleocollosec 1 Agquile.--...-. x \ocos|[oeas scccllec slleccc|sonal|| @ IAEA soceoc|iscss|oses X | X |----|----]---- @ Wii )sesesccese x |---| --.|---.|.-.-|----|----]] # Capricorni ...]---.]----] X |----|----]----]---- 110 Herculis...--..]- aollernel) cal ane Pees sees ee OeDraconishe =| ———-|o—=— X |----|----|----]---- (Sie uy ee nee oan Bl erccl hone. || Satee| oes Geel ccs GeeAquanitves-- sallaceo|| 36 |bee-|losa¢f[eses|[os05 o Draconis .----. $4 |[Besellesceleaal|eses|secclleceel|| 2 URES epeeuco|hecee| [ose XE |[eece|/aaeo||o55¢)/ceae 50° Draconis: .----- nae \leenall 82 |[Becellecadl eecellesaelll (J AGEN sscece aeellcoo|| 2S lbadel|ossal\Gonolleses ep ee AQuile = ae or < x Se | Paes y Piscium ..---. set) 6 [leo cclfeoaul[e= Se Allogo5 6 JACEE isa|laeso|loces > aN Aeetel pees toes sooll|@ (Cepliileseocee s Seale Seq|acass| oso] eno d@ Sagittarii --.-.|----}.--. S25 cellecoalfeceal|ecoe||| 4! CHES@GES o- x |: = sosolleaeo ee OES CONTIN: cee eee alacme | hee 5 tee| eee eI VW) WEEE = goncos|/cece ee =2 oe 7 Draconis ...--. SC [Peealeeee|eo=el-=--|(o8 kiseram <-——7.|(2——- Ile sels ee) eee Observations and reductions for time taken at sending station. CIMARRON, NEW MEXICO, SEPTEMBER 5, 1874. = = Name of star. ANS Aa. Bb. Ce. ANE AR. AGES ‘s) Roam. 38. 8. De as 8. hm. 8 hom 8. m. 8. E. | x Draconis --.----- 18 28 39.48 |+15.88 |— 0.16 |— 1.75 |18 28 53. 45 18 23 20.44 | — 5 33.01 E.|1 Aquila -.--.-..-..| 34 02.18 |— 5.69 |— 0.04 |— 0.53 34 55. 92 29 23.23 32. 69 IDs | UAyne\ooddsoa scec 38 15.22 |+ 0.40.|— 0.07 |— 0.67 38 14.83 32 42.06 32. 82 Vivo fe Iie) Seeeses dese 51 00.64 |— 0.56 0.17 |+ 6.62 51 00.53 45 27.51 33. 02 W.|o Draconis.-...-- 54 42.64 |+ 6.10 |— 0.23 |4+ 1.01 54 55. 52 49 22.85 32. 67 W.| « Aquilw .-..----. 18 59 32.12 |— 3.05 |— 0.11 |+ 0.54 |18 59 29.50 |18 53 56.32 | — 5 33.18 0=>— NORMAL EQUATIONS. 12.91 + 6.00 S¢—1.63 a+ 1.47 ¢ 0 = + 33.83 — 1.63 d(+5.14a— 4.98 ¢ 0 = — 29.56 + 1.47 df — 4.93 a + 20.25 € 408 ASTRONOMY. Observations and reductions for time taken at sending station—Continued. CIMARRON, NEW MEXICO, SEPTEMBER 6, 1874. = 3 Name of star. ub AT. Ss) hm 8. m. 8. W.| y Piscium- -------- 23 16 12.28 — 5 34.51 W.| o Cephei -..---.---. 19 11.96 34.53 W.| 4 Cassiopeiz ...-.-- 24 56.76 34, 63 W.. | 72 Pegasi)------ ---- 33 18.70 34. 72 W.|ce Piscium....-.--.|23 39 02.70 — 5 34.64 NORMAL EQUATIONS. c taken from the next day’s observations = — 08.39 . a from high and low stars = + 5%.24 CIMARRON, NEW MEXICO, SEPTEMBER 7, 1874. z | -s = Name of star. ee Aa. Ce. es AT. tS) le Us 68 8. By 8. lets ER ie its ata: W. | 110 Herculis --.----. 18 46 08.36 |— 0.56 |— 0.01 |+- 0.38 |18 46 08.17 |18 40 16.35 | — 5 51.82 WieleG) lyre 22 == 51 19.10 |— 0.13 |— 0.06 |+ 0.43 51 19.34 45 27.47 51.87 W.| 50 Draconis -..---- 56 12.64 |+ 4.61 |— 0.27 |4 1.41 56 18.39 50 26. 40 51. 99 Wale ~ Aqnile <-=. 2--- 59 48.72 |— 0.71 |— 0.12 |+ 0.37 59 48. 26 53 56. 30 51.96 W.|¢ Aguile -.--.---- 19 05 31.64 |— 0.75 |— 0.16 |4+ 0.37 |19 05 31.10 59 39.15 51.95 E.|d _ Sagittarii ..---- 16 12.40 |— 1.63 |— 0.08 |— 0.38 16 10.31 |19 10 18.36 51.95 E.|7 Draconis -...--..| 23 49.10 |+ 3.83 |— 0.75 |— 1.23 23 50.95 £7 oot 51.84 Be | Bo .Gyeniae=-ease—- 31 33.28 |— 0.32 |— 0.32 |— 0.41 31 33.23 25 40.46 51.77 Bae) -Aquil-==-2—--- 36 03.08 |— 1.42 |— 0.20 |— 0.36 36 01.10 30 09, 24 51. 86 E. | y Aquile--------- 19 46 11.88 |— 0.84 |— 0.29 |— 0.37 |19 46 10.38 |19 40 18.46 | — 5 51.92 E.|a@ Equulei --.----- 21 15 27.98 |— 1.05 |— 0.19 |— 0.43 /21 15 26.31 21 09 34.16 | — 5 52.15 E.|a@ Cephei-----..-.- 21 28.52 |-+ 1.82 |— 0.54 |— 0.92 21 28.88 15 36.66 52. 22 ie |p/e VAT wewtl 4 5Se6 30 52.36 |— 1.24 |— 0.23 |— 0.44 30 50. 35 24 58.39 51. 96 E.| = Aquarii ----.--- 36 59.62 |— 1.40 |— 0.23 |— 0.48 36 57.56 31 05.52 52. 04 1H, |B LAGE cceeé seoe 43 56.28 |— 0.91 |— 0.28 |— 0.44 43 54.65 38 02.57 52. 08 W.|# Capricorni.-.--.| 52 22.08 |— 1.58 |— 0.26 |4 0.44 52 20.68 46 28.61 52. 07 W.| 79 Draconis -.-----. 57 08.40 |+ 4.05 |— 1.02 |4 1.49 57 12.92 5L 20. 83 52.04 W.|a Aquarii .------- 22 05 14.76 |— 1.20 |— 0.27 |4 0.43 |22 05 13.72 59 21.57 52.15 W.|c Pegasi.-...---.| 07 03.90 |— 0.43 |— 0.32 |4 0.47 07 03.62 |22 01 11.33 52.29 W.| 6 Agquarii ....---- 22 16 07.40 |— 1.40 |— 0.22 |+ 0.44 |22 16 06.22 |22 10 14.04] — 5 52,18 NORMAL EQUATIONS. First series. =— 836+ 10.00 dt— 112a— 0.6le a=— 15.868 O—-+ 24.87 — 1.12 4¢-4 12.2%6a4 3.82 ¢ c= — 08.359 0=+19.89— 0.61d!+ 3.82a+436510 Second series. O=+ 1.01 - 10.00 dt-4+1.75a— 1.42¢ a=— 18,974 0=4+17.80+4 1.75 614+8.06a+4 5.1le ce=— 08.482 O=+21.02— 1.42 d¢-+4 5.11 a4 24.726 TIME DETERMINATIONS. 409 Observations and reductions for time taken at sending station—Continued. CIMARRON, NEW MEXICO, SEPTEMBER 8, 1874. Observations and reductions for time taken at receiving station. OGDEN, UTAH, SEPTEMBER 6, 1874. EI Name of star. T. Aa. Bb. Ce. rT. AR. AT. 5 — hems ae ae Be 8. Tenens se Ream. 8s m. 8. W.|@ Delphini --....-. 20 39 43.94 |— 0.28 |— 0.06 + 0.51 20 39 44.11 20 33 49.59] — 5 54.52 Win ken Cy ones ssence ce 43 04.26 |-+ 0.15 |— 0.08 |-+ 0.55 43 04.88 | 37 10.36 54, 52 W.| y Delphini Foessews 46 45,60 |— 0.28 |— 0.05 |+ 0.51 46 45.78 40 51.09 54. 69 Aival/3) AiG) Boos 51 49.12 |\— 0.55 |— 0.03 |+ 0.39 51 48.93 45 54,19 54.74 W.| 76 Draconis -....... 57 26.10 |+ 3.88 |— 0.20 |+ 2.82 57 32.60 51 38.05 54,55 E.| ¢ i 3 31.92 |— 0.11 |— 0.08 |— 0.45 |21 13 31.28 21 07 36.83 54. 45 E. | 7 43.14 |+ 0.01 |— 0.10 |— 0.49 16 42.56 10 48. 06 54. 50 1 |p ee! 31.38 |+ 0.69 |— 0.19 |— 0.83 21 31.05 15 36. 64 54. 41 Eh. | B 59.10 |4+ 1.21 |— 0,24 |— 1.14 32 58.93 26 04.13 54. 80 Ey |e Pegasii-. 22232--- 21 43 57.90 |— 0.35 |— 0.09 |— 0.39 |21 43 57.07 ip 37 02.57 | — 5 54.50 NORMAL EQUATIONS. o=—— 5.17 + 10.00 dt — 5.85a— 3,81le¢ = — 08.751 O=-+ 34.71— 5.85 dt + 31.25.a + 29.95 ¢ = — 03,389 0=-+ 51.76 — 3.81 dt + 29.95 a + 75.87¢ a & Name of star. Ts Aa. Bb. Ce. ne AR. ANNE 5 hm 8. os 8. 3. him. 8. hom. 8. Mm. 8. Bho) Draconis). sees. 19 17 29.54 0.68 |-+ 0,21 0.00 |19 17 29.07 |19 12 32.73] — 4 56.34 ESS Om SAG Ui) pap ses ee ase 24 07,01 |+ 0.37 |-+ 0,07 0. 00 24 07.45 19 11.01 56, 44 Ds el COMMS sees oes 30 36.52 |+ 0.16 |-- 0.10 0. 00 30 36.78 25 40. 47 56. 31 Eenipi oA Qiuileene meses 35 05.24 |+ 0.45 |-+ 0.07 0. 00 35 05.76 30 19, 25 56. 51 Be ty, Aquila: ecco. 45 14.57 |+ 0.31 |+ 0.09 0. 00 45 14,97 40 18. 47 56. 50 106 | Go PA Ee eee cemooe 49 36.56 |+ 0.32 |+ 0.09 0. 00 49 36.97 44 40.50 56. 47 E. | e Draconis .-...-.. 19 53 34.15 |— 0.83 |+ 0.28 0.00 |19 53 33.60 |19 48 37.03 | — 4 56.57 ee Ne ee ee ee eee eee NORMAL EQUATIONS. 0=+1.64-+ 7.00 dt + 0.174 a@ =-+08592 0=— 2.85 + 0.17 dt + 4.884 ec xdopted 68.0 410 ASTRONOMY. £ Observations and reductions for time taken at receiving station—Continued. OGDEN, UTAH, SEPTEMBER 7, 1874. a = Name of star. Ts Aa. Bb. Ce. ee AR. AT. a hm. 8. 8. 8. | 8. hm. 8. hem. 8. aes Be ta) Scorpiies-sese-=e 16 26 39.40 |+ 0.66 |— 0.08 |— 0.13 |16 26 39.85 |16 21 42.72 | — 4 57.13 By eeblerculismee-so—- 29 46.66 |+ 0.23 |— 0.19 |— 0.13 29 46. 57 24 49.53 57. 04 BS ee Ophinchi seas. = 35 11.78 |+ 0.51 |— 0.13 |— 0.12 35 12.04 30 14.91 57.13 RY) |e elerculisiese see 41 30.70 |+ 0.12 |— 0.23 |— 0.14 41 30.45 36 33. 46 5. 99 B. | « Ophiuchi-.-.--.-.. 56-40, 92 |+ 0.34 0.18 |— 0.12 56 40.96 51 43.76 57. 20 Wiel'G@— Draconis'==------ 17 13 23.89 |— 0.66 |— 0.22 |+ 0.30 |17 13 23.31 |L7 08 26.03 57.28 W.| 44 Ophiuehi.-.---.. 23 39.13 |+ 0.64 |— 0.05 |+ 0.13 23 39. 85 18 42.63 57. 22 W.|@ Draconis ...-..-.-- 32 33.74 |— 0.20 |— 0.18 |+ 0.20 32 33.56 27 36. 24 7. 32 We tas Ophinchieee-eee- 34 03.62 |4- 0.32 |— 0.11 |+ 0.12 34 03.95 29 06. 83 57.12 Weitz elercolisy--eeece 40 53.00 |— 0.08 — 0.18 |+ 0.17 40 52.91 35 56.10 56. 81 Wo) Wraconisi---sce-: 42 40.08 |— 0.83 |— 0.32 |+ 0.33 42 39. 26 37 42.07 57.19 W.| 2 Herculis ---..---. 46 30.15 |+ 0.17 |— 0.15 |4 0.14 46 30.31 Al 33.22 57. 09 W.| y Draconis -...--.. 58 39.58 |— 0.18 |— 0.42 |+ 0.19 58 39.17 53 42.25 56. 92 W. | 22 Camelop., L. C. --}18 09 55.55 |+ 1.57 |+ 0.23 |— 0.35 |18 09 57.00 |J8 04 59.81 | — 4 57.19 NORMAL EQUATIONS. 0=+1.23+4 14.00 dt4+ 4.04a— 4.85¢ =-+ 02.643 O0=—471+ 4.04 dt+12.27 a+ 15.85¢ c= — 08,120 0=—7.06— 4.85 dé-+ 15.85 a + 38.85 ¢ OGDEN, UTAH, SEPTEMBER 8, 1874. I Name of star. in Aa. Bb. Ce. ie AR. AT. Ss) i 8. 8. 8. ite These Deeds 25 m. 8. W.| « Ophiuchi.-..-..-- = + 0.33 0. 00 0.00 |16 56 41.70 |16 51 43.74 | — 4 57.96 W.| a Herculis’ . 34 |-+ 0.28 | 0.01 |4+ 0.01 17 13 53.62 |17 08 55, 69 57.93 W.| x Herculis --- .72 |+ 0.06 |— 0.02 |+ 0.01 15 38.77 10 40.85 57. 92 W.| 8 Draconis : — 0.19 |— 0.05 |+ 0.01 32 34.29 27 36.20 58. 09 W.| @ Ophiuchi....--..-. 34 04.41 |+ 0.30 |— 0.04 0. 00 34 04, 67 29 06.81 7.86 6 | letrwmley e-so-5 65 40 53.90 |— 0.08 |— 0.06 |— 0.01 40 53.75 35 56. 07 57. 68 E. | @ Draconis...... -- 42 40.97 |— 0.80 |— 0.09 |— 0.01 42 40. 07 37 42.00 58. 07 EB. | Herculis ...-.... 46 31.00 |+ 0.16 |— 0.03 0.00 46 31.13 41 33.20 57. 93 E. | ~! Draconis ..--.. -- 49 10.55 |— 1.05 |— 0.06 |— 0,02 49 09, 42 44 11.30 58. 12 E. | y Draconis ---- ---- 57 40.43 |— 0.17 |— 0.02 |— 0.01 57 40.23 52 42.22 58. OL E. | 22 Camelop., L. C...|18 09 56.53 |+ 1.52 0.00 |-+ 0.01 |18 09 58.06 |18 04 59.89 | — 4 58.17 NORMAL EQUATIONS. O=+ 2.69-+11.00d(+ 0.56a-+4+ 1.34¢ a=- 05.622 O0O=— 7.07+ 0.56 dt + 11.47 a —17.33 ¢ e= — 08.005 O=+11.34+ 1.34 6! — 17.33 a+ 40.18 ¢ FINAL RESULTS OF LONGITUDE, 411 The following tables show the corrections and rates of the chronom- eters used at Cimarron and Ogden: CHRONOMETER AT CIMARRON.—NEeEcus, No. 1344. Deve Local side- | Correction of chro- | Adopted ieee real time. nonieter, hourly rate, 1874, h. hom. 8. 8. Sept. 5 18. 63 — 0 05 32.900 E Sept. 6 23, 35 34.606 | 1 90-0594 Sept. 7 20. 40 52. 010 Sept. 8 110 || — 0 05 54,570 || ty -1036 CHRONOMETER AT OGDEN.—NEGus, No. 1491. Date. Local side- Signals sent from— r) September 6, 1874: Cimarron ..... September 7, 1874: Cimarron - -... ; September 8, 1874: Ogden ......-- } Cimarron ..-.. ; Correction of chro- Adopted real time. nometer. hourly rate. 1874, h. los eile 8. Sept. 6 19. 52 — 0 04 56. 45 + 0.0309 Sept. .7 17.22 57.12 | 7 9: 0358 Sept. 8 17. 64 — 0 04 57.98 ee Final results of longitude. S. '$ Oo ods Mean of sig-| 7; ‘ Sz ae Recorded at— |nalssentand pine ee Ported 52 25 F received. B o 2 ae a SE mane SUT g am A Ss hem. 8: hs Ms 8. hm. 8. TM. 8. Os m. 8 Cimarron ......|10 44 32.50 |—0 05 35.28 |10 38 57. 22 Ogden) => ----=- 10 15 34.24 |—0 04 56.90 |10 10 37.34 | 28 19.88 Cimarron..-.... 10 48 15.16 |—0 05 35.28 |10 42 39.88 Opden!==------ 10 19 17.24 |—0 04 56.90 /10 14 20.34 19,54 | 0.34 | 28 19.710 Cimarron...... 20 26 48. 62-/—0 05 52.00 |20 20 56. 62 Opdenteeee-—-- 19 57 34.02 |—O 04 57.20 |19 52 36.82 19. 80 Cimarron===--- 20 30 30.00 |—0 05 52.01 |20 24 37.99 Ogden ...----.|20 01 15.66 |—0 04 57.21 19 56 18.45 19.54 | 0.26 19. 670 Cimarron....-. 20 04 49.28 |—0 05 54.46 |19 58 54. 82 Ogden ....---- 19 35 33.04 |—0 04 58.05 |19 30 34.99 19. 83 Cimarron...---. 20 11 03.85 |—0 05 54.47 |20 05 09.38 Ogden .......- 19 41 47.78 |—0 04 58.05 |19 36 49.73 | 28 19.65 | 0.18 | 28 19.740 Cimarron east of Ogden Ob 28m 198.707 + 08.014. Or,7° 04/ 55.60 + 0.21. 412 ASTRONOMY. : Observations and computations for latitude. CIMARRON, NEW MEXICO. Level. Corrections, No. of | Microm. |————— Half-sum of A Date. star. | readings. Remarks. declination. Micron EG N. Ss. and rete Level. 1874. Ths d. d. d. fe} ‘ a“ / “ “4 [o} / “ August 31 ....| 6940 5 86.0 | 20.3 | 24.6 | S. W. wind. 36 29 11.7 |+ 0 56.6 |+2.9 | 36 3011.2 6943 | 10 42.9 | 20.5 | 24.0 26 17.3 |4+ 3 52.7 |43.1 13.1 6962 4 39.2 | 31.0 | 14.0 6997 0 51.0 | 29.8 | 15.0 7006 | 16 52.0] 9.0] 35.8 40 28.4 |—10 17.0 |2.8 08. 6 7065 7 27.0 | 29.6 | 15.8 7098 9 54.1 | 27.3 | 17.8 31 33.0 |— 1 27.5 |+5.4 10.9 7137 | 10 21.0 | 26.8 | 18.9 7176 6 81.0 | 32.0 | 13.3 27 53.7 |4+ 2 11.1 |+6.2 ee 7200 | 13 40.3 | 20.3 | 25.2 7215 4 09.9 | 30.0 | 15.7 24 10.4 |+ 5 58.7 |+2.2 1e3 7233 | 13 42.0 | 21.2 | 24.6 7256 2 94.0 | 9.3 | 37.0 36 59.4 |— 6 44.0 |—7.2 08.2. 7333 | 10 87.5 | 27.0 | 20.3 34 18.5 |— 4 09.3 |+2.6 11.8 7368 4 41.0 } 25.7 | 21.3 7402 | 10 41.1 | 22.8 | 23.5 34 01.4 |— 3 51.4 |+0.9 10.9 7455 | 13 50.0 | 31.3 | 15.0 7461 2 74.5 | 11.8 | 35.3 37 06.3 |— 6 53.6 |—1.7 11.0 7520 7 05.3 | 27.9 | 18.3 7555 9 54.9 | 18.0 | 28.0 31 46.2 |— 1 36.2 |-0.1 09.9 7606 | 15 71.0 | 18.0 | 28.0 7643 2 52.9 | 37.0 | 8&7 21 40.4 |+ 8 28,2 |+4,2 12.8 7742 8 33.9 | 23.2 | 23.0 7749 8 49.8 | 31.0 | 15.3 30 13.6 |— 0 06.5 |+3.7 10.8 7833 8 67.1 | 33.9 | 13.7 7837 7 57.5 | 10.4 | 36.9 29 27.4 |4+ 0 42.2 |—1.5 03.1 7857 | 14 80.9 | 20.3 | 26.8 7884 2 38.1 | 17.3 | 30.7 38 10.5 |— 7 59.0 |—1.6 09. 9 7902 | 10 29.9 | 20.8 | 26.8 7908 5 47.1 | 17.3 | 30.7 33 19.3 |— 3 06.2 |—4.5 08. 6 7958 | 11 24.3 | 26.8 | 21.0 7995 | 11 27.1 | 28,2 | 19.0 30 08.2 | — 0 01.1 [43.5 10.6 8020 | 10 96.5 | 26.0 | 21.3 8048 4 24.5 | 29.8 | 17.8 25 46.1 |4+ 4 19.2 |4+3.9 09. 2 8058 | 12 84.0 | 21.3 | 26.0 8091 8 42.1 | 33.0 | 14.9 32 57.6 |— 2 50.3 |+3.1 10.4 8097 0 13.0 | 33.9 | 14.0 38 14.5 |— 8 10.0 |+3.5 03. 0 8128 12 06.1 | 29.0 | 18.4 38156 LL et) 9.0 | 39.0 37 01.1 |— 6 46.4 |—4.5 10,2 8159 8 35.3 9.0 | 39.0 36 32 39.4 |— 2 22.9 |—4.5 | 36 30 12. LATITUDE DETERMINATIONS. 413 Observations and computations—Continued. CIMARRON, NEW MEXICO. Level. No. of | Microm. z Date. star. | readings. Remarks. N. s 1874. td. d. d. August 31....| 8171 5 13.2 | 24.0 | 23.5 8206 | 12 14.8 | 28.5 | 19.2 September 4..| 6895 8 62.6 | 15.0 | 27.0 | No wind. 6912 8 23.7 | 28.0 | 14.5 6940 5 09.8 | 27.0 | 14.8 6943 9 65.0 | 27.8 | 14.0 6962 3 61.7 | 13.9 | 28.0 7065 6 35.9 | 21.3 | 20.8 7098 8 56.0 | 22.3 | 19.7 7137 9 32.0 | 21.5 | 20.1 7176 5 87.0 | 24.0 | 18.5 7200 | 12 00.3 | 34.4] 7.8 7215 2 66.3 | 6.5 | 35.7 7233 | 13 87.2 | 22.7 | 19.0 7256 3 22.8 | 17.9 | 24.0 7333 | 10 17.9 | 11.8 | 31.0 7368 3 70.0 | 31.7 | 12.0 7402 9 73.2 | 10.0 | 34.0 7455 | 13 18.0 | 34.2] 9.8 7461 2 34.2 | 10.0 | 34.0 7520 5 64.7 | 26.2 | 17.8 7595 8 15.9 | 17.3 | 27.0 7606 | 14 23.7 | 13.8 | 30.2 7643 1 11.0 | 37.0] 7.6 7676 | 16 75.1 | 13.2 | 31.0 7712 |— 0 42.8 | 32.9 | 11.7 7742 7 18.1 | 16.0 | 28.3 7749 7 37.0 | 33.6 | 10.8 7857 | 14 15.1 | 26.0 | 18.9- 7884 1 69.0 | 17.0 | 28.4. 7902 9 97.7 | 33.2 | 11.8 7908-| 5 01.5 | 14.8 | 30.3 7958 | 10 21.0 | 33.0 | 12.3 7995 | 10 23.5 | 12.9 | 32.8 6020 | 10 46.6 | 17.9 | 27.3 8048 3 73.8 | 33.3 | 12.0 8058 |} 11 97.0 | 30.3 | 14.7 8091 7 59.2 | 16.0 | 29.7 8097 — 0 67.0 | 16.9 | 29.0 Half-sum of declination. Corrections. Latitude. Microm. and refr. Level. “ “ oj “ + 4 30.5 |42.3 | 36 30 12.4 — 0 15.0 |40.3 09.5 + 0 57.1 |-0.4 09.1 + 3 52.5 |-0.1 10.5 — 1 24.8 |+0.7 09. 6 + 2 13.0 |41.8 09.4 + 6 00.1 |—0.6 10.8 — 6 50.3 |—0.5 09.5 — 4 09.8 |40.1 09.8 — 3 52.5 |-1.0 08. 9 — 6 57.8 |+0.1 09.5 — 1 36.8 —0.3 10.1 +- 8 26.1 |+3.0 10.4 —11 02.2 |+0.8 09. 6 — 0 07.3 |42.4 09.8 — 8 00.3 |—1.0 10.1 — 3 11.2 41.4 10.5 — 0 01.0 40.2 08.5 + 4 19.4 }42.8 09.3 — 2 48.7 |40.4 10.5 — 8 07.3 +0.8 | 35 30 09.1 414 Date. No. of star. 1874. September 4.. September 5-- 8128 8156 8159 8171 8206 6895 6912 6940 6943 6962 7065 7098 7137 7176 7200 7215 7233 7256 7333 7368 7402 7455 7461 7520 7559 7606 7643 7676 7712 7742 7749 7833 7837 7857 7884 7902 7908 7958 7995 _ Om NYOors: o© OD woo CO Rem Om OCOD COS _ _ OD CHO SS Ww je) =. ww Onno Fw WH BH g 5 Neishs RKO OF FW CO OFWM own ow on own CO OF _ Ko Rw FW of we oo oo wo oo ASTRONOMY. - Observations and computations—Continued. CIMARRON, NEW MEXICO. Level. Corrections. Half-sum of . Remarks. declination! ae Latitude. s. and rete Level. d. fe} i “l i “ “l O° f “a 10.3 34.3 36 37 02.1 |— 6 52.0 |40.4 | 36 3010.5 34.3 32 40.6 |— 2 29.9 |40.4 Hest 28.2 13.6 25 40.7 |-+ 4 28.1 |41.8 10.6 15.0 23.5 30 24.3 |— 0 13.4 |—0.4 10.5 ees 29 12.6 |+ 1 01.7 |—2.9 11.4 eae 26 18.3 |+ 3 55.1 |-2.5 10.6 46.0 27.0 2.3 31 34.0 |— 1 26.8 |4+3.4 10.6 20.7 4.0 27 54.7 |4+ 2 09.7 |+5.6 10.0 15.7 19.5 24 11.4 |4 5 57.7 140.6 09.7 8.2 32.3 37 00.5 |— 6 50.4 |—2.0 08. 1 oes 34 19.8 |— 4 08.2 |-2.7 02.9 36.7 34 02.6 |— 3 52.2 |-1.6 038.8 28.7 14.0 37 07.5 |— 6 57.1 |-2.2 08. 2 27.0 7.0 31 47.4 |— 1 39.8 |42.1 09.7 35.7 0.7 21 41.6 |+ 8 27.8 |+1.4 10.8 21.0 Pa 41 11.2 |—11 01.5 1.4 08. 3 4.7 34.0 30 14.9 |— 0 05.8 |40.1 09. 2 20.0 4 14.4 29 28.6 |4+ 0 37.0 |42.8 03.4 32.0 7.8 38 11.6 |— 8 01.3] 0.0 1053 20.3 24.0 33 20.5 |— 3 09.2 |—2.1 69,2 22.2 15. 2 36 30 09.5 |— 0 01.9 141.3 1.36 30 08.9 LATITUDE DETERMINATIONS. 415 Observations and computations—Continued. CIMARRON, NEW MEXICO. Level. | Corrections. No. of | Microm. Half-sum of : Bs star. | readings. Remarks. declination.| yFiorom Latiide. N. 8. marirete Level. 1874. tas d. d. ee ee Se UY eal Ko) September 5..| 8020] 10 70.1 | 18.7 | 21.2 8048 3 94.2 | 25.3 | 15.0 36 25 47.4 |-+ 4 20.6 |+1.8 | 36 30 09.8 8058 | 12 88.6] 31.0} 9.0 8091. 8 52.2] 9.0} 32.0 82 59.0 |— 2 48,2 0.2 10.6 8128 | 11 61.1 | 19.6 | 20.8 8156 0 91.2 | 21.0 | 20.0 37 02.4 |— 6 52.4 | 0.0 10.0 8159 7 73.1 | 28.8 | 20.0 32 40.9 |— 2 29.5 |—0.1 11.3 8171 3 50.3 | 15.1 | 24.7 8206 |} 10 52.5 | 21.2 | 18.9 36 25 41.0 |+ 4 30.7 |—1.7 | 36 30 10.0 ASTRONOMICAL CO-ORDINATES OF CIMARRON, NEW MEXICO. Longitude... ..6% 59™ 39.936 + 08.014 or 104° 54! 59.04 + 0.21 west from Greenwich. Longitude....1" 51™ 27°.815 + 08.014 or 27° 51! 57.24 + 0.20 west from U. S. Naval Observatory, Wash- : ington, D.C. Latitude ..... 36° 30/ 10”.01 + 0”.09 north. U. S. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN. ist Lizut. GEO. M. WHEELER, Corps or ENGINEERS, U. S. ARMY, IN CHARGE. RESULTS OBSERVATIONS MADE BY DR. F. KAMPF AND JOHN H. CLARK IN THE DETERMINATION OF THE ASTRONOMICAL CO-ORDINATES OF SIDNEY BARRACKS, NEBRASKA. SEASON OF 1874. COMPUTATIONS BY Dr. F. KAMPF. 27 AST 417 ate a4 Y = = & x — = 4 ey an — : 3 * * if (5 ke See Tee oof 2 New, 7 is WTHil-tpee BE pF i} tT) eee 1} * = ~< * : iy - q —_ SIDNEY BARRACKS, NEBR. GEOGRAPHICAL POSITION OF STATION. Longitude, . » . » » » 102° 58! 13.32 + 0.45 west from Greenwich. Latitude,. . . » . . . 41° 08! 36.75 + 0.05 north. Barometric altitude of observatory above sea-level (from railroad surveys), 4,073.0 feet. The astronomical station was located in the parade-ground of the mili- tary post. Two thousand feet from the barracks is the railway-station of Sidney, a town of about five hundred inhabitants. It is traversed by the Union Pacific Railroad, and has an east and west extension along that line. The surrounding country is a prairie, very nearly level. Only in the north- west is the plain broken by hills, and these are few in number and incon- siderable in height, not. rising above 500 feet. South of the station, two miles away, is the Platte River. METEOROLOGICAL CONDITIONS. With the exception of one night, on which a heavy wind made it im- possible to accomplish satisfactory work, the weather was very favorable during the entire time of observations at this point. The temperature was low in the night-time, being generally below 40° I*. at 2 o’clock a. m. OBSERVATORY.—INSTRUMENTS.—INSTRUMENTAL VALUES. These were the same as at Las Vegas, in the report upon which station they are described and discussed in full. The line of the Western Union Telegraph Company was.used. The length of circuit to Ogden, the connected station, was about 600 miles. In the transmission of signals the local battery in the office at Sidney was employed, and this was assisted by a repeater at Cheyenne. Thanks are due to General Morrow, in command of the post, for his assistance in constructing the tent and station, and for his ready co-opera- tion during the whole time of observations. 419 420 ASTRONOMY. CONNECTIONS.—OBSERVERS.—COMPUTERS. Dr. F. Kampf was the observer at Sidney, and Mr. John H. Clark at Ogden, the connected station. All observations for time and the exchange of signals were made by sound. ‘Transmission of signals took place September 23, 24, 25, 26, and 27; observations for latitude were made September 24, 26, and 27. All computations were made by Dr. Kampf in the office. Tabulation of stars used for determination of time at Sidney Barracks, Nebraska, and Ogden, Utah, 1874. SIDNEY SIDNEY . BARKACES. | OGDEN: Barracks. | OGDEN: Name of star. SIR IRIAN [RI IR RIN Name of star. S/R IR RIN IR IRIS 3|5/5|S|5/5/9|s|518 G/5/5|5/3/5/3/2|3/5 Lj2 (2/2/22 /2/e/2\|ai2 @2|2j/O/6j2/5/2/2/2/2 ETE eel FENIENE BBEENEIE! SIS|S/SIS IS |S/S/218 SIS (2S /SiSi2/s12)8 Blealelcleteyelalsls S\elelelelelslele) a. ODD DIO/Ml/O/O' Dj Dolo DIDID/CIVDia|/odI di aio PD |2|w ||| wD|2 | 2 |22 92 122 122 |op | |p |a2 | # Herculis..---. ROASOAE =3|loc||so|[eo|leciieellea|lee|focl|h? CYB cosnes sonse doce <<|[52)Px4))521 | lo=|eo)|es||ss|lon VD TACOnISsess= =e sees =2|=4{]55|[5a))44]5<|[sel}ajls= Groombr. 3241 ...---. Selles|Ibel Gel lbal ei esl eisai 7? Sapittarit.-----...--- BallsallAs|Isallsa|S --|--|--|X|<]--|X|--]] 0? Ursse Majoris, L. C. ..|-.|- =|ee|-=|--|--1< 50) Draconisseeccesee ees cole aallsallaci IP7 Aquile.---...-.. 39 01.04 |+ 0.98 |— 0.33 |— 0.97 39 01. 04 40 18.21 Te ey 106 |).@ AGE) oe seco. 43 23.22 |+ 1.02 |— 0.36 |— 0.96 43 22.92 44 40,24 17. 52 E. | e¢ ‘Draconis ------- 47 25.40 |— 2.66 |— 1.18 |— 2.7 47 15.78 48 35.94 7.16 We |e Aquilae eee ee 56 42.12 |4+ 1.08 |+ 0.07 |+ 0.96 56 44. 23 58 01. 27 7.04 Wri) eAquilsresc-. --- 20 03 31.16 |-+ 1.26 |4+ 0.07 |-+ 0.95 }20 03 33.44 [20 04 50.55 Agel W..| 3lo'Cygni-. --.. .--. 08 23.26 |— 0.24 |+ 0.08 |+ 1.338 08 24. 48 09 41.48 17. 00 W.|« Cephei---..-:.. 11 49.40 |— 5.08 |+ 0.07 |+ 4.34 11 48.73 13 05.91 17.18 W.| y = Cygni. ..-.----.|/20 16 25.62 |+ 0.06 |— 0.04 |+ 1.24 |20 16 26.88 |20 17 44.21 | + 1 17.33 NORMAL EQUATIONS. O= + 10.85 + 11.00 dt— 113a— 0.68¢ O=—13.86— 1.13dt-+1127a+ 8.80c 0= +4 22.68— 0.63dt-+ 8.80a-+ 41.89 0 a—=-+ 18.887 ce = — 08,952 TIME DETERMINATIONS. 423 Observations and reductions for time taken at sending station—Continued. SIDNEY BARRACKS, NEBRASKA, SEPTEMBER 26, 1874. a EI Name of star. T. Aa. Bb. Ce. MEE AR. AT. 5 hom 8 8. By 8. hom. 8 hom 8 m. 8 W.|6 Draconis ------ 19 11 12.12 |4+ 0.13 |— 0.14 |} 2. 18 /19 11 14.29 |19 12 31.62) + 1 1%. 33 W.|7 #£Draconis ..---- 16 37.53 |+ 0.21 |— 0.23 |4+ 2.88 16 40.39 17 57.69 17.30 W.| 6 Cygni --------- 94 21.80 |— 0.03 |— 0.11 |4+ 0.95 24 22.61 25 40.13 17. 52 W.|« gg =} = Groombr. 3241- .. Delphini -..----. Cyenigese==- tre eRoraR > 2 =] 5 q =} (il Ciao ooseo5sess S44Serhee Sere edasae hm. 38. 19 05 05.27 15 43.81 18 00. 91 23 28.31 31 06.82 35 35. 04 45 44 63 50 06. 61 19 54 05, 92 20 36 02.75 39 16,23 42 37.46 46 20.53 51 20.72 57 57.79 21 06 44.57 13 03.72 21 15 14.95 r 8. 18 38 08.45 |-+ 0.10 |— 0.09 NORMAL EQUATIONS. First series. O=-+ 7.224 12.00d1— 2.85a4 6.75¢ 0=—23.74— 2.85 dt+13.76a— 2.32 0=—+10.12+4+ 6.75dt— 2.32a+52.39¢ 0=— 0.53 Second series. 00 dt-+0.64G-+4+ 2.740 +9. 0=—4.87 + 0.64 dt + 4.29a— 3.94¢ +2. 0—+6.10 74 dt —3.94a + 21.97 ai HOW VEE ERP wweReow Aa. Bb. Ce. 3 8 + 0. 50 53.93 |+ 0.29 |— 0.09 |+ 0. 54 55. 42 |— 3.69 |— 0.29 |+ 0. + 0.81 |— 0.08 |+ 0. 4 1,54 [4+ 0.01 | 0. BE 7.68 (Ee OGD |= © — 3.05 0.00 |j— 0. 4 0.45 |— 0.02 |- 0. AE hoa |= 0,03 |= @ + 0.87 |~ 0.05 | 0. + 0.90 |— 0.06 |— 0. — 2.35 |— 0.28 |— 0. — 1.74 |— 0.31 |— 0. ree |S aiks =o) — 0.10 |— 0.21 |— 0. + 0.82 | 0.10 |— 0. JE Od |= O11) | @. + 0.01 |— 0.12 |4 0. + 0.07 |— 0.18 |4+ 0. + 0.24 | 0.19 |4 0. + 0.07 |— 0.21 |4+ 0. BERR OO RPoOomwnwuony wood OCOFMORrRODROCWNW Te > Bs hm 8 hm 38. 18 38 08.59 /18 32 41.55 50 54.25 45 27.06 54 51.83 49 24.68 19 05 06.10 59 38.84 15 45.25 |19 10 18.09 18 58.74 13 31.62 23 24.92 17 57.69 31 07.14 25 40.13 35 36.19 30 08.98 45 45.34 40 18.20 50 07.35 44 40.22 19 54 03.00 |19 48 35.88 20 36 00.40 20 30 33.13 39 16, 46 33 49. 40 42 37.02 37 10.02 46 21.16 40 53.91 51 21.35 45 54.03 57 57.80 52 30.53 21 06 44.58 |21 01 17.38 13 03. 87 07 36.63 21 15 14.92 |21 09 47.85 a=-+ 15.678 e=— 05.100 a=-t 1%.050 c=— 02.091 TIME DETERMINATIONS. 427 Observations and reductions for time taken at receiving station—Continued. OGDEN, UTAH, SEPTEMBER 27, 1873. a EI Name of star. dhs Aa. Bb. Ce. Lue A a Rem. 8s 8. 8. oe ORY ath h. m. W.| 50 Draconis --..-.../18 55 56.02 |— 2,84 0.00 |-+ 0.41 18 55 58,59 |18 50 \WVGAG BNO Eyes oeenar 19 05 07.02 |+ 0.62 0.00 |+ 0.11 |19 05 07.75 59 W.| d Sagittarii --.---. 15 45.71 |+ 1.19 |— 0.01 |+ 0.11 15 47.00 |19 10 W.| 6 18 01.49 |— 1.49 |— 0.04 |+ 0,27 18 00.23 12 W.| 7 23 28.39 |— 2.35 |— 0.08 |+ 0.36 23 26.32 17 E. | 6 31 08.52 |+ 0.35 |+ 0.08 |— 0.12 31 08.83 25 E. | « 35 36.99 |-- 0.98 |+ 0.04 |\— 0.11 35 37.90 30 E. | y 45 46.40 |+ 0.67 |+ 0.06 |— 0.11 45 47, 02 40 E. | a 50 08.36 |+ 0.70 |-+ 0.06 |— 0.10 50 09. 02 44 E. | € 54 06.72 |— 1.81 |+ 0.20 |— 0.31 54 04.80 48 E. | y Sagittarii ...--- 58 39.44 |+ 0.52 |+ 0.08 |— 0,11 58 39.93 53 Ide ee ZAG ri ey Se coon 20 03 29.36 |+ 0.73 |-+ 0.07 |— 0.10 |20 03 30.06 58 E. | 3 Urse Maj. L.C ..)20 05 43.00 |+ 3.36 |— 0.09 |+ 0.29 |20 05 46.56 [20 00 E. Groombr. 3241. ../20 87 04.27 |— 1.98 |+ 0.11 |— 0.38 |20 37 02. 02 [20 31 188 Ie 39 17.62 |+ 0.53 |+ 0.04 |— 0.12 39 18 07 33 E. |} a 42 38.98 |— 0.12 |+ 0.06 |— 0.16 42 38 76 37 E. | ¢ 46 21.80 |+ 0.94 |+ 0.02 |— 0.12 46 22.64 40 E. | pz 51 22.12 |4+ 0.94 |+ 0.02 — 0.12 51 22.96 45 W.| v 57 59.13 |+ 0.01 |+ 0.09 /+ 0.15 57 59. 38 52 W. |} o2 Tees Ma L.C ../21 04 45.06 |+ 2.96 |— 0.06 |— 0.31 |21 04 47.65 59 Wr oliGyoni) 5-52. 06 45.98 |+ 0.08 |-+ 0.09 |+ 0.15 06 46.30 /21 01 W.|¢ Cygni ...--...../21 13 05.08 |+ 0.27 |+ 0.08 |+ 0.13 |21 13 05.56 |21 07 NORMAL EQUATIONS. First series. O=-+ 1.93-+ 13.00 dt+ 049a— 5.68¢ a=- 18.292 0=— 26.12-+ 0.49 dt4+ 20.97a+. 8.32¢ e=— 08,105 0=— 5.79— 5.68dt+ 832a+59.10¢ Second series. O=— 2.24+9.00dt+ 3.06a+ 6.63¢ a=-+ 18,188 0 =— 11.93 + 3.06 dt+10.49a+ 2.70¢ c=— 05.116 O=-+ 0.42 + 6.63 dt-+ 2.70 a + 27.306 R. 33. 06 49, 39 10. 00 53. 90 54. 02 30. 51 18. 67 17.36 36, 62 The following tables show the corrections and rates of the chronom- eters used at Sidney Barracks and Ogden: CHRONOMETER AT SIDNEY BARRACKS.—Neaus, No. 1344. Date. Local sidereal | Correction of chro- | Adopted hourly time. nometer. rate. h. h. m. 8. 8. 21.15 +0 01 17,240 19. 43 17.160 Hees 19.70 17. 160 0. 000 19.70 17. 540 c 19.70 + 0,040 +0 O01 16.220 428 Signals sent from— ASTRONOMY. CHRONOMETER AT OGDEN.—Nzcus, No. 1491. Date. Local sidereal September 23, 1874: Sidney Barracks ; September 24, 1874: Sidney Barracks ; September 25, 1874: Sidney Barracks ; September 26, 1874: Sidney Barracks ; September 27, 1874: time. nometer. 1874, h. h. m. 3. Sept. 23 19.75 — 0 05 22.168 Sept. 24 19. 30 23. 720 Sept. 25 20. 12 25. 145 Sept. 26 20. 00 27.110 Sept. 27 20. 10 — 0 05 28.855 Correction of chro- Final results of longitude. Recorded at— Sidney Barracks - Ogden Sidney Barracks - Ogden Sidney Barracks Ogden Sidney Barracks - Ogden Sidney Barracks - Ogden Sidney Barracks - Ogden Sidney Barracks - Ogden Sidney Barracks - Ogden Sidney Barracks - Ordeneessaee—- Sidney Barracks . Ogden Mean ofsig- |p: -COoTrec- nalssent and ae ec received. ss hm. 8. him. 18: 20 26 51.56/-++-0 01 17.25 19 57 24.14|—0 05 22.17 20 30 50.11/+0 01 17.25 20 01 22.72\—0 05 22.18) 20 31 49.22/+-0 01 17.16 20 02 23.350 05 23.76 20 35 30.03/4+0 01 17.16 20 06 04.21/—0 05 23.76 20 46 16.97/-++0 01 17.16 20 16 52. 36|/—0 05 25. 15) 20 49 50.10/-++0 01 17.16 20 20 25. 58}—0 05 25, 15 20 52 06.19/-++0 01 17.34 20 22 44.04,—0 05 27.19 20 56 00. 21/-+-0 01 17.34 20 26 38. 14|—0 05 27.19) 20 41 41.03/+-0 01 16.18 20 12 19.36|\—0 05 28.85 20 45 20.11)-+-0 01 16.18 20 15 58.52/—0 05 28.86 Adopted hourly rate. % + 0.065 + 0.059 - -+ 0.084 + 0.070 3 Oo a lle sz |e Corrected as a Es 5 Os 2 time. BED ayen| ae |2 ay Ke lire Gs Ba |i 8 20 28 08. 81 19 52 01.97] 36 06,84 20 32 07.36 19 56 00.54 06. 82} 0. 02 20 33 06.38 19 56 59.59 06.79 20 36 47.19 20 00 40, 45 06. 74) 0. 05 20 47 34.13 20 11 27.21 06. 9: 20 51 07. 26 20 15 00. 43 06. 83} 0. 09 20 53 23.53 20 17 16.85) 06. 68 20 57 17.55 20 21 10.95 06. 60) 0.08 20 42 57.21 20 06 50.51 06. 70 20 46 36. 29) 20 10 29.66} 36 06. 63} 0.07 04 36™ 068.755 + 08.030 Or, 9° 01’ 417.32 + 0.45 Means. 36 06. 830 36 06, 665 LATITUDE DETERMINATIONS. 429 Observations and computations. SIDNEY BARRACKS, NEBRASKA. Level. Corrections. No.of} Microm. |——~———- Half-sum of ei Date. | star. | readings. Remarks. —_| geclination. MMicrone ; Latitude. N. 8. aaretis Level.|Merid. 1874. iS Gk d. d eo fF) " i The u“ “ (oy I 7 Sept. 24 | 7706 7 55.9 | 30.0] 80] Heavy wind 7749 909.0} 3.7 | 34.5 from south- | 41 09 37.6 |— 0 59.0 |—2.0 ]...... 41 08 36.6 west; cloudy. 7824 | 15 49.8 | 28.3] 8.7 | 95: p.m. 7843 BONO || Ge! |) Ba 16 37.6 |— 8 01.4 |—1.2 |4+0.1 35.1 7856 So lat |) GO|) Pale 7902 | 14 52.0 | 18.0 | 20.0 15 38.0 |— 7 00.4 |—1.7 |....-. 32.9 7917 | 14 94.0 | 10.2 | 27.9 7932 4 21.0 | 24.0 | 14.0 01 43.5 |+ 6 53.7 |—1.8 |...-.. 35.4 7962 | 10 23.6 | 25.0 | 12.3 05 34.2 |+ 3 01.4 |—1.1 |}.-.--. 34.5 7972 8 69.8 | 16.0 | 22.0 7984 5 35.6 | 18.3 | 20.0 10 45.9 |— 2 08.8 |-1.8 ]...... 35.3 7994 | —1 60.7 | 20.0 | 18.0 8023 | 12 55.1] 9.0] 29.0 17 44,2 |— 9 05.8 |—4.2 | ..... 34,2 8106 | 12 65.0 | 21.5 | 17.0 08 16.3 |-+ 0 22.2 |—4.3 |...... 34, 2 8173 2 84.9 | 21.3 | 17. 02 00.2 |+ 6 40.1 |—4.5 }...... 35.6 8182 | 13 22.5] 8.0] 31.0 8195 | 12 16.7 | 22.7 | 15.9 8223 | 12 03.9] 6.6 | 32.3 08 36.5 |-+ 0 04.9 |—4.4 |...-.. 37.0 8237 7 SEG) Gh@) || Ser 05 43.8 |-+ 2 58.3 |—4.7 |.----- 37.4 8268 6 95.9) 15.8 | 23.5 12 02.6 |— 3 22.3 |—2.5 |..--.. 37.8 8282 | 21 57.8 | 15.5 | 23.8 21 25.4 |—12 45.8 |—2.6 |....-- 37.0 8324 Ty Alses |) ike5e3 \) Wie} 16 | 18 19.9 | 17.3 | 22.9 | No wind now. 67 1 26.1 | 16.3-] 24.7 | Clear. 19 32.5 |—10 53.0 |—3.2 |...--- 36.3 100} 11 05.1 | 25.1 | 14.9 14 13.4 |— 5 33.1 |—4.2 |..---- 36.1 152 | 15 52.0 | 24.0 | 17.0 17 05.2 |— 8 25.4 |—5.0 |.----. 34.8 173 241.0] 6.3 | 34.8 215 | 13 70.0 | 17.7 | 23.0 254 4 44,9 | 17.0 | 24.0 02 43.6 |+ 5 56.7 |—2.9 |..---. 37.4 283 | 13 46.9 | 22.4 | 18.8 337 399.0] 7.3 | 34.0 ; 02 37.3 |+ 6 05.4 |—5.4 |.----- 37.3 368 4 38.0 | 27.0 | 13.9 387 | 13 89.0] 0.0} 41.0 14 50.9 |— 6 05.6 |—6.5 |.-..--- 37.8 412 3 25.0 | 13.7 | 26.9 05 16.0 |+ 3 28.3 |—4.9 |....-. 39.4 444] 16 76.0 | 12.2 | 28.0 13 55.4 |— 5 12.3 |—5.4 |..---. Briar! 453 8 65.5 | 16.0 | 24.0 487 | 17 67.5 | 33.0] 6.9 516 2 86.6] 1.0] 39.0 18 11.8 |— 9 30.9 |-2.8}...--. 38.1 540 6 61.1 | 21.0} 19.2 576 | 14 64.2} 9.3) 31.8 41 03 31.8 |+ 5 09.6 |—4.8 |...-.. 41 08 36.6 430 Date. 1874. Sept. 24 Sept. 26 star. No. of| Microm. readings. = i=) jor) oS oe > WOW CH CW SCH BO ORO COPY fo) S208 SK paw Fane nen eae SHIGE Aon Go ANG Ooo 20 © oO ej) iia) > ) = oo ASTRONOMY. Observations and computations—Continued. SIDNEY BARRACKS, NEBRASKA. Level. | 2 Pra % 5 oor coo _ wo BE TUNE a Dey eS oO acon ww 2 aus? CoE RPI CO WH wo ae ie ao ow$o = Bag Ss Acc oF (CS) lie SS ices 0 (oor) ao DMmow oan o 20 ow Remarks. ww SNe eww Sees 3 8 3 Te 4 Wind moderate. 0 0 8 Corrections. Half-sum of 7 declination.| 4... Latitude. Microm. Level.|Merid and refr. x ‘ (o) / a“ / “a “l “ (oy elf “a 41 06 44.8 |+ 1 49.4 |—4.5 }..--.. 41 08(29.7) 04 49.0 |+ 3 55.0 |—4.7 |------ 39.3 11 59.1 |— 3 17.0 |—3.5 }.----. 38.6 10 33.5 |— 1 52.8 3D. 2 06 24.2 |-4+ 2 19.2 37.5 09 37.9 |— 1 02.6 |+0.4 |.-.---. 30.7 11 52.0 |— 3 15.4 |41.3 |.----. 37.9 16 38.0 |— 8 03.5 |--0.6 |.----. 25. 1 15 38.4 |— 7 02.2 |+0.7 | ----- 36.9 01 44.0 |4+ 5 52.2 |40.2 |...... 36.4 05 34.7 |+ 3 01.2 |+0.4 |-..--. 36.3 04 34.1 |+ 4 02.1 |—0.4 |.----- 35. 8 10 46.4 |— 2 12.6 |+0.9 |-.----- 34.7 17 44.7 |— 9 09.1 |—0.1 |.----. 35.5 08 16.7 |+ 0 18.5 |41.6 |.----- 36.8 02 00.7 |4+ 6 36.5 [40.7 |------ 37.9 08 37.0 |— 0 00.7 |-+-0.6 |------ 36.9 05 44.4 |+ 2 52.2 |—0.1 |.----- 36.5 12 03.1 |— 3 26.4 |+-1.0 |.----. bY Ap: 21 26.1 |—12 50.2 |/+0.9 |-.----- 36.8 19 33.4 |—10 57.8 |+1.2 |..---. 36.8 14 13.8 |— 5 37.4 |+1.0 |.-.---. 37.4 17 05.8 |— 8 29.4 |+0.7 |..---. 37.1 41 02 44.1 I+ 5 53.5 [41.1 [...--. 41 08 38.7 LATITUDE DETERMINATIONS. Observations and computations—Continued. SIDNEY BARRACKS, NEBRASKA. 431 No. of Date. ie, 1874, Sept. 26] 283 337 368 387 412 444 453 487 513 540 576 600 629 647 658 666 691 715 731 Sept. 27 | 7706 7749 7759 7807 7824 7843 7856 7902 7917 7932 7962 7972 7984 7994 8023 8106 8173 2182 8195 8223 8237 Level. Corrections. Microm. Half-sum of . readings. ES ONIES declination. | yr;or0m. ; eae, Ss. Ponal ntie. Level.|Merid. ae d. d. d. (o) / ua f! uw a Ww [o} t “ 13 18.0 | 20.0 | 18.4 3 86.5 | 19.8 | 19.0 Al 02 37.8 |+ 5 59.1 |+0.6 |.-.-.. 41 08 37.5 4 44.0] 29.5] 8.9 14 12.4] 81] 30.5 14 51.3 |— 6 13.3 |—0.4 |..--.. 37.6 4 03.0 | 10.0 | 28.0 05 16.4 |4+ 3 20.7 |+0.4 |...--. 37.5 17 52.5 | 10.3 | 28.6 13 55.9 |— 5 19.5 |+0.3 |...... 36.7 9 23.7 | 29.4] 9.8 1697350))) L700) 2155 181.9) | 23:7 | 15.5 18 12.3 |— 9 34.8 |40.9 |.-.... 38. 4 6 79.2 | 23.4 | 15.7 14 64.3 | 19.7 | 20.0 03 32.3 I+ 5 02.6 41.7 |...... 36.6 711.9 41.9 SEE) |] SES) ease 06 45.2 + 1 44.5 |4+0.9 |....-. (30.6) 16 89.2 19.7 04 49.5 |+ 3 49.8 |—0.9 |.----. 38. 4 10 93.0 21.9 by Yala) Win) 11 59.5 |— 3 21.2] 0.0].----- 38.3 7 77.0 13.0 10 81.2 26.2 10 34,0 |— 1 57.3 |+-0.4 |...-.. 37.1 4 31.1 26.8 06 24.6 |+ 2 13.3 |+0.2 |...--- 38. 1 7 90.4 21.5 9 45.0 19.8 09 38.1 |— 0 59.6 |—2.1 |.----- 36. 4 12 62.0 26. 4 7 61.9 16.1 11 52.2 |— 3 12.8 |-2.4 ]...-.. 37.0 15 59.3 37.0 3 10.0 igi 16 38.3 |— 8 01.6 |—0.8 |..--.. 35.9 3 66.9 22.9 14 55.1 20.0 15 38.6 |— 6 59.5 |—2.6 |...-.. 36.5 15 05.6 17.8 4 26.5 25.3 01 44.2 |+ 6 56.0 |—2.6 }.-..-.. 37.6 10 26.3 26.6 05 34.9 |+ 3 04.8 |—2.9 |...--. 36.8 8 23.8 | 14.0 | 23.8 4 91.7 | 15.9 | 22.0 10 46.6 |— 2 08.0 |—3.7 |..---- 34.9 —0 91.2 | 21.0 | 17.2 | 308 p.m. 13 24.0 | 10.7 | 28.0 17 44.9 |— 9 05.7 |—3.1 |+0.1 36. 2 Changed incli- 11 97.0 | 26.2 | 12.5 nation. 08 17.0 |+ 0 17.0 J41.3 }..---. 358" 2 15.6 | 24.6 | 14.0 02 01.0 |+ 6 35.3 |+0.5 |.-..--. 36.8 12 41.0 | 15.0 | 23.3 11 76.1 | 17.7 | 19.9 11 83.2 | 20.0 | 17.7 08 37,3: |— 0 02.7} 0.0 ).--... 34.6 7 31.0 | 17.9 | 20.0 41 05 44.6 |+ 2 51.6 I—1.0 |..-.-. 41 08 35. 2 432 ASTRONOMY. Observations and computations—Continued. SIDNEY BARRACKS, NEBRASKA. Level. Corrections. INo. of| Microm. = SS Z Date. | star. | readin ps. Remarks. declination.| y5;crom Latitude. N. S Aatl mara Level.) Merid. 1874, t. d. d. d (o) i “at 4 “ a“ a“ oO ul ul Sept. 27 | 8268 7 03.2 | 13.8 | 23.7 41 12 03.4 |— 3 28.2 |42.1 |------ 41 08 37.3 882 | 21 64.8 | 11.3 | 26.4 21 26.3 |—12 51.7 |+0.9 |.--.--- 35.5 8324 1 63.1 | 28.6] 9.7 16} 16 88.0} 11.1 | 27.3 67 | —O 21.6 | 31.0] 7.9 19 33.1 |—10 59.1 |+1.6 |.----- 35. 6 100 | 12 08.0 | 22.9 | 15.9 14 14,2 |— 5 39.2 |42.1 |.----. ySied 152} 16 54.0 | 20.2 | 18.5 17 06.1 |— 8 31.1 |40.9 |.----. 35. 9 173 3 28.2 | 20.5 | 18:3 215 | 13 41.1 | 23.3 | 14.9 254 4 24.1 | 15.0 | 23.6 02 44.3 |4+- 5 538.5] 0.0 |.----- 37.8 283 | 13 44.4 | 15.7 | 22.9 337 4 12.2 | 20.8 | 18.0 02 38.1 |-+ 5 59.4 |—1.0 }...... 36.5 368 4 36.9 | 18.2 | 19.8 : 387 | 14 10.3 | 19.9 | 19.0 14 51.5 |— 6 15.3 |-0.2 |...--. 36.0 412 SeEBHU) || 16% 1b |) Pact 05 16.6 |+ 3 19.3 |+2.0 |....-. 37.9 444 | 17 04.6 | 13.4 | 24.5 13 56.1 |— 5 21.7 |+1.1 |----.. 35.5 453 8 70.0 | 27.0 | 11.2 487 | 16 23.9 | 20.1 | 17.8 516 1 26.2 | 20.0 | 18.1 18 12.5 |— 9 37.4 |41.0 |.----. 36.1 540 4 98.0 | 12.1 | 25.6 576 | 12 8.3 | 28.8] 9.0 41 03 32.5 |4+ 5 03.5 |41.5 |.-.---- 41 08 37.5 Note.—The observations on pairs 600 and 629 were excluded in obtaining the mean. ASTRONOMICAL CO-ORDINATES OF STATION AT SIDNEY BARRACKS, NEBRASKA. Longitude.. 6% 51™ 525.888 + 0.030 or 102° 58/ 13.32 + 0.45 west from Greenwich. Longitude.. 1° 43™ 40°.768 or 25° 55! 11/.52 west from U. 8S. Naval Observatory, Wash- ington, D.C. Wrapiiude..cG225 o85- 2 ccieemee ones 41° 08! 367.75 + 0.05 north. The latitude was obtained by taking the separate results given by each pair, and thus securing twenty-eight individual results. Cf report on Colo- rado Springs, p. 78. U. S. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN, ist Lirut. GEO. M. WHEELER, Cores or ENGINEERS, U. 8. ARMY, IN CLIARGE. RESULTS OF OBSERVATIONS MADE BY DR. F. KAMPF AND JOHN H. CLARK IN THE DETERMINATION OF THE ASTRONOMICAL CO-ORDINATES OF JULESBURG, COLORADO. SEASON OF 1874. COMPUTATIONS BY Dr. F. KAMPF. 28 AST 433 a? weet ee Soe ‘ Ltt ©e ; ‘ ry " ce a = 4 ‘ = . * @ rr _. ye j : - - = = JSJULESBURG, COLORADO. GEOGRAPHICAL POSITION OF STATION. Longitude,. . . . . . 102° 21/ 32/304 0.43 west from Greenwich Latitude, ; 40° 59’ 07.63 + 0”.04 north. Altitude of observatory above sea-level (from railroad surveys), 3,500.0 teet. The astronomical station was established at a distance of about 45 feet from the side-track of the Union Pacific Railroad, and 27 feet from the southwest corner of the warehouse belonging to the same. About twenty-five years ago the settlement of J ulesburg was of con- siderable size, but, the town being attacked and destroyed by the Indians in 1852, the greater part of its population removed to Sidney and North Platte. At the time of the occupation of this station there were but five houses in the place, and three of these were the property of the railroad company. The surrounding country is level, except in the southeast, where, four miles away, the plains are broken by hills. At a distance of two miles the Platte River flows by in an easterly direction. On its banks some efforts at agriculture have been made, but with very little success. METEOROLOGICAL CONDITIONS. During the time of occupation the weather was fair, with the excep- tion of two days, when it rained. In general the air was calm until 10 o'clock in the evening, when the atmosphere began to grow undulatory, and after 12 o’clock, midnight, it became so hazy that stars of the sixth mag- nitude were invisible. For description of observatory and instruments, personnel of party, name of computer, and other information omitted here, the reader may con- sult the report on the Las Vegas station, which possessed many circum- stances of observation in common with this. 435 436 ASTRONOMY. The use of the Atlantic and Pacific Telegraph line was kindly granted by the superintendent at Omaha, and over this route exchanges for time were made with Ogden on October 7, 8, 9, 10, and 11. determined by observations on the nights of October 9, 10, and 11. The length of circuit was 650 miles. The latitude was For the transmission of signals the local battery in the office at Julesburg was employed, and this was assisted by a repeater at Cheyenne. Tabulation of stars used for determination of time at Julesburg, Colorado, and Ogden, Utah, 1874. JULESBURG.| OGDEN. Name of star. eiola Se aie|c olal= a - ae d FES 2 SEIS Sigs Bla\|2 2 2)5)21a)5)5 SILiSi2S SSS S125 ol/ololio oO, 9O/O!IC;S/9O SIS |D OS O\O|O OOO a WA MED = oacos0 eseesnes AGI Neale! X|X X|X|X Zp). ait ssoedos boaubone al lecllae| dloo callecllos (jp AB Thad eeeeeercesacuee 5a ||55||52\ Ge bal bs PSI<|bs< o< t) Draconis =.--2--=--- --|--|--)--/X|X X|X)X T IDEN taassoecces Selle _.|.-|--1xlx x1xlx 0) Aquilae ee 5 | | | | Pe ee cae i) BC yeniessee sees ae =) ele le Be “Gy ani cesecns mee Be\na\|s2|24/501'S-< G IDOE oo5sns5 S555 X|-.|X|X X|X|X X]X|X Dh (Chfa i sonccecascas sal Px|lee PC'S Se leellos 25l}nelle= T Aquile ...-- S55 |lbslloa\pxilos. DX) /acl|ae o¢ 0 Aquilse%s:- =. -25- 2 X|--|X|X Xi- : BILGE Chart aes cos eSeaeene IX| [XIX XI- Kk Cephelqes--==--ao--5 X|--|--|x X|-- Vy Oy piece tessa se =e EAI IX : Te CADNICOM cee e=eee SEcIPAISS Silse 60 CO sosssossssene Aral X|-- — wow 2 age Hmm DmmDea RD OF = Lies SoS) yRoc wasn e (Ag uanileeeeese oe eas Draconis, L. € - .-----}--}--|-- calles 26 Cephei Pegasi XXX: JULESBURG.| OGDEN. Name of star. riclelSlalx lolalala s/c Blelade Lt Lz Civ = {= =\2 é £)2\8|8 o lcejojolo ic S| |O|O Del phinigeses= see Sal | foe) Ps<| Batt tea =| esl ae Delphinieessatesa = ss(loa|le<|lse|[e)/o5 (20) /s2|lea|lec Cy gnine seco eee == == --|X #155) |e) Sal lee AQUAane====-see ae So (25|lea| [sa] 2s eal los [2a lle = Gephei2s- 22. 78.5225. male |X|--|X|--|X Aquariinsese eos o Dalen SA] Sal XS x IRS Sees basa coon|ls= X| - --|X|--|X]--|X Cephei)-22 2: /2-..-=-- --|X|-- -|X|--|X]--|X Capricorni -2222. 2.1. Lalbedlecl else balls [Sale IDraconiss-=-.-s.-2--- 5-WEol|s --|X|--|X]--|X JAG TIASUTE & anoren AeeSoe = --|X|--|X]--|X Cephelleonas- ose =| ee Allee [eal laa) Ps<| tel ssl le-ay bs Ursx Majoris, L. C ---}.-|--|- =|XI fe we IAG MEET Fas S55 eeseese||4-]|s<||20)|s= ~ JAG WANA S65 c56as5se55|s=|\5- 2 x x x x Pegasi TROIS ease esocaccoos||s4|\s- Gepliei==-- eee -cre==-)|— Andromede .-.--- Pegasi, .---<- Cephei ..---- Pegasi 1 KKXKK KKK: SEXO NE Hn TIME DETERMINATIONS. Observations and reductions for time taken at sending station. JULESBURG, COLORADO, OCTOBER 7, 1874. 437 Qa I Name of star. T. thaw Bb. anes, a, AR. AT. 5 hom. 8. B 8. 8. hom. 3. hem. 8; Cie ei? E.| 6 Aquile........./19 15 20.58 + 3.32 0.00 |+ 0.20 |19 15 24.10 |19 19 10.55 + 3 46.45 Brien (Cy oni eee cone 22 47.55 |— 1.55 |— 0.03 |+ 0.32 22 46. 32 26 32.55 46. 23 tke ep Aquilae ce oe 26 18.06 |+ 4.01 |— 0.03 |+ 0.20 26 22,24 30 08.81 46. 57 Bren)|| ya) = AQuils cesses cee 36 23.50 |+ 2.78 |— 0.05 |+ 0.20 36 31. 43 40 18. 02 46. 59 Beye PAlquilseecee see. 40 50. 42 |+ 2.89 |— 0.03 |+ 0.20 40 53. 48 44 40.05 46. 57 Kee Draconis ---2-: 44 55.52 |— 7.54 |— 0 05 |+ 0.58 44 48,51 48 35.16 46, 65 Baie) (Cyonibee sae cece 48 38.30 |— 1.66 0.00 |+ 0.33 48 36.97 52 23. 32 46.35 Wail 0h. “Aquilzoseceenn.- 20 01 00.60 |+ 3.58 |— 0.11 |~ 0.20 [20 01 03.87 |20 04 50.37 46.50 We) Slo yonimesses nee 05 55.92 |— 0.75 |— 0.22 I— 0.29 05 54. 66 09 41.17 46,51 Wail.) 7iCephell- + e252. 09 34.12 |—14. 45 |— 0.55 |— 0.91 09 18, 21 13 04.70 46, 49 Wei Cyeniese cee one 13 57.64 |+ 0.16 |— 0,19 0. 26 13 57.35 17 43.94 46. 59 W.| x Capricorni ..... 16 18.06 |-+ 4.87 |— 0.08 |— 0,21 16 22.64 20 09.03 46, 39 Wey Gee @epheieasee see 23 47.38 |— 4.28 |— 0.34 I— 0.43 23 42.33 27 28.76 46. 43 Wii (Giee Dol phiniys seen: 20 27 51.84 |4+.2.51 |— 0.18 — 0.21 [20 27 53.96 [20 31 40.46 + 3 46.50 NORMAL EQUATIONS. 0=-+ 13.77 + 14.00 dt— 114a— 2.386 a= -+ 58.350 0=—=—72.63— 1.14 d¢-+13.12a+ 9.48¢ c =-+ 08.200 O=— 62.02— 2.38 6¢+ 9.48a+50.30¢ JULESBURG, COLORADO, OCTOBER 8, 1874. s E Name of star. Te Aa. Bb. Ce. Te AR. At. ) Wien ints) ues Gk 8. Ch Wats 65 WIR ta Ce m 8 Wiss) 8): Cepheti-aase-scse 21 23 18.20 |— 0.84 |— 0.43 |— 0.48 [21 23 16.45 |21 27 02.90 + 3 46.45 Wis Sa Aquanijeeeensese 27 18.59 |+ 0.46 |— 0.11 |— 0.16 27 18.78 31 05.30 46. 52 Wii e> Pepasi c2c2c0.c2.8 34 15.74 |+ 0.31 |— 0.15 |— 0.16 34 15.74 38 02. 37 46. 63 jW.-.|| 11° Cephei 2252-2 oe 36 21.08 |— 0.89 |— 0.45 |— 0.49 36 19.25 40 05.73 46, 48 E. | # Capricorni ...... 21 42 41, 42 |-+ 0.50 |— 0.10 |+4 0.17 [21 42 41.99 [21 46 28, 42 + 3 46.43 0=-+ 0.95 + 5.00 dt —0.77 a NORMAL EQUATIONS. 0=— 3.54 — 0.77 dt + 5.86.4 Adopted ¢ + 08.163 a=- 08,591 438 ASTRONOMY. Observations and reductions for time taken at sending station—Continued. JULESBURG, COLORADO, OCTOBER 9, 1874. | Nameofstar. | T. Aa. | Bb. | Ce. 1. AR. AT. S lth ate GE 8. 8. Se Siltsaan> esan | lteter as m. 8 Beale Aguila -a-eee 19 36 31.56 |-+ 0.27 |— 0.10 |+ 0.12 {19 36 31.85 |19 40 17.99 | -+ 3 46.14 E.|.c Aquile...--.--- 40 53.56 |+ 0.28 |— 0.13 |+ 0.12 40 53.83 44 40.02 46.19 BE. |e Draconis ..-.--- 44 49.82 |— 8.74 |— 0.49 |4+ 0.35 44 48,94 48 35. 04 46.10 16 |) OMe eee=cooce 48 37.44 |— 0.16 |— 0.35 |+ 0.20 48 37.13 52 23.25 46. 12 DH || ge ge) eee ease 54 14.70 |+ 0.29 |— 0,21 |+ 0.12 54 14.90 58 01.06 46.16 E.| @ Aquilw......-../20 01 03.90 |+ 0.35 |— 0.19 |+ 0.12 }20 01 04.18 |20 04 50.34 46.16 W. | 3lo'Cygni..-.... 05 55.38 |— 0.07 |— 0.13 |— 0.18 05 55.00! 09 41.11 46.11 Wo || 9? wea fat sawn sececc 13 58.12 |4+ 0.01 |— 0.16 |— 0.16 13 57.81 17 43.89 46. 08 W.| z Capricorni.-.---. 16 22.66 |+ 0.47 |— 0.07 |— 0.13 16 22.93 20 09.00 46, 07 WO), ’Cepheiseasa==-- 23 43.52 |— 0.42 |— 0.34 |— 0.26 23 42.50 27 28. 67 46.17 W.|a@ Delphini ------- 30 03.16 |+ 0.24 |— 0.18 |— 0.12 30 03.10 33 49.21 46.11 Wiel] GCOS ae --6 ec5Sce 20 33 24.04 |— 0.05 |— 0.30 |— 0.17 |20 33 28.52 [20 37 09.71 | -+ 3 46.19 | NORMAL EQUATIONS. 0=—- 0.32 + 12.00 dt +0.93a+ 0.16¢ a=-t 05.525 0=— 2414 0.930t-+5.10a— 1.70c c=-+ 08121 0=— 2.48-+4 0.16 d¢— 1.70 a+ 27.96 ¢ JULESBURG, COLORADO, OCTOBER 10, 1874. a I Name of star. Te, Aa. Bb. Ce. 1 AR. Xe. Ss) hm 8. 2th 38. 8. (Sats oh Les 5 Ms) (Ss al | (Gee Cyonter== eee 19 21 53.36 |+ 0.23 |— 0.11 |4 0.18 |19 21 53.71 |19 25 39.84 + 3 46.138 Bile Aguile see ss-sse 26 22.02 |-+ 0.81 |— 0.12 |4+ 0.16 26 22. 87 30 08.76 45. 89 eG) (Cyenijcee a —-- 29 18.90 |\— 0.26 |— 0.38 |+ 0.25 29 18.51 33 04.56 46. 05 De || oe ANG TNE yo a ooee 36 31.56 |-+ 0.56 |— 0.26 |+ 0.16 36 32. 02 40 17.97 45. 95 By |ia: Aquilse--=2----- 40 53.56 |-+ 0.59 |— 0.29 |4+ 0.16 40 54. 02 44 40.00 45. 98 BE. lve) Draconis): = 44 50.84 — 1.53 |— 0.97 |+ 0.47 44 48.81 48 34.97 46. 16 Toe || dh Chaiilcnssccecse 48 37.92 '— 0.34 |- 0.67 |4 0.26] 48 37.17] 52 23.22 46. 05 W.| 6 Aquilwe.....--../20 01 03.92 |4 0.73 |— 0.11 |— 0.16 [20 01 04.38 }20 04 50.32 45.94 W.| 31o'Cygni-.-.-.. 05 55.68 — 0,15 |— 0.22 | 0.23 05 55. 08 09 41.09 46. 01 W.| « Cephei ---. 09 22.74 — 2.93 |— 0.51 -— 0.73 09 18.57 13 04.40 45, 83 W.| y Cygni 13 58.16 |+ 0.03 |— 0.17 |— 0.21 13 57.81 17 43.87 46. 06 W.| « Capricorni -.-... 16 22.16 |4+ 0.99 |— 0.06 |— 0.17 16 22.92 20 08.98 46. 06 W.| 6 Cephei..-..-.-.-.- 23 43.90 |— 0.87 |— 0.12 |— 0.25 23 42.56 27 28. 62 46. 06 W.| B Delphini -..---.)20 27 54.22 4+ 0.51 0.00 |— 0.16 )20 27 54.57 |20 31 40.41 + 3 45.84 NORMAL EQUATIONS. O=+ 3.34+14.00dt— 1454a— 2.30¢ a= + 15.085 0=—15.50— 1.45 d-+12.79a+ 9240 c= + 08.160 O=—18.34— 250dS¢-+ 9.294 a + £0.42 ¢ TIME DETERMINATIONS. 439 Observations and reductions for time taken at sending station—Continued. JULESBURG, COLORADO, OCTOBER 11, 1874. a : q Name of star. dhs Aa. Bb. Ce. 5 hem. 8 8. 8. 8. E.| « Aquile....-.-..|19 26 22.08 | 0.53 0.00 |-++ 0. eG) Gyenieseeen c=. |) 29) 18558) — 0517) 0515 + 0. Db jo FAG HME oe oosce 36 31.58 |+ 0.37 |— 0.09 |+ 0. Dp aE scoensne 40 53.70 |+ 0.39 |— 0.08 /4 0. E. |e Draconis ....--- 44 49.74 |— 1.01 |— 0.26 |4 0. 194 | oh Ohl sceoscinse 48 37.20 |— 0.22 |— 0.16 |+ 0. By jr: Aquile.---. <--- 54 14.70 |+ 0.40 |— 0.08 |+ 0. W.| 6 Aquile....-..-. 20 01 04.18 |-+ 0.48 |— 0.14 | 0. W.| 3lo'Cygni-..---...- 05 55.78 |— 0.10 |— 0.28 |— 0. \Wwollge (ioe csoeccas 09 21.86 |— 1.93 | 0.73 |— 0. W.|y Cygni---------- 13 58.32 |-+ 0.02 |— 0.27 |— 0. W.| xz Capricorni - 16 22.66 |-+ 0.65 |— 0.11 |— 0. Wil (Gem Gephetesseesicae 23 43.86 |— 0.57 |— 0.46 |— 0. W.| @ Delphini ..-.--- 20 27 54.46 |-+ 0.34 |— 0.20 |— 0. TT. AR. hm. 8 hom 8 19 26 22.78 |19 30 08.75 29 18.52 33 14. 52 36 32.03 40 17.95 40 54.18 44 39.99 44 48.97 48 34.90 48 37.10 52 23.18 54 15.19 58 01.03 20 01 04.35 }20 04 50.31 05 55.15 09 41.06 09 18. 42 13 04.29 13 57.85 17 43.85 16 23. 02 20 08.97 23 42. 46 27 28.57 20 27 54.43 |20 31 40.39 AT. m. 8 +. 3 45.97 46. 00 45. 92 45. 81 45. 93 46, 08 45, 84 45, 96 45,91 45. 87 46. 00 45.95 46.11 + 3 45.96 NORMAL EQUATIONS. O=+ 473-+4+14.00 dt— 115a— 2420 0=—11.18— 1.15 dt+13.03a+ 9.52¢ 0=—15.88— 2420t+ 9.520 + 50.166 a=-+ 05.713 c=- 08.170 440 ASTRONOMY. Observations and reductions for time taken at receiving station. OGDEN, UTAH, OCTOBER 7, 1874. a 5 Name of star. ~ 1. Aa. Bb. Ce. Te AR. AT. a hey. ai8s 8. 3. 3. hm 8. gis EB Mm. | (8. W. 18 38 41.09 |— 0.10 |+ 0.08 |— 0.06 /18 38 41.01 |18 32 41.28} — 5 59.73 W. 46 10.64 |— 0.08 |+ 0.09 — 0.06 46 10.59 40 10.79 59. 80 W. 51 26.78 |— 0.27 |+ 0.08 |— 0.06 51 26.53 45 26.81 59. 72 W. 55 19.94 |+ 3.50 |4+ 0.19 — 0.19 55 23. 44 49 23. 62 59. 52 Wio)| 57 lane) s esse ss5- 19 00 15.02 |— 0.29 |4+ 0.07 — 9.06 |19 00 14.74 54 15.06 59. 68 W.| ¢ Aquilw........-. 05 39.34 |— 0.76 |+ 0.06 |— 0.05 05 338.59 59 38. 64 59. 95 E. | d Sagittarii -..---. 16 19.08 |\— 1.46 |4+ 0.09 + 0.05 16 17.76 |19 10 17.90 59. 86 E. | 6- Draconis -.--..--- 18 28.28 |+ 1.83 |+ 0.42 4 0.13 18 30. 66 12 30.97 59. 69 Eni Draconis---.---- 23 52.97 |-+ 2.89 |+ 0.46 |+ 0.17 23 56.49 17 56.79 59. 70 Ble Cyenien-e-e---< 31 39.83 |— 0.43 |+ 0.15 + 0.06 31 39. 66 25 39.90 59.76 Baie, Aquilso-=----1---— 36 09.56 |— 1.21 |+ 0.09 |+ 0.05 36 08. 49 30 08.81 59. 68 ||) Aquilae =----- = 46 18.51 |— 0.82 |+ 0.10 |+ 0.05 46 17.84 40 18.02 59. 82 Beja. (Aquilscs=------— 50 40.61 |— 0.86 |+ 0.08 + 0. 05 50 39. 88 44 40.05 59. 83 E. | e Draconis ---. ---- 19 54 32.55 |+ 2.23 |4+ 0.23 [+ 0.14 |19 54 35.15 |19 48 35.17 | — 5 59.98 | Bp ~Aquarni=-------= 21 30 58.93 |— 1.26 |— 0.16 |+ 0.08 [21 30 57.59 |21 24 58.17 | — 5 59.42 E. | 8 Cephei..-.. : 33 00.96 |+ 2.40 |— 0.62 -+ 0.22 33 02.96 27 02.95 60. 01 ee Aquaril =-=-5---= 37 06.11 |— 1.31 |— 0.16 + 0.08 37 04.72 31 05.31 59. 41 dy || Be LTeWsat —55- assos- 44 02.80 |— 0.92 |— 0.22 + 0.08 44 01.74 38 02. 36 59. 38 E. | 11 Cephei.--....---. 46 03.30 |+ 2.53 |— 0.71 4 0.23 46 05. 35 40 05.78 59. 57 E. | » Capricorni -.-.--. 51 29.54 |— 1.45 |— 0.17 |4 0.08 51 28.00 45 28.43 59. 57 W.| 79 Draconis ...-..-. 57 17.42 |+ 3.10 |— 0.93 — 0.26 57 19.33 51 19.64 59. 69 W.| a Aquarii.........|22 05 22.69 |— 1.14 j— 0.23 |— 0.07 |22 05 21.25 59 21.42 59. 83 W.} ¢ Cephei-.-.-.---.. 12 30.58 |+ 0.88 |— 0.54 — 0.14 12 30.78 |22 06 31.15 59. 63 W.| 32 Urse Maj., L. C-- 14 56.49 |— 3.96 |4 0.22 + 0.18 14 52.93 08 53.15 59.78 Wie || 52 Aken ith Soe6 sone 21 12.91 |— 1.16 |— 0.23 |— 0.07 21 11,45 15 11.64 59. 81 Welz, -Aguariil=.------- 24 54.59 |— 1.10 |— 0.24 |— 0.08 24 53.17 18 53.28 59. 89 W.!|9 Draconis, L. C.../22 30 26.18 |— 6.40 |+ 0.65 |4 0.32 |22 30 20.75 |22 24 20.98 | — 5 59.77. NORMAL EQUATIONS. First series. 0=+ 6.63+4 14.00 dt— 2.62a+ 425¢ a—=— 12.590 0=+19.99— 2.62 6t+13.79a— 2.60¢ e=-+ 05.049 0=— 3.50+ 4.25 dt— 2.60a-+ 55.09 ¢ Second series. 0O=+ 489-4 13.00 dt+ 5.75a+ 8.40¢ a=— 15,701 O0=+ 48.964 5.75 dt+ 30.84a-+ 21.17¢ c=- 08.076 O0—+498.37-+ 8.40 dt+ 21.17 a+ 64.10¢ | Clamp. Hibrbeededaas TIME DETERMINATIONS. 44] Observations and reductions for time taken at receiving station—Continued. OGDEN, UTAH, OCTOBER 8, 1874. Name of star. a Aa. Bb. Ce. MWe AR. hom. 8. 8. a Oh hem: 73: hm 8 Gy WLiyT bers sose meee 18 38 42.23 |+ 0.02 |— 0.06 |— 0.09 |18 38 42.10 |18 32 41.25 fs) inp) Sess --| 51 27.67 |4+ 0.07 |— 0.09 |— 0.08 51 27.57 45 26.79 50 Draconis -| 56 25.79 |— 0.85 |— 0.33 |— 0, 27 56 24,34 50 23.53 y, AoyTeetecnte -/19 00 15.84 |+ 0.07 |— 0.13 |— 0.08 |19 00 15.70 54 15.04 ¢ Aquilw .........| 05 39.38 |+ 0.18 |— 0.12 |— 0.07 05 39. 37 59 38. 62 e Lyre -....------| 08 50.31 |+ 0,04 |— 0.16 |— 0.08 08 50.21 |19 02 49.52 Oy Draconise-see-ee 18 31.59 |— 0.44 |— 0.07 |+ 0.18 18 31.56 12 30.91 t Draconis......-.| 23 57.84 |— 0.70 |— 0.09 |+- 0.23 23 57.28 17 56.72 8 Cygni ..-....-.-| 31 40.37 |+ 0.10 |— 0.04 |+ 0.08 31 40.51 25 39.88 is, EXOUMES 556 Sose 36 09.31 |4+- 0.29 |— 0.03 |+ 0.07 36 09. 64 30 03.79 yi Aquila 22ese---- 46 18.52 |+ 0.20 |— 0.03 |+ 0.07 46 18.76 40 18.00 aw Aquilayes-soe === 50 40.60 |+ 0.21 |— 0.02 |+ 0.06 50 40.85 44 40,03 e Draconis.-....-... 19 54 36.55 |— 0.54 |— 0.08 |+ 0.20 /19 54 36.13 |19 48 35.10 NORMAL EQUATIONS. 0=— 2.13 + 13.00 dE— 3.48a+ 3.266 a=- 03.385 0=—3.86— 3.48 dt+12.95a— 3.65¢ c= -+ 03.068 0=— 326+ 3.26 dt— 3.6544 54.15¢ 442 | Clamp. 424444449 RRE eS pees adees eS PINWAY D2 WE Ho on i=) MANRFOWSAT IN IDR ae~) e © a ASTRONOMY. Observations and reductions for time taken at receiving station—Continued. © Name of star. Capricorni -.-.- Draconis Aquarii Cephei=------- OGDEN, UTAH, OCTOBER 9, 1874. ute Aa. Bb. Ce. hem. & 8. 8. 8. 18 38 43.87 |+ 0.02 |— 0.10 |— 0.12 51 29.44 |+ 0.06 |— 0.10 |— 0.12 56 27.43 |— 0.73 |— 0.29 |— 0.38 19 00 17.59 |+ 0.06 — 0.10 |— 0.11 05 41.22 |+ 0.16 |— 0.09 |— 0.10 08 52.17 |+ 0.04 |— 0.12 |— 0.12 16 20,22 |+ 0.30 0.09 |-+- 0.10 18 33.81 |— 0.38 |— 0.42 |+ 0.25 23 59.91 |— 0.60 — 0.52 |+ 0.33 31 42.22 |+ 0.09 — 0.19 |+ 0.11 36 11.22 |4+ 0.25 |— 0.11 |+ 0.10 46 20.31 |+ 0.17 — 0.13 |+ 0.10 50 42.39 |-+ 0.18 |— 0.13 |+ 0.10 19 54 38.31 |— 0.46 |— 0.40 [4+ 0.28 21 33 05.40 |— 0.40 + 0.17 |+ 0.22 37 07.38 |+ 0.22 |+ 0.03 |+ 0.07 44 04,42 |+ 0.16 |+ 0.02 + 0.08 46 08.13 |— 0.43 0.00 |-+ 0.22 52 30.50 |+ 0.24 — 0.01 |+ 0.08 57 22.37 |— 0.52 |— 0.09 |+ 0.25 22 05 23.53 |-+ 0.19 |— 0.02 + 0.08 12 34.78 |— 0.77 |— 0.23 |— 0.14 16 15.52 |4+ 1.15 |— 0.09 |— 0.08 21 13.40 |+ 1.01 |— 0.09 |— 0.07 24 55.05 |+ 0.96 |— 0.10 |— 0.07 36 12.34 |— 3.27 |— 0.46 |— 0.30 41 15.34 |+ 0.77 |— 0.13 |— 0.08 43 10.66 |+ 0.34 |— 0.17 |— 0.09 46 32.61 |+ 0.49 |— 0.15 |— 0.08 22 51 18.85 |— 1.47 |— 0.33 | — 0.18 NORMAL EQUATIONS. First series. 0 = -- 0.65 + 14.00 dt— 2.56a+ 4.32¢ 0=—412— 2.56 dt-++13.80a— 267¢ 0=—4.74-4 4326t— 2.67 a+ 55.276 For E.: 0=+ 0 =— 2. For W.:0=-+ 2 0=—12. Second series. 7.00 dt —1.99 a 1.89 dt-++ 9.57 a + 9,00 dt — 0.53 a — 0.53 dt + 8.05 a Adopted c= -+ 0.074. ee lie ie oh [Pe tia) 3 18 38 43. 67 |18 32 41.23 51 29.28 45 26.76 56 26. 03 50 23.43 19 00 17.44 54 15. 02 05 41.19 59 38. 60 08 51.97 |19 02 49. 49 16 20.53 10 17.87 18 33.26 12 30.85 23 59:12 17 56.63 31 42.23 25 39.86 | 36 11.46 30 08.78 46 20.45 40 17.99 50 42.54 44 40. 02 19 54 37.73 |19 48 35. 04 21 33 05.39 |21 27 02.85 37 07.70 31 05.29 44 04.68 38 02. 34 46 07.92 | 40 05.68 52 30.81 46 28. 41 57 22.01 51 19.54 2 05 23.78 59 21. 40 12 33. 64 |22 06 31.09 16 16.50 10 13.90 21 14.25 15 11.62 24 55.84 18 53.26 36 08.31 30 05.70 41 15.90 35 13.33 43 10.74 37 08.39 46 32.87 40 30.36 22 51 16.87 |22 45 14.40 a=-+ 03,331 c=-t 03.096 a=+ 03.287 a=- 15.480 — 6 02,44 02. 52 02. 42 02.59 02. 66 02. 41 02. 49 02. 37 02. 68 02. 46 02. 52 — 6 02.69 — 6 02.54 02. 41 02. 34 02. 24 02. 40 02. 47 02. 38 02. 55 02. 60 02. 63 02.58 02. 61 02. 57 02. 35 02.51 — 6 02.47 TIME DETERMINATIONS. 443 Observations and reductions for time taken at receiving station—Continued. OGDEN, UTAH, OCTOBER 10, 1874. a z Name of star. i Aa. Bb. Ce. fe AR. AT. S hem. 8. 8. 8. On Wes ace CR Mop ds Me (8s Wwe Wiarisecese coco 18 38 45.65 |-+ 0.09 }— 0.13 |— 0.12 /18 38 45. 49 |18 32 41.20 | — 6 04.29 Wwe lWa dlymt So oeeseene 51 31.02 |+ 0.24 |— 0.16 |— 0.12 51 30.98 45 26.74 04, 24 W.| 50 Draconis ..-.-.-... 56 31.92 |— 3.16 |— 0.39 |— 0.38 56 27.99 50 23. 33 04. 66 iva || 52 NES 3a5565 cece 19 00 19.29 |+- 0.26 |— 0.14 |— 0.11 |19 00 19.30 54 15,00 04.30 Wala Aquile-- =... 05 42.58 af 0.69 |— 0.13 |— 6.10 05 43. 04 59 38.59 04. 45 aoe rye yar 08 53.90 0.16 |— 0.18 |— 0.12 08 53.76 |19 02 49. 47 04.29 E.| dad Sagittarii ...-.-. 16 21.06 |+ 1.32 |— 0.03 |— 0.10 16 22.25 10 17.85 04. 40 Ei 0 Draconis -.2--.- 18 36.53 |— 1.65 0,00 |-+ 0.25 18 35.13 12 30.79 04,34 10s |g IBN CONE GoSecce 24 03.08 |— 2.62 |4+ 0.09 |+ 0.33 24 00. 88 17 56.55 04, 33 IDA |ive) (Cafes ceoo cece 31 43.74 |+ 0.39 |+ 0.03 |+ 0.11 31 44, 27 25 39. 84 04, 43 I |g AGM ES oossnce 36 12.22 |+ 1.09 0.00 |+ 0.10 36 13.41 30 08.76 04. 65 Eby.) Aquiles=--: =. 46 21.78 |+ 0.75 |— 0.02 |+ 0.10 46 22.61 40 17.97 04. 64 Dill Nrigile se Sooo 50 43.74 |+ 0.78 |— 0.03 |+ 0.09 50 44.58 44 40.00 04.58 E. |e Draconis .....-.|19 54 41.26 |— 2.01 |— 0.10 |+ 0.28 |19 54 39.43 /19 48 34.97 | — 6 04.46 E. | 32 Urs Maj., L. C.|22 14 55.16 |+ 2.97 |— 0.07 |— 0.18 )22 14 57. 88 )22 08 53.30 | — 6 04.58 E.| y Aquarii -....... 21 15.30 |+ 0.87 |-- 0.05 |+ 0.07 21 16.29 15 11.61 04. 63 E. | « Aquarii -.....--. 24 56.97 |-+ 0.83 |+ 0.03 |+ 0.07 24 57.90 18 53.26 04, 64 BE. | 226 Cephei-.-...-.-. 36 12.63 |— 2.82 |4+ 0.07 |+ 0.30 36 10.18 30 05. 64 04. 54 B.|¢ Pegasi =-------- 41 17.14 |+ 0.66 0.00 |+ 0.08 41 17.88 35 13.32 04. 56 HE. |7 Pepgasi=--.-.-.. 43 12.49 |+ 0.29 |— 0.01 |+ 0.09 43 12.86 37 08.38 04. 48 E.| 2 Pegasi -.-...---. 46 34.46 |-+- 0.42 |— 0.02 |+ 0.08 46 34,94 40 30.35 04,59 138 | fe (6Gye Gres bene chon 51 20.19 |— 1.26 |— 0.04 |+ 0.18 51 19.07 45 14.37 04.70 W.|o Andromeda .-.../23 02 14.84 0,00 |— 0.19 |— 0.10 |23 02 14.55 56 10.16 04. 39 W.| y ~ Pegasi -.- ------ 04 36.35 |-+ 0.28 |— 0.13 |— 0.08 04 36. 42 58 31.8 04. 57 W.| x Cephei-...--.-- 10 13.33 |— 1.24 |— 0.43 |— 0.28 10 01.38 |23 03 56,79 04. 59 W.|v Pegasi -....-...- 23 25 13.02 |-+ 0.20 |— 0.14 |— 0.08 |23 25 13.00 |23 19 08.31 | — 6 04.69 NORMAL EQUATIONS. First series. O=+ 5.32+ 14.00 dt-— 2.56a+ 2.206 a=-+ 18.438 0=—19.72— 2.56 d¢+13.80a— 4.63¢ c= - 08.097 O=+ 150+ 2.20d¢— 4.63 a + 55.27 ¢ Second.-series. For E.: 0=— 1.19-++8.00dt-+ 1.544 0 =— 15.91 + 1.54 dt + 12.60 a a=-- 18.274 For W.: 0=+ 0.20 + 4.00 dt —1.29 a O=— 262—1.29 t+ 4.714 a= -+ 03,595 Adopted ¢= - 0.074 444 Clamp. ASTRONOMY. Observations and reductions for time taken at receiving station—Continued. OGDEN, UTAH, OCTOBER 11, 1874. S4SSSSeRE Rees pede sesaas Name of star. T: Aa. Bb. Ce. 4%, AR. hm. 8. 8. 8. Ge lis Gis 8B lie Tis — 3 a) Myre soo. == 18 38 48.03 |+ 0.03 |— 0.24 |— 0.08 |18 38 47.74 |18 32 41.18 [See ini) asccono5ac 51 33.60 |+ 0.08 |— 0.23 |— 0.07 51 33.38 45 26.71 50 Draconis ------- 56 32.19 |— 1.02 |\— 0.58 |— 0.23 56 30.39 50 23. 24 a DKS) Goocos esec 19 OU 21.81 |+ 0.08 |— 0.18 |— 0.07 |19 00 21.64 54 14,97 Go pAquile zee s=s es 05.45. 42 |-+ 0.22 }— 0.14 |— 0.06 05 45, 44 59 38. 57 b hyrey-eee eos 08 56.43 |+ 0.05 |— 0.18 |— 0.07 08 56.23 19 02 49.44 d_ Sagittarii ..--.. 16 24.39 |+ 0.43 |— 0.01 |+ 0.06 16 24. 87 10 17.83 On eDraconis’=s-e-—- 18 37.81 |— 0.53 |— 0.05 |4 0.16 18 37.39 12 30.73 jm Draconis------- 24 03.88 |— 0.85 |— 0.06 |+ 0.20 24 03.17 17 56. 46 [8 (Che oo ccos seee 31 46.54 |+ 0.13 |\— 0.01 |+ 0.07 31 46.73 25 39.82 A) -Aquile=-------- 36 15.38 |+ 0.35 0.00 |+ 0.06 36) 15.79 30 08,75 y Aquilz-....-.... 46 24.63 |+ 0.24 0.00 |+ 0.06 46 24.93 40 17.96 @ JAE) Sooocoee 50 46,75 |+ 0.25 0.00 |+ 0.06 50 47.06 44 39.99 e Draconis..---.-|19 54 42.43 |— 0.65 0.00 |+ 0.18 |19 54 41.96 |19 48 34.90 B Cephei---.-.... 21 33 09.78 |j— 0.45 |+ 0.28 |+ 0.22 /21 33 09.83 |21 27 02.74 BINGEN = aooocs 37 11.86 |+ 0.25 |+ 0.06 |+ 0.08 37 12.25 31 05. 27 B IRYEIS sosccce oe 44 08.88 |+ 0.17 |+ 0.06 |+ 0.07 44 09.18 38 02. 32 jie Copheteeseee== 46 12.36 |— 0.48 |+ 0.18 |+ 0.22 46 12.28 40 05, 57 w Capricorni -..-. 52 34.96 |4+ 0.27 |+ 0.03 |+ 0.08 52 35.34 46 28.39 79 Draconis - .----- 57 26.66 |— 0.58 |+ 0.12 |+ 0.25 57 26.45 51 19. 43 @ JAGR enil soso cess 22 05 28.01 |+ 0.22 |+ 0.03 |+ 0.07 |22 05 28,33 59 21.38 G + G@ephei-----..-- 12 37.73 |+ 0.47 |— 0.16 |— 0.14 12 37.90 |22 06 31.02 @ Aquarii .-.....- 16 21.65 |— 0.70 |— 0.06 |— 0.08 16 20.81 10 13.89 y Aquarii .--....- 21 19.22 |— 0.61 |— 0.07 |— 0.07 21 18.47 15 11.60 mo) Aquaril-------- 25 00.80 |— 0.58 |— 0.08 |— 0.07 25 00. 07 18 53. 25 226 Cephei-.-..--.--- 36 11.16 |+ 1.98 |— 0.40 |— 0.30 36. 12.44 30 05.59 (6 LEGER sooccccce 22 41 20.75 |— 0.47 | 0.10 |— 0.08 |22 41 20.10 |22 35 13.31 NORMAL EQUATIONS. First series. 0=+1.79-+ 14.00 dt— 2.56a4+ 4.32¢ 0=—6.41— 2.56 dt 13.80a— 2.676 a= — 05.465 0=—1.79+ 4.32 d6t— 2.67 a+ 55.27 ¢ c= - 03.060 Second series. For E.: 0=-+ 0.86 + 7.00 df —1.89 a 0 =— 3.14 — 1.89 dt -+ 9.57 a a=- 08.321 For W. : 0=— 0.36 + 6.00 dt — 0.10 a 0—-+ 6.21 — 0.10 d¢ + 6.91 a a= — 03.898 Adopted c=-+ 08.074 FINAL RESULTS OF LONGITUDE. 445 The following tables show the corrections and rates of the chronometers used at Julesburg and Ogden: CHRONOMETER AT JULESBURG.—Necgus, No. 1344. Date Local sidereal | Correction of chro- | Adopted hourly 7 time. nometer. rate. 1874. h. he. m. 8. 8. Oct. 7 19.9 +0 03 46.49 0.00 Oct. 8 21.6 46. 50 0.00 Oct. 9 20.1 46.13 0.00 Oct. 10 - 20.0 46. 00 0. 00 Oct. 11 20. 0 +0 03 45,95 0. 00 CHRONOMETER AT OGDEN.—NEGus, No. 1511. mate Local sidereal | Correction of chro- | Adopted hourly P time.. nometer. rate. 1874. h. h. m. 8. 8. Oct. 7 20.6 —0 05 05.730 + 0.042 Oct. 8 ONS 06 00.750 + 0.057 Octo 20.7 02. 491 + 0.073 Oct. 10 21.6 04, 503 + 0.024 Oct. 11 20.7 — 0 06 06.878 + 0.099 Final results of longitude. ) g 5 Mean of sig- | -,- 7 $B EGS Signals sent from—| Recorded at— |nalssent and Se eoe Corrected a 2 5 Means. eeontradl ions. ime. = Ep Ss Ber ls A A October 7, 1874: he ™. 8: hm. 8. 06 OS) Mea a8 Phe ei te Orden Julesburg .-..| 21 05 33.12) +0 03 46. 49) 21 09 19.61 SSIS la ee Opdent-eas.—- 20 36 45.73) —0 05 59.73) 20 30 46.00) 38 33.61 paleshnn Julesburg .-..| 21 09 04.88) +0 03 46.49) 21 12 51.37 eee Ogden.......- 20 40 17.56) —0 05 59.73] 20 34 17.83 33.54] 0.07) 38 33.575 October 8, 1874: Orden Julesburg ....| 21 12 12.57) +0 03 46.50) 21 15 59. 07 S ke as Orden-_-- =.=. 20 43 26.24) —0 06 00.82) 20 37 25. 42 33. 65 Syaleshud Julesburg ....| 21 15 34.84) +0 03 46.50) 21 19 21.34 Bees Ogden......--| 20 46 48.62) —0 06 00.82) 20 40 47.80 33.54] 0.11 33. 595 October 9, 1874: @rden Julesburg -.-.| 21 16 43.09 +0 03 46.13) 21 20 29.22 = oo Pine: Opden..--.--- 20 47 58.26) —0 06 02. 49) 20 41 55.77 33, 45 pyalesbun Julesburg ....| 21 20 04.85) +0 03 46.13) 21 23 50.98 Bive ae Opden=. -a=--- 20 51 20.07; —0 06 02.49) 20 45 17. 58) 33. 40} 0. 05) 33. 425 October 10, 1874: Onden Julesburg .---| 21 01 54.81) --0 03 46.00) 21 05 40. 81) Bs ae a Ogden......-- 20 33 11.74| —0 06 04. 46] 20 27 07.28 33. 53 | Ayaleshar Julesburg ....| 21 05 14.89) +0 03 46.00) 21 09 00.89 | gee Ogden...-.-...-. 20 36 31.93) —0 06 04. 46) 20 30 27.47 33.42} 0.11 338. 475 October 11, 1874: Orden Julesburg .-..| 21 04 30.42) +0 03 45.95) 21 08 16.37} erie a nae a Ovden=-s-e--= 20 35 49.78) —0 06 06. 86} 20 29 42.92 33. 45) §| Julesburg ....| 21 07 49.85) +0 03 45,95) 21 11 35.80 PESTS secs | Ogden.....--- 20 39 09.36) —0 06 06.86) 20 33 02.50) 38 33.30) 0.15] 38 33.375 Julesburr east of Orden: -- 225 5----- s-s-n5 e---=- s-= === Oh 38™ 338.489 + 08.029 Or, 9° 38 22.34 =E 0.43 446 ASTRONOMY. Observations and computations for latitude. JULESBURG, COLORADO. See EEE Level. Number | Microm. - Half-sum of Date. of star. | readings. Remarks. declination. N. Ss 1874. tia: d. d. SEER tl! October 9 --. 8146 | 14 40.0 | 26.5} 9.3 8162 3 67.6 | 9.0) 27.0 40 52 14.5 8195 0 38.2} 8.0 | 27.6 8223 | 15 3070}.33.7 | 2.4 68 40.2 8237 | 10 80.9 | 31.3) 5.0 65 47.6 8247 4 36.0] 9.5 | 26.0 8277 | 13 08.4] 29.0] 7.0 64 43.2 8293 0 47.1} 26.9|) 85 8314 | 17 50.6 | 7.0 | 28.8 70 04.4 8324 1 82.0 | 14.0 | 21.5 8364 | 16 46.0 | 24.0 | 12.5 68 30.1 8372 | 11 94.0 | 23.0 | 13.8 Bd 36.8 Gr. 4237 6 23.0 | 18.5 | 17.8 53 34.6 13 6 34.0 | 18.5 | 17.8 53 39.5 58 | 14 8.0 | 21.2} 15.5 102 | 12 80.0 | 15.0 | 22.0 131 5 50.9 | 21.3 | 16.0 54 27.1 Gr. 96| 12 77.7 | 17.0 | 19.8 64 25.4 146 | 11 16.2] 17.0 | 19.8 63 23.0 164 4 54.8 | 19.0 | 18.0 178 7 86.1 | 18.8 | 18.0 182 9 76.6 | 17.3 | 19.8 60 21.5 215 925.5} 9.3 |-28.0 244 5 16.1} 30.0] 7.5 56 27.9 254 | 14 95.4 | 29.8) 8.0 62 47.3 283 4:90:27 | 383 |e --==- BS re |) HUSH lo sane 39.4 62 41.1 351 | 11 87.2 | 19.4 | 17.8 376 6 01.6 | 17.5 | 19.5 55 22.6 393 | 12 93.9 | 23.0 | 13.8 408 4 38.0 | 13.0 | 24.3 64 37.7 444 HSS ida pee ose 476 | 13 68.1] 20.9 | 17.2 53 36.1 502 1 60.7 | 13.9 |-23.3 510 |— 0 33.0 | 23.0 | 14.5 57 52.3 535 | 10 72.2] 7.0 | 29.8 57 28.2 564 2 26.1} 6.0 | 31.4 52 00.5 572 | 13 33.9 | 28.3 | 9.1] Dpl. med. 610 5 62.2 | 18.0 | 19.5 58 27.7 620 15 20.2 | 18.0 | 19.6 40 64 35.8 632 6 71.0 | 17.7 | 20.0 | Corrections. Microm. and refr. Level. 1 |42.7 2.0 |41.6 bering: “10 -9 |—0.9 4 |—0.9 Latitude. —0.2 | 40 59 07.7 07 -8 07.2 08. 2 08.7 40 59 07.2 LATITUDE DETERMINATIONS. 447 Observations and computations—Continued. JULESBURG, COLORADO. Dat Number | Microm. aUbe of star. | readings. 1874. ta aa. October 10 -. 8071 4 78.9 8122 | 13 16.2 8146 | 14 02.0 8162 3 24.2 8173 | 10 96.5 8182 6 42.8 8195 0 97.0 8223 | 15 78.1 8237 |) LP 2959 €247 @ Clee? 8277 | 12 38.0 8293 0 19.0 $314 | 17 15.3 8324 0 93.0 8364 | 15 55.0 8372 | 11 04.0 Gr. 4237 6 41.9 13 6 52.2 58} 15 10.5 102} 11 95.5 131 4 58.5 Gr. 96] 12 73.1 146 | 11 12.0 164 4 48.8 178 8 07.2 182 9 96.0 215 8 77.0 244 4 61.0 254 | 14 38.1 283 5 30.8 337 || LON7523 351} 11 58.5 376 5 59.4 393 | 12 47. 408 3 99. 444 4 00. 76 | 12 64. 502 1 64, 510 |— 0 36. Oo Re wo i ies fein Ieee, RR to OQ Mow WSO OW SSS OF VV OM (Se) meow = wo mw i ew) Se 02 09 ro CO co co cee Oo) Wie POS NM SO Oe i) 0 ~ aeieteds © ex Ne COR CRA AW oom oo a5 wo rw wo — ~ BI) Soe) ea Se au or aw 40 57 52.5 |-+ 1 17.2 Corrections. Half-sum of 5 Chas Latitude. declination. Meron rae and refr. | “© 7 4 “ “ ou “ 40 64 32.7 |— 5 22.8 |1.4 | 40 59 08.5 52 14.7 |+ 6 55.4 |—2.0 08. 1 62 03.7 |— 2 54.9 |—2.9 05. 9 68 40.4 |— 9 31.0 |-1.8 07.6 65 47,8 |— 6 38.2 |—1.9 07.7 64 43.4 |— 5 34.1 |—1.6 07.7 70 04.6 |—10 53.9 |—3.5 07.2 68 30.3 |— 9 23.6 |—1.1 05. 6 65 37.0 |— 6 29.7 |—1.7 05. 6 53 34.9 |+ 5 34.8 |-2.4 07.3 53 39.7 |-+ 5 30.8 |—2.7 07.8 54 27.3 |-+ 4 44.1 |—2.0 oN 64 25.7 |— 5 17.8 1 06.8 63 23.2 |— 4 15.7 60 21,7 |— 1 12.8 2 08. 7 56 28.1 |+ 2 40.4 9 06. 6 62 47.5 |— 3 36.3 7 08.5 62 41.4 |— 3 29.9 5d 22.8 |-+ 3 50.9 64 38.0 |— 5 27.0 53 36.4 |+ 3 33.3 . 1 | 40 59 07.6 448 ASTRONOMY. Observations and computations—Continued. JULESBURG, COLORADO. Level. Corrections. Number | Microm. Half-sum of 5 Date. of star. | readings. Remarks. | Geclination. Mice Latitude. N. Ss. saatrete Level 1874. Ee Rel pec) ee re Ue 6 (cea October 10 .. 535 13 36.7 | 31.3 | 10.2 40 57 28.5 |+ 1 42.9 |—3.3 | 4059 08.1 564 4 94.0 | 32.0| 9.8 52 00.7 |+ 7 07.8 |—3.1 05.4 572 | 16 03.7 3.3 | 38.7 610 6 11.4 | 25.2 | 16.9 58 27.9 |+ 0 44.8 |-4.8 07.9 620 15 69.2 | 27.0 | 15.0 64 36.0 |— 5 24.3 |—3.9 07.8 632 7 7127 | 6.5) | 30.3 October 11 .- 8146 | 14 52.2 | 22.4 | 17.0 | Cloudy. 8162 373.1] 9.6 | 30.0 52 14.9 |4+ 6 56.0 |—3.5 07.4 8293 0 07.9 | 21.0 | 18.6 8314 17 01.6 | 9.3 | 29.8 70 04.8 |—10 52.9 |—4.2 07.7 146 11 75.0 | 18.0 | 22.0 164 5 01.9 | 28.0 | 12.2 63 23.4 |— 4 19.5 |4-2.7 06.6 178 8 05.4 | 22.6 | 17.3 182} 10 01.8 | 23.5 | 16.6 60 21.9 |j— 1 15.7 |42.8 09.0 215 9 03.2 | 32.0 | 7.0 244 4 99.0 | 12.2 | 28.5 56 28.3 |4+ 2 35.8 !42.3 06. 4 254 14 78.5 | 12.0 | 29.0 62 47.7 |— 3 41.7 |4+2.1 08. 1 283 5 06.9 | 16.0 | 24.6 337 | 10 67.5 | 29.5 | 12.0 62 41.6 |— 3 36.1 |42.1 07.6 351 11 22.1 | 26.5 | 14.0 376 5 39.5 | 16.0 | 25.0 55 23.0 |+ 3 44.6 |4+0.8 08. 4 Hazy. 444 4 55.8 | 23.2 | 17.7 476 | 13 23.0 | 13.9 | 27.7 53 36.6 |+ 5 34.2 |—2.0 08.8 502 1 66.0 | 26.8 | 14.0 510 |— 0 25.0 | 15.7 | 25.8 57 52.8 |+ 1 13.6 -+0.6 07.0 535 10 95.2 | 20.0 | 21.0 572 13 52.8 | 20.3 | 21.3 57 28.7 |+ 1 39.3 —0.5 07.5 610 6 35.5 | 21.3 | 20.2 58 28.1 |+ 0 41.1| 0.0 09. 2 620 15 94.8 | 20.2 | 21.6 40 64 36.3 |— 5 28.7 |—0.6 | 40 59 07.0 632 7 42.1 | 20.4 | 21.6 For the final result of latitude, the pairs 8173 and 8182 and 564 and 572 are excluded, on account of the star positions. The probable error is derived from the single observations belonging to one pair and the mean taken froin 23 individual results. ASTRONOMICAL CO-ORDINATES OF ASTRONOMICAL STATION AT JULESBURG, COL- ORADO. Longitude..... 62 49™ 268,15 + 0.029 or 102° 21/ 32.30 + 0.43 west foom Greenwich. Longitude....- 1» 41™ 148,03 or 23° 18! 30/.50 west from U. 8. Naval Observatory, Wash- ington, D. C. Latitude .....- 40° 59/ 07.63 + 0.04 north. U. 8. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN, 1st Lizut. GEO. M. WHEELER, Corres or Enainerrs, U.S. ARMY, IN CHARGE. RESULTS Or OBSERVATIONS MADE BY DR. F. KAMPF AND JOHN H. CLARK IN THE DETERMINATION OF THE ASTRONOMICAL CO-ORDINATES OF NORTH PLATTE, NEBRASKA. SEASON OF 1874 COMPUTATIONS BY Die ws; AIS Ae ME 29 AST 449 | Th TRE ZAOVE RISO PATAAI CED Ee wii: rth, Peary ae eG PROP AMT JITAIY PYaCA Wes 4 NORTH PLATTE, NEBRASKA. GEOGRAPHICAL POSITION OF STATION. Longitude, . . . 100° 45’ 53.14 + 0.95 west from Greenwich. Latitude, . . . 41°08’ 18.33 + 0.06 north. Altitude of observatory above sea-level from railroad surveys, 2789.0 feet. North Platte is one of the principal stations of the Union Pacific Rail- road, and possesses a population of three or four thousand. On the west side of the town, in the center of the military reservation, the astronomical station was fixed. The adjacent country is level and better fitted for agriculture than the western part of the State. North of the town, distant two miles, is the Platte River, flowing from west to east. METEOROLOGICAL CONDITIONS. The weather was fair until the night of October 17. Then the rainy season commenced, compelling the relinquishment of all observations. The ensuing storm continued for three weeks without intermission. The observatory, instruments, and instrumental values were the same as at Las Vegas. For transmission of signals to Ogden the use of the wire of the Atlantic and Pacific Telegraph Company was kindly granted by the superintendent at Omaha. The local battery at North Platte and a repeater at Cheyenne were employed. The length of circuit, from North Platte to _ Ogden, was 738 miles. The astronomer at this station would express his obligations to Captain Mills, in command of the military post, for the assistance rendered by him in erecting the tent and building the monument. 451 452 ASTRONOMY. CONNECTIONS.—OBSERVERS.—COMPUTERS. The longitude was determined by three exchanges with Ogden on October 15, 16, and 17. Observations for latitude were taken on the nights of October 15, 16, and 17. Mr. John H. Clark was observer at Ogden, and Dr. F. Kampf at North Platte. All computations were made by the latter. Tabulation of stars used for determination of time at Ogden, Utah, and North Platte, Nebraska, 1874. NORTH NORTH OGDEN. PLATTE. OGDEN. Sn. ee -—~——— Name of star. Sls) 5 SSisis Name of star. Ses Sisco B|5| 3 |3)8/8/8 ARG 222 /2/2/2/2 P=)) Fey) | ey | |) Hey) Pes) oI S616 |S|S/S/6 S|S16 |é|6lé\6 Gh, IWS BES) csoosconnses éocess cece X|X| X Bal foe] oe Ch fa oe ee eons nosalsc a6] 25 bal see eee oS =ellee ces x 12-Year Catalogue, 1879 .-..}.- Pel foe bl [p< Bal bc WY.) NS) poaceiceaces saneSeos ae x|X| X 3 Fal Bal GUS OV Gite Song aeesae Beoscecaal [as PAGO ee eee ganas cesalles x eo lealeabee ke YAquile.c) 232 s2 22 seeeseeee esi bx <|ps|oe.lloc s Y ANGIE) 5. o5ecnscade caatoocs< X|X| X |--|--]X]--]] § Aquarii-----..----.---.-.-. SAIS)| se |lo2]|= we tT Aquilee SSeeeaeao ei eleoe sel[osi} as ainel Ds TIME DETERMINATIONS. 453 Observations and reductions for time taken at sending station. NORTH PLATTE, NEBRASKA, OCTOBER 15, 1874. a I Name of star. as Aa. Bb. Ce. due AR. AT. 3) is, ts ee Gb 8. 8. Tina: nes fon Gs EB UL Be aC Weaiae Aquiliel<-o- -=- 19 47 51.66 |— 0.80 0.00 |— 0.31 |19 47 50.55 |19 58 00.96 | + 10 10.41 B60) Aquilees---2---- 54 41.14 — 0,94 |— 9.05 |— 0.31 54 39.84 |20 04 50.25 10. 41 ES) 3lo Cyeni------ ---- 95 31.00 |+ 0.18 |— 0.14 |— 0.45 59 30.59 09 40,94 10. 35 E. | @ Capricorni --.-./20 00 57.18 |— 1.17 |— 0.08 |— 0.32 |20 00 55.61 11 06,03 10. 42 E. | « Cephei-----.--- 02 51.66 |+ 3.79 |— 0.70 |— 1.40 02 53. 35 13 03, 87 10, 52 Bee (Cypnitecs sss... 07 33.92 |— 0.04 |— 0.30 |— 0.40 07 33.18 17 43.74 10. 56 Bi. |e. Cephers. .-.- =<. 17 18.10 |+ 1.11 |— 0.53 |— 0.67 17 18.01 27 28. 40 10. 39 Be bo Delphinite..-—-- 21 31.08 |— 0.66 |— 0.25 |— 0.32 21 29.85 3! 40.33 10. 48 Wailas “Aquarii®=--..2-- 30 44,14 |— 1.11 |— 0,16 |+ 0.31 30 43.18 40 53. 66 10. 48 Weal -Aquarit:---.- 35 44,26 |\— 1.10 |— 0.16 |+ 0.31 35 43.31 45 53.78 10. 47 W. 12-Yr. Cat., 1879 42 56.30 + 5.14 |— 0.99 |4 1.79 42 02.24 52 12. 66 10. 42 W.| 61 Cygni-......-.--. 51 06.42 |— 0.10 |— 0.25 |4. 0.39 | 51 06.46 [21 01 17.03 10. 57 Walliz Cyoni-es =~ -.| 59 36.92 |— 0.11 |— 0.25 |4 0.39 59 36.95 09 47.49 10.54 W.|a Cephei...-...-- 21 05 23.66 |+ 1.07 |— 0.36 |+ 0.66 |21 05 25.03 \21 15 35.47 | + 10 10.44 NORMAL EQUATIONS. 0=— 439+ 14.00 dt— 3.73a+ 1.06c¢ 0=-+ 37.56— 3.73 dt + 24.70a+ 9.45¢ a=— 15.408 O=-+ 37.07 + 1.066¢-+ 9.454 -+ 76.87 ¢ ¢ =— 05.308 NORTH PLATTE, NEBRASKA, OCTOBER 16, 1874. & EI Name of star. is Aa. Bb. Ce: TH: AR. AT. S) hm. 8 8. 8. 8. hm 8. eames? Me. 8: E.|7 Aquile......... 19 47 51.16 |— 0.66 |— 0.16 |— 0.32 |19 47 50.02 |19 58 00.95 | + 10 10.93 iH: | 0) ] Aquile.-..---- 54 40.64 |— 0.78 |— 0.20 |— 0.32 54 39. 34 }20 04 50.23 10. 89 E. | 3lo Cygni .---..-.--. 59 30.54 |+ 0.15 |— 0.39 |— 0.46 59 29. 84 09 40,91 11. 07 EB: |x Cephet =... -- 20 02 51.94 |+ 3.13 |— 0.96 |— 1.45 /20 02 52. 66 13 03.76 11.10 E. | y 07 33.48 |— 0.03 |— 0.34 |— 0.41 07 32.70 17 43.72 11. 02 W.| 6 17 16.28 |-+ 0.92 |— 0.57 |+ 0.69 17 17.32 27 28.35 11. 03 w.| 8 Q1 29.74 |— 0.55 |— 0.27 |+ 0.33 21 29, 25 31 10.32 11. 07 W.| a 26 58.20 |-+ 0.10 |— 0.36 |+ 0.45 26 58.39 37 09.53 11.14 W./e 30 43.40 |— 0.92 0.15 |+ 0.33 30 42. 66 40 53. 64 10, 98 W.| ze ii 30 43.62 |— 0.91 |— 0.13 |+ 0,32 30 42.90 40 53.76 10. 86 W. 12-Yr. Cat.,1879.| 42 56.24 |+ 4.25 |— 0.72 |4+ 1.85 42 01.62 52 12.53 10. 91 iWin | GL Cyonies =. === 51 05.68 |— 0.08 |— 0.16 |+ 0.41 51 05.85 /21 01 17.01 11.16 10 xs CORP esoies e-| 57 26.16 |— 0.27 |— 0.14 |— 0.37 Gy) Pan ste| 07 36.31 10. 93 eae Cephel!..---.5--- 21 05 24.86 |-+ 0.89 |— 0.40 |— 0.68 |21 05 24.67 [21 15 35.43 | + 10 10.76 NORMAL EQUATIONS. O=— 5464 14.00dt— 4.50a— 1.11e 0=-+ 20.65— 4,50 dt-+4+ 24.06a+4+ 8.51e a=— 15.165 0=+ 31.43— 1.11dt+ 8381a+477.53¢ c =— 05,319 454 ASTRONOMY. - Observations and reductions for time taken at sending station—Continued. NORTH PLATTE, NEBRASKA, OCTOBER 17, 1874. NORMAL EQUATIONS. O=+ 0.084 11.00dt— 4224+ 1260 0 = —13.57 — 4.22 d¢-+23.15a-+ 6.24¢ O=+23.09-+ 1.26 dt+ 6.24a-1 69.980 r¥ 2 Name of star. I Aa. Bb. Ce. Te AR. S) lds Gls 8. Bs ch hem. 8. hk. m. 8. B28 Aquilesee-s=-22- 19 30 07.48 |+ 0.32 |— 0.10 |— 0.25 |19 30 07.45 |19 40 17.85 Ba) eAquileaee-seeene 34 29.46 |-+ 0.33 |\— 0.17 |— 0.25 34 29, 37 44 39.89 E. |e Draconis ....-.-| 38 26.16 |—.0.89 |— 0.56 |— 0.71 38 24.00 48 34. 49 Raph) (Gypnimeeee ee aes 42 13.28 |— 0.19 |— 0.40 |— 0.40 42 12.29 52 22.98 Boi Aqnilsjeeee=-- —= 47 50.36 |-++ 0.35 |— 0.22 |— 0.25 47 50.24 58 00. 93 ae) Aquilae =ss- a= 54 39.54 |-+ 0.41 |— 0.22 |— 0.24 54 39.49 |20 04 50. 22 |b liosC yoniiees ee a= = 59 30.92 |— 0.08 — 0.47 |— 0,35 59 30. 02 09 40.89 Wally (Cyeniees-se--° 20 07 32.98 |+ 0.02 |— 0.42 |4- 0.32 [20 07 32.90 17 43.70 Waillds eCopheieessa--s 17 18.22 |— 0.48 |— 0.63 |+ 0.53 17 17.64 27 28.31 W.| @ Delphini.--.-..- 21 29.48 |+ 0.29 \— 0.23 |+ 0.25 21 29.74 31 40.30 Wallan Cyonitees--c aoe 26 59.04 |— 0.06 — 0.40 |+ 0.34 26 58. 92 37 09.50 Weaie -Aquanice--=-2 30 42.46 |+ 0.48 — 0.16 |+ 0,25 30 43. 03 40 53. 63 Wal. Aguariize sense 35 42.70 |+ 0.48 — 0.16 |+ 0.25 35 43, 27 45 53.75 W. 12-Yr. Cat., 1879.|20 43 03.98 |— 2.23 — 1.35 | 1.41 20 43 01.81 |20 53 12.40 NORMAL EQUATIONS. 0 = — 2.72 + 14.00 dt — 2.05a— 3.70¢ 0=— 6.70 — 2.05 dt + 18.95 a + 18.29 ¢ a=- 08.612 0=+ 4.82— 3.70 dt + 18.294 + 62.52¢ ce = — 03.243 NORTH PLATTE, NEBRASKA, OCTOBER 18, 1874. z g Name of star. Tt Aa. Bb. Ce. T. AR. 3) Reames: 8. 8. OW Ws oe Oh Ne We Ge eAquilss seems 19 54 38.86 |+ 0.51 |— 0.08 |— 0.40 |19 54 38.89 [20 04 50.20 Be) eloiCyonipos==ese5 59 30.50 |— 0.10 |— 0.17 |— 0.58 59 29. 65 09 40. 86 He) Cephei=----=--- 20 02 56.59 |— 2.03 |— 0.44 |— 1.84 )20 02 52.28 13 03,54 Bey? Cyoni 225-5 -25- 07 33.04 |-+ 0.02 |— 0.17 |— 0.52 07 32.37 17 43.68 Es|| (2) @epheleeens == 3. 17 18.96 |— 0.60 |— 0.30 |— 0.87 17 17.19 27 28.26 K.| B8 Delphini......-| 21 29,22 |+ 0.35 |— 0.15 |— 0.42 21 29.00 31 40.28 Welle, eA quarili sss so. 30 41.60 |+ 0.60 |— 0.13 |+ 0.41 30 42. 48 40 53. 62 W| cee Quariiieenyeoee 35 41.64 |+ 0.59 |— 0.10 |+ 0.41 35 42.54 45 53.74 Ww. 12-Yr. Cat., 1879.} 43 01.74 |— 2.76 |— 0.30 |+ 2.34 43 01.02 53 12. 27 WS GE Chee secoeses 51 05.18 |+ 0.05 |— 0.05 |+ 0.51 51 05.69 |21 01 16.97 Wei ¢ (Cypnic=- --- --2- 20 57 24.46 |+ 0.17 |— 0.03 |4+ 0.46 )20 57 25.06 10. + 10 10. 48 59 21 07 36.27 | + 10 11.21 a = + 08,755 c= — 08.403 The corresponding observations taken at Ogden, Utah, will be found in the report on determination of longitude of that station, season of 1874. FINAL RESULTS OF LONGITUDE. 455 The following tables show the corrections and rates of the chronom- eters used at North Platte and Ogden:— CHRONOMETER AT NORTH PLATTE—Nezcus, No. 1344. October October October October Date. 1874, Local sidereal Correction of chro- time. nometer. h. hm 8. 20.6 + 0 10 10,46 20.1 10. 99 20.3 10. 62 20.6 + 0 10 11.23 Hourly rate. CHRONOMETERS AT OGDEN. Necus, No. 1511. Local sidereal Correction of chro- time. nometer. h. hom 8 20. 63 — 0 06 16.972 Hourly rate. 8. ++ 0.0533 October October Date. 1874. 16 17 Signals sent from— |Recorded at— October 15, 1874: Ogden. an... Sati North Platte Ona: uate October 16, 1874: x a orth Platte Ogden..-....... ; Ogden ..... z North Platte North Platte... Ogden ..... October 17, 1874: Ogden... sere North Platte North Platte. .. ; Onten Local sidereal Correction of chro- time. nometer. h. hm. 8. 20. 59 — 0 06 2.49 19. 20 — 0 06 4.26 Final results of longitude. ml Oo rs) o > * os S Mean orale. Time-correc- | Corrected g & F 3 Rael. tions. time. bs bp SS a3 5 A a hm 8. ans 8s Bis 2Y-veay Ge | \Mhel ee Bs 8. 21 43 04.07 |4+- 0 10 10.49 | 21 53 14.56 21 14 35.21 |— 0 06 17.00 | 21 08 18.21 |44 56,35 21 46 45.14 |+- 0 10 10.49 | 21 56 55.63 21 18 16.47 |—.0 06 17.00 | 21 11 59, 47 56. 16 0.19 21 34 51.45 | 0 10 10.97 | 21 45 02, 42 21 06 08.74 |— 0 06 02.52 | 21 00 06,22 5b. 20 2L 38 20.47 |+- 0 10 10.97 | 21 48 31.44 21 09 37.93 |— 0 06 02,52 | 21 03 35.41 56. 03 0.17 21 31 23.99 |+ 0 10 10.65 | 21 41 34.64 56. 00 21 02 43.07 |— 0 06 04.43 | 20 56 38,64 21 34 55.58 |-+ 0 10 10.65 | 21 45 06,23 21 06 14.81 |— 0 06 04.44 | 21 00 10.37 |44 55.86 0.14 Hourly rate. 8. + 0.0801 + 0.0917 Means. 56, 255 56. 115 5d. 930 0b 44™ 565.100 + 08,063 Or, 11° 14’ 01.50 + 08.95 456 ASTRONOMY. Observations and computations for latitude. NORTH PLATTE, NEBRASKA. Level. Corrections. No.of} Microm. __ | Half-sum of — ae. star. | readings. Remarks, declination. Microm Latitude. N. Ss. and ee Level. | Merid. 1874. ta id! d. d. On es ee a u Cp ei October 15..| 7994 |— 2 54.0 | 35.8 | 5.0 8023 | 12 25.0] 4.0 | 37.5 41 17 49.0 | — 9 30.1 |— 0.6 |_......- 410818.3 8106 | 12 66.7 | 17.9 | 24.7 08 20.8 | — 0 04.5 [4+ 1.5 ]..._... 17.8 8173 2 88.1 | 17.3 | 25.8 02 04.7 | -E 6 12.7 |e 2.0 |ooceece 18.5 8182 | 12 55.0 | 28.2 | 15.0 : 8195 8 82.6 | 25.8 | 17.0 8223 9 47.5 | 22.0 | 21.4 08 41.5 | — O 25.0 |4+ 2.2 |.-_.... 18.7 8237 4 94.5 | 20.0 | 23.5 05 48.8 | + 2 29.6 |+ 1.2 |...... 19.6 8268 3 36.0) |S), G22 12 07.5 | — 3 49.7 |4 1.6 }....... 19.4 8282] 17 97.8 | 36.7] 7.0 21 30.5 | —13 13.2 |4+ 1.3 |....... 18.6 8324 |— 2 59.8 | 10.0 | 34.0 16 | 18 31.0 | 34.2 | 10.1 67 0 68.8 | 10.5 | 33.8 19 37.4 | —11 19.4 |4 0.2 ]....... 18.2 100 8 84.0 | 21.3 | 23.0 14 18.6 | — 6 01.0 |4 2.2 ]....... 19.8 152] 13 31.2} 21-3 | 23.6 17 10.6 | — 8 53.3 |4+ 2.0 }......- 19.3 173 |— 0 52.2 | 28.0 | 17.0 215 | 13 68.1 | 16.0 | 28.3 254 5 11.1 | 28.0 | 16.8 02 48.7 | + 5 30.4 |— 0.3 |.....-- 18.8 412 4 20.2 | 32.3 | 12.2 05 20.5 | + 2.59.9 |— 0.2 }......- 20.2 444 | 17 68.5 | 31.0 | 14.3 14 00.2 | — 5 39:8 |— 0.9 |-----.- 19.5 453 8 87.0 | 12.3 | 33.0 487 | 16 92.0 | 35.9} 9.8 516 1 42.0 | 12.3 | 33.4 18 16.8 | — 9 57.5 |+ 1.1 |......- 20. 4 540 378.5 | 40.3] 5.3 76 | 1108.9} 7.2) 38.7 03 36.8 | + 4 41.5 |+ 0.8 |......- 19.1 658 9 49.0 } 31.7 | 13.9 666 3 70.4 | 11.3 | 34.0 12 03.8 | — 3 43.1 |— 1.1 |..-.-..- 19.6 691 7 93.3 | 34.0 | 11.0 715 | 11 62.1 | 16.0 | 29.6 10) 3852))| — 22251 | On ON ee 18.3 731 5 10.7 | 14.0 | 31.3 06 28.9 | + 1 48.9 |4 1.3 ].---..- 19.1 October 16..| 7856 3.13.0 | 17.7 | 19.0 7902 | 14 67.0 | 19.7 | 17.5 15 42.4 | — 7 24.9 |4 0.2 ].---... ely! ELE |) ABV RAE) BY Gre lacsose 01 48.2 | + 6 33.8 |— 3.3 |.------ 18.7 7932 APS008)|ea--5 44.7 05 38.9 | + 2 42.4 |— 4.1 |.----.- 17.2 2962) LOV8IS0) Pen a-s 46.4 7972 8 66.7 | 19.0 | 18.0 7976 | 14 43.0] 6.5 | 30.0 04 38.4 | + 3 42.2 |— 5.1 |.----.- 15.5 7984 472.6| 9.6 | 27.0 10 50.7 | — 2 31.9 |— 3.9 |------- 14.9 7994 1 20.4 | 31.2) 5.0 8023 | 1351.21 1.1 | 36.0 41 17 49.1 | — 9 27.3 |— 2,0 |..--- - -| 41 08 19.8 457 LATITUDE DETERMINATIONS. Observations and computations—Continued. NORTH PLATTE, NEBRASKA. Ps _ “isd O11 O19 GG AR —) st AO — or So 1D 4 m0 Sr) 4 i} “Se ag ne 1S OOS 3 ao St ca) ey ey = ee) y on one a i=} ae re b aoe | A re = re re A a = re Rr ae - ere re hal aS ~ 2 8 Sowal — 4 os ~~ o . ' oF ' ‘ ' . ' ' ‘ ‘ ‘ ' ' vot ' ' ' ' ' ee aS etue? mie : mo : ‘ : ' oh of + 8 : tt ran : Ne Sedat ee naar ian ' ees a : ie Skeet iat H rat 14 ; i=] nie 4 "eoy) ' oe ' ' (ie ‘ ‘ ' ‘ it Aj ' » Ih as ' oO heey Dean rh U ' ny wit ‘ . ty ' ' ' ' Me ' mh thi . = ‘ ia he aes i Bounds : Ho aed ! so Gee ae her g to on a we _ 00 COR HO a) 4 m4 19 ra) NX ~ © no 4 ON oars) 4 & © ~ As oS aS a Ss 6 05 a nS cd ak Ss ss ss a 5 o 3 ra aoe | + | ++ (of feo Se es Se i serie eee iI 5 “9 Xo no OR ~~ On R mn OO Jo) om mw © on at cn x Ron) = o as Toa Ai Qos Ss ates Ss oS 6h Ss o st iS 1S Se sx iy On on NOD 1D nr Cow oo or) AS \ AS ate Stemi meet sae ste tel [oe toe eel [ee | She | scicaeee “ateal | Sa . Sa ho MO oO OD o o no r—) Sy ey S se oy Aa OD = 8-2 ~ as cae rs ~ BS oo a so y xo x color) a (colar) BS ey 53 Ao ba on oo boolion! a zs Xe al of ie] Co oO GR = sO cite} = aq ~ DR O19 Qn oa tb R RQ 1.9% oo o xs oo 12 Pie) i) > Gals oo oo mQN onl nae Oo i=) or el o Oo iI La) re oo on hon ag o = fs om = ; NOS MON BND MS COD SH OH MND GOS SS SOM NOD QAR NOSSO Oro om = wn Sai cis Aga soe st Ast OS 40 SSH XH AS HHH Wed Be Ost ons as oO (Selinc a Hoc) SQ NN Ae A No Se OR ANH Ae eee As OR cs [ee a eo ee ere ea a an a ee a eS S| , OAD SHS DOW NG MOT AH HS BOW aey rm OWI Nat Mo TOO NOW SO s » ta 4 elloc! sas S fd dos oo aes) asa Ro w~aw cus oe | eer | adres | eee CC Ee Serer oleae oO eiebr ae ee ee ee ee dé (Ot HOR FARE ©O HOM OH ASO HOF NN HPO AHA COS HO ATH HHO AO 1D = yeah A CCA weet Aa see mictap. AcisUNe a a taf co ctalte: “a teWiishaid Galo AG on Sth wl ope att re (co wiley) HO oat HS Het SS HD SHS ES Ser FISH Her BH HON HH RR oe S53 BS ABA SS SES BK FO GBH BE AGH ADH SEN HH SHH HOH HH Sue} WANN DAY Sm H RO QON MH RH MHD HH MO BON OAH Mw WAS ONAN OCD So bon! Saal nr hal ne al er bal al Les | Load hl ce hol rr bol i i) (ee eS Sol Su CMR WHMre ORNs ona t+ Me NAHM KPO SCH FDO BHF ON FRR NOT WH 33 oe@ Shh gaa 75 SSE RR RB S38 Gs 35 EBS BRE BE ARR SES Ss oi DDD DHD DOO : % Be RRR RRB ae} Date 1874. October 16. October 17. 458 ASTRONOMY. Observations and computations—Continued. NORTH PLATTE, NEBRASKA. Level. Corrections. . No. of | Microm. |——~———_ pe ea S 0 0 . Date star. | readings. Remarks. declination. Micron . Latitude. N. Ss and refr, | Level. | Merid. 1874. t. d. d. d. Os Bee OY ss Li | (ott dae te lL October 17_.| 8106 | 12 64.0 | 12.€ | 24.8 41 08 21.2 | — 0 04.7 |4 0.5 |..._...| 41 0817.0 8173 2 85.6 | 13.8 | 23.9 02 05.0 | + 6 12.4 |4+ 0.9 |._..... 18.3 8182 | 12 51.7 | 25.8 | 11.7 8195 9 02.1 | 17.8 | 19.3 8223 9 63.3 } 24.0 | 13.5 08 41.9 | — 0 25.5 |J4+ 2.1 |....... 18.5 8237 5 19.0 | 23.0 | 15.0 05 49.2 | + 2 27.6 |4+ 1.7 |..... 18.5 8268 5 21.1 | 24.0 | 14.0 12 08.0 | — 3 49.7 |+ 0.5 |_.....-. 18.8 8282 | 19 89.4 | 24.6 | 14.0 | 25¢ p.m. 21 30.8 | —13 15.7 |+ 0.7 |+ 0.1 15.9 8324 |— 0 74.7 | 15.8 | 23.4 16 | 17 87.0 | 21.2 | 18.3 67 0 19.8 | 19.7 | 20.0 19 37.8 | —11 21.3 |+ 0.6 |....- 17.1 100 8 90.0 | 21.0 | 18.0 14 19.1 | — 6 05.3 |+ 4.3 |..... 18.1 152 | 13 38.5 | 21.2 | 18.2 17 11.1 | — 8 58.1 J+ 4.3 |.....- 17.3 173 |— 0 57.4 | 27.3 | 11.8 283 | 13 42.2] 4.8) 33.2 337 4 75.1 | 38.7 |—0.4 02 43.0 | + 5 34.3 J+ 2.5 |...2..- 19.8 368 3 91.2 | 17.4 | 20.0 387 | 13 27.0 | 23.0 | 15.2 14 55.7 | — 6 39.3 |4 1.2 |._..- 17.6 412 4 45.6 | 18.1 | 20.5 05 20.9 | + 2 55.5 |4+ 1.9 ]..... 18.3 444] 17 93.3 | 18.8 | 20.6 14 00.7 | — 5 44.1 |4 2.0 |...... 18.6 453 9 00.9 | 24.9 | 14.5 487 | 16 18.8 | 23.2] 15.8 516 0 54.1 | 27.0 | 12.7 18 17.3 | —10 03.2 |4 5.0 |....-..- 19.1 540 4 49.2 | 19.6 | 20.2 576} 11 75.0 | 22.3 | 17.9 03 37.3 | + 4 39.8 |4 0.9 ]_...-.- 18.0 647 | 13 46.1 | 17.2 | 22.3 04 54.1 | + 3 22.1 [+ 3.5 |----.-- 19.7 658 8 21.8 | 30.0] 9.7 666 2 25.7 | 20.0 | 19.5 12 04.2 | — 3 49.7 |4+ 4.8 |--....- 19.3 691 8 28.8 | 16.6 | 23.0 715 | 12 03.7 | 30.5] 9.2 10 38.6 | — 2 24.5 |+.3.5 |--..--- 17.6 731 5 52.2 | 30.6] 9.5 41 06 29.4 | + 1 46.6 |4+ 3.4 ]-.-.... 41 08 19.4 For the method used in deriving the result for latitude, see the report on Julesburg station. ASTRONOMICAL CO-ORDINATES OF ASTRONOMICAL STATION AT NORTH PLATTE, NEBRASKA. Longitude.. 6® 43™ 038.54 + 08.063 or 100° 45/ 53.14 + 0.95 west from Greenwich. Longitude.. 1" 34™ 515.42 or 23° 42/ 51/34 west from U. 8. Naval Observatory, Washing- ton, D. C. Latitude... 41° 08! 18.33 + 0.06 north. U. 8. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN, ist LizuT. GEO. M. WHEELER, Corps or ENGINEERS, U. 8. ARMY, IN CHARGE. APPENDIX TO PART J, VOLUME I, COMPRISING 1.—REPORT OF OPERATIONS AT SALT LAKE OBSERVATORY IN 1873 -.-......-.-- J. H. CLARK. 2.—DESCRIPTION OF OGDEN OBSERVATORY AND ITS SURROUNDINGS..LIEUT. WHEELER. 3.—DESCRIPTION OF PERSONAL-EQUATION APPARATUS, WITH RESULTS OF OBSERVA- TIONS FOR RELATIVE PERSONAL ERROR......---...---.---------------- Dr. F. KAMPF. 4,—LIST OF POSITIONS OF ASTRONOMICAL STATIONS, WITH DESCRIPTION OF LOCA- TION, &c. .-..--. Spasop ceSSoo beweed SecEOpBoOonD dkon choo sao seo cpogSoeuseae LIEUT. WHEELER. 459 \ te ' ‘ e 4 on f es i a (a rT TANS . ~ 7 : ; a Na > f cae ee ae a 7 ee 4 — = - a y 2. Ooue> Jr eee 2 tp “cence? ae? crf pes} ; i aoe vite a “+ le? ida ‘PGE TP Ti ney Oru? chr her ter Egress < ieee ae eo i SSE : i atest Crit A RE ee ‘ tp |! i ar 7: oe = =e PE EPS @ ehas® 7 - “a ACS - a GEOGRAPHICAL POSITION AND SURROUNDINGS. 461 Unitep Srates EnGineer OFFice, GerocRAPHicaL Surveys West or THE 100TH Merrpray, Washington, D. C., March 1, 1874. Sir: I submit herewith a report of astronomical observations made during the season of 1873, at the main or receiving station, Salt Lake City, Utah. GEOGRAPHICAL POSITION OF STATION. The Salt Lake City observatory, belonging to the Mormon Church, was occupied as the main or receiving station, and with it all the primary astronomical points, except Bozeman, Montana, were connected telegraph- ically for difference of longitude. It is situated in Temple Square, about one hundred feet from the south- east corner, than which no position more objectionable could have been selected for such a purpose. PHYSICAL SURROUNDINGS. By its location the observatory is subject to the dust and smoke of the city, the noise of travel in the adjacent streets, and, worst of all, to the heavy concussions to which, from its construction, the Temple is subject. It is so hemmed in that from the position of the instrument nothing terrestrial can be seen but the top of a distant mountain, by which the city is bounded to the northward. In the south there is no horizontal view possible in con- _ sequence of the interposition of the wall of the Temple yard. Eastward this wall again shuts off the prospect, but to the west there is an open view past the Tabernacle and over the trees and house-tops to the Great Salt Lake and the adjacent mountains. 462 ASTRONOMY. Among the first settlers of the Salt Lake Valley there is a common opinion that the rains are now more abundant than in former times, and the cause is attributed to the growing of trees, and the introduction of the telegraph wires and railroad track. There are probably no sufficient data for such a conclusion, especially as regards the telegraph and railway. However, the meteorological record taken at my astronomical stations for the years 1872 and 1873 favors the popular notion, and shows a cumulative amount of moisture, cloudy weather, storm, and rain. On several occasions during this season it was not possible to accom- plish a complete set of observations on any one night for a week at a time, in consequence of the clouds and rain, and there was one feature about this weather which was especially unfavorable for astronomical work. This was that atmospheric condition in which the sky would become cloudy and remain so during the night, while through the day the sun would dispel the mist and shine with its wonted power. The heaviest rains occurred in the afternoon, accompanied in most instances with many electrical phenomena, and showers in full sunshine were quite frequent. These storms, unlike those of the previous season, came from every quarter, and not alone from the south and west, which are believed to be their prevailing direction dur- ing the summer months. There were seven cloudy nights in June, of which four only were of such a character as to prevent all observations. July 10 and 11 were slightly cloudy ; July 20, 21, and 22, quite so; for the rest of the month there was no obscuration of the heavens whatever, the nights being all that the most ardent observer could desire. August 3, 8, 9, 10, 11, 12, 21, 22, 23, 29, 30, and 31, twelve days in all, were more or less cloudy. On Sep- tember 1, 2, 3, 15, 18, and 27, six days only, observations were impossible. The first week in October was clear; in that time the difference of longitude between Salt Lake City and Ogden observatory was determined, and then the latter place was occupied as the base for astronomical observations. DESCRIPTION OF OBSERVATORY. The observatory consists of a double house, one enveloping the other. The inner one of these is of frame-work, and was built by the United DESCRIPTION OF OBSERVATORY. 463 States Coast Survey; the outer is of adobe material, and was constructed by the Mormons. The observing-room presents a space of about ten by fifteen feet and is supplied with two stone pillars, on the western one of which the transit was mounted, and the observations in connection with the various stations of the season were made. The openings in the roof over the east- ern pillar are sufficient for latitude work only, and over the western block they extend no farther than the eaves. This arrangement is enough for the purposes of the owners, as they make no other use of their transit than to get the time by the sun, but it is insufficient for complete astronomical work. The pillars are solid blocks of sandstone, pretty well dressed, par- ticularly the western one. They are firmly planted, and, considering the surroundings, stand remarkably steady. Two soldiers of the Engineer Battalion, Looram and Kirkpatrick, were detailed to assist me and keep a meteorological record. I found them intel- ligent and attentive to their duty. After a few weeks Kirkpatrick was put in service with Mr. W. D. Wheeler at the Ogden observatory and else- where, while Looram remained and rendered all the assistance required. All connections were made over the Western Union lines of telegraph, except with Green River, which was by way of the Deseret of Utah and the Atlantic and Pacific, and with the secondary stations at Provo and Richfield, which were also connected by the Deseret wires. Mr. Dougall, of the Deseret office, directed or personally performed all the operating done with these and the Atlantic and Pacific wires, while Mr. W. P. Baker, a very efficient operator of the Western Union office, did the telegraphing necessary over this line. At times, when the regular incumbent could not be present, Mr. Oscar G. Sawyer, one of the oldest and most expert opera- tors in the country, gratuitously supplied his place. It is but a small tribute to the many gentlemen of ‘the telegraph lines with whom I have been brought in contact while on duty with your expedition, to say that without exception they always afforded me every facility in their power, _ although many times it caused them annoyance and interruption, especially when they were pressed with overland business, which was often the case. Transit—The transit used was the Wiirdemann, No. 19, which belongs to the Ogden observatory. Its focal length is 31 inches and its aperture 464 ASTRONOMY. 24 inches. Originally it had nine wires, but four were broken or were so indistinct that they could not be used in observations. The remaining five were fortunately adjacent, but, since they were on one side of the dia- phragm, they had to be adjusted to the central positions. Making observa- tions with this instrument by means of electro-magnetism is unnecessarily tedious, as its equatorial intervals are 23 seconds. The bearings of its axes are a little worn and the illumination is somewhat imperfect; otherwise, it and its appurtenances are in good order. Chronograph.—The observations were made and recorded by the instrumentality of a local battery and chronograph. A description of this machine is given in the report upon the determination at Cheyenne.* It was run with much less trouble than during the previous season, owing partly to a better knowledge of the workings of the instrument and partly to the improvement which it had undergone. For field-work it should be further improved by covering the axes of the wheels so as to exclude the dirt. On this account I found it necessary on several occasions to take it to pieces, which is a troublesome job in itself, besides necessitating a readjustment of the spring balances for the proper movement, an operation that requires no little time, patience, and skill. A weight of 150 pounds was used, although it is quite probable that the spring would vibrate with more regularity and would altogether act better under a greater driving power. Still I was afraid to apply it, even though the cord was iron, having a vivid recollec- tion of the perplexities that befell me in this line during the previous season. The ordinary glass pen, so universally used in connection with the chrono- graph, is a great nuisance, failing very often at a critical moment. Dr. Kampf has substituted a simple but very effective contrivance by which an ordinary writing-pen is made to do this work with great certainty and perfection. Chronometer.—The chronometer that fell to my lot was the Negus, break-cireuit, No. 1511. It was received, corked for transportation, from the hands of Mr. Negus, in New York, and placed in motion only after arrival in Salt Lake City. For the month of June and up to July 4 it had a mean gaining rate of one and three-tenths seconds for every 24 * Published in 1874. DESCRIPTION OF INSTRUMENTS. 465 hours. Then, to July 19, its average rate was four-tenths of a second, still gaining, and from about July 24 till August 28 it had a mean rate of zero, seldom showing in that time a variation in clock-error of as much as one- tenth of a second from sidereal time in 24 hours. From August 20 to August 25 it gained two seconds, whether gradually or by a jump I had no observations to show. Up to about August 31 it again ran with sidereal time. For September and till October 5, when the observations at Salt Lake City were finished, its average gaining rate per day of 24 hours was two-tenths of a second. The electrical current was kept on only while observing, and, so far as I could perceive, did not affect its rate. It went the season through without repair, though occasionally making faint half-second breaks, but not so as to interfere with the reading. The meteorological record will show the temperature to which the chronometer was exposed, but only approximately, for the thermometer was necessarily kept on the outside of the observatory, while the chronometer, being within, was in a much cooler and more equable atmosphere. Battery.—At first I used one of the carbon batteries with which the . astronomical parties were furnished. It is very compact, not liable to be broken, and has the great advantage of evolving electrical power almost instantaneously, but exhausts its force in about twenty hours when worked with acids, as was necessary, thus requiring a renewal at every set of observations. Having burnt out the zincs in a few weeks, I resorted to the form used the previous season, known as the Hill battery. With the fluid that belongs with the carbon battery, it would probably work a season through with but few renewals, and for field purposes possibly be superior to any other form. CONNECTIONS.—OBSERVER.—COMPUTER. The places with which corresponding observations were made for the determination of the differences of longitude were Green River, Wyoming, and Winnemucca and Virginia City, Nevada, occupied by Mr. Maryatt; Georgetown, Hughes, Colorado Springs, Labran, and Trinidad, Colorado, and Ogden, Utah, occupied by Dr. Kampf; and Santa Fé and Fort Union, New Mexico, occupied by Professor Safford. Besides the stations recounted 30 AST 466 ASTRONOMY. above, two connections for longitude. were made in conjunction with Lieu- tenant Hoxie at Provo, Utah, June 1, 2, and 3, and at Richfield, Utah, July 16. The determination of time by Lieutenant Hoxie was with the sextant. With the assistance of Mr. William Looram, I read off during the season all the observations from the chronographic sheets, duplicated them, and made some progress in their reduction. Since that time they have been entirely and finally computed by myself in the office. These reductions, with the circumstances of communication with the connected stations, will be found in the accompanying special reports on those stations. INSTRUMENTAL VALUES. The value of each division of the striding-level used was 1’’.60, accord- ing to Mr. Austin’s measurement, a very satisfactory one, made in 1871. The thread cf the micrometer-screw was broken, but there was no occasion to use it, even if it had been intact. The collimation, as developed by the computations, remained quite constant, showing a mean value during the season of 0°13 plus, clamp east. In its variation it depended much upon the number and positions of the stars grouped in eliminating its value by the method of least squares. The azimuth gave me some trouble, not be- cause of any unsteadiness of the instrument, but by reason of the unskillful handling it received from its owners when they came to regulate their time from observations on the sun. Both chronometric and arbitrary breaks were made use of in the inter- change of signals whenever the wires were working well enough to admit of it. In general there was no trouble in this respect, except at side-sta- tions, like Trinidad, or over a long and poor line, as that to Santa Fé. In such cases we resorted to arbitrary signals recorded by sound. Sometimes it was difficult to get chronometric breaks over the main lines, especially where there was much of what the operators called sympathetic eseape- ment, or when a storm, charged with atmospheric electricity, was bursting somewhere on the circuit. Although the observatory was situated between the city office and all the stations with which exchanges were made, the circuit was nevertheless closed through it. This was a fortunate cireum- STATION AT SALT LAKE CITY. 467 stance, for my operator always required its assistance to make the necessary switches to enable him to call up the various offices, particularly Corinne, Ogden, and Cheyenne, to know if the line could be got, ard, if so, to have them “straighten the wire” and be on hand to adjust the repeaters for the signals. The work of the season at Salt Lake City extended from May 31 to October 5, 1873, and embraced exchanges with four different parties, as already stated. Having so many to respond to, with weather-reports often- times failing, I was necessarily forced, in order to be prepared with clock- error, to observe almost every available night, Sundays included; yet in all this time, though I did not once fail to make the effort, I succeeded in making exchanges but one Sunday night, and those were with the neigh- boring station, Ogden. The difficulty lay in the fact that the operators could not be kept at hand to see that the circuit was closed and the “wire straightened.” Ido not mention this as a matter of fault-finding, but sim- ply to assign the reason for failing to utilize the night which would naturally be supposed to be the best opportunity for astronomical work, it being for business a dies non. I have made a complete and final reduction of all the observations by the method of least squares. They show a very small probable error, and I can say of them that I believe that the longitudes deduced from them will compare favorably with any field-determinations heretofore made under your direction. Very respectfully, your obedient servant, JOHN H. CLARK. First Lieut. Grorce M. WHEELER, Corps of Engineers, United States Army, in charge. US.GEOGRAPHICAL SURVEYS WEST OF THE 1007 MERIDIAN VOL.II ASTRONOMY. JBN) INE dl FRONT ELEVATION nn ar a Proposed Observing Room Hk ABs C Meteorological and Magnetic ) ! Office Scale in Feet ossvasve epi g 40 Uhs Herma, Del, The Graphic Co N.Y. PLAN AND ELEVATION of the ASTRONOMICAL OBSERVATORY at OGDEN,UTAH. ERECTED 1873. ASTRONOMICAL OBSERVATORY AT OGDEN, UTAH. The observatory built at Ogden, Weber County, Utah, has been men- tioned briefly in the report upor the determination of the astronomical co- ordinates of that station. The plan and front elevation of the structure as now completed are shown in Plate I, and also the plan of an additional room intended for me- teorological and magnetic observations. The topographical sketch (Plate II) of Ogden and vicinity has located upon it the position of the observa- tory. The wire of the Western Union Telegraph Company has been con- ducted to the site, and connection may be readily made also with the wires of the Atlantic and Pacific and Deseret lines. Magnetic observations may also be made in the central room, beneath the dome-room, and also in the basement beneath this same space. An additional room, leading to or ad- joining a long hall or gallery for photographic purposes, may be constructed in a position similar to that one shown for the north extension, and thus add, with little expense, to the value of the building as a permanent field- observatory. It had been the intention to recommend its occupation for a complete series of observations throughout the year by an engineer officer, an assist- ant observer, and a detail of non-commissioned officers and enlisted men, not exceeding fifteen, from the Engineer Battalion. The reduction of the Engineer Battalion occurred at or about the date of establishing this observatory, and request for such authority has conse- quently been delayed. Any or all of the force stationed at this point could take service during the spring, summer, and fall months with the expedition 469 470 ASTRONOMY. parties regularly dispatched to regions north and south of the Pacific Rail- roads. It will be noticed from the sketch that four railroads leading toward the cardinal points center at Ogden, ze. (1) Union Pacific Railroad, (2) Central Pacific Railroad, (8) Utah Central Railroad, and (4) Utah Northern Railroad; and hence sending-stations embracing a large field in longitude can be reached from this point, while by the establishment of additional receiving-stations, one near the Sierras and another at the east base of the Rocky Mountains, near the fortieth parallel, telegraphic signals may be interchanged with most of the points at which it will prove neces- sary to determine astronomically longitudes and latitudes in the prosecu- tion to completion of the topographical surveys covering the entire region west of the one hundredth meridian. The Wahsatch range limits the horizon to the east, and crests of mount- ains to the westward of the Great Salt Lake on the west. The northwest arm of the Wahsatch and the Promontory ranges lie to the north and east and north and westward, and the Oquirrh range to the southward. It is to be noticed that, independently of the facilities for telegraphic communication over main lines, a typical point in the Great Salt Lake Basin has been selected at and from which the meteorological conditions of this section of the great interior basin can be studied, and from which surveys of a topographical and hydrographical character may be made to define the conditions of moisture in this part of the extended interior pla- teaux without ocean drainage, and its other physical peculiarities. The point named Observatory Peak is believed to be as favorably situated for an observatory at a high altitude as any of the number of mountain-peaks exceeding ten thousand feet in the entire Western mount- ain region lying in the vicinity of the fortieth parallel. Its accessibility is an element of convenience, and the comparably small number of storms noted about its summit by inhabitants of this section has a practical signifi- cance to the observer. The relative humidity, as shown by the comparison of differences of wet and dry bulb, is less than at peaks ordinarily of elevations of ten thou- send feet. The consequent variety and brilliance of the atmosphere lend : : , : wi 7, tw bi Ah lauds @ a Ne i kee ge ~ PRR tte. 8! - iW Li sth ck mae a a + ~¢ = . Fi ~ 4 tf : ' 7 af Ks , < iia as Selo bose ree a 6a eee ee aie < a ty : _ * : “i : b ho ite i ‘ » ey ie ¢ I ee : ohh hig Oo ine Aish Sa MISSA Be yi, ma. 5 re? he a eee he 5 ie : : by AN 99 odoin ous ‘Qed ‘“U0Ss Ou 4) ‘uoMjou bingwaauod dof YuMuasoyy Y ‘advos2)2. P ‘adoosapay, burauosqg = 6 taubpasydrrgy 2 ‘UtAUDT =~ GUuIAL WStMLL YQ ‘USI 9 “AI DUD) DP Y 'OZIS TOANJDU PAIY7-IUC) NORE GOs 1y NOSdided= 42 \esay Buruswys}9q 4O} SA LWYVddV CoN HLV Te AWONOYLSY-Il IODA ON THE DETERMINATION OF PERSONAL EQUATIONS. A knowledge of the personal equation of observers is of the first im- portance when observations for longitude are to be made. The method of determining this equation before and after a complete set of observations for longitude is unsatisfactory, since it is well established that the personal equation may change even in one night. This fact induced efforts to deter- mine the equation after every observation taken, but all the instruments so far invented for the purpose, several of which I have employed, have proven almost a failure on account of difficulty in adjustment, or have been found objectionable in other respects. A continuous study of this subject has brought into existence a machine which is recommended for use in all future determinations of longitude from this office, and it is to be regretted that its availability comes so late. The determinations of longitude considered in this report require correction for personal equation, but after reducing the observations for this purpose I find the result of little value. Each observer was always desirous of finish- ing a station and proceeding to the next as soon as possible, to avoid the probabilities of bad weather. The distance between the stations, and the delay and expense attending a journey to the sending-station, explains why observations for personal equation were not made after each determination of longitude. I recommend, therefore, that no personal equation be applied to any of the observations, and that after the circle is closed, which will be done when Santa Fé is connected with San Diego, an investigation be made to obtain the most probable result for each determination. The annexed table gives the observations taken by the different observ- ers for determination of personal equation. It will be seen that John H. 475 476 ASTRONOMY. ; Clark and E. P. Austin used different instruments in the same meridian. In other cases, both observers used the same transit and observed alternate stars. The method of reduction of Professor Safford and J. H. Clark’s observations can be found in the report on the determination of longitude between Salt Lake City and Santa Fé, page 11. SALT LAKE CITY, SEPTEMBER 13, 1872. = Name of star. oT Aa. Bb. Ce. uve AR. AT. a Jils Gita SE 8. 8. 3. lis tits 2 hem. 38: lis ie 6B Ben | hac ephersssseeees 20 15 49.80 |— 0.19 |— 0.04 |+ 0.21 |20 15 49.78 |20 13 11.80 |— 0 02 37.98 KE. | ¢ Delphini .-.---.- 28 46.26 |+ 0.04 0.00 |+ 0.05 28 46.35 26 07.84 38.51 Bea Cyoniees- === 38 44.14 |— 0.01 |+ 0.03 |+ 0.07 38 44,23 36 06.06 38.17 BK. | » Cygni...--.---- 54 04.14 0.00 |+ 0.05 |+ 0.06 54 04.25 51 26.12 38. 13 W. | ¢ Cygni-..--.---..|21 09 09.54 |4 0.01 |— 0.063 |— 0.05 [21 09 09.47 |21 06 31.45 38. 02 W.a|iel (Perasivan ne. -- 17 50.40 |+ 0.03 |— 0.03 |— 0.05 17750535 15 12.17 38. 18 W.| @ Cephei .----.---/21 28 41.30 |— 0.10 |— 0.10 |— 0.14 }21 28 40.96 /21 26 02.91 |— 0 02 38.05 E. | « Cephei---.----- 20 15 03. 86 7.01 |— 0.15 |— 6.97 [20 15 49.73 }20 13 11.80 |— 0 02 37.93 E. | « Delphini -.----- 238 46.20 J+ 1.32 |— 0.04 |— 1.55 28 45.93 26 07.84 38. 09 KE. | a Cygni-...---.---| 38 46.52 0.26 |— 0.06 |— 2.15 38 44.05 36 06.06 37.99 E. | » Cygni...---.--.| 54 06.7 0.00 |— 0.05 |— 2. 01 54 04.70 51 26.12 38.58 W.| ¢ Cygni-.--------|21 09 06.74 |+ 0.57 |4 0.15 |4 1.75 |21 09 09.21 |21 06 31.45 37.76 Wel Besasites=s----- 17 47.26 |+ 1.01 |4+ 0.20 |+ 1.62 17 50.09 15 12.17 37. 92 W.| @ Cephei .----.--- 21 28 39.80 |— 3.69 I4 0.59 |4 4.45 121 28 41.15 [21 26 02.91 |— 0 02 38.24 Correction by E. P. Austin...........- wets A come She tee cee oO Se aaie eee oeeraeee — 0 02 38.149 Correction by;Johngl Clank eo sseeeisae eas eae eae eee eee — 0 02 38.073 NORMAL EQUATIONS OF AUSTIN’S OBSERVATIONS. 0 =+ 0.41 + .7.00 dt —3.13a+ 3.19¢ dt = — 08.049 0=— 0.46 — 3.13 dt +9.91a— 8.52 a=+ 08.071 0 =— 0.95 + 3.19 dt — 8.52 a + 36.62 ¢ c= +.08.047 NORMAL EQUATIONS OF CLARK’S OBSERVATIONS. 0=-+ 1.000 + 7.00 dt —3.18 a+ 3.19 ct ot = + 08.127 0 =— 5.535 — 3.13 dt + 9.91 a!— 8.52! a = + 05.578 0 =-+ 5.391 + 3.19 dt — 8.52 a! + 36.62 c! cl — — 08.024 Adopted azimuth =-+ 2.00 Therefore a= + 2.578 Adopted error of collim, =— 1.50 e=— 18.524 PERSONAL EQUATIONS. SALT LAKE CITY, SEPTEMBER 16, 1872. 477 a =| Name of star. it Aa. Bb. Ce. iW, AR. AT. a hm. 8. 8. 8. 8.) | him. 8. h.m. 8. hem. 8. W.| 6 Draconis .----. 19 14 15.20 |+ 0.12 |— 0.37 |+ 0.10 {19 14 15.05 |19 11 32.34 |— 0 02 42.71 Waly) Aquilae: 2--—-- 41 55.04 | — 0.05 |— 0.12 |4 0.04 41 54.91 39 12.24 42. 67 Wis}ea) Aquilae. aaeme 46 16.80 |— 0.06 |— 0.10 |4 0.04 46 16. 68 43 34. 10 42. 58 W.| e Draconis ..---. 50 19.92 |-+ 0.14 |— 0.25 |+ 0.11 50 19.92 47 37.32 42. 60 HE. | « Cephei --.-_-.. 20 14 54.20 | 0.28 |— 0.11 |— 0.17 /20\ 14 54.20 |20 12 11.54 42. 66 E..| ¢ Delphini -..-.- 23 50.66 |— 0.05 0.00 |— 0.04 28 50. 57 26 07.81 42.76 E. | @ Cygni. ...--.-. 38 48.66 + 0.01 |+ 0.04 |— 0.05 38 48. 66 36 06, OL 42. 65 BY ve Cy eniase see a= 54 08.50 0.00 |+ 0.04 |— 0.05 54 08. 49 51 26.08 42.41 Be GL, Cyenita ss 2-)-2- 21 02 54.69 |\— 0.01 |4 0.05 |— 0.05 }21 02 54.68 |21 00 11.92 |— 0 02 42.76 Bie ||) yee Aha saree eo 19 41 53.72 |4 2.74 0.00 |— 1.79 |19 41 54.67 |19 39 12.24 |— 0 02 42.43 BE. | a Aquile........ 46 15.38 |-4+ 2.85 0.00 |— 1.77 46 16. 46 43 34.10 42. 36 E. | e Draconis ..---. 50 32.48 |— 7.49 0.00 |— 5.12 50 19, 87 47 37.32 42. 55 W.|« Cephei ......-- 20 14 59.76 |\—14.29 | 0.55 |4 7.98 |20 14 54.00 )20 12 11.54 42, 46 W.j|e Delphini ....-. 28 45. 82 |-+ 2.69 |+ 0.20 |4+ 1.79 28 50.50 26 07.81 42. 69 We Kom C yoni: sce. 38 45.98 |— 0.53 |+ 0.41 |+ 2.48 38 48, 34 36 06. 01 42. 33 Wile Cyenil=-ce- =.=. 54 06.14 0.00 |+ 0.33 |4+ 2.31 54 08.78 51 26.08 42.70 WralieleCygni.- 5. ---.. 21 02 51.51 |-+ 0.32 + 0.27 |4 2.22 [21 02 54.32 121 00 11.92 |— 0 02 42.40 Correctioni by Hive) Austin ssc) .ajecekre sc oes ceince eo cee ises Geese ecenees/ceee — 0 02 42.644 Correctloniby Johns Clarktss = smecser eee c ete se ose oe ceee cesses ees — 0 02 42.490 NORMAL EQUATIONS OF AUSTIN’S OBSERVATIONS. 0=-+ 0.990 + 9.000 dt — 3.770a-+ 2.010¢ 0= + 0.416 — 3.770 dt + 11.565a— 5.7506 O=+ 1384+ 2.010 dt — 5.750 a + 44.484 & dt = — 08,144 a=— 02.102 c=— 03,038 NORMAL EQUATIONS OF CLARK’S OBSERVATIONS. 0 = + 1.860 + 8.000 db«— 2.600 a'— 4.620 ¢! 0 =— 1.316 — 2.600 dt + 10.196 a! + 8.804 c! 0 = + 5.768 — 4.620 dt 8.804 a! + 37.672 Adopted azimuth + 58.00 Adopted error of collim. — 18.50 dt —— 03.290 a = + 08.273 cl = — 08.253 Therefore a = + 58.273 e=— 18.753 478 ASTRONOMY. SALT LAKE CITY, SEPTEMBER 17, 1872. | Name of star. Th Aa. Bb. Oc. mus AR. (Se S hm. 8. 8. Be 5 \|lln Gs lis Gl Gh han. (8: ID || (2 JEN MES Sasen oss 18 47 06.70 |— 0.01 0.00 |— 0.04 |18 47 06.65 |18 44 22.54 |— 0 02 44.11 E. | 50 Draconis .----- 53 14.42 |+ 0.12 0.00 |— 0.13 53 14. 41 50 30. 05 44.36 E. | Agquile.-..-. -- 19 01 17.40 |\— 0.02 |— 0.01 |— 0.04 }19 01 17.33 58 33.12 44.21 E. | 6 Draconis ..---. 14 16.06 |+ 0.06 |— 0.04 |— 0.09 14 15.99 |19 11 32.28 43.71 KE. | 6 Aquile.-.--.-- 20 48.62 |— 0.03 |— 0.03 |— 0.04 20 48.52 18 04.41 44.11 E. | y Aquile...-.. -- 41 56.42 |— 0.03 |— 0.04 |— 0.03 41 56. 32 39 12.23 44.09 W.|e Draconis ...--- 50 21.35 |+ 0.08 |— 0.07 |+ 0.10 50 21.46 AT 37.25 44,21 Vivo || @ AGW oe noses 59 39.08 |— 0.03 |\— 0.02 |4+ 0.03 59 39. 06 56 55. 09 43, 97 W.| « Cephei .----.-- 20 14 55.22 |4+ 0.15 |— 0.04 |4 0.15 )20 14 55.48 [20 12 11.44 44,04 W.| « Delphini ....-- 20 28 52.06 |— 0.03 0.00 |-+ 0.04 |20 28 52.07 |20 26 07.80 |— 0 02 44.27 W.| 6 Draconis .--.-.. 19 14 17.44 |— 5.46 |— 0.05 |+ 4.33 /19 14 16.26 /19 11 32.28 |— 0 02 43.98 W.| y Aquile.-..---- 41 51.98 |+ 2.43 |— 0.01 |4 1.69 41 56.09 39 12.23 43. 86 W.| a Aquile-..---..- 46 13.52 |4+ 2.52 0.00 |+ 1.67 46 17.71 43 34.09 43. 62 By. | x Cephei .----. -- 20 15 15.64 |—12.65 |— 0.18 |— 7.54 |20 14 55.27 [20 12 11.44 43. 83 E. |} e« Delphini ..--.. 20 28 51.26 |4+ 2.38 |— 0.04 |— 1.69 [20 28 51.91 [20 26 07.80 |— 0 02 44.11 Correction by ihr. A US GLn eee ee alae a ee ee — 0 02 44,078 Correction by John H. Clark..-.. ..---.. ..---. ---------. ------ ------ ---------- — 0 02 43. 880 NORMAL EQUATIONS OF AUSTIN’S OBSERVATIONS. 0=— 1.130 + 10.000 dt— 4.690a-+ 1.300 dt = + 0,092 O=+1.540— 4.690 dt + 17.129a-+ 5.430 a—— 05.054 O—+2181-+ 1.300dt4- 5.430a+58.108 ¢ o—=— 08.035 NORMAL EQUATIONS OF CLARK’S OBSERVATIONS. 0 = + 0.860 + 5.000 dt —2.310 a! + 0.930 c! dt = + 08.120 = — 5.193 — 2.310 t+ 9.535 a1 — 9.831 c! ai’ —-+ 03.668 0 = + 3.648 ++ 0.930 dt — 9.831 a + 30.615 c! c= + 03.092 Adopted azimuth = - 45.00 Adopted error of collim. =— 1%.750 Therefore a= - 45.668 c= — 15,658 PERSONAL EQUATIONS. 479 SALT LAKE CITY, JULY 2, 1873. a eI Name of star. Te Aa. Bb. Ce. ee AR. AT. a hs Mm. <8 8. 8. ee Ram £8: he Ms 8: hama, a EK. | z Herculis ,...-.. 9 34 17.16 |— 0.49 |— 0.14 |+ 0.18 | 9 34 16.61 |17 41 31.39 |+ 8 07 14.78 E. | 72 Ophiuchi. 54 08.04 — 1.04 |— 0.10 |+ 0.16 54 07.06 |18 01 21.79 14.73 E. | 7 Serpentis ..-../10 07 33.06 — 1.35 |— 0.08 |-+ 0.16 |10 07 31.79 14 46.35 14.56 Wilma Liye se ee 25 26.18 |\— 0.10 |— 0.20 |— 0,21 25 25, 67 32 40.52 14, 85 W.| 50 Draconis......} 43 14.17 |+ 4.36 |— 0.26 |— 0.64 43 17.63 50 31.99 14, 36 W.|d@ Sagittarii -.--.. 11 02 02.03 — 1.80 |— 0,03 |— 0.17 111 02 00.03 [19 09 14.51 |+ 8 07 14.48 Correction by.Je bs Clarice enemys onicensesee) ace=s at cebilec sateen ewsieeceee + 8 07 14.626 I. | y Draconis....-.| 9 46 26.81 |+ 0.59 |— 0.21 |+ 0.26 | 9 46 27.45 |17 53 42.07 |+ 8 07 14.62 E. | « Sagittarii ..--. 58 59.71 |— 1.86 |— 0.06 |4+ 0.17 58 57.96 |18 06 12.43 11.47 Ii. | 1 Aquilw ..--... 10 21 06.73 |— 1.49 |— 0,08 |+ 0.16 |10 21 05,32 28 19.88 14.56 W.| 8 Lyrw.......-.| 38 11.54 |— 0.31 |— 0.14 |— 0.19 38 10.90 45 25.58 14.68 Wali Aquilza]--2-.- 52 22.68 |— 0.82 |— 0.05 |— 0.17 52 21.54 59 36.34 14. 80 W.|7 Draconis...... 11 10 45.17 |+ 3.60 |— 0.15 I— 0.56 (11 10 48,06 119 18 02.87 |+ 8 07 14.81 Correction by aw) Wi. Marny attic scene eee cece ce see oe eee one ceaden sees + 8 07 14. 657 NOEMAL EQUATIONS. O=+ 6.96-+ 12.00 dt+ 041a— 5.11c+ 6.002 ot = — 08.373 O—+ 20.65-+ 0.41 dt + 11.83 a + 16.25 c + 0.20 x a=— 12.956 O=+ 22.33 — 5.11 St + 16.25 a + 40.68 c—1.98 2 c= -+ 05.162 0=+ 278+ 6.00dt+ 0.20a— 1.98c¢4 6.00% x= -+ 0.031 SALT LAKE CITY, JULY 3, 1873. = “ 2 | Name of star. ne Aa. Bb. Ce. a AR. AT. S h. m._ 8. 8. 8. 8. hh. me <8: hem:, | a: Asm. 18: E. | ¢ Ophiuchi.-...- 8 22 59.89 |— 1.38 |— 0.08 |4 0.13 | 8 22 58.56 /16 30 11.98 |4+ 8 07 13.42 E. | « Ophiuchi-----. 44 28.83 |— 0.92 |— 0.10 |+ 0.13 44 27.94 51 41,34 13.40 E. | a, Herculis .---- 9 01 40.71 |— 0.80 |— 0.06 |+ 0.13 | 9 01 39.98 |17 08 53. 40 13. 42 E. Gr. 966. S.P 15 35.58 |— 6.05 |+ 0.05 |— 0.52 15 29. 06 22 42.56 13. 50 Ww. ae il 15 34.48 |— 6.06 |+ 0.05 |+ 0.52 15 28.99 22 42.56 13. 57 W.| o Draconis ...--. 30 29.90 |-+ 2.27 0.00 |— 0.37 30 31.20 37 45, 42 13. 62 W.| 72 Ophiuchi..-.-- 54 09.34 |— 0.92 |-+ 0.04 |— 0.14 54 08.32 /18 01 21.80 13. 48 W.|7 Serpentis ...--. 10 07 34.25 |— 1.20 I+ 0.06 |— 0.14 |10 07 32.97 118 14 46.36 |+ 8 07 13.39 (Cominco a BECO Tes combo sadses 2S SSH0 POUCH OSCE MSS HeRCSOSoe Eea Gece + 8 07 13.475 E. | 7 Herculis ...... 8 31 21,11 |— 0.07 |— 0.16 |+ 0,17 | 8 31 21.05 |16 38 34.66 |+ 8 07 13.61 Bad) Herenlish=s--. 49 43.94 |— 0.26 |— 0.10 |+ 0.16 49 43.74 56 56. 97 13. 23 E. |v Serpentis --.-. 9 06 31.23 |— 1.43 |+ 0.03 |+ 0,14 | 9 06 29.97 |17 13 43.21 13. 24 W.| @ Ophiuchi..-.... 21 51.92 |— 0.79 0.09 |— 0.14 21 50.99 29 04.33 13.39 W.| y Draconis ...... 46 28,21 |+ 0.52 |+ 0.03 |— 0.22 46 28.54 53 41.70 13. 16 W.| m Sagittarii.....| 9 5 C0.88 | 1.66 |4+ 0.03 |— 0.14 | 9 58 59,11 |18 06 12.43 |4+ 8 07 13.32 Gorrection bys We Wea Marry attic. ae ieceeee a ioeee oan cee ae see tee + 8 07 13.325 NORMAL EQUATIONS. 0 =-+ 13.25 + 14.00 dt + 10.75a— 1.92¢c+ 6.00% ot = + 08.475 0 = + 46.13 + 10.75 dt + 29.5la+ 4.25¢-- 2.112 a —=— 15.745 O=+ 1.384— 1926+ 4.25a+51.42c—0.192 c= -+ 03.135 O=+ 147+ 6.00dt+ 2lla— 019¢+ 6.002 x—=— 08.150 480 ASTRONOMY. : SALT LAKE CITY, JULY 4, 1873 EI Name of star. 1p Aa. Bb. Ce. mes AR. NIE 5 hm 8. Bs 3. 38. ete 1S; aie Gs hem. 8. W.| 8 Urs Minoris-..| 6 43 53.74 |+ 3.62 |+ 0.50 |\— 0.33 | 6 43 57.53 |14 51 09.37 |+ 8 07 11.84 Wi.)|G Ghibrases- ane 7 03 01.55 |— 1.32 |+ 0.10 |— 0.09 | 7 03 00.24 |15 10 12.07 11.63 Wal (es Mhibrsseee a= 16 22.04 |— 1.49 |4+ 0.12 |— 0.09 16 20.58 23 32.36 11.78 W.| a Serpentis ----- 30 51.38 |— 0.96 |+ 0.27 |— 0.09 30 50. 60 38 02.48 11.88 E. | @: Scorpii---..--- 50 54.54 |— 1.58 |+ 0.19 |4+ 0.09 50 53. 24 58 05.15 11.91 E. | + Herculis ...--. 8 08 44.90 |+ 0.26 |4+ 0.54 |+ 0.13 | 8 08 45.83 |16 15 57.48 11. 65 E. | 7 Draconis-.-.-.-- 8 15 05.24 I+ 1.30 \|+ 0.73 [4+ 0.19 ! 8 15 07.46 116 22 19.37 |+ 8 07 11.91 Correctionsby,J bla © lanks aee eee eee eee eee ate eee + 8 07 11.828 Wee Booting nea 6 49 53.50 0.00 |+ 0.21 |— 0.12 | 6 49 59.59 |14 57 11.48 |4+ 8 07 11.89 W..| o? Libra-........| 7 08 48.10 |— 1.46 |+ 0.10 |— 0.09 | 7 08 56.65 |15 16 58.50 11.85 W.| a Coron -.----- 22 08.65 |— 0.46 |+ 0.28 |— 0.10 22 08.37 29 20. 40 12. 03 W.| « Serpentis..--.. 37 19.66 |— 1.01 |4+ 0.31 |— 0.09 37 18. 87 44 30.93 12. 06 E. Groombr. 2320-| 58 46.98 |+ 2.13 |+ 0.87 |+ 0.24 58 50.22 |16 06 02. 07 11. 85 E. | A Draconis .----. 8 21 02.47 |+ 2.26 |+ 0.93 |+ 0.25 | 8 21 05.91 28 17.95 12. 04 E. | 7 Herculis ---. -- 8 31 22.01 |— 0.07 |+ 0.49 |4 0.11 | 8 31 22.54 [16 38 34.65 |4 8 07 12.11 Correetion by, Wa We Marry ates -- 22s oe oe ele eee ee nee eee pon Orel one NORMAL EQUATIONS. 0O=+ 015+ 14.00 dt— O.7la+ 011¢+7.002 ot = — 08.172 0=-+ 20.88 — 0.71 dt+11.98a— 3.83ce—0.81z2 a=— 18.715 0=—11.14+4+ O.11dt— 3.8844 46.94e4231 4 c= + 08.089 0O=— 142+ 7.00dt— 0.8la+ 231e+7.002 x= -+ 05.148 SALT LAKE CITY, SEPTEMBER 235, 1873. = 3) Name of star. Tr Aa. Bb. Ce. ae AR. (NAb S hom. 3. 8. as 8. es. Reem ess hm 3. Wi.) 0G. eAquilssss 22-22" 10 52 40.10 |— 0.73 |+ 0.11 |— 0.06 |10 52 39. 42 |18 59 35.85 |4+ 8 06 56.43 W.| 6 Draconis .----- 11 05 33.07 |-+ 2.05 |+ 0.28 |— 0.14 |11 05 35.26 |19 12 31.73 56. 47 W.| @ Vulpecule ...-}| 16 30.55 |— 0.54 {+ 0.13 |— 0.06 16 30.08 23 26.89 56. 81 We|x Aquilsesss=-- 23 10.25 |— 1.32 |4+ 0.08 |— 0.06 23 08.95 30 05. 46 56. 51 W..|'y. Aquilmee2. 2-=- 33 19.40 |— 0.91 |+ 0.14 |— 0.05 33 18.58 40 15.10 56. 52 Bie) (8 Aquilee=s= = 42 10.51 |— 0.95 |+ 0.14 |4 0.05 42 09.75 49 06. 37 56. 62 E.|@ Aquile..-...--| 57 51.53 |— 1.17 |4 0.14 |4 0.06 57 50.56 |20 04 47.11 56. 55 E. Groombr. 3241-|12 23 33.79 |-+ 2.99 |4+ 0.55 |+ 0.18 /12 23 37.51 30 33. 64 56. 13 Bea Cygniee = 12 30 10.63 |+ 0.16 |+ 0.28 |+ 0.09 |12 30 11.16 |20 37 07.88 |+ 8 06 56.72 Wis| e eAquils--.----- 10 46 57.09 |— 0.79 |+ 0.11 |— 0.06 |10 46 56.35 |18 53 53.03 |+ 8 06 56.68 W.|7 Draconis ...... 11 10 58.95 |+ 3.22 |+ 0.35 |— 0.19 /11 10 02.33 /19 16 59.08 56.75 W.|u Aquilw...--.-- 20 59.25 |\— 0.98 |+ 0.10 |— 0.05 20 58. 32 27 54.74 56. 42 Walt@ei@yoniesssese= 26 06.01 |+ 0.44 |4+ 0.18 |— 0.09 26 06.54 33 03.35 56. 8L E.} a Aquil@.--..--- 37 41.08 |— 0.94 |+ 0.14 |+ 0.05 37 40.33 44 37.06 56.73 B..|| q eAgquileess see. 51 02.13 |— 0.98 |+ 0.14 |+ 0.06 51 01.35 57 58.08 56. 7¢ BE. | « Cephei -----.-- 12 06 05.62 |-+ 4.76 |+ 0.69 |4+ 0.25 |12 06 11.32 |20 13 08.25 £6. 93 Bes) 'o; Cygni-=----.-- 12 16 13.44 |+ 0.39 |+ 0.30 |+ 0.08 112 16 14.21 [20 23 10.97 |4+- 8 06 56.76 Conrection bys dah) Glan Ke eee oe eee ee eee + 8 06 56.529 Correction by Dr. F. Kampf -----. ----- = 2 on ono es ene nee + 8 06 56.726 NORMAL EQUATIONS. 0—— 15.23 +17.00dt— 263a+ 0.96c+ 8.002 dt = -+ 08.529 0=+34.35— 2.63dt+1820a— 9.46c—2.922 a=— 15.750 0—— 21.024 9.96 dt— 9.46a+4 67.3204 1.052 c= 02.056 0—— 10.984 8.005t— 2.92a+ 1.05¢+8.002r = 08.197 PERSONAL EQUATIONS. 481 SALT LAKE CITY, SEPTEMBER 26, 1873. ry & Name of star. Te Aa. Bb. Ce. 7 AR. AT. s) hem. 8 &% 8, 8. hem. 8. hm. 8. hem. 8. HE. |e Aquile ......./10 16 57.64 |— 0.86 |+ 0.09 |+ 0.14 |10 16 57.01 |18 23 53.01 + 8 06 56.00 EK. | t Draconis..._-- 11 10 58.60 |+ 3.51 |+ 0.18 |-+ 0.48 /11 10 02.77 [19 16 59,01 56. 24 E. | #2 Aquilw = ..222) 20 59,65 |— 1.07 |+ 0.03 |+ 0.14 20 £8.75 27 54.73 55. 95 Be |tGeiCyrnipees eee 26 06.31 |+ 0.48 |+ 0.03 |4+ 0.21 26 07.03 33 03.33 56. 30 W.| @ Agquile ...... 37 42.20 | 1.03 |+ 0.11 |— 0.13 37 41.15 44 37.05 55. 90 Writ Aquilsescesene 51 03.18 |-F 1.06 |+- 0.12 |— 0.14 51 02.10 57 58. 06 55. 96 W.| « Cephei........ 12 06 06.91 |+ 5.18 |+ 0.55 |— 0.63 |12 06 12.01 20 13 08.18 56. 15 Wir hanGyonipensesece 12.16 14.72 |+ 0.42 |+ 0.24 |— 0.21 |12 16 15.17 20 23 10.94 |4+ 8 06 55.77 OF — 0,90 |+ 0.09 |+ 0.14 |10 52 39, 67 (18 59 35.84 |+ 8 06 56.17 E. | 06 + 2.23 J+ 0.10 |-+ 0.36 |11 05 35.24 |19 12 31.67 56. 43 E. | a — 0.59 |4+ 0.06 + 0.15 16 30.74 23 26. 87 56. 13 E. | « — 1.43 |4+ 0.03 + 0.14 23 09.51 30 05. 44 55. 93 E. | y — 0.99 |+ 0.02 + 0.14 33 18.98 40 15.09 56.11 w.| B — 1.03 |+ 0.11 |— 0.13 42 10.50 49 06.35 55. 85 We) |G) 5 Aquila) sees see 57 52.48 |— 1.28 |-+ 0.10 — 0.14 57 51.16 20 04 47.10 55. 94 W.| x Capricorni -.../12 13 11.29 |— 1.73 |+ 0.08 |— 0.15 /12 13 09, 49 20 05.41 55. 92 Ww. Toombr. 3241 |12 23 34.76 [4+ 3.26 |+ 0.44 — 0.45 |12 23 38.01 20 30 33.57 + 8 06 55.56 Correction bysJ- Ha Clark o-ess ces seen ee -|+ 8 66 56. 038 Correction by Dr. F. Kampf.........-... + 8 06 56.004 NORMAL EQUATIONS. O=— 3.374 17.00 dt— 1.63a+ 1.49¢+9.00% 6t—= ++ 03.038 O=+ 35.87 — 1.63 dt-+19.02a— 3.470419 a—=— 15.906 O=+ 251+ 1496t— 3470-4 66.45c4.0.440 c= -+ 08.138 O=+ 236+ 9.00d¢+ 129a+ 0440+9.00x 2 —— 03.034 JANUARY 11, 1874.—PERSONAL EQUATION BETWEEN J. H. CLARK AND T. H. SAFFORD. Te a. a--1T. (6 Wis & ip Gh 8. 8. 8. By 8. 8. Groombr. 848 ......-- 4 31 00.50 31 48,58 |4+ 7.95 |4+ 0.11] 56.64] 56.14 3.92 | — 4.05 je Bridanicss-ece see ce 4 38 23.18 39 09.54 |-+ 3.00 0.00 | 12.54] 49.36 |— 0.06 | — 1.00 Groombr. 966 ..--.... 5 22 10.96 22 47.74 |+ 7.96 |4+ 0.25] 55.95] 44.99 3.71 3.84 GPauniseesneteorsteeee|) 5 eOI20N62 30 03.77 + 3.58 |+ 0.03 7.38 | 46.76 |+ 0.39 1,07 6.78 = 3.98 n — 3.05 ¢ — 177= 3.32 n-+2.17¢ L70— n—0.77 ¢ — 0.53=> n-+ 0.83 ¢ 49.46 = dt —m — 1.05 ¢ : 46.97 = dt-+ m+ 0.75¢ Hence —2.49 =1.80c¢ n= -+ 0.63 (— 1.38) = e e=— 1,39 0.143 n —223 =1.60c — 1.39! — ce 31 AST 48? ASTRONOMY. Decl. Janet, a. Oz hom. 8. 8. ies s. 8. 8. : 6 Tuuri-....-..| 17 18] 0.311) 0.020/4 15 36. 78/-+-3. 46'+-0. 01) 40. 25)/+-0. 20)4-1. ts oe.” sDaurieceascee 18 54] 0.342) 0.024] 21 12.26) 3.50)\+0.01) 15.77/-+-0. 22/41. 6 ah Pautices sees 16 12] 0.292} 0.018) 28 38.22} 3.44/+0.01) 41. 67'+-0. 19/+-1. Be Groombr. 848] 75 42] 3.924] 0.607) 31 48. 58/+-7.95)+0. 15) 56. 68|+2 47|-+-5. 64) 8.61]..--.-- (48. 07) y Wauriescsoee- 22 4:| 0.418) 0.035) 34 37.59)+3.59/+-0. 01) 41.190. 26)+1.5!] 39.37] 47.82)... --. pw Bridani------ —3 29) C061) 0.001) 39 09.54) 3.00) 0.00) 12.54;—0. 04)-F1. Bel PAGS soe soa) atk (iit z4 Orionis .----- +5 22] 0.094) 0.002) 44 26.84) 3.19) 0.00) 30. 03'+0. 0€)4+1.4() 42.28) 47.75)....--- TPP OLONIS eee 2 14! 0.039] 0.000] 47 38.50] 3.12) 0.00} 41. G2)+-0. 02]4-1. 3°] 0.79]......-]..----. 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Meridian Marke \ SKETCH OF Fr. FRED STEELE WYOMING Showing poston of Observing Block Longitude 100 50 48°80 3 U0) [ Tatitnde 41" 46 40°24 + 0.00 Allitnde above sea 68400ft- Oveupied in 1872. B0userving Block 4 Longitude 10 Tutitude af 18 Altitude above Ocenpied in 1875- SKETCH OF GREEN RIVER WYOMING Showing position of” | Observing Block and Meridian Mark Scule in Feet ne | } Surveyed in Wr. | ee and | 4 Meridiun Mark 2. Meridian Mark Scale in Feit et ee: = | Longitude 17" 43° “5416 + 0.40 I Latitude 40" 98) 19/97 + 0.17 yl Altitude ubove seu 1358.0 -£ Ocenpied in 187%, Longitude 10s 28) 0.57 + 0.40 Latitude = 41 a 3812 = O10 2 Altitude above soa Gone tt. Meridian Mark Spero Nesey Astronomical Monument a ie poe yo xo SKETCH OF CARLIN NEVADA Showing postion at and Meridiun Marks SculeinFeet Surveyed in 1874, ENXPRNIVIONS oF 1871187218 or the Command of The Graphical N.Y BY ORDER OF THE HONORABLE THE SECRETARY OF WAR, UNDER THe DIRECTION OF BRIG GEN. A.A HUMPHREYs , CHIEF OF ENGINEERS, US ARMY, Longite 104 48 98.80 taunts a8 38 Soo AlUtale above sea 50216 ft led in ITS. SKETCH OF PIOCHE Longitude NEVADA LITT Latitude Showing postion of Uubide above sea 6339 OFF Astronomical Monument Occupied in 1873. and Mevidian Marks Scalein Feat oes, PD ‘ r Surveyadin 1872. { Yorth Nuork ] - SKETCH OF ; iy) HUGHES COLORADO | SKETCH OF Showing position of | | We | VIRGINIA CITY Astronomtcal Monument ~ sae / NEVADA Meridian Mark Showing position of Scale in Feet eee Suieveyed in 1873. “|S Astronomical Monument le In Feet Surveyed in 1873. South Mack Longiude 104" 49° 1510 Laue a4 40 41.07 Aliitude above wea 6000.7 11 Occupied in 1873 Longitude Luurade Mutude nbove a Occupied In Merihan™ Monument —_—_—_~ 225 x 1 | ! } ] SKETCH OF A AB RAN J SKETCH OF | COLORADO is TRINIDAD COLORADO Showing position of COLORADO Showing position of Agronomical | Monument ; Showing postion of Astronomical Monument f | Afontalae Mark A ; Aatronomical Monument Sento in Foot Scale in Foot t Oeeupled fn 1078. Scule in Feut : Ope ee —— Surveyed in 1876, Surveyed in 1873. BXPRDTONS oF NTS ITS, 174, 1075 8 7G Under the Command of : = 7 TeGarbece ; Tat [Lieut Geo. M.Wheolor. Corps of Endineern U8, Army. BY ORDER OF THE HONORABLE THE SECRETARY OF WAR, UNDER TH2 DIRECTION OF BRIG GEN.A A HUMPHREYS. CHIBP OF ENGINEERS US ARMY us 38) 8.80 36 16 «6528 oa S015 EO ft ed in 1872. SKETCH OF IB} 10; AN NY 10) 1K (Uf NAN Vet Showing poxttion of Astronomical Monument Seu oe Surveyed in 1872. Langitnde 10%" 0 Latitude WU OT 46.62 \& Altitude sbave sea 60410 ft SKETCH OF CHEYENNE WYOMING Showing position of Astronomical Monument Scale in Feet en mae =) Surveyed in 1873. Longitude 105 00 SES Latitude = SS OY SV RH Altitude above sea 644117 Ocenpied in ISTS. Ordnanes Monument Reserve SKETCH OF FORT UNION NEW MEXICO Showing position af Astronomical Monument Scale in Feet a BS 1n74 Longitude 105° ‘1 2760 Latiiude ao” 42 36.36 Aldtude above wou AGN78 fT Occupied in 1873, Momonent Iie sy WI Petree ae SKETOHW OF GEORGETOWN COLORADO Showing position of Astronomical Monument unt Moridian Mark Seale in Foot Blixabeth — eeeie Surveyed in 1873. Ty SKETCH OF ST. GEORGE UTAH Showing position of Astronomical Monument Scale in Feet IIL Surveyed in 1872. 4JOSGEBEO Longitude 113. 38, O40 Latitude = 47" 08-2038 Altitude above sea 261L0 ft Ocenpied in 1571. Longitude 108) 50 4oaw Karine ce Mee Oe Alte above gem MV69 fr Occupied tm 1873. MILITARY RESERVATION (SANTA FE) NEW MEXICO Showing podtion ob Astronomical Monunient Seale tn Peet IN735. PLATE NOG Covege 1D Chuke Del Ist L.leut Geo. M. Wheeler, Corps of. Endineers, US. Army: EN. AA HUMPHREYS. CHIEP OF ENGINEERS, US ARMY GEOGRAPHICAL POSITIONS. 491 Geographical positions by measurement from or by trigonometrical connection with main astronomical points. Year. 1873 1374 1877 WIT 1873 1873 1873 1873 1 Fort Garland, Colo... Station. Camp Douglas, Utah (new flag-staff). Camp Donglas, Utah (ast’ onomical monu- ment). Fort Ellis, Mont .-... Fort Fred. Steele, Wyo. (flag-staff). Fort Sanders, Wyo. (flag-staff). Atlas-| Connected with sheet | astronomical sta- No. tion at— 62 | Main triangula- tion. 41 | Old flaz-staff and sun-dial. 41 | Salt Lake City, Utah. 24 | Bozeman, Mont 43 | Fort Fred. Steele, Wyo. 43 | Laramie, Wyo... Longitude. oOo 4 “ 105 25 33.73 lil 50 14.22 111 50 14. 07 110 59 49. 27 106 56 54.27 105 34 59, 56 0 Alti- | Connection Latitude. tude.| made by— Remarks. Oper aie Feet. 37 25 27. 33/4, 853. 7 7, 937,0 | R. R. level. 40 45 47. 504,902. 5) Dr. F. Kampf | By triconometric con. nection with sun-dial and stone ¢bserving pier, established by survey. 40 45 47. 53/4, 905.0) G. Thompson.| By chaining; stono monument in same position as old flag- staff. 45 40 08. 00/4, 878. 0).....-......-.. Approximate differ- ence between astro- nomical _ observing pier and fort, takep trom _Land-Offieo 41 46 50. 63)6, 850. 0) J. E. Weyss-.- 41 17 26. 89/7, 168, 0) J. E. Weyss -. | plats, and the position of the observing pier as given by J. I. Clark. Difference between monument and flag- staffdetermined from plats and measure- ments by J. E. Weyss. eee ats 4 e : A ZAGITOY LADINGAADOS ° les eh en e =a - gh cet fee 4 (— of 4 Oe) ——<-— U. 8S. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN, Ist Lizut. GEO. M. WHEELER, Corps or ENGINEERS, U.S. ARMY, IN CITARGE. PART It. RESULTS IN Pah OhME PRO Ey PSOMETR Y, OBTAINED DURING THE YEARS 1871, 1872, 1873, 1874, AND 1875. REPORTED BY FIRST LIEUTENANT WM. L. MARSHALL, CORPS OF ENGINEERS, U. S. ARMY. WITH TABLES OF BAROMETRICALLY DETERMINED ALTITUDES. 493 LETTER OF TRANSMISSION. Unitep States ENGINEER OFFICE, GeroGRAPHICAL Surveys West oF THE 100TH MERIDIAN, Washington, D. C., August 5, 1876. Sir: I have the honor to forward herewith a report upon the meteoro- logical work of the survey since 1871. It is confined to the hypsometrical work proper, since the data accumulated by the Survey is not sufficiently extended for general meteorological discussions; nor has the time at my disposal been sufficient to allow more than the examination and reduction of the observations for the vertical element of the survey. The computaticns and reductions prior to 1874 were performed under the direction of Lieut. R. L. Hoxie, Corps of Engineers, to whom is due in ‘great part the systematic organization of this branch of the work. The altitudes computed under his direction have not been re-examined or changed except where subsequent observations have been made, in which case a mean of the altitudes determined have been taken. The hourly work has all been re-examined and in some cases recomputed. Sixteen plates of horary curves deduced therefrom are appended to the report, and will be found interesting as exhibiting the great diurnal movement of temperature and barometric pressure in the drier portions of the continent. In the reduction of the observations I have been assisted by First Lieut. Rogers Birnie, Thirteenth United States Infantry; First Lieut. C. W. Whipple, Third Artillery, United States Army; First Lieut. Eric Berg- land, Corps of Engineers, under whose direction the observations taken by his party in California in 1875 were reduced. Hospital Steward Theodore V. Brown, United States Army; Messrs. F. M. Lee and George M. Dunn; and Privates Wm. Looram and John F. Kirkpatrick, Battalion of Engineers. The work of computation has been mainly performed by Mr. F. M 495 496 BAROMETRIC HYPSOMETRY. Lee and Hospital Steward T. V Brown, United States Army, who were each attached to the Survey for over four years in this branch of work. I am, sir, very respectfully, your obedient servant, W. L. MARSHALL, First Lieutenant of Engineers. To First Lieut. G. M. WHEELER, Corps of Engineers, United States Army. in charge, &c. INTRODUCTION. The meteorological observations taken by the Survey have been con- fined to those necessary for securing the vertical co-ordination of points for the maps, and the work in the office has been almost entirely directed to their discussion for hypsometrical purposes. General meteorological observations have been taken and recorded, but since these necessarily are somewhat desultory, they can be of but little use to meteorologists for climatological purposes where fuller and more connected observations have been taken, nor can they add much to knowledge where the general climatic conditions of the field of survey are as well understood as in the present case. INSTRUMENTS.—COMPARISONS AND INSTRUMENTAL ERRORS. The instruments used in the field have been Green’s mercurial cistern barometer, mountain pattern, with brass scales, adjusted in position for capillarity, reading to .002 by vernier; Green’s, Casella’s, and Pike’s aneroid barometers, pocket-size, compensated for temperature, and with attached thermometers; Green’s psychrometers, maximum and minimum pocket-thermometers; and at the astronomical stations anemometers (Thomp- son’s pattern), and the ordinary Smithsonian pattern rain-gauges. In 1871, ’72, ’73 the number of instruments at the disposal of the Sur- vey was small, but where practicable two sets of instruments were assigned to each topographical party in the field; ordinarily, however, but one cis- tern-barometer could be assigned to each, with the necessary thermometers and aneroids In later years two or more complete sets of instruments - were allotted each party, and the instrumental errors were checked by a rigid series of comparisons throughout the field-season; as a consequence, the results possess the greatest claim to confidence. 497 32 AST 498 BAROMETRIC HYPSOMETRY. At all rendezvous-camps in the first three years of the Survey com- parisons were made among all the fixed instruments for relative errors, and by these alone the instrumental errors were checked. In after years, the numerous instruments in each party afforded the means of checking their own changes. Before taking the field, all of the meteorological instruments except the aneroids were compared with the Signal-Office standard, and their relative errors determined. They were then transported to the field by hand, and at the initial points the barometers were again compared among themselves to detect changes in the adjustments of such barometers as were affected by transportation. As a rule, these comparisons were made merely pending the organization of the expedition, and, besides their value in checking in- strumental vagaries, they also afforded data for the determination of the diurnal oscillation in barometric pressure. In making the comparisons, the rules laid down in Williamson’s “ Use of the Barometer,” &c., were observed, except that the errors of the barometers and of their attached thermometers were determined separately. In the comparison in the open air of the ther- mometers and psychrometers, contradictory results were obtained at different comparisons, as a rule showing errors less than the ordinary errors of obser- vation where temperatures are read to the nearest quarter of a degree. The comparisons have therefore been rejected and the indications of the thermometers assumed as reliable, except in a few cases where the errors are large and well shown. At present, to avoid the local mutations in air temperature indicated by thermometers in the open air arising from the heat of the observer's body, from the change in temperature caused by currents of air entering the room where the comparisons are made, from the different capacity for absorbing and storing heat and consequent varying temperatures of different parts of the same building, &e., all which make it difficult to secure satisfactory and stable results from comparisons of many thermometers in the open air, the bulbs of all thermometers when being compared are immersed to an equal depth in a tub of mercury, which, secured in a wooden box, is less affected than the stratum of air in contact with both the body of the observer and INTRODUCTION. 499 the thermometers, and prevents to a very marked and satisfactory extent the local fluctuations already mentioned. In the field during the past two seasons all of the meteorological instru- ments of each party were compared at the regular hours for observing, and when from two to five barometers were carried in a party the condition of the instruments at any required date was determined therefrom. Aneroids were compared night and morning with the cisterns, and at culminating points of the trails. In some instances the cisterns of a party were all simultaneously injured, leaving breaks in the chains of comparisons for such parties. In these instances it has generally been practicable, from compari- sons with the instruments of another party or with those of the Signal- Service stations in the areas surveyed, to trace back through subsequent comparisons the individual errors of the instruments to the time of injury. In Party No. 2, Colorado Section, during the field-season, 1875, the tubes of both barometers were accidentally broken at the beginning of the field-season, and the only possible comparison of refilled instruments during the season was with the barometer of the United States Army signal station at Santa Fé, New Mexico. A long series of comparisons was there made with that instrument, which developed a correction in our barometers of more than —* of an inch to make them agree with the Signal Service barometer. Since the only probable cause of change in error of a carefully filled barometer is the difference of capillarity of the tubes, and slight dif- ference from want of rigidity where connection is made between tube and cistern, the index being upon a movable piece, and, morever, since ingress of air into the tube depresses the mercury and causes a positive error, or the barometer to read too low, it was at once evident that the greater part of this error must be in the barometer at Santa Fé. Unfortunately the barometers did not reach the final rendezvous in order, and the entire work of this party depended upon the above comparisons of instruments at Santa Fé. I had been led by comparisons made the previous year between new instruments and the barometer at Santa Fé, to suppose that that instrument read too low by more than one-tenth of an inch, which was further con- firmed as above. Rejecting this comparison, therefore, and referring the 500 BAROMETRIC HYPSOMETRY. observations made by this party at points previously well determined in altitude to Denver, Colorado Springs, Fort Mohave, and Santa Fé (with its barometric altitude), that error which gave the same or nearly the same altitudes for these points was adopted. With this error the altitudes of other points previously united were checked, and the work of the preceding two years was found to agree well with that of the past season. The results of the various comparisons of barometers are given in the tables below, from which it can be seen that the cistern-barometers seldom varied more than ’’.03 during an entire field-season, which changes, if undeter- mined, would have caused errors of from 32 to 38 feet in the resulting heights; this is less than the probable error of a single result due to abnor- mal oscillation when observations are referred to quite distant reference- stations. 501 RESULTS OF COMPARISONS. *IOMOT PLO LOT] TOA S120 aord puL ‘pavpuLys oY} uTyY Loybry PVOI S}TOMNIYSUT TOA USIS snUNU ON} TTA poJOT ov OAOKL S010 ONT, ‘MOLwrpea Aq ATAOTS nq paloood YorqAr ‘suojomIOAVG oT} Jo [vJauI oyY Aq yay Jo uOTdaosqu oyy MOAT ‘ssopiqnop ‘pegnser siqy, ‘oanyviod Mo} AIG OT) OAINDdoV 0} AanosoM OY} JO OWINJOA eAIYUe OY} LJ ONIN JO YIHUoT Qualons V Fursavy jo] O19 ‘sdoJOMOAUG OY} E1eTAr SdmIvO UT qdooxe ‘S10119 uoy po}ded100 Satjavd-ploy [vI9Aos GY} JO SdoJoMOMIE4} aLv-aedo pivpuv}s Oo} UBYy} “aySry peod A[QUIIeAUT ATIvON S10JOMMOULIGG} potor}7e EN} Ploy O49 UT + ce'0 + £0°0 + ert +! -- - 4 00°t ++} cx'0 —| co‘o +] oft +] 9¢°0 +) cot +] 01+] 920 +] 9¢'t +) ob +) art + | e600 +] 207+) cot +] est t+) opt + ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° | ° ° ° “10119 “10110 ‘ “10110 5 is hy “IOL10 "10110 "10110 “10119 *L1O119 “10110 “10119 “10119 “10110 “101190 ‘10119 “10119 "10110 ‘epre | ‘pers | Gon | ‘866L | coun | qeon [oy conr| ‘Stor | ‘oor | ‘sect | ‘cect | ‘ecex | ‘cer | ‘ort | ‘aout | ‘out | ‘oeut ot | ‘T1I9t | ‘oLer ‘ON ON | moatg | ON | croang | -cioaeg | “cxoseer | _ ON. ‘ON ‘ON | ‘ON ‘ON | ‘ON ON ON ‘ON ON ‘ON ‘ON "ON “mouRg | ‘MOLE “TOL gy a ‘mMOUeg | “Moueg |*Moivg |"mo0uweg |‘modeg |"moing | ‘Mioivg | ‘moiug | ‘Moueg | ‘mMoINg | ‘Mmodeg | ‘modeg | ‘mor x! 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Many instruments are thus proken during each field-season and refilled, making the tracing of instru- mental errors through the field comparisons, where from twelve to thirty barometers are used, a tedious undertaking. An attempt is now made to remedy this objection to the mercurial barometers by inclosing the tube in an outer casing of brass and filling the entire space between the brass and glass tubes with plaster of Paris, save along a narrow slot cut through the outer brass case for twelve inches of the scale for reading the instrument. The tube is thus supported throughout its entire: length by a nearly rigid support, and when filled cannot easily be broken save at the top, where it is not inclosed with plaster to allow of its expansion by heat. The objection to this arrangement is that the attached thermometer, which before gave only approximately the temperature of the mercury, is rendered still more uncertain in its indications of the temperature of a column protected by a porous and bad conductor of heat inclosing it. This can only be avoided by inclosing the attached thermometer also within the outer brass tube, which seems practicable. ANEROID BAROMETERS. Since the organization of the survey aneroids have been used by the topographers and geologists for relative altitudes, and when properly handled are useful, convenient, and sufficiently reliable instruments for the purposes to which they have been applied. Prior to the field-season 1873, so little was known by the individuals using them of their action and capa- bilities under the necessarily rough usage they must encounter in the field, and so much confidence was placed in their indications, that frequent com- parisons with the more reliable mercurial barometers, which are absolutely essential if results of value are to be expected, were neglected, and when the aneroid work came to be reduced it was found useful only as indicating the manner in which the instruments should not be used, and their utter worth- lessness when not employed in connection with the nrercurial barometer or 504 BAROMETRIC HYPSOMETRY. the level. Like all mechanical combinations of levers, screws, and springs, they are subject to continual shifting of parts when subjected to the jar and jolts encountered in ordinary use in the field, and it is essential that a continual watch be kept upon their indices of error by comparisons with more constant instruments. Besides the continual change in the position of the zero-point, from actual shifting of screws and other points, the fol-. lowing defects seem to be common in a greater or less degree to all ane- roids. 1. They are not compensated for temperature. 2. The elasticity of the corrugated steel chamber is affected by re- peated changes in pressure. 3. The graduation is not always perfect, and moreover the errors of graduation of an aneroid which has been repeatedly subjected to consider- able changes of atmospheric pressure seem to vary. This variation is probably a consequence of the affected elasticity or permanent change in form of the vacuum-box. 4. The weight of the machine itself affects its indications, 7. ¢., the readings of the aneroid will differ when held in different positions. In the aneroids used by us the difference is sometimes as much as 0’’.08; the ane- roid reading lower when held with the plane of the face vertical than when held with face horizontal and upward. The amount of this variation will depend upon the construction of the instrument, its size, and the weight ot its parts. To determine and separate the errors due to these various causes, when each of from eighteen to thirty aneroids is involved, calls for more extended, careful, and expensive observations and experiments than have been practi- cable or advisable, considering the value of the expected results. During the field-seasons of 1874and 1875, whenever hourly observations were taken, all aneroids which could be assembled were compared hourly with the cisterns, which gave series of comparisons extending over several days and through quite wide ranges of temperature; when the instru- ments were undisturbed and read under similar conditions, their perma- nent adjustments were presumably constant. All of these comparisons have INSTRUMENTS—ANEROIDS. 505 been examined, and, as far as they furnish data, the effects of temperature upon many aneroids in practice have been determined. The instruments were made by Pike, Ewing, and Casella, principally by the latter, of pocket-size, graduated to 0/’.05, but susceptible of being read to 0’’.01 by estimating the smaller subdivisions. The differences between the readings of each aneroid and the corresponding indications of the cistern barometer at 32° Fahrenheit were first taken to eliminate the movement in the baro- metric column itself, and these differences and the corresponding tempera- tures grouped according to the ascending scale of temperature, and the mean of each group taken. The result has been an ascending scale of temperature and a corresponding scale of aneroid differences. In a number of cases no well-marked law of variation has been apparent, which is prob- ably due to the want of a sufficient number of careful comparisons where compensation is nearly attained. Certainly in these cases the want of compensation for ordinary ranges of temperature affects the readings by a quantity less than the errors of observation. Other errors share this want of compensation even in a short series of comparisons. Of these, some are over-compensated, or the movement produced by heat is the reverse of that seen in the mercurial barometer; others are wnder-compensated, or the move- ment is in the same direction as the temperature. It is probable that no aneroid is perfectly compensated, but it is also true that in a number of the aneroids in use by us this desideratum is so nearly approximated that for all intents and purposes it is practically attained for ordinary ranges of temperature. Of about thirty aneroids examined one was affected 0.046 by a change of 39°.5 Fahrenheit. Two others were affected 0’.035-0".037 by a change of 40° Fahrenheit, and these three showed the greatest variation. These comparisons indicate but approximately the effects of temperature, but show that in the special cases examined the extreme errors in the results cannot from this cause alone exceed fifty feet. In practice the range of tempera- _ ture during each day’s travel was much less than given above and the errors from this source correspondingly less. The comparisons were made not so much for determining tables of 506 BAROMETRIC HYPSOMETRY. corrections for temperature as for getting a definite idea of the value of aneroid results, when corrections for temperature were not applied to the readings. The above-mentioned results, however, are no criterion for judg- ing of the action of aneroids other than those compared, since each instrument possesses its own individual qualities, which may be as unexcep- tionally bad as the above were unexpectedly good. The aneroids in use by the survey, though made and graduated to order, have been unaccompanied by tables of scale-error, and it has been impracticable to have them tested under the air-pump after arrival in the office. In following out the system of comparisons, however, the aneroids have been compared with mercurial cistern-barometers at numerous points, varying in altitude from 8,000 to 14,000 feet, which comparisons have all been examined and reduced. As arule these comparisons are not satisfac- tory for determining accurately scale-errors when small, since the effects of this source of inaccuracy may be combined with actual changes in the adjustments of the instruments themselves, from which they cannot be separated. Whenever the errors of scale are large, however, they become apparent from the comparisons, and the observations made with such aner- oids have been rejected as unreliable. Below are given comparisons of aneroids by Casella, Nos. 2094, 2075, and 2087, at bases and summits of high mountains. Numerous comparisons of these and other instruments at bases and summits of the higher mountain peaks of Southwestern Colorado and Eastern California give similar results and show good graduation and excellent working when the indices of error remained constant. On the other hand, comparisons of instruments made by the same maker, under the same contract and specifications, show poor graduation, as shown in the table for aneroid 2088. INSTRUMENTS—ANEROIDS. 5O7 In the table below all the aneroids in use by two of the field-parties are given as examples. The aneroids used by the other field-parties show similar action. E ; dy : Zé x os Aneroid errors. sa| 2 | 3 ee) =| oe Date pra) es cs On oO aa 2s i= 50 aes | $e No. 2094, | No. 2094. [= ov acs A iS iS) 1875. ° us ue August Soesssee- = ----=— 3 53. 6 21. 500 +.713 August (2 -22=-------- ---- , 2 48.0 18. 909 +.719 August 7...---.--- 2 64, 0 19. 553 -+-.717 August 9....-..-- 3 59. 4 18. 137 +.721 August 10” 4 57.4 21.501 +.718 August 8-10....-----.---- 7 57.4 PIG |lenecossocs Pt rst eet 2 49.6 188057) |Feaeeae=== JAW ST Ws225 eSon seoSoecs 2 56. 2 Tbsh@e lossoce.cece August 11-16.......-.---- 9 50. 7 PL). Be |e a5 SoSe INTERES Wie ececeaanes cass 2 56.5 18, 735 +. 000 August 25 3 62.9 20. 968 +. 003 August 29 5 50. 2 20. 950 +. 006 August 31f -.. 2 56. 6 19, 369 +. 077 September 1......---..--- 2 41.2 21.421 +. 069 * Same place as on August 8. + Aneroid set to agree with cistern at 32° Fahrenheit. t Index error changed 0’.07; 2088, poor graduation ; observations rejected. FI : j Sis I ae Aneroid errors. reels Bo tS Date. m2 2 16 on a) An 28 =a oc g a FA 2B No. 2088. | No. 2087. yw i) oO 1875. fo} a“ a“ “ut November 18,19 ..-.------ 2 57.8 26.718 i 198)\ ce a5.-o-= November 22,23 ...--.-- 2 70.6 28. 633 OL URIs) |eccsecace November 23, 24 ..----.-- 2 74,4 29, 107 —— O08. eaactese m= November 24-27 ...-.----- 7 68,5 29. 581 —. 028 |----.---.-. September 8 -....-...---. 12 47.0 HORAN SY | eee —. 084 September 10 ..-.-..-.--. 7 69. 4 OIPAS TS Eee eee —. 076 SEU Oe tf wise eno daeee 4 66.9 Peet Bie) | Semone se55 —.141 Ait OP ses eocaeeece Bacices 3 69.8 S0N032s eee eee —. 148 Under all the circumstances of actual use in the field the merits of the aneroids have been carefully examined, and the sum of the errors due to the. above causes determined, and whenever unadjustable errors, which are so great as to materially affect the resulting altitudes, have become apparent from any cause, the observations have been discarded as worthless. So also in nearly every case where no checks have been had upon the changes 508 BAROMETRIC HYPSOMETRY. | for several days, unless the comparisons before and after these intervals show nearly constant index errors. At best, however, there is always a feeling of doubt as to the accuracy of a result from an aneroid observation, unless the greatest care is observed in testing and using it. OBSERVATIONS. The observations taken in the field were made in accordance with the printed instructions published by the Survey, and were of the following classes : 1. Hourly observations of cistern-barometers and psychrometers at all of the main astronomical stations established since 1871, for the purpose of securing tables of horary corrections to be used in the reduction of isolated observations and the aneroid work. Such series were from eight to forty days at each station. 2. Hourly observations at rendezvous and other camps for the same purpose. 3. Cistern-barometer and psychrometer observations in camp every three hours, or at 7 a.m., 2 and 9 p. m., at which hours also all meteorologi- cal instruments of each party were compared for determining the altitudes of camps, and to furnish the means of detecting changes in instrumental adjustments. 4, Cistern-barometer and psychrometer observations on peaks and topographical stations simultaneously with observations in camp. From the nature of the case, these observations were taken whenever they could be, and not in all cases at the best hours. The summits of the peaks in most instances were high above the upper limit of arborescent vegetation, where wood for fires could not be secured, making it impractic- able to remain over night upon the station for the purpose of observation, and rendering it necessary for the ascending parties to return to camp before nightfall. The observations for these reasons are, as a rule, recorded as taken near the hottest part of the day. When, however, the ascending parties camped high up upon the flanks of the peaks ascended, the bad effects of high-temperature observations have been in a great measure obvi- ated, as will be shown hereafter. OBSERVATIONS—OFFICE REDUCTIONS. 509 5. Aneroids and thermometers were read in connection with the odometer at meander stations along roads and trails, for securing definite profiles, along meander lines, at towns and settlements, and upon the summits of divides, &c. Cistern barometers and psychrometers were also read. 6. Aneroid and psychrometer readings taken by various members of the different field parties at points which can be identified and located upon the maps without the aid of topographical notes. In addition to the readings as above given, taken for hypsometrical purposes alone, general meteorological observations, such as are prescribed bythe Smithsonian Institution, were taken and recorded. A mass of meteor- ological data has thus been accumulated which, though not sufficiently extended to be of much use in general meteorological discussions, may be of interest for comparison. OFFICE REDUCTIONS. In the computation of altitudes the observations have been compared with simultaneous observations taken at fixed reference stations, determined in altitude by the best practicable means at the disposal of the Survey. The Signal-Service stations at Corinne, Utah; Denver and Colorado Springs, Colorado; Santa Fé, New Mexico; San Francisco and San Diego, California, have been used as well as stations established by the Survey. The altitudes of Corinne, Denver, San Francisco, and San Diego have been determined from lines of level connected with sea-level. The altitude of the zero point of the barometer of signal stations at Colorado Springs and Santa Fé, New Mexico, was determined by referring these stations, by means of five months’ tri-daily observations, to corresponding observations at Denver, Colorado. The height above the sea of the top of the meridian-pier in the Mormon observatory at Salt Lake City, Utah, was determined by a line of levels run, under the direction of Lieut. R. L. Hoxie, Corps of Engineers, ‘by Assistant Engineer Gilbert Thompson, of this Survey, from the Central Pacifie Railroad bench-mark at Corinne, Utah, using the mean water-level of the Great Salt Lake as a connecting level, and this point assumed as one of the datum points for our barometric work of 1872~73. A bench- 510 BAROMETRIC HYPSOMETRY. mark was established in 1875 at Los Angeles, California, with which the zero of the barometer at the reference station there was connected, by level, by Assistant Engineer Frank Carpenter, of this Survey, with the United States engineer tide-gauge at the Wilmington Breakwater, California. The above-mentioned stations were the points to which all the baro- metric observations taken by the Survey have been ultimately referred, including those taken at the temporary reference stations established during the progress of the work. These included the main astronomical stations where hourly observations were taken, camps for a longer period than three days, and tri-daily stations established at camps of supply, &c., which sec- ondary reference stations were established sufficiently near the field of operations to give good results for relative heights, when observations were referred to them by daily means; the altitudes of these stations themselves were determined from the means of the series of observations taken at them. A list of the reference stations used during the progress of the work at which observations were taken for a longer period than four days, is given in the following table: List of reference stations used in the reduction of the hypsometric work. Altitude Observations. ~ labove sca} How determined. (feet). Station. Year. Dates. Taken. Aug. 8to Sept. 7] Hourly. Santa I'é, N. Mex. (signal]-station) - . Beaver, Utah (astronomical station) - 59 5, 915. 6 Corinne, Utah (signal- ene) 41 4,244.4 May 1 to Dec. 30} Tri-daily. we 41 4,244.4 July 13 to Dec. 31 Do. 41 4, 244.4 May 1toJuly 23 Do. 62a | 6,030.4 July 1to Nov. 30 Do. 62a} 6,030.4 June 1 to Nov. 19 Do. Caloris Springs, Colo. SSR station) 62a| 6,009.7 July 28 to Aug. 10 | Hourly. Denver, Colo. (signal-station) 58c | 5. 244.6 July 13 to Dec. 22 ae daily. Ones Pay see ee eee 53e | 5,244.6 dune 1to Dec. 30 Do. WS ease teehna beaten Dene none = 5ie | 5,244.6 July 1toDec. 1 Do. Gunnison, Utah (astronomical station) --.--. 50 5, 144. 6 Oct. 30to Dec. 2] Hourly. Georgetown, Colo, (astronomical BiatOn) 52a | 8, 487.2 June li5toJuly 6 Do. LSPS LORCA =o Se ee eee 59 5, 072.3 |. Nov. 1 to Noy. 21] Tri-Caily. Labran, Colo. (astronomica Istation) - 62a} 5,217.8 |}. Ang. 12 to Aug, 28} Hourly. Los Angeles, Cal. (rendezvous camp) - = 7e 312.5 June 14 to July 3 Do. Los Angeles, Cal. (Gartner's office) .-..--.-- 73¢ 325. 6 June 29 to Noy. 11] Tri- ridaily. Los Angeles, Cal. (Lieut. Bergland’s office) -. 73¢ 323, 2 Oct. 16 to Nov. 15 Fort Mojave, Ariz. (bench-mark) ...-..--.-- 74d 755.8 July 8toSept. 5 ete Ogden, Utab ‘(astronomical station) .... a 41 4, 376.8 |. Sept. 26 to Oct. 3 Do. Pioche, Ney. (astronomical station) . - 58 5, $42.3 Sept. 27 to Oct. 14 Do. 9 69d | 7,044.2 }.-.. a --| 1871 | Nov. 20 to Dec. 10] Tri-daily. -do .. = Aug. lto Nov. 3 Do. A = daly 1to Noy. 30 Do. 69d | 7,044.2 |... sc -| 1875 | June 1 to Nov. 25 Do. > San Diego, Gal. (signal-office) . 80 62.0 June 15 to Noy. 1 Do. San Francisco, Cal. (signal- office) couse 55 60. 0 June 15 to Nov. 1 Do. Salt Lake City, Utah (observatory) .. 41 4, 330. 4 June 23 to Oct. 5 Do. 1D) BSH s6 epee pase ae eee er ene Ss 41 4, 330. 4 |. 2|July 13 to Aug. 2] Hourly. Trinidad, Colo. (astronomical station) - ---- -- Ta} 6,043.1 Sept. 3 to Sept. 19} ‘Tri-daily. Austin, Nev., Camp neal’... ~~... 8 48 7, 520.6 |. June 10 to June 15 Do. Amargosa River, Cal...-. 65b | 3, 106.6 |. Sept. 12 to Sept. 18 Do. Big Tijongo Cafion..--..- 73c 1,556.0 |. July 16 to July 22 Do. Camp Independence, Cal..-...----..--------- 65a | 3,956.5 |. July 18 to Aug. 10] Hourly. REFERENCE STATIONS. DLT List of reference stations used in the reduction of the hypsometric work—Continued. ee ries Dare: Observations. Station. Bheat above sea| How determined. (feet). Year. Dates. Taken. Camulas Ranch, Cal ....-----.------------- 73¢ 799.0 | Barometer ..| 1875 | Sept. 11 to Sept.17 | Tri-daily. Caliente, Cal.-.....--- 73a} 1,344.1 |....d 5 Oct. 14 to Oct. 19 Do. Carlin, Nev ....------ 40 4, 849. 4 May 27toJune 5 Do. Chama River, Forks, 69b | 8,367.1 June 24 to June 30 Do. Canon Station, Cal... 65d} 2,650.0 }. Aug. 8 to Aug. 23 Do. Cottonwood Springs, N 65b | 3, 449.5 |. Aug. 31 to Sept. 15 | Hourly. Cottonwood Island, Cal .- scoard 74b 787.2 |. July 14 to July 28] Tri-daily. Cottonwood Creek, Puncho Park, Colo 61b | 9,381.1 |. June 27 to July 2 Do. Dolores River, Colo., camp on.-.----------- 61c | 9,020.6 |. Sept. 5 to Sept. 11 Do. Edgar’s Spring, Cal.-......---------- ; 65 4, 060. 8 Aug. 17 to Aug. 22 Do. Fort Wingate, N. Mex ...--.-------- z 76 7, 037.7 |. Arg. 5toSept. 9 Do. Fort Tejon, Cal......-..----- ------- 4 73 3, 245.:7 |). July 25 to Aug. 14 Do. Furnace Creek, Cal.......---------- y 65a 405.1 |. Sept. 2 to Sept. 12 Do. Kincaid Ranch, Cal.... a 3 73a| 1,769.5 |. Sept. 24 to Oct. 1 Do. Little Yosemite, Cal ........-.-------- 2 65¢ | 6,442.1 |. Sept. 27 to Oct. 14 Do. Lake City, Colo......--.---.---------- ee Gle | 8,753.4 Aug. 2to Aug. 8 Do. Las Vegas, Nev ..---- s 66 2, 017.8 Sept. 15 to Sept. 20 Do. Leach's Point, Cal 73 3, 408. 6 Aug. 21 to Aug. 25 Do. Linn Creek, Colo., Gle | 9,521.2 Sept. 12 to Sept. 19 Do. Martin’s Rauch, C: 73d | 2, 0837.6 |. June25toJuly 4 Do. Moreno Valley, N. 1a} 8,152.2 June 26 toJuly 6 Do. Purcho Creek, Colo., camp on .- 2 2 61b | 8,576.0 |. July 3toJuly 7 Do. Ray's Creek, Cal. (camp) ..--- 7c | 4,978.9 |. Ang. 26to July 1 Do. San Fernando, Cal ..-.-.. oes 73 1, 038.0 |. July 8toJuly 18 Do. Santa Paula, Cal ......... 7c 334.0 |. Sept. 6 to Sept. 11 Do. San Pedro, N. Mex..-...-- T7b | 6,364.0 |. Sept. 26 to Oct. 1 Do. Saguache, Colo.....-....----------+--------- Gld| 7%, 723.1 |. July 7toJuly 15 Do. Saguache Creek, South Fork, Colo., camp on 61d} 10, 059, 7 |. July 17to July 23 Do. Saguache Creek, West Fork, Colo., camp on. . 61d | 10, 079.9 |..- July 23 to July 28 Do. San Miguel and Uncompahgre Divide, Colo. 6lc | 9,689.4 |.... Aug. 23 to Aug. 28 Do. (camp). San Miguel and South Fork, Colo. (camp).-- - 61c | 9,700.1 |.- Sept. 1to Sept. 5 Do. San Juan City, Colo. ..--... = 6lc | 8900.8 ]..-. Oct. 18to Oct. 26 Do. Silver Peak, Nev .--.---- = 57 4, 250. 6 July 6toJuly 11 Do. Silver Cation, Nev., camp 58 6, 601. 6 July 11 to July 20 Do. Tehachapai Pass, Cal., camp 73a@| 3,931.9 Oct. 19 to Oct. 22 Tellurium post-oflice, Colo. (camp) - hte Gle | 10, 878.2 |... Aug. 10 to Ang. 16 Tierra Amarilla, N. Mex ...-.-- Eee 696 | 7,651.0 |.... Jane 20toJuly 5] Tri-daily. AUG GOCE ee eSe sei er esnocee aose oneness Gie)|) 2716.9) 2... Oct. 18 to Nov. 12 Do. Walker's Basin, Cal.-----..-.-------------- 78¢ | 3) 157.2 |.--. Oct. 11 to Oct. 15 ee In addition to the stations enumerated above, which have been used as reference stations, hourly observations were taken at Bozeman, Mount Cim- maron, Fort Union, and Las Vegas, New Mexico ; Fort Garland, Hughes, Pagosa, Hot Springs, and Julesburg, Colorado; Cheyenne, Fort Steele, Green River Station, and Laramie Station, Wyoming; Prescott and Trux- ton Springs, Arizona; Virginia City and Winnemucca, Nevada; and Sidney Barracks, Nebraska. These points were occupied at times when they could not be used to advantage in the hypsometric work of the Survey as refer- ence stations, but the horary curves have been deduced and used whenever applicable. The observations were all corrected for instrumental errors and reduced ‘to 32° Fahrenheit. Those taken at the hourly and main reference stations were then plotted, and the erratic or erroneous observations thus revealed were corrected by interpolation, using for the interpolated values those 52 BAROMETRIC HYPSOMETRY. derived from an approximate horary curve deduced from all the observations taken at the station under consideration, combined with the abnormal movement for the day. These approximate tables were also used for inter- polating observations where wanting; thus reversing the operations of eliminating the abnormal and horary oscillations of the barometer, as given in Williamson’s treatise. The hourly observations were then “reduced to level” by Colonel Williamson’s method, and the observations for those days whose well-marked horary fluctuations not materially affected by the non-periodic motion, were selected for the formation of the horary corrections given in the plates and tables hereto appended. Observations taken at hours other than those which give close approx- imation to the mean of the day were then corrected for horary oscillation, as far as the tables were deemed applicable. In addition to the horary tables deduced from the work of the Survey, those given by Williamson for points on the Pacific Coast were used for reducing the work of the California parties in 1875, when considered suitable, and approximate daily means thus secured. At camps and on the march approximate daily mean temperatures were secured from observations at 7 a.m., 2 and 9 p. m.; at other points the observed temperatures approximately reduced were employed. For mount- ain stations the following method, whenever practicable, was followed. This applied ‘when the ascending parties camped high up on the flanks of the peaks on the nights preceding and following the ascent, viz: For want of more reliable law connecting observed temperatures at two points with the difter- ence in altitude, the observations taken by the ascending party at their timber-line camp at 7 a. m., before the ascent, and at 9 p.m, after the occupation of the peak, were reduced three degrees Fahrenheit for each inch of the mercurial column, between the readings in camp and on the summit, and the reduced temperatures were taken in connection with the 2 p. m. observations on the summit, for an approximate mean daily tempera- ture to be used in the barometric formula, with the observed height of the barometer reduced to 30° Fahrenheit, for determining the height of the DAILY MEAN TEMPERATURES. 513 peak above the reference station at its base. In the work of the Colorado section, among the high peaks of that portion of the continental divide, this method gave very satisfactory and uniform results. Where the observed temperatures upon the summits of the peaks in the same area, many of them being occupied during a short time—one nearly every day—were altogether different, and, when used in the ordinary barometric formula, gave results not agreeing with the relative differences as determined by angles of elevation and depression; but when reduced, as above-described, the mean daily tem- peratures varied among themselves but a few degrees, as we should expect in the same region and season, and gave much more harmonious results. It is essential in determining the altitudes of high points where it is necessary to refer to stations at their bases, or many feet below their sum- mits, and where the want of wood for fuel makes it impracticable to remain overnight upon the summit, to adopt some device for securing approximate daily mean temperatures. Granting that the barometric formula is correct, it is at best difficult to secure the mean temperature of the stratum of air between base and summit. The atmosphere is heated only by contact with a heated body; by the absorption of heat-rays; by aqueous vapor ; by convection or by freeing of latent heat during the condensation of aqueous vapor in the formation of clouds and dew. In the almost dry air of the Western plains and mount- ains, little heat is absorbed and little disappears by evaporation where there are so few surfaces of water; but for this very reason the solar and terres- trial radiation is astonishingly great. In a single twenty-four hours the range of temperature in the shade is often equal to or greater than it is during the entire year at points in a more humid climate in the same lati- tude near the sea. For instance, at Labran, Colorado, at 4 a.m. August 27, 1873, the thermometer registered 52°.2 Fahrenheit in eight hours, or at 12 m. it had risen to 110°.6 Fahrenheit, a difference in air temperature of 58°.4 Fahrenheit. At Hughes, Colorado, at 1 p.m. July 13, 1873, the temperature was 107°.1; at 5 a.m. next morning it was 52°.8, a range of 54°.3 Fahrenheit; and again, at Cheyenne, Wyoming, October 9, 1872, at 6 a. m. the temperature in the shade was 2(°.0 Fahrenheit, and at 2 p m. same day it stood at 76°.0, a range of 56° in air temperature in eight hours. 33 AST 514 BAROMETRIC HYPSOMETRY. Such fluctuations are impossible in moist climates where a thick stratum of air intercepts by its moisture and more nearly equalizes the heat received from the sun throughout this stratum, and where so much of the heat received from the sun becomes latent during evaporation and again freed by deposition of dew at night. But they are not unusual, and are no doubt often exceeded in the interior of this continent in localities still drier than those given. The same causes which produce such fluctuations near the sur- face, prevent to a great degree the dissemination of diurnal heat throughout the upper strata. The action of the sun’s rays and their effects on the tem- perature of the stratum considered in hypsometrical work are supposed to be as follows: The heat-rays pass through the dry air of the region under consideration without great absorption, and heat the surface of the earth. The air in contact with it becomes heated, expands and rises, losing much of its sensible heat in the work of expansion and in overcoming the resist- ance to its upward motion. A continual current of expanded air ascends, which rapidly cools from radiation and work, and the sensible heat, disappear- ing from these causes, is not replaced, as in moister regions, by increments of heat absorbed by particles of vapor in the passage of heat-rays through them, nor becomes apparent by the condensation of moisture in the forma- tion of clouds. The heated particles soon radiate or lose their heat, com- municating comparatively little heat to others, and are soon sufiiciently cooled to again take part in the vertical circulation moving now downward, and before the increased temperature affects materially the upper strata not in direct contact with the earth, the air below is becoming cold, by radia- tion in the afternoon and night. It is probable then that although there are great fluctuations in temperature, as observed, within a few feet of the heating body of the earth, that the higher strata are not much affected, although there isa gradual change in the general temperature of the atmos- phere from one season to another, not only from the effects of the thermal conditions of the earth-crust, but also from the varying position of the sun with reference to the sphere of the atmosphere itself; the lack of perfect freedom of motion of its particles by which equalization of temperature would be brought about; and the capacity it has for absorbing part of the radiated heat of the sun. EFFECTS OF TEMPERATURE. 5TH In summer the sun is longer above than below the horizon, and conse- quently the earth receives more heat than it loses by radiation. The mean temperature of the stratum of air in contact with the earth is, therefore, while this increase of heat is being received, too great to represent the mean temperature of the stratum between. In the winter the reverse is the case. The earth loses more heat than it receives, and while in summer it is the heating body, in winter its crust is the cooling surface. Here, too, the transmission of the cooling effect of the earth is not aided by the particles receiving the residual heat of the upper strata by actual contact from actual motion in a vertical direction, but the quantity of the cooled particles being increased they remain near the surface, the lower strata being gene- rally the coldest during this season of the year; therefore the mean of the temperatures, even if correctly taken at two points respectively gives at different heights above the ground-level, too low mean temperatures for the stratum between. The surmise that the diurnal movement of temperature does not extend to a great height is shown by experiment to be confirmed by results by the barometric formula. When it is assumed that the mean of the temperatures at the high and low stations gives the mean temperature of the stratum between, different results are attained for the twenty-four hours, too great temperature-corrections resulting during the warm parts of the day and too small during the night; whereas a constant temperature for the twenty-four hours continued, with the observed heights of the barometer corrected for diurnal movement, gives much more concordant results. If it be true that the diurnal movement of temperature is not very appre- ciable in the higher strata, remaining nearly constant throughout the day, the yearly movement only being apparent, it would be better to use in the barometric formula the means of the observed temperatures for a longer time than one day, in connection with the observed mean daily height of the barometer at the two stations, disregarding the mean observed tempera- ture for any single day of the series. Now that the Army Signal Service has established stations upon the summit and at the base of one of the lofty peaks in the dry region of this continent, it would be well to discuss the observations taken thereat, if only with reference to the best practice in 516 BAROMETRIC HYPSOMETRY. regard to the temperature-terms of the formula in use; added to this con- sideration is the value of the sines in further investigating the constants of the barometric formula which seem to require modification. It is contended above that even if the thermometers indicated the temperature of the air at the surface, the mean of the readings of the thermometers at two points of different altitudes near the surface would not indicate the true temperature of the stratum between, on account of the various ways that sensible heat may and does disappear and reappear. Besides these reasons, thermometers at the surface of the heating and cool- ing body are subject to many causes of error in their indications, that tend to produce the same results. When the earth is warmer than the air they are affected by the radiated heat from the earth itself and from all surround- ing solid bodies, and by reflected rays of the sun, which make the readings too large. When the earth is colder than the air the reverse takes place. When, therefore, the earth is the heating body, as in summer, the indications will be too great, and vice versa in winter. The consequences of the facts that the earth in summer is the heating and in winter the cooling body, and that the observed temperatures near the surface in the summer are too high and in the winter too low for use in determining the mean temperature of the air, are seen in the results from the application of the barometric formula by which too great differ- ences of level are derived in summer and too low in winter. This may, perhaps, by the investigation of observations taken at such stations as those established by the Signal-Service upon Pike’s Peak and Colorado Springs, and at other high and low barometric stations in different parts of the world, be corrected for in the constant of the pressure term of the barometric formula by multiplying the mean value of this constant by a factor of the form (1 + /(Z)); the second term in the parenthesis giving the values of a periodic function depending not upon the differences in level so much, perhaps, as upon the latitude of the place and declination of the sun, and which, increasing or diminishing the constant factor by a variable quantity, may cause the barometric formula to give identical results throughout the year. Disregarding the effects of influences that are small and complex, it seems reasonable to hope that the form of the function in the second term PSYCHROMETER OBSERVATIONS—ATMOSPHERIC WAVES. 517 of the above value may, by examination, be empirically discovered and not be too complex for ordinary use. Or else the form of a function expressing the law, if there be one, of the relation of the observed to the true temper- ature of the air. The observations of the psychrometer were reduced by the use of the tables in Williamson’s treatise, neglecting the correction for altitude. So little is known of hygrometry at high altitudes, and the influence of the factor depending on moisture in the barometric formula of Plantamour, is so small, that the neglect of this small correction affects the results so far as altitudes are concerned inappreciably, while its application would call for nearly double the amount of work in computing the humidity only to attain results of doubtful value. From the difficulty of securing good observa- tions and results from the psychrometer, the mean daily humidity, or where practicable, the mean monthly values were taken for use in the barometric formula for the reference station, and the mean for as long a time as prac- ticable at the required station. Each observation has not been separately computed, but the force of vapor and humidity in the tables has been derived from the mean wet bulb and mean differences. From the difficulty and expense of establishing numerous reference stations in the thinly-settled regions surveyed, and the increased labor in the reduction of observations at many stations, it has been necessary to refer the observations to places in some cases three hundred miles from points whose altitudes above the sea were sought, which introduces into the results the effects of differences in phase of the atmospheric waves con- tinually sweeping over the area surveyed. From the known facts in regard to the motions and variety of contour of these waves it would be practically impossible to make corrections for abnormal oscillations where, as in the case of moving field-parties, the necessary data for determining the barometric gradients cannot be secured. In making corrections for abnormal move- ments, attempts have been made to reduce the readings at the two stations to the mean values for the entire period covered by the field-work, without reference to the motion of the waves or to the differences in barometric gradients at different points or parts of the waves. The motions and shapes of barometric waves or areas of high and low barometer have indeed but 518 BAROMETRIC HYPSOMETRY. lately, or since the establishment of the Army Weather Bureau, attracted general attention, and as yet in the Territories of the United States, in which this Survey has been engaged, the workings of this bureau are not sufficiently extended. In this connection a few general remarks are made to explain the methods which have been adopted, as far as the data at hand would allow, in reducing ovr work, and which will be more strictly and fully carried out in future. The areas of high and low barometer move with varying rates and in directions not constant in a general westtoeast course. The forms of the waves or rather areas of high and low pressure and of the isobars are innumerable: _ sometimes like troughs or waves of the sea; sometimes nearly circular or elliptical; sometimes irregularly shaped, with projecting arms, as it were, of low barometer, with barometric gradients of different degrees of steep- ness on different sides of the periphery of the bowls or troughs of low barometer. The laws of propagation of the waves or the extent of the oscillations seem to be different at different altitudes; or from some cause unknown the same rules of interpretation will not apply to observations taken at high stations as to those taken at low points. This, however, may be due to the defective formule for reducing observations to a fixed datum plane for comparison. From which it results that while we may succeed in eliminating the effects of abnormal oscillation at the fixed station, the application of the corrections deduced thereat to isolated observations at a distance would leave the results with precisely the same errors expressed in inches of the barometric column; and that this correction cannot be made unless from numerous fixed stations the isobars can be accurately traced, and the forms and gradients of the waves: correctly determined, from which the observa- tions may be corrected. This process, however, would evidently involve labor and expense wholly incommensurate with the value of the results attained, and practically impossible of application where a great number of observations at different points and at various hours of the day are involved. From the practical difficulty of securing corrections of doubtful utility no attempt has been made to correct directly for abnormal oscillations in the ATMOSPHERIC WAVES. 519 preparation of the pressure term, but the observations have been referred to the nearest of the reference stations established in the field of survey without such corrections. From the shapes of the surfaces of the waves, as shown by the isobars on the weather maps of the United States Army Signal-Service, it is seen that the surface covered by the crests and troughs of barometric waves, and the width of the areas included between isobars expressing differences of, say, 0’’.1 in barometric height (which would cor- respond to errors of from 100 to 130 feet from this cause), though great, do not justify distances so great as we have been forced to use between our points of observation and those to which the observations have been referred. To lessen the errors which must necessarily enter the results from this cause, as far as the computing force and the time at our disposal would allow, important points where altitudes have been reached with a closer approximation to accuracy have been referred to several reference stations in presumably different phases of abnormal or non-periodie disturb- ance, the point whose altitude is required falling within the polygon found by connecting the reference stations by right lines. Assuming the formula correct, the resulting computed altitude of the point, if referred to one of the stations, would be too high; if to another, too low; and if to a third, perhaps nearly correct. A mean height in accordance with the relative distances of the point from these reference stations, provided the same wave in its different phases embraced all the reference stations, is evidently better than the result from any one determination. Reasoning thus theoretically, or without sufficient facts or results from actual experiment, it seems that the following is perhaps the best and most ex- peditious method for a party working in thinly settled regions of the West, wherenumerousreference stations well determined in altitude cannot be estab- lished near the field of operations, to approximately eliminate the effects of atmospheric waves, from the resulting altitudes from barometric readings, viz: l'o establish, say at least three stations, near the periphery of the area to be surveyed, and on high points within the area. Each cistern-barometer station made during the progress of the work, or at least each station of importance, should then be referred to each of the three, and a proper mean be taken 520 BAROMETRIC HYPSOMETRY. for the result. When it is considered that it is at any rate necessary to establish as many stations—we have always had as many—and that the main portion of the labor comes, not in the final computations of results, which, with the full tables in use, are short and simple operations, but in the checking of instrumental vagaries in the field, and in the correction and preparation of the observations, which, for the reference stations, may be done as rapidly as the observations are taken, the amount of additional work in the office for the four stations is not twice that for one, with results probably enhanced in value in proportion to the number of such stations, if judiciously selected. It will be remembered, however, that the hypsomet- rical work of the Survey is simply intended for general information relating to the physical geography of the regions traversed by the surveying parties, and for the assistance of the topographers in representing on a comparatively small scale the topographical features of the country, and not for special purposes where the greatest attainable accuracy in the results, and conse- quent nicety in manipulation of instruments and in the treatment of obser- vations are absolutely requisite. The methods used where several thousands of points must be quickly computed in order that the results may be on hand for the use of the topographers in constructing their maps, which are drawn at equal pace with the computations, are such as are most expedient and best adapted to gain at reasonable expense of time and labor such results as are needed for their purposes. We are thus forced to follow such rules as may be most rapidly and effectively applied, rejecting unnecessary refinements, or such as give results not commensurate in value to the labor involved in their application; but it seems at least practicable to cancel the effects of abnormal or non-periodic oscillations from the results, in so far as it may be done as above described, and this without unjustifiable expenditure of time and work. This method presupposes that that portion of the wave included within the reference stations is a plane, which is true only for small areas; nor can the abnormal oscillation be cancelled by this method unless the observations are simultaneous, since the waves, as above stated, are in motion, and time is therefore an essential element. In the lists of altitudes hereto attached are many points where ATMOSPHERIC WAVES. yl | observations have been taken either by the same or different parties of the expeditions and at intervals widely separated. It is to be presumed that the relative phases of the non-periodic waves at the two stations in each set are different in the several cases, and that the differences in altitude are in great measure due to these differences in phase, and may be taken as representing imperfectly, but approximately, the variations and errors we may expect in other altitudes not so checked. For instance, at Fort Gar- land, Colorado, the following determinations were made at different times for the height of the same point above the sea: : iE Be 3 : ices Station. 2 Dates. se Referred to— % Be =a 6 ate a < 30 | August10-17,1674.....--. 7, 868. 1 | November 20, 1874....-.--- 7, 849. 2 | August 14, 15, 1874 ..----- 7, 863. 1 | August 17, 1874 ......--- 7, 873. 3 | July 29, 30, 1874.....----- 7, 847. 1 | November 8, 1874.-..----- 7, 837. 4 | June 19, 1874 ...--..----- 7, 863.7 An extreme variation of 30.5 feet. Fort Garland, however, is nearly north from the reference station, and since the atmospheric waves move, as a rule, from west to east, their phases were probably nearly the same at the two stations, and we attain results with differences similar to those experienced in barometric determinations where the stations are near together horizontally. At Fort Wingate the following results were attained: Ep g & os 3 Bs Station. = Dates. & = Referred to— S £3 ; 5a z 4 = eat Sn pt 2 St ee Fort Wingate, N. Mex. ..| 18 July 11-18, 1873..-..----- 7,095.4 | Santa Fé, N. Mex. Dhyassiesasnspscoros- 3 | September 22, 23, 1873-.---| 6, 918.1 Do. lO WiseeseGs ae ecko ross 18 | July 12-18, 1873.....----- 7,067.8 | Denver, Colo. Worse see ase ane 3 | August 2, 1873.-..-..----- 6,998.8 | Santa Fé, N. Mex. Do . 2.2 -eeceeeee---| 18 | July 22-28, 1875-....----- 7,098.8 | Fort Mojave and Santa Fé, N. Mex. 522 BAROMETRIC HYPSOMETRY. A difference of 181. feet between the greatest and least determination. Of the determinations above, however, the Ist, 3d, and 5th were from quite long series of tri-daily observations, and the agreement between the results is invariably good, and not to be expected where the distances to reference stations are so great (180 to 400 miles). Other determinations show similar differences, but it is rare that discrepancies of 100 feet occur between independent results. Sometimes, however, discrepancies of over 200 feet appear. From the method of carrying the barometer, on mules, strapped to the back of the rider, and exposed to jars and jolts, and from the improper means for preserving them in the field, it would be strange if changes in their adjustment did not occasionally take place. These, if undetected, would cause many of those discrepancies we attribute to non- periodic motions in the atmosphere and to other causes. The high station recommended above and prescribed in the instructions printed for the use of the field-parties of the Survey, is for use in reducing the observations taken at similar high points. Where the points occupied are in the vicinity of this station the observations are referred directly to simultaneous observations taken thereat, being mean daily temperatures, thus reducing the errors from defective temperature observations, which are directly proportional to the difference in altitude as given by the barometric pressure term. For points at such a distance from the high station that errors may result from referring the observations direct, the following course is prescribed: A semi-permanent camp will be established for several days, the altitude of which will be determined from a mean of the series of observations taken thereat, and all observations taken in the vicinity of the semi-permanent camp will be referred to it for differences of altitude, to avoid, as far as practicable, the errors from differences in phase of non- periodic waves, which would become apparent if referred to a point at a distance. The observations taken at the high station will be referred by weekly means to synchronous observations at the permanent base station, and the barometric difference of altitude deduced for each week of the series. The quotients arising from dividing the true by the computed heights will be BAROMETRIC ALTITUDES. 523 tabulated for each week of the field-season, and will give a series of factors by which all barometric differeuces of altitude determined during the period covered by the table, in latitudes and places where the diurnal range of temperature and other climatic characteristics are similar to the same elements at the permanent high stations, will be multiplied to secure results approximately freed from the effects of the cause of inaccuracy just men- tioned; or, Let h— the absolute difference of level between high and low station, determined by level, if practicable, or else assumed as determined from the means of the entire six months’ obser- vations; and =the computed difference in feet; then will h— H—=total correction to be applied to the computed difference of level; and a correction to be applied to each foot of computed differ- Hignitcn ence in level. Now let h’ = computed difference of altitude between two other stations, under similar conditions; then it is assumed that h—H sid fae correction to be applied to this computed differ- HA ence to obtain true result; and p==Jal h’ + a h or > = true altitude of station. Ee pf This method is adopted, instead of referring the observations direct to the high station, to carry out the system by which a semi-permanent reference station shall be established near the point determined, at which observations shall be taken for a sufficient period to proximately eliminate the effects of differences in phase of non-periodic waves from the altitude of this camp deduced from them; to do which requires that observations shall be taken at both stations in all phases of the waves or in corresponding phases. In making the computations for altitude the formula of Plantamour, 524 BAROMETRIC HYPSOMETRY. as represented by the tables in Williamson’s treatise on the use of the barometer, has been used wherever humidity observations have been taken; otherwise the formula of La Place has been employed. REDUCTION OF ANEROID OBSERVATIONS. In the reduction of aneroid observations the ordinary defects of these instruments have been kept constantly in mind, and the observations have been closely examined to determine the amount of dependence to be placed upon them. The records of the various aneroids have been examined, and those observations when the instruments were working satisfactorily have been taken for computation. All observations made with an aneroid when used away from a cistern for several days have been given little weight as far as absolute heights are concerned, but have been computed in many instances, and approximate altitudes secured for the use of the topographers in constructing their maps, and in representing the relief of the country surveyed by them. As arule, the aneroid has been considered as an adjunct of the cistern, to be used in connection with it, and not relied upon for the determination of the altitudes of points other than those along meander lines between camps, as explained below. Along the lines of march con- tinuous profiles have been made with the aneroid; at each meander station the odometer recorders have been required to record the readings of the odometer, aneroids, and attached thermometers, and the topographers have located the points, either trigonometrically or by their meander courses and odometer distances. At culminating points of the trails and at camps the aneroids have been compared with the mercurial barometers, so that their indications are constantly checked. In this manner it has been prac- ticable to furnish the topographers with numerous barometric bases from which by angles of elevation or depression they may determine the approxi- mate heights of surrounding natural objects. Used with frequent checks by comparison with mercurial barometers, the aneroid is merely an indis- pensable instrument for rapid profiling, since it would be impracticable to set up, adjust, and read a mercurial barometer at such frequent intervals, and at the same time make the progress on the march rendered necessary ANEROID OBSERVATIONS—REDUCTION. 525 by the scarcity of watering-places in the areas surveyed by the various expeditions of this Survey. In the computation of the profiles between camps the following method has been followed (except in 1874, when observed temperatures were used). The altitudes of camps are determined from a longer or shorter series of cistern-barometer and psychrometer observations, as already described herein. The mean of the errors of the aneroid referred to the mercurial cistern-barometer at 32° Fahrenheit, as determined at the two camps between which the profile is run, is taken as the error of the aneroid for the day, and all observations corrected by it, unless the comparisons with mercurial barometers show that the instrument has materially changed its error between the two camps, in which case the observations are rejected in toto, unless from our knowledge of the actual grades of the route we are enabled to detect the place in the profile where the change occurred, and to correct the observations before and after accordingly. The observations are then reduced to the mean of the day by applying the corrections for horary oscillation, and each station then referred to the preceding one (or to camps), the mean daily temperature, or when that can- not be approximated, the mean of the temperatures observed during the march, being used in the computation. Thus, since the aneroid is referred constantly to its own indications (which, observed by the same person, may be presumed to be affected all in the same direction by personal errors), instrumental errors are nearly eliminated from the final results or enter as differential quantities, and the error in the determination of the place of the zero-point of the aneroid does not appreciably enter the results, unless this differential error is large. Beginning at camp, the successive differences of altitude between the meander stations are then added each to the alti- tude of the station preceding, and the profile carried over to the next camp by successive steps. The difference in the altitude of this camp, as brought over from the preceding camp by the aneroid differences, and that determined ' py the series of cistern-barometer observations, is the error to be distributed throughout the profile to make the two coincide. It is evident that in thus computing this profile, we assume that there has been no non-periodic or 526 BAROMETRIC HYPSOMETRY. . abnormal fluctuation in barometric height, whereas the air is seldom or never in a state of equilibrium, and the barometer is therefore continually varying in height. Should the barometer be rising, the difference in level between the two camps as determined by this profile will be too great if we go from a higher to a lower camp, and too small if we go from a lower to a higher; and vice versa if there be a falling barometer. In the first case, when the barometer is rising, the altitude of the second camp, as carried over by the aneroid differences, will be too low by the amount in feet at that altitude of the abnormal or non-periodic movement, while the profile is being measured, and vice versa when the barometer is falling, provided the observations and the barometric formula are perfect. In distributing the error it is assumed that the non-periodic movement is uniform during the few hours that the party may be engaged in running the profile-line, and that the error from this source in the altitude of each station is directly proportional to the time; or, Let = difference in feet in the altitude of Camp 2, carried by ane- roid from Camp 1, and that computed from simultaneous observations of cistern-barometer. T = entire interval of time in minutes between instant of leaving Camp 1 and arriving at Camp 2. ¢ = interval in minutes, between leaving Camp 1 and arriving at any profile-station. C = correction in feet to be applied to the altitude of that station. Then In unimportant profiles it is sufficiently accurate for the purposes of map construction to divide the errors equally between the various stations. By this method of computation the observations are reduced with great rapidity; most of the reductions, indeed all except the final operations, can be performed in the field after the day’s field-work is over; the connection between the aneroid differences and the absolute altitudes of the camps METEOROLOGICAL OBSERVATIONS. 527 being made after the cistern-barometer observations are computed in the office. Where important routes of communication are to be profiled, however, the aneroid should not be used, but careful cistern-barometer observations should be substituted and the observations reduced separately. Appended hereto are condensed tables and summaries, with plates, representing the hourly fluctuations of barometrical pressure, temperature, relative humidity, and force of vapor, at some of the reference stations. The results are given as observed, and the curves are not in all cases smooth, but are published as material for what they are worth, and it is considered best to give the results with only such corrections as are evidently erro- neous, shown by plotting the individual observations, and with no discus- sion. The series are not of sufficient length to cancel in the means erratic, accidental, or abnormal observations of movements, particularly in the barometric and vapor curves, but are perhaps sufficient to show the main peculiarities of the meteorological conditions existing in the interior of the continent for the times of the year to which they relate. Of these, the following are the most striking:— 1. An unusually great diurnal movement in barometric height. At low points, as Fort Mojave, Arizona, 755 feet above sea-level, in the interior, this oscillation reaches in August 0’.160. Near the seaboard, at Los An- geles, California, it does not reach half this amount. At high altitudes, as at Georgetown, Colorado, where the barometric pressure is 22 inches, the oscillation is as great, or greater than, in the same latitudes near the sea- board where the pressure is 30 inches. The supposed causes of this will be mentioned briefly below. 2. Very small relative humidities and little change during the day in the absolute quantity of aqueous vapor in the air, and consequent great changes in the relative humidity on the temperature changes and non-formation of dew and clouds, save by condensation by the highest of the mountain -ranges. Small rain-fall and great ratio of clear to clouded sky, save in the higher mountains. 3. A great fluctuation in diurnal temperature, due to the dryness of 528 BAROMETRIC HYPSOMETRY- the air and consequent free terrestrial and solar radiation; to the non-freeing of latent heat in the upper strata by the formation of clouds, and during the colder parts of the night by the deposition of dew, which rarely, if ever, forms; and to the lack of free surfaces of evaporation, by the conversion of the water of which into vapor heat may become latent during the day. Variations of from 40° to 60° Fahrenheit in twenty-four hours are frequent during the summer; and from many degrees below freezing to near summer heat in winter. All of which causes produce a very rigorous continental climate, equalled only by the high interior regions of Asia. 4. Rapid responses of thermometer to the action of the sun, by which the maximum temperature is attained near noon, or some hours before it is near the seaboard, and by which the earth is shown to radiate its heat as rapidly as it is received. The temperature-curves show very abrupt move- ments of the thermometer during the day, dependent upon the free radiation and non-concentration of heat by moisture. All of the above are direct consequences of the dryness of the climate. In moister regions such fluctuations of temperature would be impossible in the same latitudes, and, if possible, would render them utterly uninhabit- able from the heating and freezing consequent upon the rapid deposition and evaporation of water, which would attend such changes in tempera- ture. While the diurnal oscillation of the barometer is not materially affected by the change in weight of the atmosphere due to the expansion and contrac- tion from the temperature oscillation and the varying amounts of aqueous vapor in the air, the rapid expansion of the atmosphere by heat received by contact with the earth, puts the entire upper air in motion in a vertical direction, and the barometer by its diurnal oscillation exhibits the effects of the resistance of the inertia of the upper air to the motion developed by expansion below, as far as its maximum, which should occur when the temperature is increasing most rapidly. The motion subsequent to the maximum expresses only the varying effects of the momentum of the moving column of air pressing upon the mercury in the cistern, upon the barometric column. HORARY OSCILLATION. 529 The weight of the column of air being the same or nearly the same, therefore the oscillation should be and is greatest for the same diurnal motion of temperature at the equator, where the same weight corresponds to a greater mass, and should grow less toward the poles. The weights dimin- ishing as we ascend above the earth, the oscillation should be greatest at the level of the sea, and less as we ascend above it. Hence, three ele- ments should be taken into consideration in comparing the range of the horary oscillation : 1. The mean barometric pressures. 2. The diurnal range of temperature. 3. The latitudes of the places of observation. The diurnal movements of the barometers at the points occupied by the Survey as reference stations have not been deduced from sufficiently long series to cancel non-periodic motions, nor to properly eliminate individ- ual errors, but they go to confirm the theory that the momentum and inertia of the air developed by the heat of the sun is the efficient cause, though aided by other causes, which produce small motions in the baromet- ric column. It is evident that if the weight of the air is diminished the only way in which, under this theory, the oscillation can be as great as before is by an increased rate of motion developed in this column, or by more rapid expansion and contraction atits base. If, therefore, we have a station at considerable altitude we would expect a less oscillation than at or near sea-level; but if the temperature at the high station increased in the proper ratio the oscillation would be equal at the two stations, or even greater at the higher. This is supposed to be the explanation of the greater oscillations ob- served in the interior of the continent, even at high altitudes, given in the plates hereto attached. 34 AST 530 BAROMETRIC HYPSOMETRY. SUMMARY OF HOURLY OBSERVATIONS papas COLORADO, FROM JUNE 16 TO JULY 5, 1873. Latitude, 39° 42’. [Pl.7, fig. 1; Pl. 11, fig.25; Pl 14, fig. 43; Pl. 17, fig. 63; Pl. 20, fig. 79.] Altitude above sea-level, 8,587.8 feet. . es = oe = fs! > > = alee z ‘eo | eu |o5 REMARKS. aS ie pon ade 5 z= = B 5 4 ay Hour. = 3 ae = Be % a = cjé 2 PROPORTION OF CLEAR AND CLOUDED SKY. Ho a a ae 2 =~ |35 \ss see os 3 a6 2 an Psy, | [tete || |i eae ncne cet ee n ee tnocceeso codecs 60. 05 a o |S ak 3 o- Jes |S Nim bag ae 9 [=a] iS) a e a=) Be 15 Gumlnsee eee eeene a 5. 65 Cirrus --..---..--- Saas pee Stratus -.------- - 4.45 ut o e i lly Peres 3 EE —.037* 5 : — ‘ . irro-stratus.-.- 7 a.m -.-- .037*| 411.7 |-45.7 | +. 021 1 1.42 | 2.3 Gino-siae at Siam —.029 | + 2.0 |49.0 | —.014 | —.036 | 1.37 | 2.3 i otal. se ete: eee ase ee 100. 00 Ofaimimece —.014 | — 4.4 |—1.9i] —.017 | +. 035 | 1.37 | 2.9 . WINDS. 10 a.m.:...| —.016 | —10.9 |—6.2 | —.020 | +. 694 | 1.53 | 3.6 TL ASN Senos —.n0s | —13.8 |—7.0 | —. 037°] +. 101 | 1.32 | 4.0 Calms.| n. | s. | BE. | w 12 mms see — (1) || iS 777 |) 082 |) SE 0D) || ey) a || ——— |__| _|—— Tse 4/013 | 214.3 [707 ||. 032) 1690 1 20 a9} Rencontre He 2p.m....--| +.023 | —15.5*|—8.8 | —.028 | +. 125i) 1.42 | 5.5 Sipsmiseee= +.035 | —14.3 |—7.7*| —.052 | 4.169 | 1.63 | 6.1 w.E. | N.w.| SE. SW. Aspom\e 2 4.043 | —12.7 |-6.3 | —.037 | +. 080 | 1.79 | 6.1 ees 2 2S E ee — et oye a (ee 7 . C95 ve , Per cent.-..| 3.28 5.26} 19.08 | 12.06 5 p.m +. 050i] —11.1 |—6.5 | —.017 | + C95 | 1.63 | 6.0 |] Per cent... SEI a) RES) Ee 6ip.m.--... +.036 | — 3.8 |—-2.5 | —.003 | +.049 | 1.36 | 6.1 7p.m.....| +.029|— 0.3} 0.0 | —.C05 | +. 067 | 1.42 | 4.6 GAROMETER: Sp.m.... | +.018 | + 3.3 |+2.0 | —.001 | —.031 | 1.32 | 4.0 Extreme range cf abnormal waves: “ 99 9 j 5 = Orpen _ee: 005 |i4= abe S. |e oe,| 039%) 26m |p. || Peon eS ear) fOspsmnieeo —.009 | + 7.9 |43.9 | +.004 | —.072 | 2.11 | 2.1 es 11 p.m-.... —.013 | + 8.0 |+4.2 | +.010 | —.076 | 1.7 1.1 Extreme range of diurnal temperature: ae a d2}pemn 222s. =, 017%] 20:3: (4-45.| 4p. 017 | .080'| 1.95 | ded |) he ene apace lan gamete are 1a.m...-.| —.016 | +10.1 |+5.2 | +.026 | —.1C0 | 1.€9 | 1.1 GREATEST DIFFERENCE BETWEEN WET AND 2a.m...-.| —.010+] 411.5 |+5.3 | +. 025 | —.C92 } 1.84] 1.1 DRY LULB THERMOMETERS. Siaqmneee —.012 | 12.1 |-+45.3 | +. 031 | —. 092 | 1.95 | 1.2 oa ee eS = Avasmntss oe —.023 | +13.2 |45.6 | +.036 | —.095 | 1.95 | 2.4 lZilgile 2 |g 5aem eens —. 029 | +14. 0+/-+46.0 | +.036 | —.100 | 1.95 | 2.5 2 2B |el|sla|e |8s Giagmeenee —. 028 | 113.2 |4-5.2 | +. 041*| —.083 | 1.53 | 3.1 A sa) ev | S72) aS [ss Sara eae ener | he eres | (Ee RD ae Grandmeans} 22. 012 64.4 | 15.9 . 204 . 000 TGSalios June 24 |3 p.m. 92. 0| 61.2| 30.8}. 270| .170 * Maxima. + Minima. GENERAL REMARKS UPON METEOROLOGICAL PHENOMENA OBSERVED. Thunder and rain, 2.13 to 2.23 p. m., June 12; thur der at 2 p. m., June 14; heat-lightning on evening of 14th; thunder and rain at 7.30 p.m., June 17; thunder and lightning at 3 p. m., June 19; thunder at ll a. m., June 20; heat-lightning at 11.20 p. m., June 28. Rain, 2.13 to 2.23 p.m., June 12; light shower at 2.45 p. m., June 13; shower, 11 to 10a. m., 14th; two showers between 4 and 5 p. m., 14th; shower at 5 p. m., June 16; storm in southwest, 3.55 to 4.29 p. m., June 19; rain from 1.25 to 2.35 p. m., June 20; intermitting rain, 9.15 to 9.40 p. m., June 20; rain from 6.10 to 12.30 p. m., June 30; again, at 1.35, July 1; turned to snow at 2.45 a. m., and to rain again 5 a. m. to 6.35 a. m., same date. Aurora borealis, pale and indistinct, 12.30 p. m., June 20. Slight fog, from 4.10 to 6.50 a. m., June 24. Snow at 2.45 a. m., July 1 (1} in.); large flakes, } inch in diameter; lasted until 5 a. m.,same date. HOURLY OBSERVATIONS. Sor SUMMARY OF HOURLY OBSERVATIONS AT GREEN RIVER, WYOMING, FROM JUNE 5 TO JUNE 29, 1873. Latitude, 41° 31’. Altitude above sea-level, 6,096 feet. (Pl. 7, fig. 2; Pl. 11, fig. 26; Pl. 14, fig. 44; Pl. 17, fig. 66; Pl. 20, fig. 84.) es & Ee a ig ae Ag |g 4 PROPORTION OF CLEAR AND CLOUDED 8KY. Re eee Peres hee ee hes | ae poo) go aee| 2 | Se) 22 |e] simian soc & Gi peed eae ESS On Alommsse ne eo et ae iim (Sibrn terete enn mareeeen Soeerrsec “ ° ° “ Cirro-cumulus -. Meee Gaal oe eerie, of5. =. 026). 058:|'2.3 | Gama eteataa Gin, meeser|| 1032") | 280,91. 021 ee. O17 | OFF | 1.8 ee eae es 9a.m..-..| —.029 | — 7.4 | — 2.8 |-. 027 |4-.076 | 1.1] 1.8 {Olaem. 23 ==,016' |) 14: | — 6.2 |—..044 |2,417'| 1.4 |1.9 TMansm soe e007 |e16. 3: — rd |= 034 ahaa) 1.4')2.9 | Calms. fem ree +.008 | —17.1*] — 9.9 |-.019 |+.164| 2.0 | 2.8 De paie eee GTe: |G Balt = (027019) 1160 | ed | a7 eee cent 11-29 2 p.m .....| +.029 | —16.0 | —10.4 |-.001 |4.172| 2.8 | 4.0 3 p.m.....| +.034 | —15.0 | — 9.7 |—.001 |4.165| 2.4] 4.2 N.E. 4p.m...-.| +.040 | —12.9 | — 8.4 [4.001 |4.153 | 2.8 | 4.2 Brae oa h-E Ose 11, 8 |= 748-008 (2.147) || 2.7 | 4b ll) Ber cent = 6p.m-.....| +.041 | — 9.9 | — 7.2 |4.013 |-4.144 | 2.5 | 4.0 Pps -) 2 0364\'— 5.6 | — 4. 142.011 4.107 | 2.0 | 3.6 She meee 8p.m.--.-.} +.017 | + 2.0] + 1.9 |—.002 |4+.005; 1.6] 3.1 Extreme range of abnormal waves: 9p.m-....|—.010 | + 5.6 | + 3.6 [4.007 |-.028 | 1.2 | 2.2 | To” ast63 inches onJune2i (Op.m.), 1873 LO ponies] = 015. 7 | 15,8 LE. 011 |. 080") 1.1 1.3 rere 11 p.m -..-.| —.019*| +10.9 | + 6.6 |4+.011 |—.102} 1.1] 1.2 Extreme range of diurnal temperature: fee ee nO 70 epetet on 793-017 |=. 0119) |- 0077" | 1.2 || Reema eae a a oe ae ears 1 w.mMs -42-| —J017. p15. 2 | 8,3 |, 023 |—.146 | 1.1 | 1.6 GREATEST DIFFERENCE BETWEEN WET AND 2a.m...-.| —.016 | +17.5 | + 9.4 |+.026 |—.185 | 1.0] 1.4 DRY BULB THERMOMETERS. 3a.m.....| —.010 | +188 | +10.1 |+.026 |-.213 | 0.9] 1.5 Se sd 4a.m.....| —.006t} +21. 0+) +11.6 |+. 020 |—.282 | 0.7 | 1.5 lel2/2|8ls8 Blase ee: —.014 | 420.1 | +11.5 4.015 |-.220| 10}/19] € | 2 | el ela| =| es Gane nia Prony lee oral esc Gon cars| ovar|rasa: ee | af ea po | Be Grandmeane| 24.075 | 65.6] 16.7| .213| .371| 1.5/2.5 | 318 Scoop m.loss|so.5|350|.233| .144 * Maxima. t Minima. Norr.—At 6 p. m., June 17, dry bulb 98.3, wet bulb 54.5. This reading must be erroneous; not used for ‘‘extreme range” nor for “ greatest difference.” GENERAL REMARKS UPON METEOROLOGICAL PHENOMENA OBSERVED. Rain, 1.39 to 1.57 p.m., June 6; same, 3.20 to 5.08 p.m., June 7; quantity about 0.20 inch; same (a few drops), at 1 p.m., June 11; same, 4.20 to 4.22 p.m., June 13; same, 8.55 to 9.05, June 14; same, 5.47 to 5.49 a. m., June 22; and from 7.15 to 7.35 a. m., same date. Thunder-storm from 1.52 to 2.30 p. m., June 7. 532 BAROMETRIC HYPSOMETRY. SUMMARY OF HOURLY OBSERVATIONS AT LOS ANGELES, CALIFORNIA, FROM JUNE 11 TO JUNE 28, 1875. Latitude, 34° 03’. Altitude above sea-level, 325 feet. (Pl. 7, fig.5; Pl. 11, fig. 27; Pl. 14, fig. 45; PL 17, fig. 62; Pl. 20, fig. 82.] = ra U as ~ 2 | + 22,| 2 | 2s | 22/2. | — pain q 22 ie z 5 5a A g z 4 PROPORTION OF CLEAR AND CLOUDED SKY. Hor. | 25 | & [eds] y | o8 | 8/25 35 & |-vE=l] 0 Bo | 2a lee “0 Be” | & |gse) 2 | 82 | 2) ec 3 ea) Ho |S lem ee} BS |o af Girro-commlis esses eee eee 2.7 u“ fo} ° “1 Cirro-stratus...-. 0.1 7a.m..... —. 032 [+ 2.4 |+1.2| +.010 | —. 042 | 0.66 | 7. 89 || Ggzlostratus te 8a.m..... —.044*|— 1.5 |—1.1 | +.011 | +.660 | 1.00 | 7.56 GORI eM SP ER i000 9 fyi o-oo —. 036 |— 5.2 |—2.1 | —.026 | —. 092 | 1.00 | 6.67 hee, 10 }eon eee —. 033 |— 8.9 |—3.6 | —.047 | —.141 | 1.22 | 2. 44 11 a.m -....| —. 022 |—10.4 |—4.6 | —.045 | +.172 | 1.56 | 0.56 Calms.) N. | S. | E.| W. WD oaseose —. 012 |—11. 9*|—5.1 | —.058 | +.186 | 2.00 | 0.11 ame Per cent... 44.4 1.4 6.5 | 0.5 (30.10 1S psi —.005 |—11.1 |—4.5 | —.061 | +.168 | 3.11 | 0.11 || Force ...--.|.-.... 2.0] 20/10/24 Db oso +. 004 |— 7.9 |—3.1 | —. 043 | +.124 | 3.11 | 0.11 3 p.m-.---| +.013 |— 7.1 |—3.0 | —.032 | +. 123 | 3.00 | 0.06 N.E. | N.W.| SE. |S. W. Aisa +. 026 |— 6.4 |-2.9 | —. 022 | +. 121 | 3.33 | 0.00 x Stee 3 2. - . 2 Bp.m..... SAEs a VOD) || = AP PEN PAC ON Oyailieeaece) gall asl al Shs 6p.m-.... +. 033 |— 3.6 |—1.4 | —.016 | +.067 | 2.78 | 0.00 Wf TD so5ce +. 028 |+ 1.5 41.0] .000 | —.034 | 1.11 | 0.00 BAROMETER. sce) 24: : i . 009 | —. 123 | 0. Le Ext f ab: 1 : 8p.m-. +. 019 |+ 5.1 |4+2.7 | +. 009 - 123 | 0.89 | 0.33 From 29.797 ine ieereaoS (2m, 1875, ODN cases +. 010 |+ 6.7 [43.1 | +.022 | —.146 | 0.56 | 1.00 || To 29.541 inches on June 25 (9p. m.), 1875. TO TST oco5e ++. 006*|+ 6.6 |4+2.2 | +.035 | —.115 | 0.44 | 3.56 TE. MH 7D 2 +. 007 |+ 7.4 |42.9 | +.039 | —. 132 | 0.11 | 5.89 Extreme range of diurnal temperature: 12p. m—=_-=| £009) 7.6 £3.38 |. 030) | 157 [00 | 7256 | emer enone a Lomas +.006 |4+ 7.7 |4+3.3 | +.030 | —. 157 | 0.00 | 8.11 GREATEST DIFFERENCE BETWEEN WET AND PIE BIN ooaon +.007 | 7.7 |4+3.3 | +.030 | —. 157 | 0.11 | 8.11 DRY BULB THERMOMETERS. BAM oso +. 006t/+ 7.9 |-+2.8 | +.049 | —. 125 | 0.22 | 8.56 == 1 =] 4s] = Avaamieeeee —.004 |+ 8.0t/43.1 | +. 042 | —.144 | 0.44 | 8.56 a 2 2 8 lea Bp = oc —. 012 | 7.6 |43.1 | +.036 | —.145 | 0.56 | 9.56 || Bl]el/eia/é ER Ganmny. ae —.017 |+ 5.4 [42.6 | 4.017 | —.117 | 0.44] a56 |] 9 | & | A | EA |e LBS Grandmeans| 29.674 | 63.9] 4.8] ..439| .744 | 1.28 | 3.97 | 528730| om. | exe lersliz7).4i8| om I * Maxima. t Mivima. HOURLY OBSERVATIONS. 533 SUMMARY OF HOURLY eS SANTA FE, NEW MEXICO, FROM JUNE U1 TO JUNE 20, 1873. Latitude, 35° 41’. Altitude above sea-level, 7,044.2 foet. (Pl. 7, fig. 6; Pl. 11, fig. 29; Pl. 14, fig. 47; Pl. 17, fig. 65; Pl. 20, fig. 81.] ee SS \ . < . ~ s 5 oH B 4S) Bla fo |e eS Pe Pee ee LD ie Ta = 3 2 a ie pS B 25 3 = 4 || provortion oF CLEAR AND CLOUDED SKY. our. 32 LS (333 a £ a Po) as Per ct. eS | & |gg8| 8 | Be |E8 Ec as ~e Ole rez = 3 See me We Wes 0 ae 1.9 " ° ° ” Cirro-cumulus .-------.-.-----.---- - 6.4 Cirro-stratus -..-.-.----------------- 5.3 Yi es tecons —. 026 | — 6.0 |—1.1 | —.048 | 4.053 | 1.3 | 2.0 || Cumulo-stratus 8.4 8 a.m ...-.. —,027*| — 9.6 |—3.8 | —.048 | +.099 | 1.0] 1.4 Motalcsat oe rose eee aceseaee 100.0 9a.m.....| —.029 | —12.4 |-5.8 | —.044 | 4.182] 1.3] 1.6 evs 10 a. m -.--- —, 025 | —13.4 |—7.5 | —.022 | +.160| 1.4 1.5 ivasms. - —.020 | —13.6 |-7.6 | —.023 | +.162 | 1.3] 3.4 Calms.| N. | S. | E. | W. 12m ...-.--.| —.006 | —13.9 ;|—8.0 | —.033 | +. 168} 1.6] 3.1 a ; ieee Sead - é 3.3 | 8.0 . tpi: 4.004 | —14.1|-8.2| —.019 | 4.371 | 2.0 | 4.1 || Force 220)... La| uiles| 17 2p.m....- 4.018 | 14.2 |-8.3 | —.011 | 4.178 | 1.7 | 62 3 p.m ----- +.028 | —14.3*|—9.1 | —. 003 | +. 186 | 2.1] 7.4 N.E.| N.W.| S.E. |S. W 4 pam -e--= +. 037 | —10.8 |—7. 2) 4.007 | +.163 | 2.0) 7.3 B pel 2... 4.0444] — 8.8 |-5.4 | —.004 | 4.134] 1.9] 6.8 ene ea aa ee erie cas 6p.m.-.... +.037 | — 4.2 |-2.7 +.005 | +.090 | 1.6 | 6.6 THB eeisec +.033 | + 2.1 |41.4 | +. 006 | +.007 | 1.3] 5.1 BAROMETER. p 4 b —, 3 6 Ext f ab: 1 : apm ...-| 4.085 | + 5.2482 | +008 | 090 | 1.6/5.2 | sais sun de 9p.m...-- +.004 | + 7.6 |+5.1 | +.060 | —. 097 | 1.4] 4.6 || To 23.288 inches on June 18, 1873. 10 p.m -.--- —.006 | + 9.9 |46.0 | +.009 | —.124 | 1.6] 2.9 Bree Mifpym\eo-== —.012*| +10.4 |4+6.4 | +.006 | —. 140} 1.0] 1.8 pene range of Wea temperature: 90,4, at4a.m., oni , 1873, 12p.m..... _.o10 | 411.6 [46.9 | +.010 | —.157 | 1.8 | 2.4 || -ro™ Ae grata ce on jane ee dee Laem __--| 008 | -18,3-57.7 | 014 | — Temp) SOs 6 GREATEST DIFFERENCE BETWEEN WET AND 2a,m...-.| —.004 | +15.0 |+8.6 | +. 016 | —. 223 | 0.9/1.8 : DRY BULB THERMOMETERS. 3 a.m —---- —. 002+} +16.1 |4+-8.7 | +. 027 || ileal | Woe = pase a |) S| se ldo 4a.m ..... —.007 | +17.2 |4+8.6 | +. 042 | —.215} 1.1) 2.2 E = & & 3 =a Br Specs —.020 | +17. 4t/4+8.9 | +.038 | —.230] 1.1] 2.3 £ 5 SS pe | se a : A H |A|EF Ala |e Gisqmee a —. 023 | + 5.2 |+4.4 | —.018 —,079 | 1.0) 2.6 ee rl Pe 1873. ° ° ° au Grand means| 23. 361 | 70.1 | 14.1 . 308 . 449 1.4 | 3.5 || guneig| 4p. m.| 98.3 | 64.5/33.8].299] . 164 * Maxima. Minima. 534 BAROMETRIC HYPSOMETRY. SUMMARY OF HOURLY OBSERVATIONS AT COLORADO SPRINGS, COLORADO, FROM JULY 29 TO AUGUST 10, 1873. Latitude, 38° 49’. Altitude above sea-level, 6,030.4 feet. [P1.7, fig. 4; Pl. 11, fig.30; PL 14, fig.48; PL 17, fig. 61; Pl. 20, fig. 80.] 2.14 3) 2 ict rales = Hour. 32 & Be: % SOO Eclipse go ecg elee “ ° fo} “ 7 asi =2-- —.030*|+- 0.6 |+-2.6 | —. 058 Siasmi=a-s-- —.028 |— 5.7 | 0.0 | —.097 9a.m==-= —. 028 |— 8.5 |-2.6 | —.070 10a.m -.-..| —. 021 |—12.9 |—6.1 | —. 050 iasm\es-- —.013 |—13.3 |—6.5 | —. 046 12m sos —.001 |—13. 3*|—7.0 | —. 032 dips Se= =" +.014 |\—13.4 |—7.3 | —. 025 2 psm)ss-<2 +. 034 |— 9.9 |—6.6 | +. 017 3 p.m --.-- +.043 |\— 8.6 |—5.6 | +. 013 Aspsmn eo--- +.045 |— 7.0 |—4.3 | +. 006 5 p.m-.--.| +.047t\— 5.4 |—3.0 | —. 002 6 p.m-..--] +. 042 |— 2.2 |—1.0 | —. 003 dGpamieaee +. 022 |-+ 1.6 |4+1.1 | +. 003 Sip: meee. +.005 |-+ 3.5 |4+1.9 | +.013 OypiNesss —. 006 |4+ 4.8 |42.2 | +. 025 10'p.m 2.52 —.017 |4+ 5.7 [42.8 | +. 023 1ikpsmieees —.017*|\+ 8.2 |+3.6 | +.039 12pm —.017 |4-10.1 |4-4.6 | +.041 la.m-.-..| —.014 |+10.8 |+4.9 | +. 042 2 am meee —.013 |+10.9 |+4.8 | +. 046 SST Soe —. 011 |4+11 9 |+5.3 | +. 047 Aas There —.0117/+12.5 |+5.2 | +. 059 5a.m --_-- —.013 |412.71/+5.3 | +.059 6 a.m ..... —. 023 |+ 9.1 |+4.6 | +. 026 Grandmeans| 24.262 | 67.8] 7.5 431 Relative humid- ity (per M.). | | omc = © _ Died diana ae wo eS) Til | (<= Joh =) 1} ~ Oo > ore oS mean force (10 max.). Winds, ~ on Fete gia Corie eee. Rife ie Pie Dee ep Sey © on i Sol eS ; REMARKS. z 4 PROPORTION OF CLEAR AND CLOUDED SKY. se ae so om aU 2 ee ee ewe ee wen eens Cirro-cumulus .......-....--------.. j Cirre. straits Bee ean ne cconseeaes 3.58 Cumuluo-stratus < 4.17 PED Uns sees esse 3.83 WINDS. 4.25 Calms.| N. | S. | E. | w. 5. 08 eee) ee 2 4 83 || Percent....| 9.4 |17.2 |5.2 |28 |5.6 IPROKCe beeen nieeeene 1.61] 1.80 | 1.87) 2.25 6.60 | bee N.E. | N.W. | S.E. |S. W. 7.08 7.42 || Percent....} 9.4 | 22.00] 21.00] 7.4 ~- || Force .-.-- 1.89 171 1. 67 1. 43 7.73 ~ 97 £569 BAROMETER. 6. 67 Extreme range of abnormal waves: 6.17 From 24.108 inches on July 30 (1 p. m.), 1873, = To 24.387 inches on Aug. 2 (9 a. m.), 1873. 6. 42 THERMOMETER. 6.25 Extreme range of diurnal temperature : g 5,17. || Erom 919.1, at 4 p. m., on July 31, 1873, : To 50°.0,at4a.m.,on Ang. 1, 1873. 5.17 _ .. || GREATEST DIFFERENCE BETWEEN WET AND 5.25 DRY BULB THERMOMETERS. 4.25 2/4/42 = a =} |) = a ] ce S BR |) Se 4,45 é 3 &a/i/s/6 5 =a 4.92 3 e|/el/s|se]e | es i=) & | RO 4.08 200 is al WEE BP 4.50 1873. o | 0 2 ” July 31|1p.m.| 91.1 | 63.6) 27.5).317 .217 547 || Aus: 4|3P-m.| 84.9 | 64.0) 20.9)..... Pes Aug. 5/2p.m.) 90.2 | 67.3/22.9)..-..|..... + Minima. HOURLY OBSERVATIONS. 5395 SUMMARY OF HOURLY OBSERVATIONS AT SALT LAKE CITY, UTAH, FROM JULY 13 TO AUGUST 1, 1872. Latitude, 40° 47’. Altitude above sea-level, 4,330.4 feet. [P1.7, fig.3; Pl. 11, fig.28; Pl. 14, fig. 46; Pl. 17, fig. 64; Pl. 20, fig. 83.] oe a ae 8 Be Ee) eo pct wee |, © ee |REleu Hour. $5 a See % 28 SiGe He | & |ese| 3 | Se (2elze 3 ao |e8a| 8 | s= Eels™ a = |e & ge |e=|5 a“ to} (o} a 7a.m-.....| —.031 | — 0.3 | + 4.9 | —.104 |] —. 100 |-.--| 2.8 Seg oness —.036*| — 4.1 | + 1.9 | —.088 | —. 026 |----| 2.5 9a.m...-- —,.032 | — 6.3 | — 0.7 | —.069 | +. 024 |.--.| 2.3 10a,m..... —,029 | —10.3 | — 4.4 | —.046 | +. 081 |.--.] 2.3 l1a.m-.....| —.022 | —11.4 | — 5.3 | —.042 | +. 094 |.-.-| 1.9 12m ....--.| —.014 | —14.4 | — 8.4 | —.020 | +.188 |.--.] 2.1 i, pomeeeae —,003 | —15.1 | — 9.3 | —.014 | +. 141 |.--.| 2.4 2p.m..... +.010 | —15.7*| —10.5 | +. 001 | +. 162 |.---) 2.6 Sipamieeeee +.015 | —15.2 | — 9.7 | —.008 | +. 147 |.--.| 2.6 4p.m..... +,029 | —15.7 | — 9.7 | —.020 | +. 152 |.-.-] 2.5 5 p.m..... 4,040 | —12,6 | — 7.4 | —.016 | +. 128 |---.| 2.2 6p.m.....| +.043t] — 7.1] — 4.4] .000 | +. 092 |.-..| 1.6 7p.m...-.| +.037 | + 0.4 0.0 | +.011 | +. 026 |.-..} 1.8 8p.m....- +.029 | + 6.0] + 1.7] +.046 | +.007 | -- | 1.6 9p.m.....| +.014 | + 8.0| + 2.5 | +.052 | —.017 |-.-.| 1.9 10 p.m-.....| +.010 | + 8.8| + 3.3 | +.062 | —.029 | .-.| 1.6 11 p.m.....| +.005 | +11.3 | + 5.2 | +.044 | —.071 |....) 1.7 1 Qppamnyaeeee +4.005 | +13.0| + 6.5 | +.040 | —. 108 |....| 1.9 la.m....-| .000| +13.3 | + 6.5 | +.044 | —. 107 |.-.-] 2.6 2a.m...-.| —.004 | +13.3] + 6.4 | +.045 | —.103 |.-.-| 1.8 Stage —.007 | +-15.1 | + 7.2 | +.050 | —.126|..-.| 1.9 4a.m...--| —.013 | +17.2 | -- 8.6 | +.047 | —.170 |....) 2.4 5a.m..... —.022 | +17.94] + 9.4} +.038 | —. 201 3.1 6a.m.....| —.023 | + 7.2| + 6.1 | —.024 | —.115 | --.) 3.1 Grand means} 25. 650 74.5 Til . 305 Site asee eee * Maxima. REMARKS. PROPLRTION OF CLEAR AND CLOUDED SKY. Per ct. Cloarcen sec se nen seveder=-h-~ssos=s W741 Nimbus..-.-. 3.3 Cumulus. - 9.3 Cirrus ..- 3.3 Stratus -- 0.5 Cirro-cumulus 3.4 Cirro-stratus.--..- oceccecrscese 0.1 Cumulo-stratus - .------------------- 3.0 Motalepesstses ae eee 100. 0 WINDS Calms.| N. Sa) Elwes Per cent.--.| 61.7 |.----. 4.6|4.1| 72 Force ..-..-|-------|-----: 2.2)1.4] 13 N.E. | N.W.| S.E. |S. W. Percent..-.| 4.1 8.7 5.9 3.7 Force .----. 1.2 1.7 2.0 1.6 BAROMETER. Extreme range of abnormal waves: From 25.953 inches on July 30 (9 a. m.), 1872, To 25.442 inches on July 28 (6p. m.), 1872. THERMOMETER. Extreme range of diurnal temperature: From 87°.0, at 3 p. m., on July 30, 1872, To 449.8, at5a.m., on July 30, 1472. GREATEST DIFFERENCE BETWEEN WET AND DRY BULB THERMOMETERS Pine £/&|2|34 S|) Selee le | Sa) alee, A ss] AJE|a|a A= 1872. o Jojo} u July 19 | p.m. 99. 0 | 63.7) 35. |. 281) .151 + Minima. GENERAL REMARKS UPON METEOROLOGICAL PHENOMENA OBSERVED. Rain-fall, slight sprinkles between 1 and 5 a. m., July 14; from 9 to 9.30 a. m., 14th; at 9 p. m., 18th; and at 1 a.m., 19th. - Thunder and lightning, 10 to 12 p. m., 23d; the same, with s_rinkling of rain, at 11 a,m.,24th. Thunder to the north, from 11 to 12 a. m., 26th. 536 BAROMETRIC HYPSOMETRY. SUMMARY OF HOURLY OBSERVATIONS AT HUGHES, COLORADO, FROM JULY 12 TO JULY 23, 1873. Latitude, 39°59’, Altitude above sea-level, 5,021 feet. [P1.8, fig.7; Pl. 12, fig. 35; Pl. 15. fig.53; Pl. 18, fig. 71; Pl. 21, fig. 87.) 3 ies z rte ees REMARKS. ihe oe Pa “ g, Hs = a oa ae am a 2 a af = S & * te) a = 4 PROPORTION OF CLEAR AND per Hour. og & ss S £8 ow 3é (Cleary eee ane eee ee 64.1 |B |Ge2| 2 | 22 [22/22 |(emiieccccccccccoo if A = |2 = a [ea Sas ee 13.3 Cirro-cumulu 1.5 4“ ° ° ° | Cirro-stratus.-- =e 4.2 HEM ieeee 2009 || ei7g) [Pegs O18 | aoe ay een | (canon | anne Pics 8 a.m ----.| —.035*|— 1.2 | + 1.1 | —. 034 | 4.022 | 1.3 Ee Jlasmieees. —.034 |— &7 | — 3.4 | —.044 | +.097 | 1.2 . 10asm i. | 028 |-15.5)| — 8.7 | 08h ||. 167 | ain far 1l a.m -..-.| —.015 |—17.6 | —10.6 | —. 023 | +.188 | 1.3 12m -....-..| —.007 |—20.0 | —12.6 | —.018 | +.206 | 1.6 23 oS 1p.m_....| +.017 |—22.2* —14.4 | —.014 | +.222 | 1.3 : 2 pone 2222 +. 034 |—22.1 | —15.2 | +. 004 +.230 | 1.5 S. Ww. 3 p.m--:..| +.041 |—20.1 | —13.8 | +.006 | +.220 | 1.2 4p.m-....| +.047#—15.1 | —10.0 | 4-.003 | +-.186 | 1.4 15.6 5Sp.m..... +. 045 |—10.8 | — 7.4 | +. 011 | +.161 | 1.4 | 5. 6p.m..... +.045 |— 8.4 |— 5.4 | 4.004 | +.135 | 1.5 | 5.8 | eetens 7 p.m +. 027 |— 1.8 0.0 | —.018 | +. 046 | 1.0] 5.2 Extreme range of abnormal waves: 8p.m..... +. 006 |+ 6.4] + 4.9 | —.007 | —.056 | 1.2 | 4.5 175° SifG0 nchesom July 127 img terse 9p.m ....| —.006 |4+ &7 | + 6.1 | —.601 | —.084 | 1.2 | 3.7 THERMOMETER. 10 p.m -....) —.009°|4+11.1 | + 7.3 | +.004 | —.117] 1.1] 2.9 Satie ea eee THR = —.007 |4+11.6 | + 7.3 | +.011 | —.115 | 1.2 | 3.8 || To 52°.8, at 5a. m., on July 14, 1873. 12 pam eee —.001 413.7 | + 8.3 | +.018 | —. 144 | 1.5 | 3.6 || creavesr DIFFERENCE BETWEEN WET AND 1a.m.....} —.0014+15.1 | + 8.8 | 4.026 | —.159| 1.7 | 4.3 it aor Ok cage ag 2a.m.....| —.004 |416.6 | + 9.3 | +.033 | —.175 11.1] 2.3 adlelehs Sa.m .....| —.003 |+17.6 | $10.2] +.026|—.210/10/27/ 5 | g |B/S/E]s dam ct. —.010 |4+19.0 | 410.8] +.030|—233}08]/23] 2 | § |e lel/s8le 5a.m.....] —.024 /+21.34) +12. 0 | -+.033 | —.283.| 0.9 | 2.0 |] aga (eas VO | fe 6 a.m --....| —.029 |416.8 | +10.6 | +.006 | —.231 | 1.1 | 3.9 || July 15 |2 p. m. | 108.3) 62.1) 46.2 |*. 233+. 083 Grand means) 25.094 | 76.8 17.1 . 333 -411 | 1.2 3.6. * Approximate. * Maxima. t Minima. GENERAL REMARKS UPON METEOROLOGICAL PHENOMENA OBSERVED. Thunder in the south at 12 m., July 12; same, in southeast, 2.30 p. m., July 22; same, in northwest. 3.25 p. m., July 23. Thunder and lightning at 4.35 p. m., July 14; same, at 2.35 p. m., July 22; same, at 7 p. m., July 22. Lightning to the north,9 p.m., July 16; same, to the south, 10 p-m., July 17; same, to th» south,8 p. m., July 18; same, to the northwest, at 5 p.m.,and to the southeast, at 5.20 and 9 p. m., July 23. Rain, 7.30 to 7.40 p. m., July 14; same, 11.30 to 11.40 a. m., July 16; ¢rizzling rain at 11 p. m., July 17; slight rain at 3.40 p. m., and from 7.30 to 7.40 p. m., July 21; intermittent rains, 3.40 to 7.40 p. m., July 22. HOURLY OBSERVATIONS. 537 SUMMARY OF HOURLY OBSERVATIONS AT CAMP INDEPENDENCE, CALIFORNIA, JULY 19 TO AUGUST 9, 1871. Latitude, 36° 50’. Altitude above sea-level, 3,956 feet. (P18, fig. 8; Pl.12, fig.34; Pl. 15, fig. 52; Pl. 18, fig. 72; Pl. 21, fig. 85.] REMARKS. PROPOLTION OF CLEAR AND CLOUDED SKY. Cirro-cumulas - . Cirro-stratus -.-- Cumulo-stratus Oba) ee ee eee oe ee WINDS. Calms| N S. | E. | W Per cent.--.| 26.9] 10.4] 7.4/4.9] 4.8 BOX) oe: a 1.3)| 2:2:) 11 1.3 N.E. | N.W. | S.E. |S. W Per cent 23 20.8 19.9 2.6 Force ..--.-. 13 1,9 1.6 1.9 BAROMETER. Extreme range of abnormal ‘waves: From 26 126 inches on July 23 (8 a. m.), 1871, To 25.684 inches on July 27 (5y;.m), 1671. THERMOMETER. Extreme range of diurnal temperature: From 949.5, at 2 p.m., on July 25, 1871, To 520.0, at5a.m., an July 26, 1871. GREATEST DIFFFRENCE BETWEEN WET DRY BULB THE: MOM: TERS. AND a \2|2|2l3¢ : ._ |e l/e&/ea| ele < 5 Saal ganl | as” lee Seatlessies S S 2 = SE ie ea A is a IE | ee Els 1871. ° ° ° uv July 27] 12 m.| 87.6 |55.8|31.8]|.207| . 159 : = 3 : 3 a ee ae Seo ESSA eee Bs a BE ace 2 de | ESS =e Bm esieee| eo Nea iies |e A a |e es eo Ssh VS “a ro) fo} uw Tames ==: —.039 | + 5.3 |43.4 | +.007 | —.056 ] 1.1] 1.3 Sia, mi --2-- —.044*} + 1.3 |41.2 | —.003 | —. 016 Pid) £5: Qa eI) are a —. 040 | — 3.7 |—1.5 | —.017 | +.027 AT a8 ea 10 a.m .....| —.036 | — 7.7 |-2.8 | —.045 | +.042) 1.0) 1.4 {Wilkens eee ae —. 027 | —10.7 |—3.8 | —. 067 | +.052] 1.1] 1.5 io smnee= ae —. 018 | —12.2 |—4.8 | —. 065 | +. 067 153) |) 176 jose Be --.004 | —13.7 |—6.0 | —.063 | +. 081 188) |) 223) 2p.m.....| +.019 | —14.5*|—6.9 | —.056 | +.093 | 1.5 | 2:1 3p.m...-.| +.037 | —14.0 |-6.4 | —.059 | +.086 | 2.0 | 2.4 4p.m..... +.053 | —13.1 |—6.2 | —.050 | +.086 | 1.8 | 2.0 By] os hits see +L. 069+} —10.3 |—4.2 | —.052 | +. 061 1.7 | 2.0 6p.m..... Be 4052) || — 4. 7} 2. 1 =O? |b 4-2 037 [0 1.9) |f2:0 7p.m...--| +.042 | + 0.9 |+0.1 | +. 013 +. 007 1.4] 1.7 8p.m..... +.029 | + 3.2 [41.1 | 4.016 | —.007 | 1.3] 1.9 O\pam) 2.2: +.006 | 4+- 5.0 |-+2.4 | +.027 | —.023] 1.0] 1.3 10 p.m.....| —.007 | + 6.4 |+3.1 | +.025 | —.044| 0.7] 1.0 11 p.m.... | —.008 | + 7.0 |43.1 | 4.032 | —.041 | 0.8] 1.1 12 p.m.....| —.012"| + 8.3 [43.4 | +.042 | —.044] 0.8] 1.0 lam .....| —.008 | + 9.7 |+3.7 | +. 052 | —. 047 PON Osa Deal cas —. 006+] +10.7 |+3.8 | +.061 | —.045] 1.0 | 0.7 Siac mse: —.008 | +11.5 |4+3.9 | +.069 | —.045 | 0.9 | 1.0 4a.m..... —.014 | 412.9 [45.0 | +.065 | —.072] 0.7 | 0.7 5 a.m ...--| —. 022 | +13.21|+6.1 | +.048 | —.106] 0.8 0.6 Giasmi ssc. —, 042 | + 9.0 |-4+4.5 | +.030 | —.072] 1.1] 0.6 Grand means} 25. 923 75.4 | 17.7 . 308 349} 1.2) 1.4 * Maxima. + Minima. 538 BAROMETRIC HYPSOMETRY. SUMMARY OF HOURLY OBSERVATIONS AT BEAVER, UTAH, FROM AUGUST 8 TO AUGUST 25, 1872. Latitude, 38° 16’. Altitude above sea-level, 5,915.6 feet. (Pl. 8, fig. 9; Pl. 12, fig. 31; Pl. 15, fig. 49; Pl. 1a, fig. 67; Pl. 21, fig. 86. Hour. ES ORT osoce Giasmie- ee Grand neans| 24. 288 3 ne = Sey RES REMARKS Sh eS 152 g E> | o4# | ss eee HD 3 mr fe S Els Bs gy PROPORTION OF CLEAR AND CLOUDED SKY. £& a Ze $s} 4 22 = || 2s : es SS oS | 2 e® | & lege] 2 | Sp | 22) Ee 3 £ [S2)8 a | € S27| & | a7 leslie “ (9) ° h —. 038 |+ 5.7 |+5.2 | —.019 | —. 086 | 0.35 | 2.09 -| —.048"|4 1.1 |43.0 | —.037 | —. 042 | 0.29 | 2.53 —.040 |— 4.6 |-1.2 | —.025 | +. 034 | 0.71 | 2.35 —.035 |— 8.1 |-4.3 | —.013 | +. 081 | 1.23 | 3.00 Feral aa le le ee —. 023 |-10.7 |-6.0 | —.014 | +. 101 |.1.47 | 3.08 —. 008 |—12.3 |—7.3 | —.012 | +.116 | 1.76 | 3.25 Boa 40. 68 22 oe ne 2D +. 005 |-13.3 |-8.2 | —.008 | 4.197] 1.98 | 3.72] di |e +.018 |—14. 2*|—8.6 | —.011 | +.129 | 2.18 | 3.99 See cay eee +. 038 |—14.4 |—9.1 | —.006 | +. 126 | 2.23 | 3.80 +. 047 |—13.2 |—8.3 | —.006 | +..128 | 2.12 | 2.96 || Per cent....] 1.72 Be 10.78 | 28.43 +. 054+|—10.8 |-6.9 | —.002 | 4.114 | 1.9 | 3.08 |] F°%? ~~~ nie ase ete +.051 |— 8.3 |—5.4 | +. 002 | +. 098 | 1.82 | 3.10 igen +. 037 |— 2.1 |—1.0 | —.001 | +. 039 | 1.18 | 2.89 Extreme range of abnormal waves: ++. 025 | 2.5 |4+1.4 | +.010 | +. 004 | 0.62 | 2.71 TE EYE EE ATO ane oO » Bol g. » M.), LOix, +.012*|4+ 4.3 |41.9 | 4-.021 | —.001 | 0.59 | 2.45 |) +.005 |4+ 5.7 |+2.5 | +. 026 | —.011 | 0.71 | 2.38 Be eee F. 0014/4. 6.4 |4-3, 1. | 1-023 || —=, 024) 1,00 12762) nastrn chee ee ee —.005 |-+ 7.5 |44.2 | +.017 | —.050 | 0.65 | 2.32 || T° 87°-6, at 6 p.m., on Aug. 17, 1872. -| —. 009 |410.2 |+5.8 | +.017 | —.091 | 0.59 | 1.71 HET ns EUEEEAD WET AND R LB THERM ERS. —.011 |4+12.2 |4+6.9 | -+-.019 | —.115 | 0.47 | 1.29 —.011 |+-13. 4 |4+-7.3 | +.025 | —. 123 | 0.47 | 1.18 a\ala/.e/86 zu |S —018 [4+15.4i}48.9] +.019/—173}0.47/ 1.29] 5 | g | & |S |e] & ae —. 027 [413.8 }-9.0 | +.001]—.184/029/171] 2 | § | A IElal a lee —. 032 |+12.1 |4-9.2 | —.022 | —.200 | 0.29 | 2.06 Rea (ee (Eee 69.5} 17.8] .235| .343/ 1.00/26 | Amal apm) eno [548 |s2.11.197| .256 * Maxima. t Minima. HOURLY OBSERVATIONS. 539 SUMMARY OF HOURLY OBSERVATIONS AT LABRAN, COLORADO, FROM AUGUST 12 TO AUGUST 27, 1873. 3 eae Be H. ur. 52 Ho oo 3 =3) “ 0 Sbiiceear —. 031 SivpmM)eece- —. 031 Olen etna —. 029 10 a.m -..-.| —, 023 DL ey oa —. 012 12M ecees +. 001 1lp.m..... +. 017 2p.m....-| +. 033 3p.m..-..| +. 032 4p.m...-. +. 034t: 5p.m....-| +. 030 6 p.m .-...| +. 026 TEED Sees +. 014 8p.m-....| —. 002 9 p.m .....| —. 009 LOFpsmi-. == —.011 11 p.m -....| —.012* 12 p.m -..-..| —. 009 la.m.....| —.007 2a,m -.....| —.007t Grandmeans} 24, 944 Latitude, 38° 23’. Altitude above sca-level, 5,217.8 feet. (P18, fig. 10; Pl. 12, fig. 32; Pl. 15, fig. 50; Pl. 18, fig. 69; Pl.2U, fig. 90.] — 6. + 6. SLT. Ett +12. SLi +14, +14.8 +15.3 ere nwowrenwnoemocencd awn +16. 5t/4+ 8 11.2 |-+ 7. 74.7 = g ie 2 A = Sax ps} F | ou Be) da =) = a3 3 2 3 s = ae = eine er eS S215 ° “ + 3.4 |—.040 |—. 056 | 1.75 | 3.63 + 0.7 |—. 080 |+.012 | 2.19 | 3.25 — 3,1 |—. 073 |+. 098 | 2.06 | 3.06 — 7.0 |—. 070 |+.166 | 1.62 | 3.13 —10.6 |—. 065 |+. 218 | 1.19 | 3.69 —12. 1 |—. 043 |+.239 | 1.06 | 4.50 —11.0 |—. 033 |-+-.227] .94 | 5.19 — 9.8 |—. 082 |+.212 | 1.44 | 5.75 — 8.3 |—.014 |+.195 | 1.50 | 6.63 — 6.0 |—. 008 |+.161 | 1.7 5.94 — 3.7 |—. 004 |+. 120] 1.75 | 5.56 — 0.5 |+.013 |+.056 | 1.31 | 5.81 + 2.6 |+. 027 |—. 020} 1.50 | 6.81 + 2.5 |+.048 |—. 012} 1.19 | 5.44 + 4.8 |+.042 |—.085} .87 | 4.31 + 6.2 |+.032 |—. 136 | 1.62 | 4.63 + 6,2 |-+.085 |—. 135 | 1.12 | 4.06 + 6.7 |+.036 |—. 155 | 1.19 | 3.75 + 7.1 |4+.0388 |—.170} .87 | 3.31 + 7.6 |+.040 |—. 188 | 0.87 | 3.13 + 7.5 |4.052 |—. 185 | 0.62 | 2.56 + 7.9 |+.050 |—. 202 | 0.81 | 2.75 3 1+ 054 |—.220] .94 | 3.06 5 |—. 001 |—. 197 | 1.00 | 3.44 13.0 | .408} .£03} 1.30} 4.31 REMARKS. PROPORTION OF CLEAR AND CLOUDED SKY. Per ct (CHE ceseacedtoaer 6ecceccrcoaeser een 57.0 Minrbugt sacs cscs seo ieee een eee = 2.3 Cumulus. gE Cirrus .-.- 0.5 Stra us ..... 5.4 Cirro-cumulu 1.1 Ci r>-stratus.. 7.6 Cumulo-stratus ........--.....------ 24.1 Nimbus-cumulo-stratus......--..--. 0.8 Total! 222 2tac aces -jnaeene~ cess 100 0 WINDS. Calms.| N. Ss. rE. | W. Percent... | 16.5]0.6 | 3.3 |7.0 | 2.0 WONG fee cael ee 1.00 | 1.03 | 1.43} 1.29 N.E.| N.W.| SE |S. W. Per cent... | 20.3 41.5 4.4 4.4 Force ..... 1.33 1.74 1.44 1.40 BAROMETER. Extreme range of abnormal waves: From 25.137 incheson Ang. 15 (11a. m.). 1873, To 24.759 inches on Aug. 22 (5 p. m.), 1873. THERMOMETER. Extreme range cf diurnal temperature: From 110°.6, at 12 m., on Aug. 27, 1873, To 5~°.2, at 4 a. m., on Aug. 27, 1873. GREATEST DIFFERENCE BETWEEN WET AND DRY BULB THERMOMETERS. Paulas [eset canes ; FS &/a|/e]2/s4 2 2 Se || ed) Ce (ae tS 3 o i) = . == A HS l/alEFlalsa lsat 1973. o | o | o |} w * _ ou a Aug. 14/1 p.m. a a 36.7 |*. 36 * Approximate. a ia Oe es Le Al ls Ne el ee * Maxima. t Minima. 540 BAROMETRIC HYPSOMETRY \ SUMMARY OF HOURLY OBSERVATIONS AT COTTONWOOD SPRINGS, NEVADA, FROM AUGUST 31 TO SEPTEMBER 14, 1871. Latitude, 36° 03’. Altitude above sea-level, 3,449 feet. (Pl. 8, fig. 11; Pl. 12, fig.36; Pl. 15, fig.54; Pl. 18, fig. 68; Pl. 21, fig. $8.] a Si ae Hour. 12.0 Eo ee 3 & “ apae Meee —. 027 8 a.m .....| —.033* 9 a.m --..--| —. 030 10 a.m -....| —. 024 lla.m..... —. 022 12)myee === —.013 tepameeee= +. 006 2p.m--...| +. 021 3p.m...-.| +.036 4p.m..... +. 045+ 5p.m.....| +.045 6 p.m ....-| +. 034 7 p.m.....| +. 028 8p.m-.-..-.| +.016 9p.m...-.| +. 008 10 p.m .....| —. 005 11 p.m--....| —.014 12 p.m -....| —.018* la.m ...--| —.015 4a.m.-....| +.004 5a.m-...-.| —.009 Giacimy=.-=- —.017 ya ee = ese a end fe |ese a |e (eo) 1°} + 3.9 | 44.1 == 98} | JSR = 49 | 25 — 7.9 | —4.9 —11.9 | —6.5 —jP.S || ai —13.3*| —8.9 —13.2 | —8.7 —13.2 | —8.4 —11.4 | —7.1 —10.0 | —5.7 — 3.5|—1.8 + 0.8} +0.8 + 2.9 | 41.0 + 3.9 | +2.0 + 5.9 | +3.3 + 7.3 | +4.0 + 9.3 | 45.3 + 9.6 | +5.6 +10.7 | +6.3 Force of vapor. +11.5 | +6.6 } +. 019 +12.3 | +7.1 +. 020 +14.44] +8.5 | +.019 +11.0 | +8.0 Grandmeans| 26. 468 7.9 22.8 —. 009 - 241 Relative bumid- ity (per M.). mean force (10 max.). Winds, Anronww o vu worowowocrwono oe newneou Clouds, amount (10 max.), 0.0 1.0 Cirro-cumulus - 2 (Giro stratnaee eae =F Cumulo-stratus -..........---------- 0. REMARKS. PROPORTION OF CLEAR AND CLOUDED SKY. Per ct. (QRS eee ceenscessscesscrosedeceoscas 90.6 Nimbus. -- 2.9 Cumulus 3.8 Cirrus 0.6 Stratus 0.4 0.9 3 Calms.| N. S. | E. | W. Per cent -- 17.2} 5.0 1.7 | 4.4] 10.3 TOTES) ae ee |) means 14/ 13/1.8] 1.4 N.E. | N. W. S.E | S. W. Percent... | 11.7 23.9 22.8 3.0 Force .-.--- 1.5 1.1 1.5 1.4 BAROMETER. Extreme range of abnoimal waves: From 26.676 inches on Sept. 9 (9 a. m.), 1871, To 26.243 inches on Sept. 7 (7 p. m.), 1871. THERMOMETER. Extreme range of diurnal temperature: From 94°.0, at 4 p. m., on Sept. 12, 1871, To 53°.0, at 5 a.m., on Sept. 12, 1871. GREATEST DIFFERENCE BETWEEN WET AND DRY BULB THERMOMETERS = ]/4)4 a | 2/2l2|elfs 2 2] P| Sle |e | es is) fea) A|IE/ala a= 1871. ° ° °o au” Sept. 1 |2 p.m.} 99.2 Seelicos -208) .118 “ Maxima. t Minima. HOURLY OBSERVATIONS. 541 SUMMARY OF HOURLY OBSERVATIONS AT BEAVER, UTAH, FROM AUGUST 30 TO SEP- TEMBER 7, 1872. Latitude, 33° 16’. Altitude above sea-level, 5,915.6 feet. Pl. 8, fig. 12; Pl. 12, fig. 33; PL. 15, fig. 51; Pl. 18, fig. 70; Pl. 21, fig. 89.] [ .—) c—) ae | one a s 23 a 3 z 4 PROPORTION OF CLEAR AND CLOUDED SKY. Hor. | $8 | & [#23] ¢ | 28] S] 88 : Ss TERS} | Gres es es | 2 [evg| 2 | se | es | ee S esg on Sy |S a Be ise || eesll ee Bald Cirro-cumulus ..-........---. acne . “ fo} fe) “ Cirro-stratus LAsnconsdese Soeeemeeesoc 0. 28 eres es |= 1026) | ae alata «| —=..09-4 1) =-,409) | 0866, 3.66, a 11.50 8a.m.... | —.028 | — 0.4 | +2.0 |—. 038 |—. 036 | 0.65 | 3.33 ee Muse 9a.m.....| —.034*] — 3.8 | —0.5 |—. 029 |+. 038 | 1.22 | 3.44 XESS 10/a.m - ----| —.033 | — 7.2 | —3.0 |—. C22 |-+4.098 | 1.33 | 4.11 alee been eee 11 a.m ---..| —.021 | — 8.3 | —3.8 |—. 021 |-++.113 || 1.55 | 5.44 | eae Uy a Ssaece —.006 | —10.1 | —5.5 |—. 012 |+.148 | 1.55 | 4.22 |] Percent -. | 39.35 | 1.39 | 15.28] 0.46] 0 Force .-... |. ---- | 2C0 | 215/100] 0 1p.m-... | +.007 | —10.6 | —6.1 |—. 003 |+. 164 | 1.88 | 3.88 2 p.m .-.-.| ++. 022 | —11,6*] —6.6 |—. 001 |+.170 | 1.88 | 4.22 5 || Soe, lee 3 pam 2---||-,033 | 10.8 | —6:7 |-2. 001 |4-. 173 | 2,22 || 4.33 is 4p me = =.4- +. 037 | —10.6 | —6.4 |—. 002 |+. 167 | 2.00 | 3.77 oe cent... | 833] 275] 19.27] 12.84 Ones c - 95 ape Giese 042 == SoG al 5.1 == OO ee da | 77 | aT aw lMiabes ee yi |b ae pricy acon |, 5 HOS ) Gipsme 222-042 5.2 | —2.8 |—. 002 |+. 099 1.44 3. 0 a eed apa’ = +. 030 | — 0.7 | —0.1] .000 |+. 036 | 0.83 | 3.33 Extreme range of abnormal waves: 8p.m-.....| +.013 | + 1.1 | +0.5 |+.009 |+-. 022 | 0.77 | 1.66 || From 24.044 inches on =e: t.3(3 p. m.), 1872, To 24.367inches on Sept. 7(10a.m.), 1872. 9p.m....- +. 008 | + 3.4 | +2.2 |+. 003 |—. 031 | 0.88 | 1.22 10 p.m.....| +.002 | + 5.2 | +9.9 4.010 |—. 051 | 0.55 | 1.22 5 eee 11 p.m ....| —.002 | + 6.5 | +3.7 |4-.009 |—.079 | 0.77 | 1.11 From 3993, at Sat, onSepe Tiga DTT cee col] SI || SE GS) eh hye ts ss || sy) || ses} || RO SE psec mts ya score la.m-~....| —.010*} + 8.6 | +4.5 |4.017 |—. 105 | 0.83 | 1.55 || Greatest DirrerNce BETWEEY WET AND DRY BULB THERMOMETERS. 2a.m.....| —.010 | + 9.3 | +-4.5 |+. 024 |—. 102 | 0,66 | 1.44 3a.m .....| —.008 | +10.5 | +5.0 |-+.027 |—.120 | 0.77 | 1.66 = a 4 2 | Be o S = 4a.m.....| —.008{} +10.9 | +5.3 |-++. 026 |—. 133 | 0.55 | 2.00 3 g S Es 2 = 2 ~ sz 5 - Eo 5a,m.....| —.018 | +11.6+] +5.6 |+. 027 |-.145 | 0.77] 3.16} & a |aAleElalslise Ga.m ..-.| —.022 | + 9.8 | -+-5.2 I+. 017 |—. 133 | 0.77 | 2.99 Grandmeane| 24.249 | 61.7] 11.3| .260] .497] 1.1 | 29 Ilsopeslop.m| 725 |51.1/264|. 186] 197 * Maxima. t Minima. 542 BAROMETRIC HYPSOMETRY. — SUMMARY OF HOURLY OBSERVATIONS AT TRINIDAD, COLORADO, FROM SEPTEMBER 4 TO SEPTEMBER 19, 1873. Latitude, 37° 10. Altitude above sea-level, 5,989.9 feet. [P1.9, fig. 13; Pl. 13, fig. 37; Pl. 16, fig.55; Pl. 19, fig. 75; PL. 22, fig. 92.] +2 fae algae Hour. 39 &, Bee Be! Teer |rets “ul fo} fe} EOSIN a caac —.031*) + 5.1 J+ 3.1 8 a.m ..... —. 027 | — 2.2 |4 0.3 Diaame eae —.021 | — 7.5 |— 2.7 10 a.m .-...| —.009 | —12.8 |— 5.7 11 a.m .....| —.002 | —14.7 |— 7.7 1 2imieeesece +.010 | —16. 6*|— 9.3 1pameeeee +. 023 | —16.5 |— &8 2)peMie a= =|) 2036) | —— 14s 7a, 3 Dee +. 041+} —12.1 |— 6.7 4 pomee-e- +. 039 | —11.2 |— 6.6 SENN coes +. 038 | ~ 6.9 |— 4.1 6ipsmeree= +.029 | — 1.0 |4+ 0.1 dapat ses +.008 | + 1.9 |4+ 1.5 Sipsmeenee —.008 | + 4.5 J+ 2.7 OM ease —.016 | + 6.6 |4+ 3.7 10 p.m .....) —.016*) + 7.5 |4+ 3.5 11 p.m ._...} —.016 | + 8.1 |+ 3.7 12 p.m -.....} —.012 | + 9.0 |4 4.4 la.m --....| —.006 | + 9.9 |4+ 4.8 IRR Rese —. 004+) +11.4 |4 5.4 3a.m-.....| —.006 | +12.9 |4+ 6.1 4a.m ..... —.008 | +14.0 |+ 6.4 BERN aeoae —.017 | +15. 71/+ 7.2 Grasmy-eeee —. 026 412.5 |4+ 6.2 Grand means) 24. 256 ie) 3} 11.7 ity (per M.). mea (10 max.). Force of vapor. force (10 max Relative humid- Winds, | Clouds, amount @m © DO OOO Mo oo pS SSS oS Seep ay wow FPR PRD SPF PY TSA TWA AAINBWAHAHNWAHA OS * Maxima. REMARKS. PROPORTION OF CLEAR AND CLOUDED SKY. Per ct. SO arL 1.8 3.6 0.4 Stratus .-...-... -- 152 Cirro-cumulus ........-.------------ 1.1 Cirro-stratus------ ------------------ 8.1 Cumulo-stratus -.......-.------..--- 14.7 Total eee eee ese Sao) 20030) WINDS. Calms.} N. Ss. E. | W Per cent.-.. 23! |) 3.9) 1) 2 2.6] 7.3 LOO) Sosec||S40cse Thah}} TE bee || Tire N.E.| N.W.| SE. |S. W Per cent... | 16.7 4.7 7.0 53. 4 Force ..--- 1.7 1.1 1.6 23 BAROMETER. Extreme renge of abnormal waves: From 24.542 inches on Sept. 7( 8 a. m.), 1873, To 240623 inches on Sept. 17 (4p. m.), 1873. THERMOMETER. Extreme range of diurnal temperature: From 949.0, at 12 m., on Sept. 16, 1873, To 48°.2,at5 a. m., on Sept. 16, 1873. GREATEST DIFFERENCE RETWEEN WET AND DRY BULB THERMOMETERS. Dry (Fah.). Wet (Fah.). Diff. (Fah ). I’. vapor. Humidity (per M.) Date. Hour. °o “ 1873. Sept. 16|2 p. m.| 93.2 | 62.8]30.4/.291] .187 fo} ° t Minima. GENERAL REMARKS UPON METEOROLOGICAL PHENOMENA OBSERVED. Thunder and lightning, September 5,2 p.m. to 1 a.m.; same, on 6th,5 p.m.; same, 10th,5 to 8p.m.; same, on 13th, 1 to 9 p.m. Rain, 2.10 to 2.55 p. m., September 5; same, 12 to 1.50 a. m., September 6; same, 2.45 to 5.20 p. m., Sep- tember 6; same, 6.25 to 8.15 p.m., 6th; same (slight),10 p. m., 6th, to 3.40 a.,m.,7th; same, 5.40 p,m., 10th; same,7 to 8 p. m., Septemker 13. Large circle around moon, 11 p.m., September 7; very plain and increasing in diameter at 3 a, m., Sep- tember 8; clearing up from the east at 4 a. m., September 8. Heavy dew at 4 a. m., September 9. Rainbow in east, 5 p. m., September 11. Sudden and violent squall of wind at 10.25 a, m., September 17, lasting 10 minutes. HOURLY OBSERVATIONS. 543 SUMMARY OF HOURLY OBSERVATIONS AT CHEYENNE, WYOMING, FROM SEPTEMBER 15 TO OCTOBER 21, 1572. Latitude, 41° 08’. Altitude above sea-level, 6,041 feet. (Pl. 9, fig. 14; PI. 13, fig. 38; Pl. 16, fig. 56; PI. 19, fiz. 73; Pl. 2’, fig. 93.] 3 3 g fel 2 | ees Fs REMARKS 2 ce WES 2 Sie om | se care F y = aS gs lis a nD eS Soe Ss Ef! - 3 | 54 || PRorortion oF cLEaR AND CLOUDED SKY. o> & leer > be olas 3 zs 2s - iss5 6 > & we oe = |! clear 3 ara o- S Sa 8 EE | ZS | Bo || eae veneer ee s See ree ece| oop es ele e eS lors a a8 = = see 2 ona es | Cirrus ... 4.2 al a = m al ie o Stratus .--. 0.0 Cirro-cunulus ..-.--. wee ee “ fo) ° u“ Cirro-stratus 22 os osce oscar ce seee nee 2.1 Copa eae = AO1Ay jeter ara} 03 || tid! O86,| 26 )| = Stasi: =e0220\ Ode |-eteaal— 013 |=—016)!) 0,91! 2.0 set ects ae aan 0 Oren —. 029*| — 8.8 |—3.0 | —.027 | +.097] 1.1] 2.4 Nos LOVaSmieeee —.026 | —13.4 |—5.2 | —. 037 | +.140 UN |) REP Calms.| n. | s. | &. | ow. MMa.im) se —.018 | —15.7 |—6.4 | —. 042 | +.161 1.1] 2.6 UO Seeecse —. 002 | —17.8 |—7.2 | —.051 | +.172 | 1.2) 2.9 $n Gaui: 43.9] 8.9] 0.4 oe 71 rorcels 2222 ic. 15] 1.0|10)15 A panties e-| 2-104 |)—19s2 |= b°0 2.050) e-1e8 | 45.3.0 |) : Or = SC Eo) pd — 2p.m...--| +. 025 19.8 8.4 -054 | +.190 Hee! |) Beal NE | x.ww. sg. |s.w 3p.m.....| +.034 | —19.4 |—8.3 | —.051 | +. 189 1.4 | 3.6 Apomire--- +. 036+| —17.4 |—8.0 | —.035 | +.190 | 1.3 | 3.9 || Percent .. 8.7 12.7 3.7 7.9 5 p.m ...-- PEK OS0) 1s ays Z| OG ISS OM SeB ioe Lore] FO Pt eS Gipymeee ee +. 026 | — 2.9 |—0.9 | —.004 | +.057 | 0.7 | 3.5 ony 9 ) 2) CAE oct siege te ON atglere a tge || teak 3028), 3.2 Extreme range of abnormal waves : Sipamie === .0C + 5.1 |+2.3 | +.017 | —.030 | 0.5 | 2.5 || From 23.761 inches on Sept. 23 (3 p. m.), 1872, 5 To 24.41liuckeson Oct. 9 (8 p.m.), 1872. 9p.m.....| —.008 | + 7.9 |-+3.4 | +.022 | —.068] 0.5 | 2.5 THERMOMETER. = % 2 = 5 5 LE ie diesce: eee fas od eae | tas oes 2097 | 0.5) 2.5 Extreme range of diurnal temperature: 11 p.m-....| —.014 | 411.6 |+4.9 | +.029 | —.129 | 0.5 | 2.5 || From 20°.0 at 6a.m., on Oct. 9, 1872, To 76°.0, at 2p.m., on Oct. 9, 1872. Nps nee —.007 | +13.0 |+5.3 | +.033 | —.145 | 0.6 | 1.9 Rate ee NONI eh eeesee lect O35ih = A540 Oem 17d et oe oe ie Q2a.m.....| +.002 | +14.5 |+5.8 | +.038 | —.162] 0.5/1.5 =] eae c Sak Ss +.003 | +15.3 |+6.0 | +.040 | —.163] 0.4 | 1.6 2 /2/2/8|s ata eee SAO D feel 5018 |-168 0p et 039) || ==4 70) | 0 4 | 0G | g a |S z a | & | Bs asm eee O07 | iseat eG! 2) || 347088] 163.1) (0250/6 |_| = |e sal el he -----| —.017 3. 3. . 037 | — 5 1872. ° o}ofu ee ee ne eet fad es ee fatcaa\ere Sept. 19| 12m.| 85.0 |58.0]27.0].251| . 208 9 Grandmears 24.101] 51.1] 9.9] .182] .502/ 0.8/2.5 [Oct 1s]4hm| ons |salane|. 139) v1e0 * Maxima. t Minima. 544 BAROMETRIC HYPSOMETRY.. SUMMARY OF HOURLY OBSERVATIONS AT PIOCHE, NEVADA, FROM SEPTEMBER 27 TO OCTOBER 14, 1872. Latitude, 379 55’. Altitude above sea-level, 5,942.3 feet. [PL 9, fig.15; Pl. 13, fig. 41; Pl. 16, fig.59; PL. 19, fig. 73; Pl 22, fiz. 91.] 3 zs 25 S eae |e ay REMARKS. 58 2 Pra = Ea BE 2% || proportion oF CLEAR AND CLOUDED SKY. Hour. os Bisse S 2: = =a Per ct. Bo a pee 2 ZS 2 a|Se || Crear... 86.9 as | age = 22 |e} 2} Nimbus 20 a SAS hee le elon ret Stratus® 2230S = 0.0 " ° ot Cae cemumeerugn ee me So 7 a.m ..---| —. 022 | + 7.1 |+ 4.2 | +.005 | —. 057 | 1.5 | 1.2 |] Cumnlo-stratus .................._.. 0.2 Same 3025) |) 15 SES} |S Shr Sail |) i) |] 28 || TERS Total fees tees al 100. 00 9 a.m) - ===-|-—028"| — 1.7 |4- 0.3 | —.017 | —.010 |'0:9 | 16 ens 10 a.m -....| —.025 | — 6.4 |— 2.3 | —.025 | +. 021 | 0.6 | 1.6 11 a.m .....| —.020 | — 87 |— 3.5 | —.030 | +.032 | 0.9 | 1.8 Calms| N.| s. | E ibe 12a.m...-.| —.009 | —10.7 |— 5.3 | —.025 | +. 053 | 1.0 | 2.3 | 1 p.m,..--.| 45,004 | —11-35|— 5,6 | —,027:|42054 |10:9.) ie) lnecer ns le eee le Sees 2p.m..-..| +.019 | —13.2 |— 6.8 | —.028 | +.065 | 1.1 | 2.8 3 p.m-...-.| +.025 | —12.1 |— 6.3 | --.025 | +.062] 1.2 | 2.1 N.E.| Nw.| SE sw 4p.m...--| +.029 | —10.9 |— 5.8 | —.021 | +.059 | 1.2 | 2.3 5p.m.....| +.0294 — 4.5 |— 2.8] —.002| 4.037] 1.1] 2.3 |[Bercent--| S68] 446] 167) 44 Gipsitlecsse +. 026 | — 2.5 |— 1.9} 4.003 | +.030 | 1.2 | 2.2 ! 7p.m-...-.| +.019 | — 0.5 |— 1.0 | +. 007 | +.021 | 1-2 | 2.0 BAROMETER. 8p.m .----| +.011 | + 0.7 |— 0.8] +.014 | +.014 | 1.1] 1.7 Extreme range of abnormal waves: Op.m.....| +.003| + 2.51 0.3] 4.015 | 4.010 | 1.2] 1.5 [re hee) ene eee oe (mm), 1ST, 10 p.m --.--] —.003 | + 3.3 |4 1.3] +.010 |] —.008 | 0.9 | 1.4 SHER MOWEEE. 11 p.m --.-.-| —. 006*| + 5.4 |+ 2.3 | +.014 | —.019 | 0.9 | 0.8 Extreme range of diurnal temperature: 12 pom --.-.] =2006)| 4-7-4. 3-5'| +f. 016) —.0361] 1.1 | 0.8 |] pe eae § Seon Ger ae faye itis —.003 | + 8.0 |+ 3.9] +.015 | —.043 | 1.2 | 0.6 GREATEST DIFFERENCE BETWEEN WET AND 2a.m...-.| —.002 | + 9.0 |4 4.5 | +.016 | —.052 | 1.5 | 0.3 DRY BULB THERMOMETERS. 3a.m.....| +.002 | + 9.4 |+ 4.5 | +.020 | —.049] 1.5 | 0.5 ae Aas rne: Se —. 001+] + 9.9 [4+ 4.4] 4.024 | —.043 | 1.3 | 0.5 212/2\|8 23 5a.m.....| —.005 | +10.2t}+ 4.2 | +.029|—.036] 1.4/0.6] Sl ee ie | & ES Gace —.021} +9.3 4 4.7] 4.016 | —.055 | 1.4/1.0] 8 | & | 8 |F 1a |e je Grand means| 24.233] 62.7] 19.5] .145| .259| 1.2] 1.5 |] 928, Reales tela oll ape Wires | a a la ee ee * Maxima. t Minima. GENERAL REMARKS UPON METEOROLOGICAL PHENOMENA OBSERVED. Rain, with thunder and lightning, at 9 p.m., September 26; same, 6.15, p. m., October 1; same, from 6 to 7 p.m., October 1; ceased at 12.30 p. m.; in all, ”.5. Meteors, numerous. HOURLY OBSERVATIONS. 545 SUMMARY OF HOURLY OBSERVATIONS AT OGDEN, UTAH, FROM SEPTEMBER 26 TO OCTO- Latitude, 41° 13’. BER 3, 1873. Altitude above sea-level, 4,374 feet. [Pl.9, fig. 16; Pl. 13, fig. 39; Pl.16, fig.57; Pl.19, fig. 77; Pl. 22, fig. 96.] 3 x Bs 8 ae aa|e. REMARKS. acl 4a ate (3 2 Ba | 5 z 4 PROPORTION OF CLEAR AND CLOUDED SKY. ge Be |H#eo a o|&& Hour. Bo sh See o ae Se ‘ Es a g 2 a |r o | ceo ve ae g 35 Es E ae a go Bee pe a See (a Ea es Br | Chal Seeenie ee ss ee gee 2.41 Cirro-cnmulus)-2s--.--seee -=24==>= == 1. 69 au“ fe) ° “ @irro-stratusge-sese ase =o eee eee 4. 28 Wana. sacs BeSs OBI p= Tate ae |e ee end Te. Gr = 048) |/'0, BY. || 286: | Com ee ere oa Sees cet ace con ae Biarmisess- —.036 | + 1.7 | 41.1 |+.070] .000 | 1.00 | 2.43 DOHA Secoenepeocesucecsacesce AUB Slane —.040 | — 6.1 | —1.6 |—. 021 |4. 050 | 1.43 | 2.29 WINDS. 1Olaameeeee —.042*] —11.8 | —3.8 |—. 049 |4.087 | 1.14 | 1.71 Calms.| N. Ss. E. | W. iil Bm Seoe- —. 034 | —16.1 | —6.1 |—. 051 |4. 122 | 1.00 | 1.28 iin Seccese =, 023) | —1910) | —6..8 |—. 072. |. 126)| 1.00)| 0.86 || pancent- | 465) 43 || v9 \|s0 las pps see (01D) |} 20,2) |] 5.21 | eS |e || RAL |] Ds) || oes Hie || ED |code 2p.m..... +. 001 | —21.0 | —8.4 |—. 066 |+. 152 | 0.86 | 1.14 3p.m....- +. 01 | —21.9*) —9.1 |—. 058 |+. 163 | 1.00 | 0.71 a aes Aner eee +. 025 | —20.6 | —9.0 |—. 053 |4-.156 | 1.00] 1.00 ||... ont. |an3 | ens 5 p.m..... +. 031 | —15.0 | —6.6 |—. 031 |4+.136 | 0.86 | 1.28 |] Force .----- Lu} iu 6ipsmeeee +. 032+| — 6.8 | —3.0 |—.008 |4. 087 | 0.57 | 0.86 7p.m.--.- +. 031 | + 4.2] +2.6 |+.009 |—.040 | 0.71 | 0.48 ELMO SEINE: y E: ge of ab al A Sp.m.....| +.028 | + 7.1] +4.2]+. 010 |—095 | 1.00 | 1.28 } promttetTmuhes on Sept a Gao). 180, Oypame esse +.020 | + 8.7] +4.5 4.017 |-.099 | 1.00 | 1.86 || To 25.169 inches on Sept. 26(7 p. m.),1873. 10 p.m-.... +.015 | +10.1 | +4.6 |+.020 |—. 095 | 0.86 | 1.86 ‘THERMOMETER. li p.m..... +. 014 | + 9.7 | +4.6 |+. 024 |—.098 | 1.00 | 1.17 Extreme range of diurnal temperature: 12p.m....-| +.005| +11.0 | +4.9 |+. 029 |-. 104 | 0.83 | 0.67 |] Brom So0-8 at 3 8 on eee 30 Iara lam...-.| +.005 | +11.9 | +4.9 |+.034 |—. 108 | 0.83 | 0. 67 GREATEST DIFFERENCE BETWEEN WET AND 22.M ....- -+. 003 | +13.1 | +5.4 |+. 038 |—. 079 | 1.00 | 0.43 DRY BULB THERMOMETERS. BPs iile cose +.001 | 4-14.4 | +5. 0 |+.052 |—. 084 | 1.00 | 1.00 =e peste <5 Aiasmiso--: +.005 | +16.2 | +5.8 [4.055 |—. 110 | 0.86 | 1.14 lé2lélélélzs 5a.m.....| +.001 | +168 | +6.0 |+.058 |—.118 | 0.86] 1.23 ]} B | p 3 a | Bs Ga.m.....| —.008 | +17.2t] +6.7 |4.050 |-. 153 | 0.71 | 2.14) EATS | | ess | I IR | Grandmeans| 25.525 | 53.6 | 11.9| .177| .436 | 0.95 | 1.32 || ops }3p m| 95.3 |59,7|25.6|.277] 227 * Maxima. +t Minima. 35 AST 546 BAROMETRIC HYPSOMETRY. SUMMARY OF HOURLY OBSERVATIONS AT TRUXTON SPRINGS, ARIZONA, FROM OCTOBER 23 TO OCTOBER 25, 1871. Latitude 35° 25’. Altitude above sea-level, 3,885 feet. [Pl. 9, fig. 17.] 5 Pu . ‘ a|+ 2 = |e3 Bee ie Gla REMARKS. Hegia) egura|feeea | ora (eee alle 2 Sec = AS s Soe e S & | 84 || PRororrion oF CLEAR AND CLOUDED SKY. i =- oo a 3 Hour. $2 — sas 1 ee {S| 5 Ho S mate ° 5S Ps i 2” Biiistaic te Se |ae|5CIN a | & ja*| & | 8 belo |eeue : To aL | a a | een | |Dobraluis hee eee see eee eaten see " ° ° Wt Cirro-cumulus ..--...--------------- Cirro-stratus.-.--...---.------------ 7a.m...-.| —.029*| + 2.5 |4+ 2.2 | —.005 | —.056 | 1.0 | 0.5 || Cumulo-stratus --.. 8a.m-...-.| —.027 | — 5.5 |+ 2.5 | —.1388 | —.090 | 0.5 | 1.0 Mn tallsseen aren ce see eee 9 a.m .-...| —.023 | —10.0 |— 1.0 | —.113 | +.061 | 6.5 | 0.5 10 a.m --| —.019 | —16.6 |— 5.6 | —.099 | +.205 | 0.5 | 0.0 Jla.m...--| —.013 | —17.1 |— 7.6 | —.056 | +. 261 | 1.0 | 0.0 Calms. TPMT se5Sa0 -+.012 | —17.7 |— 9.0 | —.031 | +.296] 1.0] 1.5 9. pam .|\ 4038 || 1807 19.3) “040/14 3001) 460 NIOn| meee ee ee Py sp eee +. 036+} —19.1*|— 8.3 | —.070 | +.273 | 1.0 | 0.0 3p.m-...-.| +.030 | —15.7 |— 7.9 | —. 027 | 4.273 | 1.5 | 0.0 N.E. | N.W.| S.E. |S. W. 4p.m.....| +.024 | — 4.6 |— 2.3 | +. 006 | 4-.130 | 1.5 | 0.0 5 p.m__...| +. 028 |— 1.6 | 0.2 |||. 012 | +. 033/|/2101| 010 | Fercs | co) ae | aa | as 6p.m.-.-.| +.019 | — 0.6 |+ 0.6 | —.009 | +.017 | 0.0 | 0.0 7p.m.-.---| +. 020 | + 0.9 |+ 2.5 | —.036 | —.077 | 0.0 | 0.0 BAROMETER. 8p.m---.--} +.010 | + 2.0 |+ 4.0 | —.060 | —.161 | 0.0 | 0.0 Extreme of abnormal waves: Ei | From 26.102 inches on Oct. 23 (10 p. m.), 187), 9p.m-.-.-.| —.002 | + 7.0 |+ 3.8] +.015 | —-.140 | 0.5 | 0.0 |)'To 25.986 inches on Oct. 24 (2 p.m ), 1871. 10 p.m ----.] —.010*} + 9.4 |4+ 4.4 | +.029 | —.175 | 0.5 | 0.0 THERMOMETER. 11 p.m -----]| —.009 | 410.2 |+ 4.8] +. 031 | —.201 | 0.5 | 0.0 Extreme range of diurnal temperature: Q o 2 9. Q7 12 pom A) S008] STAD ial} 455) 1050) at 77 TO) KONO ener yer eee ee egret Ja.m.....| —.010 | +13.7 |+ 3.8] +.091 | —.126 |} 0.5 | 0.0 | GREATEST DIFFERENCE BETWEEN WET AND Qa.m-..-.| —.006t} +13.5 |+ 4.5 | +.074 | —.176 | 1.0 | 0.0 |, DRY BULB TERMOMETERS. Ew ts —,008 | 413.5 |4+ 3.5 | +.095 | —.106 | 1.5 | 0.0 == ; 4am..... —.007 | 14.3 |+ 3.7] +.099 | —118] 1.0) 0.0} 2 3 Sg 2 8 Es Bia eee —.014 | 114.4 |4 4.2 | +.090 | —.152]1.0]} 00] $ Blelsie| 2 fee G-asam ses |-—= 027 | 14 5414 3.7 | 4401 | 118) 120 | ovo) || ef ae ee de er eh Grand means| 26.059 | 58.9] Ga) © 341 |) S7osl|oe ola") Gir ame co lscelaialesas| son | * Maxima. + Minima. HOURLY OBSERVATIONS. 547 SUMMARY OF HOURLY OBSERVATIONS AT FORT FRED. STEELE, WYOMING, FROM OCTO- BER 30 TO NOVEMBER 27, 1872. - Latitude, 41° 47, Altitude above sea-level, 6,840 feet. [P1.9, fig.18; Pl. 13, fig. 42; Pl. 16, fig. 60; Pl. 19, fig, 76; Pl. 22, fig. 94.] > Pps . oS aA |S 3 a |es S ao | 34/8 REMARKS. zs 5 a . Dias — ne S Pe = Zz 2 & a Ag Bes PROPORTION OF CLEAR AND CLOUDED SKY. Hou. | 38 | & |seel ¥ ee 6 | a8 go . i | 55 Be CS | ele: ||| Oates cosececescrmecesecinescen ene 5 or = ass 5 ee | 35 | 2a] Nimbus . = =| Sq = 4S Be - S © Oak S om | 518 Cumulus . a ese iS ios fe ESCoI | Hes Kabra Ve Reet eee meme ae I rae LS ———<— | q— | ———_|———|— || Stratus . 2 Cirro-cumulus -. 22.9 u" ° ° ) Cirro-stratus ... 1.6 7 a.m ...--| —.022 | +4.5 | 41.5 | +.002 | —.071 ] 1.2] 5.1 |} Cumulo-stratus - 2.2 8 a.m -....| —. 024*| +2.3 | +1.0 | +.002 | —.022] 1.4] 5.1 Total .-.---...-------------+--- 100.0 ORs ses 55|) S022) | =.) 0.0 | +.003 | +.036] 1.3] 5.7 WINDS: LOlasmneeeee —.020 | —4.7 | —0.9 | —.010 | —.002] 1.3] 5.4 dij agg, 5) 014 |=, 0) | — 14 | —. OF6)| =. O17 |. 158, [5.9 pean | este) | teal [EAE LE oe gts ae a ae One een HT aes OURS O2d t 5:8 | per canto taet lawl isltoro lao I pim----:| --.017 | —6.6 | —1°5 | —. 021 | —.036 6.0 || Force ..-.--]..-.-.. 15) 10/00) 18 Ps Me eoee +. 034 | —7.3*| —2.2 | —.020 | —. 023 Spon. - SE nOeo ti ==70 102) 21 |, O18) || ont 4p.m...-.| +.035 | —5.0 | —1.2 | —.009 | +. 009 Per cent.--.| 0.10 1, 22 0.0 | 43.40 5 p.m -.-...| +. 026 | —2.6 | —0.4 | —.001 | +. 028 5.3 || Force .....- 0 2.7 0 18 6 p.m .--..]| +.014 | —1.0 | +0.1] +. 002 | +. 023 7 p.m -.-..| +.008 | +0.3 | +0.2 | +.006 | +. 041 4.1 BAROMETER. Spsmr ee. +. 003 | +0.6 | +0.3 | +.006 | +. 036 3.8 Extremo range of abnormal waves: From 24.065 inches on Noy. 12 (9 a. m.), 1872, 3.9 || To 23.156 inches on Nov. 14 (7a. m.), 1872. 10 p.m.....| —.003 | +2.1 | +0.3 | +.012 | +. 061 3.6 THERMOMETER. ii p.m-....| —.004 | +2.8 | +0.5 | +.012 | +. 056 12p.m.....] —.006*} +2.8 | +0.5 | +.012 | +. 056 4.0 Extreme range of diurnal temperature: From —10°.0, at 5a.m., on Nov. 16, 1872, 4.3 ||To 260.4) at 2p. m., on Nov. 16, 1872. Howe nwnnwnrraomdorsow > ~ 2 2 2 1 1 1 1 1 9 p.m .....| —.003 | +1.3 ] +0.3 | +.u00| +.049] 1. 1 1 1 1 1 1 1 1 1 la.m-.....| —.005 | +3.4 | +0.9] +.008] +.006] 1.5] 4.7 GREATEST DIFFERENCE BETWEEN WET AND 2a.m ...-.] —.006t} +3.9 | 41.1] +.006 | —. 016 .2) 5.1 DRY BULB THERMOMETERS. Sam. .-|—.008) 44.4 | 41.1 |)-+. 008 |-—. 010 | “1.34.8 yee = 4a.m .-....| —.012 | 45.5 | 41.3 | +.007] —.030} 1.4| 4.5 ; & 2 é 3 aa Sam.....]— 014} 45.8] +1.4|+.007)—045] 10/43] € | B |p| s}a] 2 | Es Ga.m..... —.017 | +6.7t| 41.9] 000] —.132] 1.2/4.4] & | | 8 | F| a |e [a Grandmeane| 23.572 23.8/ 3.7] .047| .364] 1.5] 4.8 | wor'slap.m 42.8 ]31.0| 11,8|.003| . 388 * Maxima. t Minima. 548 BAROMETRIC HYPSOMETRY. SUMMARY OF HOURLY OBSERVATIONS AT PRESCOTT, ARIZONA, FROM NOVEMBER 1 TO NOVEMBER 8, 1871. Latitude, 34° 33’. Altitude above sea-level, 5,318 feet. (Pl. 10, fig. 19; Pl. 13, fig. 40; PL 16, fig.58; Pl. 19, fig. 74; Pl. 22, fig. 95.] : ee c 1 a+.|+ 3 Be ES 3 aa 3 4 3) REMARKS. I a >: = =) || = =e aS 2 Bet Se $ Eta A g 5 4 || PROPORTION OF CLEAR AND CLOUDED SKY. Hour. oa S 355 ) 2s a = oa = Per ct. ° cS is) BY)... seoscsesoaneassssosotsnacss 82.4 ss Ey EE 3 ee |E8|ze Nimbus 5.9 a 5 sa ey BS SB je |ee2| 8 So eee t tem a8 —___ || Stratus - 0.1 " ° 5 u Cirro-cumulus - 3.3 Cirro-stratus 0.0 7 a.m --...| —.021 | + 4.4 |4+ 1.2 | 4-.019 | --.041 | 3.0 | 0.4 || Cumnio-stratus 0.0 8 a.m --..-.| —.028 | — 6.9 |— 1.8 | —.026 | +.065 | 2.7 | 1.0 TS ee pent On bc 100.0 9a.m.....| —.030*} —11.0 |— 2,9 | —.046 | +.094 | 3.0 | 1.1 eee 10 a.m ..--.| —.023 | —12.7 |— 3.8 | —.047 ) +.122 | 3.0] 1.4 Jl a.m ...-.) —.015 | —14.4 |— 4,7 | —.050 | +.148 | 2.4] 1.6 Calms.}| N. | S. | E. | W. 12im=s <2. = <= +. 020 | —16.1 |— 5.7 | —.051 | +.174 | 3.0] 1.9} — 9 1p.m.....] +-029 | —22.8*|— 8,0 | —.08l | 4.221 |1.9]1.9 [Fore |---| £3] £3|ro| v6 2p.m.-..-| +.041 | —20.9 |— 7.4 | —.071 | +.210 | 3.0 | 1.9 iQ Ss asse +. 041t} —15.7 |— 6.3 | —. 037 | +.206 | 3.0} 1.9 N.E.| N.W. | SE. |S. W 4p.m.....| +.035 | —10.1 |— 2.7 | —.040 | 4.090 | 3.4 | 1.8 SS SS Bipsmysce<|--s019)||— 3:4 |= 1-0!) S08) 2 0810! O48 idea eee eee ee Teme (eae 6 p.m.-.-.--| +.009 | + 0.3 |4+ 2.5 | —.037 | —.153 | 1.5 | 1.0 Pips ieee) SE eOGIN |t=02 Walesa Ata yle—wlaz aie Iles BAROMETER. Sil acscc —.005 | + 5.4 |4+ 2.3 | +.009 ; —.111 | 1.0] 1.3 Extreme range of abnormal waves: From 24.854 inches on Noy. 7 (12 p. m.), 1871, 9p.m.-....| —.010 | + 6.8 |+ 2.4 | +.019 | —.104 | 0.4] 0.8 || To 24.476 inches on Nov. 5 (1 p. m.), 1871. 10 p.m...--| —.013 | + 7.9 |4+ 2.6 | +.026 | —.102 | 0.4 | 0.8 THERMOMETER. 11 p.m-.---. —.015*) + 9.6 | 3.1 | 4.034 | —.110 | 0.5 | 0.8 || Extreme range of diurnal temperature : ° 9 12 p.m ...-.| —.008 | +11.3 |-+ 3.6 | +.041 | —.120 | 0.4 | 0.4 | Rem Soo. abo Pe on No la.m.....| +.003 | +11.4 |+ 3.6 | +.042 | —.117 | 0.2] 0.5 GREATEST DIFFERENCE BETWEEN WET AND 2a.m -.-...| +. 008t} +13.0 |+ 3.7 | +.055 | —.086 | 0.2 | 0.6 DRY BULB THERMOMETERS. 3a.m.....| +.007 | +14.1 |4 3.8 | +. 062 | —.075 | 0:7 | 0.8 === = ; Fells be 4a,m.....| —.011 | +-15.2 |4+ 3.9 | +.068 | —.066 | 1.4 | 0.6 2 3 3 Bales 5a.m-..... —.018 | +16.3%/+ 4.0 | +.073 | —.061 | 2.1 | 0.5 g Ss 3 a | Bal 6 a.m -....| —.022 | 4-13.4 |+ 3.2] +.070 | —.001}21/04_ 8 | # | A |) E |) a |e) Grand means 24.731) 41.8] 5.3| .169| .632] 1.8] 1.1 || you's li p.m.| 91.2 |58.8/o74|.206| . 194 * Maxima. + Minjma HOURLY OBSERVATIONS. 549 SUMMARY OF HOURLY OBSERVATIONS AT GUNNISON, UTAH, FROM NOVEMBER 1 TO DECEMBER 1, 1872. Latitude, 39° 10’. Altitude above sea-level, 5,145 feet. (Pl. 10, fig. 20.) 3 pa 28 8 aA eG e. REMARKS. Ricci a eats S Ee a 3 34 || rororrion oF CLEAR AND CLOUDED SKY. H SF em Shs 5 o|/s§s Per ct our. 3,2 isa : ey Bee Ellie er ct. Be | & lace] 3 | So | oe |S | Nimmo. 2 ES e° | & (ges) 2 | 32 | 22 [Eo | Gems B Pid (esr Ree s nl HA al ma eS etme ay ea caonss 1.0 Cirro-cumnulus 2.4 “ ° ° “ Cirro-stratus 11.4 las mlcce 9323} || 212.9 |. || 22,08 || er || ye) |] aii || Asa eee ese ee Glas meee —, 037 | + 6.4 |42.9 | +.017 | —.046 | 0.7 | 4.3 Total -...---------+-------2+--- 100. 0 9a.m-...-. —. 041*} — 1.9 |40.6 | —.002 | —.002) 0.4 | 4.5 WINDS 10a.m...-. —. 035 | — 8,2 |—1.5 | —.036 | —.061 | 0.6 | 4.6 ditagmieees —. 029 | —12.7 |-2.8 | —.051 | —.038] 0.7 | 4.4 [eeteaee|] S|] Fe || Be |) Wy TOT oahcce —.008 | —16.3 |—4.1 | —.060]—.003] 0.9/4.6] 0 | oo] oil aslosl os ]l p.m.---.| +.010 | —18,4 |4.9 | —.064 | —.018 | 1.2 | 5.3 || Force ......]...... 1.4] 1.0] 1.0] 1.0 2p.m--...| -+.023 | —19, 9*|—4. 4 | —.082 | —.013 | 1.4 ||5.2 Sys acess =. 033 | —16.2 |—4.0 | —.070 | —.007 | 2.0 | 5.6 N.E. | N.W.| SE. |S. W Ape nie +. 0431] —12.5 |-3.6 | —.038}] .000] 1.9] 5.4 Per cent.-- 3.9 54. 6 2.2 4.8 Firpiileseee +.040 | — 8.9 |—3.3 | —.024 | +.016 | 1.6 | 4.3 || Force...._-. {01|ets21| fn 53\|) antag Gipameces +.037 | — 2.5 |—0.7 | +.009 | +.049} 1.1] 3.7 7p.m.....| +.033 | + 0.2 |+-0.2 | +.023 | +.219 | 0.9] 3.5 BAROMETER. Bp.m.-.-.| -+.021 | + 2.0 |40.8 | +.028 | +.125 | 1.1 | 3.5 | ,Rxtreme range of ahora Ta a), 1872, 9p.m-...-| +.004 | + 3.7 |41.0 | +. 034 | +. 140 1.2 | 4,3 || Lo 24.475 inches on Noy. 8 (11 p. m.), 1872. LOjpsmvessa= —. 002*|) + 5.5 41.1 | +.041 | +.179] 1.1) 3.8 THERMOMETER. 11 p.m---... -000 | + 7.4 [41.5 | +.043 | 4.165) 1.2] 3.5 Extreme range of dinrnal temperature : a 12 p.m..... EES OU a pce tess ett Sal f25040))| op 129 2 Heals cs || ROME OE 2 Te an eo aera Teas mee se +. 005t] -+10.0 }+2.4 | +.087] 4.076 | 1.2/3.2] eeweEN WED AND 2a.m.....) —.003 | +11.5 |42.7 | +.0386 | +.036 | 1.4] 3.2 DRY BULB THERMOMETERS. Saami ee (iM |) SST RESP || PCED | 083/10) |) 277 San ea eS = 5 a a a eae 4a.m..... —.014 | +13.9 |43.6 | +.025 | —.143] 1.1] 2.6 Scheie ie 3 eA Osi dees- —.017 | 4+14.7+/+-3.7 | +.025 | —.166] 0.9/2.8 £ Blplsi|a]é Be, 6a.m.....| —.020 | 413.9 [43.5 | 4.027] —.119| 13/378 | & | 4 [Fala RO Grand means| 24.975 | 28.2] 4.9| .075| .455| 1.1] 4.0 | yov'ds/3 p.m 60.0 |41.5/18.5|.136] «364 * Maxima. + Minima. GENERAL REMARKS UPON METEOROLOGICAL PHENOMENA OBSERVED. Rain began at 6 a.m., November 3; ceased 6.30 a.m.; a few drops at 1p.m., same day. Light rain with strong gusts of wind at 11.40 p.m., November 11. Rain and snow at 1.30 a,m., November 12. Snow, 6 a.m. to 2.30 p.m., November 13; same, 1.30 to 4.50 a.m.; and 7.30 to 9.30 a,m., November 15; same, 8.45 p. m. to 12.40 a. m., November 23. ' Mock sun in cirro-stratus clouds at 4.15 p. m., November 7, lasting 20 minutes. Circle around moon at 12 p.m., November 9. 550 BAROMETRIC HYPSOMETRY. SUMMARY OF HOURLY OBSERVATIONS AT LARAMIE, WYOMING, FROM DECEMBER 6 TO DECEMBER 20, 1872. Latitude, 419 19’. Altitude above sea-level, 7,123 feet. [Pl. 10, fig. 21.) : ; : ; aa 3 Pe || 5 as |éule REMARKS. nD a = a a aa a 5 24 PROPORTION OF CLEAR AND CLOUDED SKY. o> & Ips ie an 53 HO. : Hour. 33 = |see| = Qe || =i || ee Per ct : =| ao 1S 58.5 52 g |8ee| 8 ap |S8|Be 5.7 a o Oad 3 anes) [lee te 1S 8.7 a) a = ict =} Eel. || Girrns ..... 3.6 eo 0.3 12.8 " ©) S nM Cirro-stratus..- = 8.0 Cap sonce —. 026*] + 7.9 |4+ 1.8 | +.009 | —.103 | 0.6 | 4.9 || Cumulo-stratus ......-.......-..---. 2.4 8a.m..... —,. 023 | + 4.4 |4+ 1.2 | +. 011 | +.022 | 0.6 | 5.0 aPotaly.caes fee eee 100.0 Ojaamipeeee —.021|— 2.6] 0.0 | +.014 | +. 167] 0.6] 5.6 TEDE (Ofasmleeeee —.017 | — 9.7 |— 1.2 | —.002 | +.140 | 0.9] 5.7 lla.m-.....}] —.011 | —15.6 |— 3.0 | —.036 | +. 032 | 1.0 | 4.6 Calms.| N. | S. | E. | W. [omy eee +.006 | —16.6 |— 3.5 | —.040 | +.026 | 1.1] 4.4 = z= rea Bas pear oa face 42.020 || —18) 3 |—=74:4"|| == 046 |S. 099'| 0.9) [ans eee ea ee eee 2Qp.m..... -++.035 | —19.0*|— 4.9 | —.046 | +. 041 | 1.3 | 3.9 3 pme +. 043+] —15.3 |— 3.8 | —. 025 | +.089 | 1.1 | 4.0 N.E. | N.W.| SE. |S. Ww. AFT meee +.035 | —11.5 |— 2.7 | +. 001 | +.184 | 1.0 | 4.1 = 5 ipl sec. +0281] — 3:2) |—s0NSit e016) |t5 193) [70,8 (alee | ace alpen ea | ema Bae Gaps +.025 | + 1.0 |4+ 1.0] +.008 | +.051 | 0.5 | 4.8 7 {558 5500 +. 014 | + 2.5 |4+ 1.2 | -+.007 | +.018 | 0.5 | 4.7 BAROMETER. GM W soso ..009 4.0 |. 1. .007 | —.017 | 0.4] 4.5 |] Ext f ab 1 : are ae ae aes es From 23.300 inches on Dee. 11 (11a. m,), 1872 Spates +.008 | + 4.8 |4 1.5 | +.006 | —.037 | 0.3 | 4.0 |] To 22.718 inches on Dec. 20 (5 a. m.), 1872. fO;pemeeeee —,002 | + 7.5 |4+ 1.8 | +.008 } —.103 | 0.4 | 3.1 TREE. 1i p.m-.--. —.011 | + 8.6 [4 2.0 |) +.008 | —.149 | 0.7 | 4.0 Extreme rango of diurnal temperature: 12 p.m —. 017%) + 9.4 14 2.1 | +.008 | —.174 | 0.5 | 3.5 | prom Odo tat 7 pm. on Deo. 8 tem —.016 | + 9.6 |4+ 1.8] +.013 | —.101 | 0.7 | 3.8 GREATEST DIFFERENCE BETWEEN WET AND 2am ..... —.015 | + 9.2 J+ 1.3 | +.021 | +.014 | 0.5] 3.1 DRY BULB THERMOMETERS. Sages —.016 | +10.0 |+ 1.6 | +.018 | —.053 | 0.5] 2.8 = Ss ]4 = Atami eee —. 0114} +10.8 |+ 1.9 | +.015 | —.123 ] 0.5 | 3.5 2 2 3 g 12g Po) et Las al i= = 5a.m..... —. 012 | +11. 94+ 2.0} +.016 | —.146]0.4)3.6] 3 B |p lela | & | 8s Gams cece —.019 | 411.2 |+ 1.8] 4.018] —.10010.4}/35]_ 9 | 8 | 48 |F] als | aS Grandmeans| 23.026 | 17.3] 3.2] .046 | .469| 0.7 | 4.1 | po0-43 [3 p. m.| 58.0 |36.0/92.0|.090| .187 * Maxima. +t Minima. GENERAL REMARKS UPON METEOROLOGICAL PHENOMENA OBSERVED. Rain, 9.30 to 11.15 p.m., December 5; same, 6.10 to 7.10 p. m., December 10; same, 6 to 6.10 a. m, December 15; same, 7 to 9 p.m., December 18; same,7 a. m., December 20. HORARY CORRECTIONS. 551 Horary corrections, for reducing barometric readings to daily means. : < a a g ao Saale tol Boles = 5 a 3 E a S ra p 3 ey 5 . A o a ES 2 | : F 2 Ss = u ai Ze ns = f) a 3 S ite | S Station. E £ 2 3 12} S og aS x} ERS Ss o 4 [=] = oO oO Us] i=) io) oF, p > 2 a & A ipsa? | os ee | ele - a || ae = = Boa peed a ee eta | al ae ye |) 2 |g s | 2 co) eS 5 = = io aa a Pe h- a [aa o|B 2 | z & c) 4 a is) a ss] 5 I =| ‘S) ea) a Latitude ....... 39° 42/| 419 31/| 34° 03’! 35° 41’ | 38° 49’ | 40° 47/ | 39° 59 | 36° 50’ | 38° 16/] 38° 23/| 369 03’| 38° 16’] 37° 10 Altitude (feet)..| 8,587 | 6,096 325 | 7,044] 6,030] 4,339] 5,021 | 3,956] 5,915] 5,217] 3,449] 5,915 5, 989 Month.......-. June. | June. | June. | June. wus! July. | July. | July. | Aug. | Sept. | Sept. | Sept. | Sept —.037 | —. 028 | —.032 | —.026 | —.030 | —.031 } —.029 | —.039 | —.038 | —.031 | —. 027 —. 031 . 029 - 0382 . 044 . 027 . 028 . 036 - 035 . 044 - 048 .03L - 033 . 027 . 014 - 029 . 036 - 029 . 028 . 032 - 034 . 040 . 040 . 029 - 030 - 021 . 016 .018 . 033 - 025 . O21 . 029 - 024 . 036 - 035 - 023 . 024 . 009 -008 | —. 007 . 022 - 020 - 013 - 022 O15 . 027 - 023 | —. 012 - 022 —. 002 —.009 | +.008 |} —.012 | —.006 | —. 001 -014 | —.007 | —.018 | —.008 | +. 001 | —. 013 +. 010 1p.m +.013 | .016 | +.005 | +. 004 | +.014 | —.003 | +.017 | +.004] +.005] :017 | +. 006 - 023 2p. . 023 . 029 . 004 018 - 034 | +.010 - 034 .019 . 018 . 033 2 021 . 036 3p. - 035 . 034 - 013 . 028 . 043 015 041 . 037 . 038 . 032 . 036 , 041 4p. - 043 . 040 . 026 - 087 - 045 . 029 - 047 . 053 047 . 034 . 045 . 039 5p. - 050 . 042 . 033 . 044 - 047 . 040 045 . 069 . O54 . 030 - 045 - 038 6p. - 036 . 041 . 033 - 037 . 042 . 043 ~ 045 . 052 . O51, . 026 - 034 . 029 7p. - 029 . 036 . 028 - 033 - 022 . 037 - 027 - 042 - 037 | +. 014 - 028 +. 008 8p. -018} 4.017] .019] .025/ 4.005] .029]/-+.006] .029] .025]—.002| .016 —. 008 9p. -| +.005 | —. 010 - 010 | +. 004 | —.006 | +.014 | —.006 | +. 006 - 012 . 009 | +. 008 , 016 10 p. —. 009 015 .006 | —. 006 017 . 010 - 009 | —. 007 - 005 011 | —.005 . 016 1lp. -013 019 . 007 - 012 O17 . 005 . 007 - 008 | +. 001 . 012 - 014 - 016 12p. -017 017 . 009 - 010 017 . 005 - 001 -012 | —. 005 . 009 - 018 012 la. - 016 017 . 006 . 008 . 014 | +. 000 . 001 . 008 . 009 ~ C07 - 015 . 006 2a. . 010 . 016 - 007 . 004 013 | —. 004 - 004 - 006 O11 . 007 - 010 - 004 3a. 2012 -010 | +. 006 . 002 . O11 . 007 . 008 - 008 -O1L .016 | —. 008 . 006 4a. . 023 - 006 | —. 004 . 007 011 . 013 . 010 . 014 .018 -019 | +. 004 - 008 5a. . 029 . 014 . 012 - 020 013 - 022 . 024 - 022 - 027 . 029 | —. 009 . 017 6a. -| —- 028 | —.019 | —.017 | —.023 | —.023 | —.023 | —.029 | —. 042 | —.032 | —.034 | —. 017 —. 026 552 BAROMETRIC HYPSOMETRY. Horary corrections, for reducing barometric-readings to daily means—Continued. : o Zs : > : iS 5, + Ei $ SI a =] E =| = =) = 4 73 3 e 5 Bilis é S Pst 2 = S ee 2 4 =) = Cre re a : ta é ) rad nas ae I aA S 7 e as Station. E =) Ae oe = 8 s e o = 29 Ee ; | 84 / EF] 8 eal a|¢ a | 54 |] $4 ° = = i=) 8 a a = = = a 2 4 2 & g 3 S 2 &o a ES yee Wt ale a Soa 1g le Fa ese ecb s) fo) a = a S = S) a a 5 E Latitude....... 37° S5/ | 419 13’ | 35° 25’ | 419 47’ | 34° 33’ | 39° 10’ | 41° 19’ | 35° 02’ | 379 16’ | 45° 41 | 39° 18/] 40° 597 Altitude (feet). - 5,942) 4,374] 3,885] 6,840] 5,318] 5,145] 7,193 755 | 7,057] 4,839] 6,339] 4,355 Sept., Aug. Month ........ Oct. | “GP? | Oct. | Nov. | Nov. | Nov. | Dec. s sae Sept. | Sept. | Aug. | July. ESS sss 5e —. 022 | —. 031 | —. 029 | —. 022 | —.021 | —.023 | —.026 | —. 067 | —.039 | —.017 | —.029| —.045 8a.m 025 036 . 027 . 024 . 028 - 037 - 023 068 «044 . 026 . 029 . OSL 9a,m 028 040 . 023 - 022 . 030 041 - 021 071 . 035 - 636 - 029 . 047 10 a, m- 025 042 . 019 . 020 . 023 . 035 017 - 063 . 030 - 031 027 035 11 a.m. 020 034 | —.013 | —.014 | —.015 - 029 | —. 011 048 | —. 025 - 022 017 019 12m... —.009 023 +. 005 | +.020 | —. 008 | +. 006 027 | +. 003 -013 | —.009 | —.012 1p.m- +. 004 - 019 - 025 - 029 - 029 - 026 - 019 - 011 +. 003 —.003 - 006 - 006 - 003 —. 002 +. 002 —.001 - 005 —. 021 PPPPP Eos SOO =] BEBBEBS —.019 +. 001 -018 - 025 .031 - 032 - 031 - 028 - 020 -015 014 - 005 - 005 = 003 - 001 - 005 001 +. 012 -033 - 036 030 024 -028 -019 = 020 +. 010 —. 002 010 009 +008 010 = 006 008 007 —.014 -017 - 034 036 - 035 - 026 -014 = 008 +. 003 —. 003 - 003 - 004 - 006 - 005 - 006 - 008 - 012 —.014 —. 008 | +. 027 | +. 017 - 029 .041 041 - 035 -019 - 009 +.001 —.005 - 010 .013 . 015 —. 008 +010 - 023 033 - 043 ~040 037 = 033 2021 +. 004 =. 002 —. 000 003 005 —. 003 —. 003 +. 028 2041 1075 . OF6 -017 | —. 000 - 032 | +. 013 -041} .024 -043} .034 039} .030 -030] .028 -013| .023 -010 | .009 +.001 | +. 005 553 HORARY CORRECTIONS. Horary table, for reducing observed temperature to daily mean. “AON ‘sSutadg poos.u0}}09 *O[0D ‘aviqeT 36° 03" 38° 23/ 3, 449 5, 217 Sept. Sept. AMAAAMMANNOMDAMAAMNMOMNMHS boson Ihe eel Roel Solan he ard +1 I+ ae SMD MO OID OAM WS OH wt OD OR st OD IN CV Reseed +1 I+ + "Wei ‘woavog 19 ‘souepuedepuy dary 38° 16’ 36° 50/ 5,915 3, 956 Aug. July. PACH EMMONMADHAMOMEMOANQtHOS bs Reel fein ho heel ee ea] ++I I+ + NOK EE ArNOAMEANSCWONEEEARNS Bidrsdsdtsesdtsdisscraddcidda Sh oh Boe hoe Doe oe reese ++I I+ - *O[0D ‘soysnyT Wey ‘AUOOAVT HLS “0109 ‘ssmmdg ope10jop “xoTT 'N ‘90 ByUEg 380 49! 40° 47’ 39° 59/ 35° 41’ aie July. duly. July, June. ANeMOCSONHAHAOVOTErAOrPAOOSOMND hee Ree ie | +1 I+ ae Se De Re oe oe oe Dl Se re oe oe Dele el ! i+ + COPMAMMNHAHOOMWRNRONODErNAhDADMIrR reas Sn Re Dh ee +1 Nar ar SOMMOAANMODONANCHAMOMOHAHC Reade eae oe he ee ol t 1+ ar ‘TBO ‘sojesay soy 34° 03! June. TONAHOHONTHOMONRrOMOrraAacet ae +I I+ + oA A “TOATY W0IH “OOD ‘1A.0}09.1005) Station. 41° 31/ 39° 42/ Latitude...-.. Altitude (feet) June. June. Month.....-.. OCOMHMOMADOSCADAHOCSCOPAANNGSOAE™ Shoe ie oe Don oe hoe +1 I+ + POHMADMMMMrHOMMDAHOMNMOHAANOG naitsSagtdddsncndidradacnadastc Bo Oh es lh oe oe Do rasa HI i+ + Sean PDACHAAAMMNOCHDHAOHMANAH WIN} nae rain 27.7 37.5 29.8 27.7 43.5 33.6 26.1 19.9 38.1 29.5 Range of tem- perature BAROMETRIC HYPSOMETRY. oD4 Horary table, for reducing observed temperature to daily mean—Continued. ok Ay OLCRIUT “77.0 ‘aostauny ‘ary ‘,0080a oA M ‘019099 WONT AV ‘sduradg wopxnay, “THT ‘uopso “AON ‘ODOT “ok A ‘ounosoy9 ‘OLD ‘peplmany “Yup ‘ToAvogT 419 08/ 37° 55! 41913/ 3° 2 41° 47' 34° 33" 39° 17 37°10’ 38° 16/ 6, 041 5, 942 4,374 3, 885 6, 840 5, 318 5, 145 5, 989 5, 915 Altitude (foet) Novy. Nov. rs o yj Sept. Oct. Oct. Sept. ANSHOOMOMNASCNOMDNONOGSHOMAG Mor abai Sasi So Solis Orci rot mid o3 AeA Ae Seed ay ll [I at INMAMmOMNO MA OW S09 09 HO HO HID CO eR fhe Reels oe eo! +1 I+ a TRA DHONOCNOCSCDNAR HE OSM HOLM Gr inl ++I I+ raicdisAincdiscwidicsccinwrdaadacda reer rm ++I 1+ + MOADAHEKDNDANANNAOCHAMOOSCDAHMsMNOS ASHHGr agar aici & G45 4 wid is 1615 ban Sh oe he oe ho ee oe bn Oho Bh oe oe Bh oe oe ars | 1 I++ + ARNINDEOMMANAOHAINOMAHOATNHDOMmIO Foes es Me Re ee Pe eerie +1 + + AAMDAMAOCODOONMHAWANDOMNG OD aan nan +1 I+ + Range of tem- 33.6 14.0 39.1 34.6 38.4 32.3 35.1 23.4 22.6 2 I e ss] oT oO iT maxi- If g tables. * = - re oS ‘= ch in connection with minimum. Difference for y mean and select correspondin will decide the tables to be used for all observation in vicinity. perature during Mar: ghest observed tem: ge which, with the month. NoTre.—Take the difference between maximum and minimam for dail: mum is not observed, select hi several camps will give a ran TABLE OF ALTITUDES DETERMINED FROM SIMULTANEOUS CISTERN-BAROM- ETER OBSERVATIONS AT TWO OR MORE STATIONS. Nore.—This table contains only the altitudes of important peaks or points of local notoriety in the section embraced. Less than one-third of the altitudes determined by the cistern-barometer are included. With the aneroid determinations the list of computed barometric alti- tudes will exceed eleven thousand in number. To render this data useful otherwise than in the delineation of the topography of the country on the atlas map of the survey, it is contemplated, as already set forth, to publish at intervals “Tables of positions, distances, and altitudes.” These tables, with descriptive notes, it is hoped will prove of considerable practical advan- tage to the departments of the government operating in the more remote Western regions, to actual settlers, and to those who may hereafter occupy some portion of this territory. 555 556 BAROMETRIC HYPSOMETRY. Table of altitudes determined from simultaneous cistern-barometer observations ut two or more stations. No. Locality. State or Territory. BO PAbiquin Sasso eee socio ee ete eae aetna New Mexico -2----)-=—- 2) || INO LG Sano esta. coas cass eocceieesossesco sasose seoG@sssacc cosesecssae+ 33 || AGO. oe se casa coco coco dees Seo ce See Ceo aos: Sel ep encaesen cacces 45 |WAd obo Stahloness= season eae ee eee California -.----. ..---. Oy || JANE LTD sate ch Sosc GaSmSS coosee Ssetooss csecae See Colorado -==-- ee 6 | Agua Azul (northeast on Mesa)..---.. stecsrcetess sesscs New Mexico -.-.. .----- 7 |) Eee aioe TAG WEEP aoe pases 5558 sess sate sese| esses: GQ-es5 s250 52252202 OPA gal @Callenhe see ee ieee eee @aliformmia 2-25. =- -- ==-= 9) -Aenal Bria ees os a= ae eee ae bate csv etaoeacclescsesse ee) NOW MOXICOl= pe. Sc cae ae LO} Ana Neprae ras see ae nen eran eye naaa se eeee 11 | Aguajes de Los Guajolotes 1D) AAI TG PE Panne ces nee Sopeeacee nad Saco ne star cocaeaas IBY || AADC «anaes Sees eS5hcn Gasase bores soso booso5 Z 14) Altar Peak. 22. oc. .-ccjeane once seas ence sees eeiceec oa) COLOTACO ls saamee mente 115) |) Jiri) (Chi, 1G beesace sans csosce ne ceas csesoo cescosse| pas = 16; Antelope: Ranch=.-~s-0--= 2=<=.<-s-<--= 5-55.25 sssscseae= Ue || Jie Sov eeccocese cs ceeocese eens noo ceno se Se ceSe The} aes Oss 2525 sooo esse se 19 | Antelope Spring, Upper . BY) |) GS SDE. 3 eo on son coo ans ons cscesseconessses 21) Anton Chicd)..5 2522 sacs ee saos.sscceece a seosiacsee eee 22, |(Antoro Peak 2ca--ics-sacsee se - soa eeiececlas serene sartonas 23) ||pAmvil Rock: 22s. caann eso ee eee wie se nels sas Saeco neecec AFIZONA 2222-)<2 == sae DEE || TATE GARG) OPTID -5= se Seen caccecos cect encooceee esse mae Orcas csctingeaass4 20) PATA DS POIN Oho cee ere areas ne noel eer California <2. --=>-a=--6 26)|pAnpentine Pass! sas see ea aan oe en elemento ae Colorado 2.-222=--2--=2: 21a PAnk ances! Pass eee aoe eee eee ete eee nears peeOne c=) eeeeene aes 28) PAuistin seas fees os onan cease ae coe leo aeceae sjsace gees WNEVada::s5--jc-s2=2-<5 29 | Bacon Springs, main divide, northeast of -.....--..---- New Mexico -.--. --.-- SON PB ACOH) SPER G8 ase een eee a eae a eee pace Me aeses staecceecest SdIN| | BATTS ese eee cee eae ecard RasU Caan Soneeoasaons Seeses| (COMET a eéeodseens es 32)|eBab-li-vahespringesesee ese a clases soon eeieeaeete naa a oat CANTOR aanianecenee Soil (dail) G nes Soe cea cheers Bae cbonecsae ne sseaeabs asec bs GseG ss scesheccsoReeses 34 | Baldy Peak (east of Fort Cameron) .-------. ----------] Utah -----.-...--..---. 30 | Baldy (Elizabeth) Peak --_--- .--- -..--... ---. .--.<-.. New Mexico -.-....-.--- 36) | Baldyi(Santaik6)\ Peake 22sec nea nca aoa eee eee tO eoe nee soeeeaencss GPL || VIG EET ene icecn Heme eeeneeeinece EaSecocenone pee tOOtes se weseicesaecee 38 | Bare Mountain -..... @alifomia=.-s2-2---==- 39 | Bayard, Fort. ..---- New Mexico ....------- AU) | Reaver cst et ea ooo noose cea saie sone esata neeee eens (Utah s2S ee ice oaee CAN || IGE EGE 3 peceen cea cSmorS oced SHS os toa ESoneE cedeSs New Mexico --...-..... A Beat Cte ki ass sates ee eee Colorado === se -=-5--5 28) |) ITO nha esceesconeeg cesses codes tone caters Sass Nevada as2" 5 --e- ces 2 LN) | et\ Vary [aE Soe n osecos Sosbao Seas Hoceso sess esee WMD sssscgctecos tesec: 49')| Belleview Peak ----2- ---=-----0 «ss==- ae soeecsmerenes Golorsdoy-2=e-se5=—--—5 46\\\ ‘Bernalillo: :.-22-=,s-2s25 eae cceisasc cnc ee sens so toeseeees New Mexico -.----. ---- 47 | Berry’s Springs AS) BernalHillsos coe eee ee ee 49 | Big Lake (San Luis Valley) 50 | Blanco and Largo Cafions, junction of -..--...-.. ae GE LUGS) Dh Tee ea Bee entan been oo CeOese a Gene Sec Cyd | | WEY WET Sis Sb Aenean pad seoeaoces conase Scoocse aes boi sbold’s RaNGhe ja2c5 e =a aete see seine sectors 5S") sGoston Peak -.-2- s2-2.cccece ssoncussse cece aene eesneere |p pee UO eee saree ra Gay || ka TG ye 2S ee sone Bo ncecemeees Beoaco Greco cose Colorado ~..... .-...... G15 |) STE SGIE EU MEGINE oo oars Sos eno coconsSscoeccescee Osea ATIZONS —-.~ 2-25 new -- DU BOWIS, CAD. coe o—- coo. ones eee eee ee deSsop oes ees. Sosel lacs GO. Seem bab coos 68 |*Bennett’s Wells, Death Valley --..---.----.--- e950 208C California GOR Burra. Campr-eees a tosescce aos os =e sess ce -\eteeee New Mexico -..--...... 70 | Butte Valley post-office. ....--..-------.-------..----- Coloradopae-sesneeeens CAL || Lier Te (CMTE = occ coco oacGes SbonE 25 SeSoEaeRioeae New Mexico ...-.......- Ce || (CR hyn CRY o coeciceas Coco sac an sre pedo ouECHDOeneO Bade California ------..--... Ue) || CAGED I AIC pe sees coesas Heesoe DaOeS GoBeeecoses sees GReseeaesE ane mciee CE! || CU es Bo eee a eee c COC OF eInS AS SES n DCSE TONE IeD Code japon GW rcegas cess noo 7/3) || (CHIMES SOWIE) soeee onecro ones coscco aces sessee Bosses lars GWorcces caccooumeees 76 | Callville ...-..... -| Nevada... - fade | @ammlosy ivan ¢ hye a aie eens ee volta ialee nie -| California -. asi] (CEN 7 IPGL oe eon cee caonceétoso cocaceboceeoneeoce|| Cullen G Oe Sasecmece once GE |) Camo OhiGy S25 cocese sbeococna-eanecoro canes eeegasceas New Mexico --..-....---- HOU Canon Citypseneee meee oe aae cee ore ae oe ee ecte eee Woloradopesss=se2-2 eee Gil || (Chinn Sia shyt terion SOR een oa Snoo AonR cea sso Geer coondE ATIZON Spe eaeatael = ate ee || (Chiron Spy cat eck ceteccemncens cece consnane HHOECoEEaS Califarmisa = --s-1-2--e== 8B) || (Cmte STR IN ON ge cece anomeee ceeeoo PEOOOH Ee SneSpeeso osc) Seas Gh) k ermcpecinbe.coosee ist |) CEmene a) STETe S545 pocoas Gapeeo Hoos OSNSasadsised asoosy New Mexico ........... Ome Cantizosbenkememaime oe an cole e asec eens seatec et ell aaes onwesse 2 as 2ea)5 so ee- 86 | Carlin,camp near...---..-.--- Nevada 87 | Carr’s Cabin, Antelope Park.-... .-- Colorado 88 | Carthage, on Owen’s Lake....-- Aun So aeeeeteee eseseee California - Gk) || (CEG STORIE no-5 seen coond coc oop ceanod oapacencodccerss Arizona SOs | KCibolettiaeessrs.- cose esse ae Se Fs ate tenncepiee tees New Mexico 91 | Cement and Eureka Creeks, divide between .--.-.----- Colorado ....-....----- OPAC orrope ancoees neat ees eee eh seas cee ose ace eee New Mexico ..-.-.-.---- 93 | Cerro Gordo Landing, Colorado River ...----.----.---- California -..---..--. -. Ge || Chon Growin PAR posaccdessen cebccaquosse ssoreaAsscos Res O cease see sccelonsees GB) | (CER IEEN ieee scecmed ares SoeeSenebeaD bSoseuSoecoodes New Mexico ....-.----- OGii( Cheyenne 25. <.2-2-=22-..< Wyoming = sss 2cesss == Ce || (CLV CR Oi sao See eee @oloradat eee sectet= == Uileh |) Cinna seb oan cee eee eee ao oseecs Gano IU OSs =| io eee peeocecconse Son tC huckawallge cesses sacseme so mitsoe oseia neste =< irae Californian s-ss eases l= 100 | Cienega de San Simon ATIZOn ae eee ale ae ae HMI || (CATER 5 oc sp emetce HOCo dems as PAEOn SENS SEeSAnases New Mexico ...---.-.--- 1O20 h Cimelevillames ses eee ane hee eeie= = ss ese neces ==> TBS | CMO Sas h55 = Be Ae Se eer oaas a Spee OTe SEB enOESUnSoe 104 | Clear Creek and Platte Divide-.........----------.---- 105 | Coal-mines near Canon. City ..---------.-----..----..-|---- 106 | Cochetopa, or Los Pinos Agency --.----.--------. ------ 10a RCochetopalPaauwees sacs see wae ae ccna cloewe ss) ans 108 | Cochetopa and Saguache Divide, near head - .-- BOSD Colfax ae ayer cecartes at BE Seem Cae eoeeer ee reae Z 110 | Colonas Ferry, Rio Grande.....-..---.-. -------- ------ New Mexico -.-......-..- 111 | Colorado Creek and Rio Grande Junction.... .--.-.--- coor oes cessascaccss ot 112 | Colorado Springs (astronomical station) - ------ -------- Colorador2-ss-5 1-52 113} (Comejosee access OE Cee SCSS PESOS HAS SER cOSe S22GO vases nc aees taee ee TIE! |) Clones en ee aes ore Seo roceco mE oese see See DeeoeS Californian 522. 2525-4 115 | Conejos and San Juan, divide between..---------..--- Colorado .-.-...--...-. AIG Covleya Ranch seeensesce esac ice sar ioet aero eer on| PAPIZONA: < sccceel- owe - =o Zee Coombs statony sesceassen ee see a ene cece eres G@alifornia) <.=---5--<-=- 118 | Corinne (C. P. R. R. track by level) (Wtahee= assesses ae LORE COLralesi. oa aaetes aan seers ante New Mexico - - mes 120) || KOO sHHN os i5 scone ec oeeodo Chepos 6 2e60n aS SFOS IG I8 Sods Colorado ..--- nae 1238 |i Costillapbealoee oes see aete o> aefatan oe weeeees oe cite en New Mexico ....-...--- ey) | Chines (CHUN) S655 Gneece cones aa sess e505 Joosoos Nevadals 2222 -2->2—-5: Zan COLLGHWOOG SPLING sso mesa. els - === ees one eae oe Dim eheisenaenapenaos N24 Cotton oods statlOn sno cates ee a= ae ean te mea Califormiatce=—-=4 --<-=- 5) || CO aS piabaye coe ea nes oen ctsantesscen posses Heeccecsscoc!/s=c6 GO b= cease esd ab aes * Below the level of the sea. 557 Altitude mer above the ‘| sea (feet). 77 6, 947.6 52d | 13,328.6 49 6, 386. 4 40 9, 040, 7 65d —5.8 69d 7,277.4 62c¢ 5, 894. 2 77d 6, 820. 2 73d 1, 893. 8 73d 4,195.4 73d 1,314.1 73a 3, 687.7 66 944.6 73¢ 799. 0 6lc | 13,356.0 77d 7, 023. 0 62a 5, 395.5 83 5, 497.7 8ld 1, 238.5 65d 2, 650. 0 76 7,477.0 68b 9, 390. 4 40 4, 849. 4 61e 9, 988. 7 65¢ 3, 589. 0 76 6, 031.2 Tia | 6,410.7 6le | 12,786.5 62¢ | 14, 269.0 65d 3, 656. L 65D 8, 873.5 69d 7, 527.6 4dc 6, 041.0 70a | 6,076.3 74b | 4,201.4 81d 2, 095. 2 89 3, 854. 8 70a | 6,384.5 59 5, 624.8 70c 6,743.9 52d | 11,416.1 62a 5, 440. 9 61b 9, 088. 0 61b | 10, 032.3 61d 11, 234.3 62c¢ 8,599. 4 69b 7,442.7 69b 6, 386. 4 62a 6, 009. 7 69b 7,434.9 73¢ 2,564.9 6ld | 12,302.1 83 5, 366.8 73d | 2,885.5 41 4, 233.0 77d 5, 090.9 69d 7, 750.7 70a | 12,615.3 40 6, 437.2 66 3, 449.5 73d | 2,487.8 65 3, 875.5 558 BAROMETRIC HYPSOMETRY. Table of altitudes—Continued. Altitude No. Locality. State or Territory. Adtas| Alt the “| sea (feet). 126) \Cow Sprinp):-.--- .s===-feee eens eee eee New Mexico .....-.-.-.] &4 4,954.1 7PM CH @iGy Ss] Pa tess Saan6 625255 cosa ecen sesso sess ssa se evades yas ae eeee 58 3, 674.4 1285); -22- GO. Sent s satncs ee cnexccete eee ce eae eaiece seamen New Mexico .-........-| 76 7,201.8 1291|\\Coyote Water-holes\<>=-<.,.--s1es=-e-ssese eae eee ee eee do 84 6,774.8 1380 | Craig, Fort. 2. - (<<. . sc aeeseees ese een e cesar |eoo> do 84 4,447.5 1315 | (Cross SPE aot nee an pee eae ne sees ae eee eee GMeeosasasosesseneo:)) 27 6, 264.6 132 | Crossman’s Spring : Nevada .. 74a 4, 390.7 133 | Crystal Spring.---....---...- 5 See Oe 66 5, 782.0 134:|(Cubero gs. = ohe2—. 3 et a eee ee ee New Mexico -........-. Tia 6,121.9 135) | Cucamonga =~. ---<2=5- <-t seeee ssn sess cess -seees California -............} 73d 1,327.8 136 | Cucamonga Peak..........----- nosocs esos nsosse seosss| S222 GDsassa5 522557 252-2- 73d 8,829.4 137 =! GncharagPass oo oan ee eo oa ee eee G@oloradoy.=25e see ee ea 9,994.2 138 | Cucharas and Trinchera, divide between -.-..--.-----.|---- Cae ease eens 62c | 10,955.2 139) \sCachwHloe:--2 5-5. c-2o5s ssest oeete es case pees cee 77b 5,195. 4 14041). Cuddy’s ttaneh <= ..5 <= s2sjs. oteaates® ores oa ae seer ones 73¢ 5, 277.9 141 | Cuerno Verde Peak 62¢ 12, 340.6 142 | Culebra Church 69b 8, 009.7 143%) CulebrarPeakk, 455 \ 3-5 os 70a | 14,049.3 144; Camminss:; Ports... Je aseeee oct an sae eas secon ee eaeeee do 84 rEririCcd £459), Carranti@reek.Pass-..2-- 3-0 oc coe aoe eee Colorado =-.-s25-4.c-2-2= 61b 9, 653. 6 146 ||) Dawe's Ranch... = 22.,<2-ss.sa5e-sn0 seca es seee eecenae ee 73a 451.1 1474 Darwin! Cation 22-45 -2ss2- wasce co aees~ asec ence eee |eaee 65d 3, 143.1 J48) | Davtents. = -(<2- 22. caccs5 5.5 eoreenetee Jaen sescasoeees 52d 9, 333.3 149 | Death Valley, barometer-station I-...-..-...---. .----. California <<. = <--<-=2-. 65d | *— 69.2 150 | Death Valley, barometer-station II.-.....--...---...-.|---- 65d + 57.1 151 | Death Valley, barometer-station [iI 65d + 7.3 152 | Death Valley, barometer-station IV : 65d — 45.3 153 | Death Valley, barometer-station V ..---. ..---.-- 65d — 62.4 154 | Death Valley, barometer-station VI 65d —110.0 155 | Death Valley, barometer-station VII ..--...----...---. soos Wee cocscseses cee sse|| FF — 63.9 1567); DeliNOnte -s= = sesame an eae eee nine sea ee ee eee ee Colorado ---. --...-.-.. 61d 7, 742.7 157 Deep Spring. <2 2)c3 son coe eee eece i oe ese sn eeeeee Califommiay .-:2 2222 525s 65a 4,957.1 158) || Deer Spring. ----. -- =. 5-2 pemetnar sats setheseesesaees ATIZON AP eee ee soa ee 5, 981.9 959) sDefiarica wort... 2 asec ses see aene ac ces Soe eames ecco New Mexico, -..2----.-=- 68 7,041.7 160); DeleNorte: Knobs 22s 22sec eae ae oon recat ae eee eee Colorado) --.-22=/s2-=:-2: 6ld| 8,218.3 i615)-Del) Norte:Pealke:2--<. <-saseceewn ean scene Qecsaeees - 6ld | 13,084.1 162 | Denver (K.P. R. R. track by level) 53¢ 5, 196. 6 163), Deseret City, <= <2. ~-2=-s<<2-hesecen ses s i 50 4, 642.2 164} Desert Spring s aes sae New Mexico -.-..-.----- OUSM Gul al CAMONPMONUDE Ole = = o-= seat ese ee nies sola ne RE Osea oa eainle sae 219 | Gila River Junction, Big and Little acc Oonsese cse$es GSa8ee 220 | Glacier Peak @bloradoeeee ese eeee DoueGlenyillensseeem eases a= @alifornis 2-222 ---=---- 22» || GleM@IN) -2enos tac ans aoconn oeSned DOrD DadD Depesdoo Ieee WEI cope Scesooceop kone 223 | Goodwin, Old Camp, post-office..-...---. Game eee eees INVADE Ieee eee aeese nee Qk iy Cara ont TRI Be eed ganna po Seco bedene oeecod cSaeeoee Calitonmiagees ese eereer 225) | Clomntots) IRE TNG coae coe a oso son ceeds es eeee Seen raeres seen Oonanseee eeoosepeSe pols) || (Sain Laseoscecesaadee Dass cotogd CoE SaEmeceHcosonoes WHEN baes cabo ssoese 6 os Din Goulecsiiane Nees ane saa esiin el ane wae eee aioe Mea G hase tenes OO BSOSaS COST EGrahamevountatn! ooo. seems eae=e = === =i INSUANIEN aacecen dane Sone PAs) Grains WWI Gs Saeco oS sesncne seo ceneeseces @alitomine -se-cs- se 230 | Granite Springs....-.--....----.----- acti daacadeconss ee ntGW-ncobe seceec reds oe 231 | Grant, post-office. ...--....--.------------------------] Colorado ..----...----- BBP) Charinite Ola) Oh its eqpeneeenenes GaP n AEooe SoS enaeae coseer INGORE) SSasece coer ese 233 | Grant, New Camp, post-office ...--...-----.-.---------|----G0_---..------------ 234 | Grape Vine Peak. ...... ..---.-------.-.--------------| California ...--..------ 935 | Grape Vine Spring -.--..----.-- .-----------------+---|-- --d0..---------- =. -- =< 236 | Grape Vine Ranch .. BOE ne ne GS Comb on HmEeUEcCON cel -orat Upeenecos socmsc csor 237 | Gray’s Peak, north =.....----. ------ .----. «--=-4 e----= Colorado ....----- 238 | Gray’s Peak, south .....-..----. ---. -------------- ----|----G0.----. ------ ------ 239 | Gray’s Peak, north and south, divide between -.------- papi Gscc see Caseee oetsene 240 | Green River (astronomical station) -..---...---------- WAGONS cece ossce secs 241 | Griffith Peak (Colonidoyeeene se -nee 242 | Grizzly Peak @aliformiay---ee=-——= 243 | Guadalupita New Mexico . PAV (6 ribrpe@) Me ce Seeeee Hees ose Witabyes so CoG Gir URS Coss Sas dees aaedon cess ace pcnaa Sear Semrysare New Mexico - 246 | Half-Moon Creek, A. and P. divide, head of..---..----. @olorado\-- <== 5 -5-=---~ 247 | Half-Moon Creek, timber-line, head of-.----..---..----- Sa sce eee deseo cess 248 ' HalfMoon Creek Peak, south of ...-....-.--.----.-.-.!...- OSes ee ore Cee Altitude above the ‘| sea (feet). 5, 649. 3, 193. 13, 277. 5, 633. 10, 691. 5, 891. 5, 905. 4, 239. ¢ 11,722. 14, 321. 10, 075. 5, 296. 3, 393. 6, 025. 4,745. 8, 763. 6, 866. 4, 866. 7, 839. 5, 873. 4, 219. 12, 043. 405. 336. 5, 649. 6, 116. 9, 798. 6, 956. 7, 849. B, DUT. 11,770. 5, 905. 4, 917. 5, 743. 14, 243. 3, 094, 5, 220. 2, 816. 736. 3, 838, 4, 482. 4, 052. 10,516. 2, 080. 4, OLD. 8, 497. 2,118. 4, 833. 8, 527. 2, 431. 2,246. 14, 380. 14, 410. 13, 929. 6, 096. COM MNWUEHWUNHCWOUOHRME NU ORNWAMOSOHUNUDWDANOCNONSOHOSCASWACwHEEON Sot ry CBOAPHOP DOW IAM 560 BAROMETRIC HYPSOMETRY. Table of altitudes—Continued. Altitude No. Locality. State or Territory. piles above the sheet. sea, (feet). 249))) HalloraniSpon ys... 2.2 seen ee seen cee ne eece ec eee California ........----. 74a 3, 271.7 2008|\ Hall's Gulch Sammitsesseome-seee aeeee ee aeeee ee eeee Colorado 2 23.22552-5-2- 52d | 12, 670.8 2515 | Halls Ranchecss «ssccc cents Sateen eee ree pe eee erases COsessceracew ads es 61b 7,839.8 O52: | sHalPROWOrks 255.0 25 ses ho ee eee ea nL doe ne 52a] 9,916.5 253) |(Hamilton’s Ranch asesoccose me ore ee see ee eee ies ne ane 62¢ 7, 226.7 204'/|) Handie’s Peak)... --acesscseee= coven cecce cue cpeeee pee alters OOscseos ce ssaccs coe 6le | 14, 149.0 255:||\"Eland-cant Pass so scarey ne sere ae oo ane ere eee | ESE CT cy eres ree I 52d 12, 263. 0 256) Hartsell’aiRanchl (Mew) cesce ses see one mace cece ee ees meee do..... 61b 8, 828. 0- 207d Harvard Moun basse ecco ose Sears mee oe err ee ee do.eene 61b 14, 151.6 208) eax denl@reeksPasgs seo cocoon sense eee ee oe ee el eee OO seasons ses stone ee 616 10,780. 4 SESW MF enra neta tce Aa Joa ek Saee Pate BAN Ligand 58 | 5,474.8 S60il sHediondaDAakGs 2. oseoe eee ase cane mers New Mexico ...........| 69d] 7,149.0 261 | Hell Cafion, western entrance of...........-..--------]---- 0.43 es eee 77b 5, 99155 262 | Henson Creek and Animas River, divide between-.---.- Colorado\oss2—e ce see | Olen 2B 657 263 | Henson and Cebolla Creeks, divide between........-..].--- €Os535 a2 52 :soscsace us 6le | 13, 002.9 264) | SEOORIOTERASS Ee: 2 «oa cean Aer ce ee eee eae ea tee Osean ee easements 52d | 11, 627.1 265) Horse Sprinpasss. cass 25 a eee bene ae ene ee New Mexico ...........| 84 7,044.77 266 | Hot Springs, Diamond Creek ..-- oeee deseslen Oconee Cee oe 5,544.7 267.) (Hot Springs <2. os 2 casneo.e = heen eee e cae ne a aoe ell Ne Vad wae ene en eames a 48 4,730.8 268 | Hot Springs and Thunder Creek, divide between .----. Coloradoy..= 2-2 -22e-e- 6le | 11,643.38 269) FH owardsvallec seen. chee eee ee en es ee ii eee oe soeaue 6le 9,545. 2 DUO PiTual sass bone Ocoee ok tamer ms eT ITS Arizona sey ere 75 | 5,321.9 it) TERT Eee eR Ihc ote MORE AL ColorddG aa5 ee oe 62c | 4,714.5 272 | Hughes (astronomical station).......... -.-.....------|---- i eae eee ee 53 5, 021.0 27S3hEum phreys Peak, can one coo ee ree erect ee (ATIZ ONS eee ee | 12. 561.8 ida |prinn chbackyeenike (Oso) seseercn eee meee eee Colorado 6le | 13,755.5 210i sHuntersyanchcesses mosses. soe poe Roe he Pe i i 65e 6,274.7 276 | Huntington, Mohave River-..... : 73d 2, 598.6 S774 HuntavEcnkerc et eee ton 61b | 14, 054.6 Pion EUnrIiCAne pee aks-ee ee eee ee ee Be ee Phe week A 61e 13, 565.2 O70: idaho Springe is.) eee eee ae eae awe lee 58c | 7,284.0 260) Independence!Camp jessse onene see een eee nese eee =e 65a 3. 956.5 280 indian) Spring fa<\sacjec:-atee scence meee ce aoc oaeee een Utahyso-<-- S225 ceee 50 5, 283. 5 73a 2825) ndianiWellsse cst eee semen eee 73d 7 See eee 65d 2, 607.6 65e 283..\) [yan pahiqs So. jan.-sesicneces sent eace es case es eee sacl eee 7 284 | Jaycock’s Ranch --...-..- i = f ai i 220i i Jeftersoneee sees eee eee eee daiwa eee ee eee 52d | 9,862.5 286 | Jemez Mountain (A station XX)..........---.--.-.---. New Mexico .---.--.-.. 69d 9, 533.7 287 Il JemeziPeaks 2 ccc esac) tee one nay eee ace eee ee (ites eee Pee Ee 7D 8,568.9 265 Il) Sonia’ Peak ce, ohn /occ ec ae os Reena Semen California .....--.- 2... 65e | 9,712.2 289i, Johnsons ranch scc os. -c a eee 2 aes ee ees | Ot aaa 65a 3, 459.5 BON ifs car gh ee Ae one ee ngey (werent eo RE Gas 291 | Kerber and Poncho Creeks, divide between @olorado)-22=-= --<--—- 61b | 11, 129.7 202 iRemville, ©. 7e so 8c SNe eee eae California 1....| 65e | 2,550.7 903) WRincaids Ranch.0.cos.o°c2 ste Meee ee BeBe, (ak TRAE eae) oe 734| 1,771.0 294 | King’s Springs, Death Valley -.............--..------- 5 dg epic tae oe aaa 65 | — 995.1 295 Kneelinm Fess, Blut cosce cence hoe ee ee New Mexico _.....-__-. 84 7 902. 8 290s Rovlowskis Ranchss--nc n> tare ee Go. xc ae Bee 77b 6, 905. 3 BOT Wikia Bajadis << 5- cuca ra sian ce ae aoc alas hgh pec ee 7 | 5,514.5 AUB | Pa BAYONNE soe oe cec ee seca nae eee @nitarnia Fa ae ee 80a * 15 - BOO Metiatiran So! oc. sens cc ee eae cee boos cace oe eae La caleneencl en 62a | 5,217.8 300 | Lachusca New Mexico ....-...... 68 | 6,702.8 301 | La Glorieta neate wo ecene,| orze)| = 9. 0477 302 | Laguna Los Griegos Legge iaee ae eee 7 6. 655.5 SUB NMMADUINS cae oc crraeteccnee oe eat a ee 77a 6, 266. 0 304 | La Junta Colorado,2o2. eee ee sed | 6,612.0 305 | Lake City odo 5 1 bea eee 6le | 8,753.4 3063 |(Miake Creelvatdall:..-—o2co-2 258 oh estos ee 12 an bg] ee 52a} 9°384.2 S074 MakelCreekiPass <0 oe cec, on en sea ee OT dot Melee eee 61d 12° 996.3 308 | Lake City, Antelope Park, divide between. .........-.. 2 CRO uae hres nee eee TET 11. 777.7 ALTITUDES. Table of altitudes—Continued. 561 36 AST : itr Altitude Locality. State or Territory. raat above the *| sea (feet), MakeiPealo sero accee gee ann woneet aioe ese scteesea: New Mexico .......-..- 69d | 12, 405.3 areca Rane cate ee ete esas ones ese eceae California ......-..-.-.| 73¢ 129.2 HarpMonteai Springs.----220. ce <2 ose iis cacee sae) ese: New. Mexicor....----.-- 84 7, 735. 3 Lane’s Crossing, Mojave River .......-----.----.----- California .......-..... 73d 2,819.1 (an laeRanc her: tear Aeon eae dese es areewee Colorado: 5-225 <5-. ece 61b 6, 380, 1 are lacitaior Placitasa-ceese ses osties oo tas ace oe. New Mexico -..---..-..- 7ib 5, 129.3 UP 2K El 22 et Oe Oe ee Coloradoy-2= 222 cen-ceee|) Gloy| 13531650 fa Welates eee eee’ to Rene Ce asa toaaas cee daneeeese NewiMexicoieseecoeeoee 77a 6, 266. 0 Laramie ...-... ..-- Wyoming: cccee. sone 43d 7,123.0 Las Animas, west - Coloradomeee ee sae seeee|) 620 3, 885. 7 Haselaplacliae esses gee ecseee ethene suee os sa ssaees New Mexico ........---| 69a 8, 810.0 Was wViCPasy.) a setae oa Sect es ee Ce eeecee sa scagceease Nevadayen os cen aaaee nee 66 2,074.0 Mas NUuMitase saci fawact nine cece bose tose ne See eas eee New Mexico ........... 77 4,805.5 Mauehilin’ sealer ee yee eee eee ssa seo sa oo ees eeaadOnannns Soeceeaseoee 70d 8, 949. 9 a Vietae ea kw eset Mee aesnes ceees coos does Sate ce eSee Colorado eee ee eeee 62c 11, 653. 9 Meacheapeomt essa ne Peon sere wee Soe soe coe ad be ceee es Californias: S2o.0snee 73d 3,613.7 Lee’s Springs in Fremont Pass .-..-. .----.------------ Wtabe ooo. ok ee 59 6, 883. 1 beh ahi Saeet-a tec nee citce eee sek Sete ee) Se soosO Osseo coccos neces. 50 4, 596. 1 eonard’s Ranch, Arkansas River. -- <2 5.-. «sss. --<- Colorado) s2-27-se ee coe 61b 8, 335. 4 BiedendGri7s) Wella aaeenck secs ees ie eek teaches eeeees New Mexico .-.--..~--- 8y 4,601.3 Lime and Cascade Creeks, divide between ..---..----- Coloradoxeacceeecdoe- oe 6le 10, 703. 4 Lime or White Earth Creek Pass. .......-..-----..--.|---- GLENN 11, S13h7 incokns Moun tees aetna cers sees sae as cae eee oem 52d 14, 375.3 Enttile Cottonwood. oh.cece occ es wos Se ck 50 4, 359. 0 Pith aaVvosemMitentecser cscs sates seo oces 65e 6, 442.1 Liverpool Landing, Colorado River - - 74d 606. 3 Wouerbine het os oof lee atec cet ees 65b 3, 810. 1 ookougen lie. ees os see arse ae ec ohee eee seca saebes 65d 4,214.2 Mopazy nan Che saece vases ate cee eek oases secere sti sea es Oe cease secs tenes 73¢ 3, 248.3 HGOBPAIA COLES Hee eerie cee Soke aie cae een cre See aem as oe | ean OReococre st cele ees 73¢ 325. 6 os) Brazos) (niver bottom) s. 2- 22 cess -s 55 coe ~ ocoe ee oo ee New Mexico ........--.] 690 7,321.2 Heosi@erntosdel Aquilawese. <= costes sane easeeras Goes lass aOOnes ese cet secnes 69) 7, 942.6 MONTE av eZee te soe sSeack os Seis cc ciaee ses ee bellseee Ce er eee 77d 4,775.0 MosyEincimos anche es aces = sess sae ce net esas scenes sc eCalifornig.s.o2ssc225-% 73¢ 774.1 One AB ee pe ee re cree e eicict oe eee eens Seek New Mexico ..-..-.....- 77a 4, 405.5 osu Maeliosteencs serao are secre scat dens- Seee se one bea) ~6OOsooece ccs cessceces 69d 7, 289.8 Host@ jos, | Chamayhiverswa.sest aera sson acs see ete pean) ces GOS ess cere eeeeeee 69D 7,272.7 Los Pinos and Piedra Rivers, divide between...--. ---- Colorado) =<... 226 sects 6le LO7TT7 Los P nos and Rio Grande, divide between .-..-...---.|---- OO cos. nose pesos Soe5 6lc | 10,736.9 Anos Quelites:s sasscctoss Seas teste esses sees eee keaeee New Mexico .....-:..-- 77 5, 133.6 HEOSFLOLOS Se nas ee eens oe teases da ces esas dadecd Californiaj=.o-see CUES So DSED Em Bare OEeG oead Nese cce Shorr oreecss 73¢ 4.5 NieITMONNEM Wisse chic Seaiteem eehecs seccccaasccee nse cs|\Uitaltycaicnscuctecheess 58 6, 947.3 MN POSTOPEN Ge see.c see ae Soe set cecociee OL sales? New Mexico ..-....-.-. 83 4, 798. 6 MarshalliPassioas soos tok <2 ee eae newde acne Beek Sve| (Coloradot:sinetcoen es 61b | 10,851.7 Mantinez Mesa cccitencrcuico sees set leoe nese Seminntbee cs oe New Mexico ...........| 78d 6, 820.1 Maltin Sinan CHy-seces bcs eaeeees crctee cs acemues ct emedes Califormiarics s-jeascerce 73d 2,055. 1 Me@arthy/siRanch sos Gees. hoe oot es oS tie gece New Mexico! <2 --2-s-24)) 27a 6, 099, 4 McClellan's Peale 222 scc2F Sees Coloradomes-ss4 aes | eed) | ls, C1126 MeClure‘spRanch!: ..Sosaccseno ses ce a seg OOM sed eae sseersese ee | Ose 5, 318.4 Meliguphilints Ranch) ss. 322.secscrss scene o st Sea een se Eas Gotescsses so culeeeeee 52d 9,671.5 Meadow Mountain) . 2... 2. --22-- 2252-5 =. te iosasenasees Californian s-seseeece 65¢e | 11,'734.2 Mears'PReake. 222. . Ss.s55. <3. 2e25. Soteee Guat saeeeacese Coloradotzsssee ces e252 6le | 13,007.9 MeilostPedleos - sc 2dan = daeaiecar se sce cc ckbreesiedekas cesclete dos... -en see seeewek 6ld | 18,393.5 MPLURS GAMION Reis ee ote oan ve See cece ce eecte ashes Wtabtecaiesses seis. 59 6, 504, 2 Mimbres Mountains (A station XXXIX, 1873)..--....-. New Mexico..-...---=- 84 10, 061.1 Miner ihymessacaeseecas eee ee cecee ee aaem ome eee Colorad0#222—~2=<\-02-=- 6le | 11,473.7 562 BAROMETRIC HYPSOMETRY. Table of altitudes—Continued. Altitude No. State or Territory. as above the ‘| sea (feet). o/2)| Mineral Spring) 22222 een= as eea ee eiee shoe Been ase CATIZON ss ect en a ee eee 76 6, 670, 3 373) | Mocollon: Mesa «26. <.seee see en eee ee Oe re ee eee 76 7. 535. 3 374 | Mojave, €amp.-..-..--- ----- poe aah eco eee snot ee ies nes CORO ssa neeieeee 74d 759.0 375 || Moréy:= 2:22 25. << sence he eaarce see Soe goece soe aan eoas |PNeO wad ae == os ae 58 7, 383. 6 376 | Morton or Silver Heels Mountain ---.-.....-.....------| Colorado ..--......-..- 52d | 10,107.1 377. Moses (Pass 22225 Sex oe pee eae oe eet 62¢ 9, 849.1 378 | Mosquito ..-- = 52d | 10, 445.6 379") Mosquito) Pass) 25. 2592335 eS saees- eae a ere eee lee 52d] 13,308.4 380 | Mosquito Spring 73b 2, 009.8 381) Moun tPleasan tn =sen ase. ses a 2a ee te ee ee ae bee eto ee 50 5, 875. 0 382) Mountain Mead 0ws3-—4 5 one 5 eae ence anes Ge oss ons |e OOs eee ae noe eee 59 5,741.8 383 || Mountain! Sprints --- = see cap eee oe easel cee eee rer Neen eee ee eee 66 5, 400. 8 364, | Mule'Spring 2.5.22... 2/2esses -sescssneacece ~Sesse ease 84 5, 281.8 385: | Murderer’s Mesa, Calva Platean- -.--.----------- ----=-| Colorado --.... ..-.--=- Gle | 12,309.7 386i) \eNacimiento: Peaks oc oe eee eee oe eee 69d | 10,044.8 Soe NACINIeRtON aon ee eee ots See Meee aes eet PEN Neat a 69e 7,300.0 388 | Nambe Pueb o 69d 6, 045. 1 389 | Navajo Spring -.. - : 67 4,101.2 390!) Nebo Peak. «<..c.s5 26 sunccieeeee es teins ac cae eee eons oo Utah ere eee eee 50 11, 992.0 391i) Nelson’s Tank --2 255. s2e2sc.cht nee en ce Seo sez ese eee | SATIZONS. Aosee eee eee 75 6, 216.5 3921) Newberry Peak: 222. - 22. cose a obs fos oo cc nee ees esos) MC aNfORnia oS se=---eees TAc 3,375.4 393) | NicholsiPomt 5-00. = ene ene econ eee geen ae ee OR ee ee eee 73a 6, 262.7 3047) SNobmants Spring 225. ss oe 23 ae ene a cae pee Oana eon rae 74d 3, 734.7 S00 NOPdhOlte ccc 3.5.5 sete sae ceases eo eee ee Seo ae pee COs ae eee ee ee 73¢ 818.8 BOG || Nuttias 222 2 soo. oSenos oes tee aren Base can ees aes CNG WL MeGXICO = 2. aaoee tae 6,901.4 SOT E NU ERA GDR Oe a a enn Sere ees ea oa ree ee 00:2 Ssece< peters 76 6, 934. 0 S08) Nutinitas) Plaga ooce sess. cece ames ee eee a aiee staat | sens OOF ao eee 69b 7, 454.9 S90 Oakes Sprin pes tenement oeies og Hoes ee eee ee io= ser Meee OO aa ace a aeae ee eee 76 7,946.4 400 | Ocate Crater. -----.-- seuap oe estee ke coos Saeeee ee ean eee EO esse cosh s-peeetoee 70¢ 8, 902. 8 401 | Ogden (astronomical observatory) ----..---- ---------- (taht S22 ea- a. oars 41 4,374.0 402 | Ogden Junction Railroad (by level) ------ -------- ----]_--.do-----. -...-....... 41 4, 299. 6 403 | Ojitos-de-las Cuevas, or Two-Cave Spring .-.--.-.------- New Mexico ---.--.-.-- Tia 5, 901.8 A04) | Ojo Amarillo cccos- csc 8 dose ee ae ce eysen = se psn eS ee ee Oe eee eee 69e 6, 384.1 A05 ||, Ojo Caliente o-e= soe ewe a= nn === Nevada)... -- <--- .----- 49 4,743.9 Gf | Sirttedvhy Si ehyas he o-5 esenesses5 o506 s8ce eeess0 soso LEVON, S Scone B65665 c005 76 7, 867.2 578 | Summit Mines, general level.....-...------- ---------- Colorsdomeee-se ae saees Gld | 11, 089.2 579 | Sunday Peak. --...-..-- ..-. .--2-5 --- 2-2 «222 ---- 55 ===> Calitorniai=-eeeeeeee es 65e 8, 334.8 F200)|| orale Sos 6 acco Re cee RO CES TMGE: Uedolec cH ee peMeeEes coonee New Mexico - .....-..---. 84 6, 030.3 581) | (Sunset Crossing --..----.--- ---.--«- ---=---- ---------- IMACS cedeoceseecee s2|| 0 4 391.0 Ble) |Site Ch) coeecoccoseeo) clos eeue Bsod cee Seas eece Donel |e aocG)=-ceognoeasensseor 76 5, 754. 8 GSS) i) Sirnsarn WIS) 3588 pape soeeee coos ocdo BaeOr eee Bec se0eces | kc Sant. sec nsGas e556 76 5, 797.2 584 | Surveyors Wells - auer o2aGeraucee sabes eococ|| CHINGrINby 55 cccccasosel), (Ue!) 3, 567.1 585 | Tanks between Camp Apache and Camp Grant).----. =: ASSVADIG g coesos SSbe 4555 83 5,717.0 sth || MOS IRS choo coseees secede 2=s500 poooep BeeuMmacuseuose New Mexico ..- 70a | 13, 145.0 ier |) Mar NOs cos eoeeseces peSssb acy Coed esoose Sees Sono 26 ecooUlDncgcece tseasosceces 69d 6, 949. 4 GiSiS\ 4) GSO NS saeses Shcaasad eeacae Sdod Sess ecesbounesoE Been dOseee ser nee ete aer 69d 7,014.6 589 Taylor, WIGHT ican be cdissdc oeac Sean Seep eoed anes coacocas a5 SO Manntcsnee ses cegses Wa) 11,391.2 BODE elavlona Mancthsccncetscceicesecnmasees acl =iso i= = pee Onsen cdeese cece sees 78a 5, 830. 9 Bota ener ual (Moqui) secre eseees ete neee INSANE Gane Sosacdosse|| lel 6, 298. 8 592 Tehachapai endo GER Cue ese C eee er California -......---.-.] 73a 3, 830. 6 593 | Tehachapai Pass GWins55. noe ase ssaese 734 3, 831.9 594 | TehachapaiPeak BEAU paces eeeceaes sasc|| Mel 2, 263. 1 595 | Tejon, Old Fort Bee aeeceereeceeedodod|| .Zel 3, 245.7 596 | Ten Mile and Eagle Creek, divide betw een Soriansistaisees (Coloradoie see aa eee alee eLOnobak ey cia IETS Sane ene ees gs See eel re Ose eevee ekts eee a) coeds LON OlsO 598 | Tetilla Peak -...-... New Mexico ...--..-.--| 77) 7, 060.0 599 | Thomas Ranch z California; =2--4---e | tee 3,771.6 GUOm mMihiind erie Galke eee cee ese aeE Seed (Neca nse Screen) q Si) 9,121.7 601 | Tierra Amarilla New Mexico .....---.--| 69b 7,499. 8 602 | Tijeras ..---. ---- 2. ---- --2.0--- ee enn one eee = == Dose eo ce wore | Le. 6, 213.7 603 | Tim-pa-ute, or Maguinta Spring--..--..-------------- SNGwallaccn: eee 58 6, 891.7 604 | Tinnah-kah Springs ue Edn ieee 66 4,079.9 605n | eliptonbbeak: seasons ae mecetesecieme camer = =~ ArIZOD 8s. oo=0 = see == | Ae 7, 364.4 606 | Toas Kete .......------ .| New Mexico ...-.-.----| 68 6, 505.8 607 | Too-lee-cha Peak....-. - C@aliformiaiaes-oces- eee 65 7,021.8 (AUS || GMaas SMES sogeoneoco cabs oooseo Eeme neces conaeene News Mexico) sceee sce ee) 7, 151.1 GOON ebrincherat bea kesee se ciara nate ire ee ale aisle mim ln Golorado)-sss--ceee eee || 20a) 13563057, 610 | Trinidad (astronomical monument) ------------------- SeacKteeeceo Uae oaeesoe 70a 5, 989. 9 GbL.)) SAG) Scan ees bo eceoeoosSc6 epenee Heemepienes satmnc New Mexico .......--- 83 4, 346. 6 612 | Trout Creek Pass.. Colorsdosss=- > === 61b 9, 612.7 GIST Ebronb Wakes sce ean saeco ae eel nie eee = = mln! minim Se ce OON Se eee eee eee ice (GLO 9, 700, 2 614 | Truxton Springs .-.----.-----.----- Arizona 7 3, 885. 5 (G15) | UR psec Gecoao cecocncoeode cose Soe dOeem ees 39 CE GBA 616 | Tule Spring...--. ----..-- --0--- see --- = === soos sesci@==o- 555 7 5, 924.7 617 | Tulerosa, Old Fort New Mexico 83 6,740.4 (Sere IM GER 4 Se See eodccn Saas checea cosees carbon Be OO son aaas aeons =e 6rd 5,510.0 G19) win Creeks Pisses <=. -- ae eee ae sale ===) Colorado 2-2 -22eee 62d 8, 568. 1 620 | Uncompahgre Creek and Animas, divide between. . ---.|-. -.do..-....--.---.---- 6le | 11,928.0 ‘21 | Uncompahgre Peak ...-....---- ..---. ------ +--+ -+----!---- GOeesseeeceeees = Ole 14 40arA 566 BAROMETRIC HYPSOMETRY. Table of altitudes—Continued. Altitude No. Locality. State or Territory. Atlas nove the sheet. sea (feet). OPA hairs Oye seme. coocan cocoa seccen eseeesorecec cesopsas New Mexico ..----.... | 70c 6,744.1 6235 sUnion) (Parkoce aes eee me eee a teeter ates ete oreo Coloradojes=s-eeseeee- 61d 9, 654.8 G24) Union Pass) cesceee SOO CREE Poa necpe sre casaocte Fees MATIZON ie eee aaa steer maa 3, 600.0 625 | United States Mountain New Mexico =-- -2------- 69d | 10,734. 3 6263| TU tetPeakes2.5 ae nee eerie eee eee eer ees |e dOmeanee =) necen cee 696 | 10, 152.3 627 | Venable’s Ranch .-- Colorado ... 61d 7, 628.1 (OPIS) |) WWGTENEID S/O cocso teen nsencedeecoesoaed coasco oadces New Mexico 76 5, 981. 9 (SE) || Wana) CHD Son oneness pence senceao Uesoos Gna cSonoces IATIZON Ay Pee een es 75 3, 159.7 G30) Siiersenes han beeen eee aie iee te eee Califormia) ..---.----<- 73¢ 940.0 6310 RV lin teens PRL Pees teee eae ee eer NeweMexicoyee nes eee 7 7,106.4 632 | Wah Wah, or Ha-wa-wah Spring...--......-..-..----- Witahe esa sss ches cece 59 5, 545. 9 Gab} |) WWW IRE ns Song 5 aS ou asSSon Sond Hosess cone sane Califomiaeeees--- 65a | 11,261.1 Cpe | \Wwerean Spsibiy ee ccacs cemsec asco cSbecemsnascos anoocs secs) UWIIBIN cosccemee ossetoc 67 3, 806. 9 6351 Wiss hin otonveeaseae are sacararet eile aaa serene ine eee eee Beare Gorscae ssc aeetee 67 2,905. 0 636 | Washington, Mount-.- . 22 -| California =---..-----. | 73d | 10;801.9 637 | Washington Pass-.... - 3a 5 =||PAnizona)scese soso === ei Sd, 8, 825. 5 635) (Wreldéneens sie ac oon xeene acces tesa se Seces oe yoetenteueee Californiayseses2-e eee 65c 2,716.9 G39) Weston’s Pass): -:2y. 222 anc2c2n See coc coceo sant seeSestes Colorado esses -eoeen ee 52d} 12,108.8 GED |) \NV@SiS RETO Nps ess cocens capone Sootossnecce esse Coaliforniat: 222-2 see ead 595. 6 (EMT |) Vilar 3thntae POWYS. oe se cee nesocs cooesccoases coos IN@vad denen seme e= =e 66 5, 019. 8 6425) WihiteiGranite;Mountain\==-----2ss- e-s—- =e Californiay-sse ese eee 736 7,045.0 643 | White River Junction, North and South Forks- -.-..--.- Dtaliee a2 Sessa ate ae 51 7, 088. U0 6445 SWilhteshocksS prin Opes =sesee een sese ease eee eer Arizonaer ees eear eee 68e 6, 301.2 6459) Wibite’s'Ranch; HuerfanonValleysa---sss4ee eae | LO OLOLaC Ones na eee eee 62¢ 7,469. 0 646 | Whitney’s Meadows..-.--...-.--..---..-.----- .-- -| California .....-. 65¢ 9,371.4 647 | Whitney’s Peak (called also Fisherman’s Peak)..-..---].--. dopssoewyescase .| 65a} 14, 448.4 648) | AWihitlock’s|@ iene pat seca. eee aieaealeeto Sac eeee ena cena IATIZONG saee ee eee sees eo 3,579.5 649 | Wilcox Ranch, Antelope Park -.....-...-...----.----- @oloradopees-sese=s ee SOLE 9, C00. 1 Ba) || \WM Res owe 5 cose Socees coonas ens ponooe see California =--ses es see- 65d 4, 683. 4 Gole Wallowa s prin esse. == ase aaa en ieeae ia oe eee IATIZONA Nes ae aioaesisoe ss) LO. 7, 294.8 6528 Seas. OW 2a55 saboee Cece ceSceS como noo DoS cece Goss6o onanss @alifornintess-=-e-eeeeee 73a 2,530.8 (33) |Isosie5- ODacaccsesco on sees SonSoo Coban Sede odsc00 ao0e code |seee Oe ncisns Good cssene Ss 81d 420.0 604))|seees5 CBR BeBe CCC oS O Co poo Ero -mEecoonesearcrccmcasccs New Mexico ..-...-..-. iia 6, 676.6 655)|Saeee dof2sa-- Sa8e SaSRSn 9545550 6550 O0DOSS Sane ooSoos OSad Wtaht aaa) eseeeeeceee 50 4, 421.6 656 | Willow Tree Spring.-....----..---.--- California .......-.....| 73b 2,500. 0 657 | Wingate, Old Fort -....-..-.--..----- New Mexico ...-.......] 77a 6, 507.3 (aBjst |) MWe, ROMA co noss Sooeco oso Sosensoeso sconSsoses cooa]|sass GWecoata sacoae sease 76 7,037.7 659: | Winnemucca (Signal Office) -..............----. .----- Nevadaeeeteee eeocee: 39d 4, 355. 0 660) | SWorkman(siRanchiee-<.-oseseee ences see eee ees eeeae California ....-...---- 73¢ 361.6 661 || Yellow Beak: s.cosccdes- toewae sone eecce oe ceeeeasene (Coloradoeeesces eee eee ole 18, 618. 0 662) || Young’s Ranch..-. .----..----.- eeeeeee oesonnsoso case WEIN, secso on50 soscsee 49 5, 642. 2 663) || Yucca; Camp 222 s5ss2sssss0e 505 4-eoeee ese esse ceteee New Mexico -.....----. 89 4, 373.9 664 |Zuni, near. 5.22 2 s> 7 SURVEYS WEST OF 1007" MERIDIAN. 8 9 10 Nn 2 2234s 66 8 9 wD = + = = cs = = : === + - + = = SS = = = = wi wots 8 as 6 89M it 2a465 6 ohea oF 8 9 OD i eg 45 ¢6¢7 8 9 Dn EB 23 45 6 E - * . arometer. | . 7 7 : 7 ay r <4 * = y | = rs $ ¢ i so. _ ~" € x # e - ‘ » 1 ‘ ~ a -o- \ 7 i ; = amt * '? — 5 => = he ‘ . ' : - > = ‘ i t - \ Fi 7 * ; = 3 : 1 , ) / ‘ ‘ H s . _ + Fie. 19. Fie. 20. Fig. 21. Fig. 22. Fig. 23. Fig, 24. PLATE X. Showing diurnal barometric oscillation. Fort Prescott, Ariz. Lat. 34°33’. Altitude 5318 feet ; range of diurnal temperature 38°. from hourly observations taken from November 1 to November 8, 1871. Gunnison, Utah. Lat.39°10’. Altitude 5144.6 feet ; range of diurnal temperature 34°.6. from hourly observations taken from November 1 to December 1, 1872. Laramie, Wyo. Lat. 41°19’. Altitude 7123 feet; range cf diurnal temperature 30°.9. from hourly observations taken from December 6 to December 30, 1872. Winnemucca, Nev. Lat. 40°58’. Altitude 4355 feet ; range of diurnal temperature 35°.5. from hourly observations taken from July 23 to July 28, 1873. Virginia City, Nev. Lat.39°17’. Altitude 6339 feet ; range of diurnal temperature 17°.4. from hourly observations taken from August 5 to August 31, 1873. Bozeman, Mont. Lat.45° 41’. Altitude 4838.6 feet; range of diurnal temperature 16°.1. from hourly observations taken from September 11 to September 31, 1873. Results Results Results Results Results Results VOLIMETEOROLOGY _ i Se — = i U.S. GEOGRAPHICAL SURVEYS WEST OF 1007 MERIDIAN. PLATE X ‘Inches of _ | . jaromneter. — ae as 6 8 9» nw 4 6 7) == : Saae| === : ==== == =S===| = SE SS = === 2252 = 25 == Soa = So ==== === SSS = === = = ; = = = 2 | bk = = | 4 - ~ 1 1 , | === == =. : | = == 2 = = =f SSS == | : - +44 DaeeE - 4 | = == = eae = = + = = = == =| === : : - = i = Sei = = = = 8 8 1 D es 5 e 30 Tn iz & @ 4 6 6 Mmchesof ||_8 9 © 1 23845 67 8 9 10 12 ater 6 i ’ Barometer. | B ! = = Sas = = = = | . PLATE XI. Showing diurnal temperature oscillation. Fic. 25. Georgetown, Colo. Results from observations taken hourly from June 16 to July 5, 1873. Fic. 26. Green River Station, Wyo. Results from observations taken hourly from June 5 to June 29, 1873. Fia. 27. Los Angeles, Cal. Results from observations taken hourly from June 11 to June 23, 1875. FiG. 28. Salt Lake City, Utah. Results from observations taken hourly from July 13 to August 1, 1872. Fic. 29. Santa Fé, N. Mex. Results from observations taken hourly from June 11 to June 20, 1873. Fic. 30. Colorado Springs, Colo. Results from observations taken hourly from July 29 to August 10, 1873. VOL. II METEOROLOGY. lay Fy 8 9 0u wih e2 5 U.S. GEOGRAPHICAL SURVEYS WEST OF 1007 4 MERIDIAN. D Fah eit. De gress. e E = == = : + = == 2 =) Brsss= == — — _ / : = = = = - i Se = = — = 3: : — = : 2 = 3 == === = F : 32 =o [a == =e = == = — £ =p Z=== = LS = "i = - 2= z = f == == 25 2: = = == = = = ——- = = = : : = =e s = == p= ae = = ====== = Sees + S==: a ee = = : = : — ==> = === + omeae sae! : === SS ee 4 = = === = === =] = $=) 2 SS ¥ T = ——- - = = == == 33 = = = = i —— = = =a + = = = a z f = a = + === | Pas ees enhei @ 9 10 1 1 + f ie Aus hier). re," FiG. FiG. Fic. Fic. Fic. Fic. 31. 32. 33. 34. 35. 36. PLATE XII. Showing diurnal temperature oscillation. Beaver, Utah. Results from observations taken hourly from August 8 to August 25, 1872. Labran, Colo. Results from observations taken hourly from August 12 to August 27, 1873. Beaver, Utah. Results from observations taken hourly from August 30 to September 7, 1872. Camp Independence, Cal. Results from observations taken hourly from July 19 to August 9, 1871. Hughes, Colo. Results from observations taken hourly from July 12 to July 23, 1873. Cottonwood Springs, Nev. Results from observations taken hourly from August 31 to September 14, 1871. VOL. I METEOROLOGY. -U.S. GEOGRAPHICAL SURVEYS WEST OF 1007 MERIDIAN. PLATE XI. ee me beouiere ieee AM jaof'e 3s 465 6 8 8 10 12 123 4 5 ' —- = = —— —- ; = — = = = ‘Ts 9 WU 2 3 5 6 8 9 Wi 2 Fy Se kA bi, Ba De ees 8 89 DW dz 6 8 9 10 py eee as e 4 if PM. \F enheit ee 2M AM. . ay id Ly >» 26 5 4 e = nat oan / > a j ae on es ao S.4 > a. 2 Fic. Fic. Fic. Fia. Fic. Fic. 37. 338. 39. 40. 41. 42. , PLATE XIII. Showing diurnal temperature oscillation. Trinidad, Colo. Results from observations taken hourly from September 4 to September 19, 1873. Cheyenne, Wyo. Results from observations taken hourly from September 15 to October 31, 1872. Ogden, Utah. Results from observations taken hourly from September 26 to October 3, 1873. Prescott, Ariz. Results from observations taken hourly from November 1 to November 8, 1871. Pioche, Nev. Results from observations taken hourly from September 27 to October 14, 1872. Fort Fred. Steele, Wyo. Results from observations taken hourly from October 30 to November 27, 1872. _7| zi al ool or =i ty - ol Oo} «7 a | 2 hy Pall oO | i tal Ei}| 3h ww | Lal Ww | 8h 2g f fae B iis | Eee © I me re) Ey i) tlt ad || ol Oo Sa Be Tall - i) A na, ol! |} all al | ht OF mb = (ea) ) 6G IL fy) AE = g [| il al. aie ll 68 69 0 u it oO 4 i + I eal oy) | =e = iB A | ie eh 2 | i easy Us) | eal ty] | s i} A | | | a |] | at |} we | 84 || £0 || ‘coe || OF | Afd | Fy | —| © | in ot ls || bea | a |i {| Ay] 7a |! Ie || od I © Let bd i” iy A rt) E] it EI} Cae [J cy (a Fic. Fic. Fic Fic. FiG. Fig. 43. 44, . 45. 46. 47. 48. PLATE XIV. Showing mean difference wet and dry thermometers. Georgetown, Colo. Results from observations taken hourly from June 16 to July 5, 1873. Green River Station, Wyo. Results from observations taken hourly from June 5 to June 29, 1873. Los Angeles, Cal. Results from observations taken hourly from June 11 to June 23, 1875. Salt Lake City, Utah. Results from observations taken hourly from July 13 to August 1, 1872. Sania Fé, N. Mex. Results from observations taken hourly from Juve 11 to June 20, 1873. Colorado Springs, Colo. Results from observations taken hourly from July 29 to August 10, 1873. U.S. GEOGRAPHICAL SURVEYS WEST OF 1007 MERIDIAN PLATE XIV | Degrees A . mae 6 8 130m a2 | 2 3 4 5 6 Fahrenheit. 8 9 10 Wea | BEEE === = = == = SESE : =e IE = mmee | == = = = = iE = = = = re = = eee =—E <= | = = === = 3 | = = 4 BSS SS SS SSS = =! ee === = = == == See == = | = = = ) == F = = = == = + = = | = : : = = + = =] + = | : = 4 : = : =: + = == | ‘= = Se ze =} S| =: = } : } | | } = } + :: = + —— i =F | Se = | = a: ! + i t == . + + + ‘ | i fp | + | : + | = =: | : = 4 4 32225 | | = == | = = i : =: + = == = : = =e ==: = = et | = : : i] = : | E | 8s 2 B 2S Re eS: 89 wb HU Bis a. 5S yy 7s > ee) ae EE Seem 6 fu G) BIO lua zee Re SAS) Beal : i pegrees. : a oe i __ Fah = ~~ pe a? i . ; oer Ae a , F. ~~ ‘ Ha * ee ; > as “ eae Tie t ; _ = ax { lula Fic. Fic. Fic. Fic. Fic. Fic, PLATE XV. Showing mean difference-wet and dry thermometers. . Beaver, Utah. Results from observations taken hourly from August 8 to August 25, 1872. . Labran, Colo. Results from observations taken hourly from August 12 to August 27, 1873. . Beaver, Utah. Results from observations taken hourly from August 30 to September 7, 1872. . Camp Independence, Cal. Results from observations taken hourly from July 19 to August 9, 1871. . Hughes, Colo. Results from observations taken hourly from July 12 to July 23, 1873. . Cottonwood Springs, Nev. Results from observations taken hourly from August 31 to September 14, 1871. VOL.U.METEOROLOGY US. GEOGRAPHICAL SURVEYS WEST OF 1007* MERIDIAN PLATE ZV. ' AM PIN 68 910 D 2 De es ie 2 3.45 6 Fahienteit. 89oON Ip 234s 6 = = = t ========= “EE = === === ==== : | | =- t= = = = | as : —eeee = = : = - | sep etd ie : —— - = = —e = = : = 1 = s | = = : | (SS SS=S5= =: | | | = = : : = = = + | = > i = i = = = = = —— : ! = = = =: = Es + f = : = as | i} il LH! septa t2a456 7s eon | 23456 Degrees Sone L234 5 6 4 bd Fahrenheit. R i 3 Lae _ : | || 1\ “ , 7 , oo a 5 iid) en 8 et eh aes 1) BP ae vere ae eee ee ee ae ee ee ee Pe i » 26 lem oe? Pe a o w @ r - eo ee - a > 2 ‘ i ’ ; M A 7 ; . My . 7 = 4 Pi - 7 F 2 - = om e , mart = i 7 ~ - ® ~ $ x £ 7 : > * 5 & S « ‘ . pS — a 4 p ' .< 7 7 ; D ‘ ‘ . Fomyy ‘c nl ? u ® ‘i - - < = oD 2 oo 7 — - ‘ _ i. & ‘ - : Fey. A od ain = B . ar oN . . 7 aa ® ss . 2) ’ Ss id a ‘ be : ete 7 » AM at a. PLATE XVI. Showing mean difference wet and dry thermometers. Fic. 55. Trinidad, Colo. Results from observations taken hourly from September 4 to September 19, 1873. Fic. 56. Cheyenne, Wyo. Results from observations taken hourly from September 15 to October 21, 1872. Fic. 57. Ogden; Utah. Results from observations taken hourly from September 26 to October 3, 1873. Fic. 58. Prescott, Ariz. Results from observations taken hourly from November 1 to November 8, 1871. Fic. 59. Pioche, Nev. Results from observations taken hourly from September 27 to October 14, 1872. Fic. 60. Fort Fred. Steele, Wyo. Results from observations taken hourly from October 30 to November 27, 1872. VOL. METEOROLOGY, U.S. GEOGRAPHICAL SURVEYS WEST OF 1007 MERIDIAN. ikeer ; : Fakfonheit a ® 10 JL an : es 2 i De 8 » 10 ir 32 2aa4 65 ] fjipy ba tp TTT | TMAH HU 1h i Wi ul i] | cy 7 a © 10 1 12 aa24S5 6 Degrees. 9 Io iW aaa 26 v4 6 | Fahtenheit. wt i Fic. Fic. Fic. Fig. Fic. Fic. 61. 62. 63. 64, 65. 66. PLATE XVII. Showing diurnal force of vapor. Colorado Springs, Colo. Results from observations taken hourly from July 29 to August 10, 1873. Los Angeles, Cal. Results from observations taken hourly from June 11 to June 28, 1875. Georgetown, Colo. Results from observations taken hourly from June 16 to July 5, 1873. Salt Lake City, Utah. Results from observations taken hourly from July 13 to August 1, 1873. Santa Fé, N. Mex. Results from observations taken hourly from June 11 to June 20, 1873. Green River, Wyo. Results from observations taken hourly from June 5 to June 29, 1873. . VOL. I METEOROLOGY. U.S. GEOGRAPHICAL SURVEYS WEST OF 1007? MERIDIAN. PLATE XVI. Pa. ; ‘| Inches of ; 8 9 10 2 3a Piet Wer as ee a 9 10 4 3a Barome Te e 9 10 11 Oe iar Sa Inches of gare EG es wil 2 ass a | Barometer. AM PM. | : | = ‘SSS s = =! fe Ne Fic. Fic. Fic. FiG. Fic. Fic. 67. 68. 69. 70. ZA 72. PLATE XVIII. Showing diurnal force of vapor. Beaver, Utah. Results from observations taken hourly from August 8 to August 25, 1872. Cottonwood Springs, Nev. Results from observations taken hourly from August 31 to September 14, 1871. Labran, Colo. Results from observations taken hourly from August 12 to August 27, 1873. Beaver, Utah. Results from observations taken hourly from August 30 to September 7, 1872. Hughes, Colo. Results from observations taken hourly from July 12 to July 23, 1873. Camp Independence, Cal. Results from observations taken hourly from July 19 to August 9, 1871. a VOLI.METEOROLOGY PLATE SIL, U.S. GECGRAPHICAL SURVEYS WEST OF 100°" MERIDIAN ara. BI ele v2 A wey “Inches of |, a ge 7 eT a 9 ao_a1_33 ‘203 5 B_9 10 3r 12 25 arameter. : | = = = = | = == S=== + = > i : + f + : | | = =: | : | = —— : + + ==: = — = i | S = —— + | == : | = $ | = : | i IE | ! + E | | | | | | B 8 10 Wt 12 as 4 66 7 8 8 1011 12 aS eres) ie: 8 8 IO II i2 eee 6 7-8 8 011 B 2345 6 | [ Inches of © } ah ci I ae Barometer. ~*~ ay 7 ae \ F al ; ‘ ’ — Ss . . < > " i oe fo re : * * . 2 Fic. Fic. Fic. Fic. Fic. Fic. PLATE XIX. Showing diurnal force of vapor. . Pioche, Nev. Results from observations taken hourly from September 27 to October 14, 1872. . Prescott, Ariz. Results from observations taken hourly from November 1 to November 8, 1871. . Trinidad, Colo. Kesults from observations taken hourly from September 14 to September 19, 1873. . Fort Fred. Steele, Wyo. Results from observations taken hourly from October 30 to November 27, 1872. . Ogden, Utah. Results from observations taken hourly from September 26 to October 3, 1873. . Cheyenne, Wyo. Results from observations taken hourly from September 15 to October 21, 1872 AM. PIM. MM. 8 9 10 D 12 PS eaSe 6 9 10 0,12 SS = L ee — = ~~ === eee — = = = = = = SSS SSS AN. 9 on 2 Za = b®6 890 PR 22a) & 56 6901 DL ak Pat Se oon ae ae Se on . PIM. M. inches of 7,37 Phe, a arometer if = 04 . 2 ” F ‘ ' ‘ v 7 \ . ‘ ; . ' 3 f ~ F ) J @ 4a tay : , 4 a ; 3 Put rt : — oz ts I 4 - ' i . ; = i j ; B - 4 : A # . { i os + ~“e Fic. 79. Fie. 80. Fig. 81. Fig. &2. Fie. 83. Fig. 84. PLATE XX. Showing relative humidity. Georgetown, Colo. Results from observations taken hourly from June 16 to July 5, 1875. Colorado Springs, Colo. Results from observations taken hourly from July 29 to August 10, 1873. Santa Fé, N. Mex. Results from observations taken hourly from June 11 to June 20, 1873. Los Angeles, Cal. Results from observations taken hourly from June 11 to June 28, 1875. Salt Lake City, Utah. Results from observations taken hourly from July 13 to August 1, 1872. Green River Station, Wyo. Results from observations taken hourly from June 5 to June 29, 1873. VOL. METEOROLOGY U.S, GEOGRAPHICAL SURVEYS WEST OF 1007* MERTDIAN PLATE XX. M PIM. al. Thousandths | , » PIM Feed tan a: B9o0neh234567 ss0nwe i 2 3 4 5 6 7of Saturation ee: = owe pes 45 6 f so ue t 23 45 6 AThousandths 5 92 fes45 6 pe sue h2345 6 : of Saturation |*™ aye : e . . - “ 7 2 z - re ¢ ‘ H = . = = ' = \ z “y > 7 a te i : Fay 3 = [ F > ~~ ‘ * 3 . \ 5 2 . S ‘ one epee an hw Fig. 85. Fia. 86. Fic. &7. Fig. 88. Fia. 89. Fie. 90. PLATE XXI. Showing relative humidity. Camp Independence, Cal. Results from observations taken hourly from July 19 to August 9, 1871. Beaver, Utah. Results from observations taken hourly from August 8 to August 25, 1872. Hughes, Colo. Results from observations taken hourly from July 12 to July 23, 1873. Cottonwood Springs, Nev. Results from observations taken hourly from August 31 to September 74, 1871. Beaver, Utah. Results from observations taken hourly from August 30 to September 7, 1872. Labran, Colo. Results from observations taken hourly from August 12 to August 27, 1873. = MOEN METEOROLOGY, Wk Si es SURVEYS WEST OF 1007# MERIDIAN. PLATE XXL — ee =) M. P | - : j “Thousandths | hee Phe | ADE. 6 9 10 ti 2 4 See OE Saturation 8 9 10 N12 (a Se A 8 9 OW i 2 234 3 ¢ 3% = = : Soe = = SS=S5555: R20 e pes 456 7s 5D Le f 2 3 4 5 64 Thousandths 7,6 9M Diwtes4S eps sme tos 4s 6 AM. PM. sat. _| of Saturation *- et 4p. | = = ' PLATE XXII. Showing relative humidity. Fic. 91. Pioche, Nev. Results from observations taken hourly from September 27 to October 14, 1872. Fic. 92. Trinidad, Colo. Results from observations taken hourly from September 4 to September 19, 1873. Fie. 93. Cheyenne, Wyo. Results from observations taken hourly from September 15 to October 21, 1872. Fic. 94. Fort Fred. Steele, Wyo. Results from observations taken hourly from October 30 to November 15, 1872. Fic. 95. Prescott, Ariz. Results from observations taken hourly from November 1 to November 8, 1871. Fic. 96. Ogden, Ulah. Results from observations taken hourly from September 26 to October 3, 1873. VOL. METEOROLOGY. U.S. GEOGRAPHICAL SURVEYS WEST OF 1007" MERIDIAN. 6 2 == = ie == = = i 4 =e = = — = 3 ra GneonChy MAmO MOM Nem mcr Seren omG ny hnrisand tis | : of S: aturation. INDEX TO PART I—ASTRONOMY. ASTRONOMICAL STATIONS. Page. Beaver, astronomical co-ordinates of-- .. -- 71 connections and observers. --- -------- 60 corrections and rates of chronometers 65, 66 description of station and town..- ---- 59 final results of longitude. ---. -------- 66 geographical position of station .----- 58 instruments used.----- -----+----7--- 60 Jatitude determinations.--- ---- aa 67-71 meteorological conditions .--- -------- 59 tabulation of time stars ------ ------ o 61 time determinations.....------------ 61-63 _ Bozeman, astronomical co-ordinates ian 384 connections and observels..---- ------ 375 corrections and rates of chronometers 379 description of station and town------ 373 final results of longitude..--- ------ 320 geographical position .----.---------- 373 instruments used.-.---.-------------- 375 latitude determinations.----- -------- 380-384 meteorological conditions.----------- 374 tabulation of time stars..----------- 376 time determinations--.---.------------ 376-377 Cimarron, estronomical co-ordinates of- .- 415 connections and observers..---- ------ 406 corrections and rates of chronometers 411 description of stat on and town.----- 405 final results of longitude-.----- ------ 411 geographical position of station-.---- 405 latitude determinations-. .----------- 411-415 tabulation of time stars ------------- 407 time determinations..--------------- 407-409 Detroit, corrections and rate of clock ..-- 28 tabulation of time stars.------------- 9,10, 11 time determinations..--------------- 25-27 Fort Union, astroncmical cc- -ordinates of. 335 connections and obscrvers.----------- 317 corrections and rates of chronometers 328 description of post ------------------ 315 description of station ..-------------- 316 final results of longituce .----------- 329 Fort Union; geographical position.------- latitude determinations... ---- -------- latitude stars, mean places-.--.------ 2 meteorological conditions .----------- tabulation of stars used .----.-------- time determinations .---------------- Georgetown, astronomical co-ordinates of- connections and observers .----------- corrections an.l rates of chronometers description of station and town.----- final results of longitude geographical pos tion of station.----- Jatitude determinations. .---- -------- Jatitude stars, mean places.---------- tabulation of stars used ..------------ time determinations..---. ----------- Green River, astronomical co- -ordinates of - connections and observers - ---------- corrections and rates of cbronometer. description cf station and town.----- final results of longitude.------------ geographical position of station.----- instruments used at latitude determinations -.------------ latitude stars, mean places.--.------- tabulation of stars used -------------- time determinations---.------------- Gunnison, astronomical co-ordinates of. -- connections and observers .---------- corrections and rates of chronometers description of stat ion and town..---- final results of longitude..----------- geographical position of station..---- jnstruments used ati.----. ---- -------- Jatitude determinations .---~--------- tabulation of stars used.-~----------- time determinations.-...------------- Hughes, astronomical co-ordinates of.-.- - connections and observes .--- -------- corrections and rates of chronome ers 567 315 318, 319 320-325 237 215 929-230 — 213 230 213 231-237 231 216, 217 217-223 154 130 143 129 143, 144 129 129 146-154 144 130, 131 132-137 125 99 115 99 116-125 100 101-109 263 243 253, 254 568 INDEX TO PART I—ASTRONOMY. . Page. Page. Hughes, descripticn of station...-.. ..-.-- 242 | Ogden, final results of longitude .....-...- 29, 30, 48 final results of longitude.....- ..---- 254 final results of longitude, discussion of 55 geographical position of station-.----- 241 geographical position..-.-.----.---.. 7 latitude determinations. .-..-..-..--- 256-263 instruments used .---..------.--. ---- 9 latitude stars, mean places...--..---- 255 latitude determinations .-.-.-.......30-38, 49-54 tabulation of stars used.....-...-- BaS 214 tabulation of time stars--..-..----. 9,10, 11,39 telegraphic communications ---...-.--. 242 time determinations. 12-20, 40-46, 378, 379, 393- time determinations.......---------- 245-250 395, 409, 410, 424-427, 440-444 Julesburg, astroromical co-ordinates of- -- 448 | Pioche, astronomical co-ordinates of.----- 96 corrections and rates of chronometers 445 connections and observers.--.-. -.---- 76 description of station....-.-.---.----. 435 corrections and rates of chronometers &3 description of town.--.--...---------- 435 description of station at-----........ 75 final resulis of longitude. .----.-----. 445 final results of longitude...-...-..... 85 geographical position of station------ 435 geographical position of station..---.. 75 latitude determinations..---.....---- 446-448 latitude determinations...--.....-.-- 86-96 meteorological conditions ..--....---. 435 tabulation of stars used... .--.------ 77 tabulation of stars used.----. ---.---- 436 time determinations...-.....--..---- 77-82 time determinations.----...--------- 437-439 | Salt Lake City, connections and observers 465 Labran, astronomical co-ordinates of.---- 288 corrections and rates of chronometers -28, 66, 85, connections and observers.----. ------ 268 115, 143, 170, 230, 254, 279, 302, 328, 359 corrections and rates of chron. meters 279 description of instruments-.----.---- 464 description of station....-...---.---. 267 description of observatory .-.----- 461, 462, 463 final results cf longitude..----..----- 279 instrumental values -------.--------- 466, 467 geographical position of station..---. 267 meteorological conditions of.....----- 462 latitude determinations..-...----.--- 281-288 time determinations-.- -20-25, 64-65, 82-84, 109- lati:ude stars, mean places.----.----- 280 114, 138-142, 159-164, 194-196, 224-229, 250- meteorological conditions...--.------ 267, 268 253, 275-278, 298-301, 326-327 tabulation of stars used .----..------ 269 | Santa Fé, astronomical co-ordinates of. --- 369 lime determinations.---...----.----- 270-274 conrections and observers..---..----- 343 Las Vegas, astronomical co-ordinates of-- 401 corrections and rates of chronometers 359 connections and observers .-.--- ------ 389 description of station.....--.--.----- 341 corrections and rates of chronometers 395 description of town....-------.------ 340-341 description of instruments..---..---- 388 final results of longitude.--.--.-...--. 359, 360 description of station..-....---...--- 387 geographical position ...-.. .--------- 33 final results of longitude...--.-.-----. 396 instruments used..-.-..----.-.------ 342 geographical position of station------ 307 latitude determinations... ..--....---- 362-369 latitude determinations---.-.----.-.. 396-401 latitude stars, mean places.----- ----- 361 meteoro’ogical conditions---....----. 387 meteorological conditions....--.----- 341 tabulation of stars used.----.-..----- 390 tabulation of stars used.-----..------ 349, 350 time determinations...---.-.--.--- - 391-393 telegraphic communication of.-.-.. -- 347, 348 North Platte, astronomical co-ordinates of 458 time determinations....---.----.-.-- 351-858 connections and observers..---. ------ 452 | Sidney Barracks, astronomical co-ordinates corrections and rates of chronometers 455 Ofe2 ao eaee ee eee een aera 432 description of station, &c..--....---. 451 connections and observers ---- .----.- 420 final results of longitude.----.-.----- 455 correc ions and rates of chronometers 427 geographical position of station ..-..- 451 description of station...--..--...---- 419 latitude determinations....-...------ 456-452 final results of longitude ....-....--. 428 meteorological conditions.---...----- 451 geographical position of station..---- 419 tabulation of stars used..---..------- 452 latitude determinations..-.--...------ 429-432 time determinations ..---..----.----- 453, 454 meteorological conditions ..-. -------- 419 Ogden, astronomical co-ordinates of ------ 55 tabulation of stars used---.-.-------- 420 connections and observers .----. ------ 7 time determinations.....-.--..----.- 421-423 corrections and rates of chronometers. 28, 47, 48, | Trinidad, astronomical co-ordinates of---- 312 379, 395, 411, 428, 445, 455 connections and observers .-...--.---- 292 description of observatory and town .7, 469-471 corrections and rates of curonometers 202 INDEX TO PART I—ASTRONOMY. 569 ; . Page. Page. Trinidad, description of station and town. 291 | Virginia City, tabulation of stars used.... 186, 187 final results of longitude. ....-..-.-.. 302, 303 time determinations........---...... 188-193 geographical position of station.... -- 290 | Washington, correction and rate of clock. 48 latitude determinations...........-.- 304-312 tabulation of time stars ......-...-.-.- 39 mean places of latitude stars......-.. 303, 304 time determinations.......--......-.. 46, 47 meteorological conditions..---....... 291 | Winnemucca, astronomical co-ordinates of 182 tabulation of stars used.--.....-..--. 293, 294 connections and observers.----..-.-.. 157 telegraphic communications of..--.. -. 292 corrections and rates of chronometers 7 time determinations. ......-....--.-. 294-297 description of station and town..--.. 157 Virginia City, astronomical co-ordinates of 210 final results of longitude........---.- 170,171 connections and observers.......----. 185 geographical position of station ..... 157 corrections and rates of chronometers. 197 instruments used...-...----..----.-- 157 description of station........---..... 185 latitude determinations......-..-.---- 172-182 final results of longitude....-....--.. 198 latitude stars, mean places....-.-...-- 171 geographical position of station..-... 185 tabulation of stars used............-- 158 latitude determinations.............- 200-210 time determinations.......-.-...--.- 164-169 latitude stars, mean places........-.- 199 MISCELLANEOUS. Geographical positions, list of -......----. 485, 486 | Personal equation apparatus, description of 482, 483 Astronomical monuments, description of - 487 | Personal equation, determination of...... 475-482 GEOGRAPHICAL POSITIONS. JATEON® sooobe Aponte atop coeden Sebo sese Baee 489 | Wa bran se\= cae sacis fee cc enieceecivie aces esis 489 aie MOuntaMs. 2 4.-55) sasom=ece =~ ASOH | Hanae cco teccus os caeseeseeeeeeieccee 489 I DSERVE Sco poecunteebo eS Soe BoD0Ne Lees Sebe ABO | SUNG) GEERT Heceeocobess coer dbacecoanncen 489 BG ZONE anny soi alanine ects coms o=ia==t-isinin 489 | Monte Christo Mill .-.-......-.----...--- 490 (CH hs OE See Sanaa Reem SSeacee cca 489 | North Platte .-...--.......--..--.-...... 489 Wiheyenne ver wet taes ster a=: aie -12/<)aniate sine imi AGN | EWM Ozereotiongoab oboe qasoseiecra coceletoos 490 WO saree os eaciewe com eae saeese coeees A90h eRichtiel dst scccmctrs ssiaerareciceele ses ae c'lece 490 BIG MOL ace noes -aceesiceceus sacs Ads Ruby, Camphesce eis ssae nce eee eis = se 490 hiimore: (Meal) ie see eeae Sess ome abel 490) | SaintiGeorge. <<. .' 02 <.creeccecesisoacte 489 Fred! Steele, Fort..---. .--.--.---<-+----- 468490) "Salt ake City 222% 2526-2 s-jjocc.ce siecle aes 489 Garland eROUG! este ccetic cooce-ceisinelcite wei 491 | Sanders, Fort .........-- ontanceaneneacs] 491 Georzetown nese meen ines erie = dels}. || Seve J ooo case passion AoOnee CodbSU eeCE ee 489 Greonvhivenestee. «pee ensrasinccice sca 488 | Sidney Barracks.......-....---.-.<----<- 489 Gonnisoneece soe eeeise ea seats sss A86a ;SonthiPuevlo. ca eeas secs aacine cee nese 489 allecks Can peecmests acts encoanleas seis sr AIO} MRoquervilletsces caseciievece cee aceen so —= 490 Ham tony (nan) is creein esc cais cesta le ADOW rin dadene sate) sa ato ciate lise ae onl e 489 ISWRIGE -oiS5 oaocbgab oesb. CoogEHOR OSCE RES AIT} |) WW WOO tho geooacee tGce Coca ocOoReeCnes 488 Independence, Camp .----. .----...------- ASS SVAN PN a CLUY a = seis etatetecielsfeiectn lime ate cine 489 UGS DUN ae Sense tenn cnibessine ane ae BEOr NV Dip play HOltse saciaeen te Ae arama tate some tears 488 Kan aD restese et aioisjsianieise lta aeeisiecaciocia sis. AGO |S Winnemuceaeama cer ce sia sce. esse 469 INDEX TO PART II.—METEOROLOGY. MISCELLANEOUS. Page. Page. PANT DMOQCS fon mee le aiatemc ae sioeis-em ana iv stole’ s bce 556-566 | Hypsometric work, general remarks on... 519, 520 Aneroids, comparisons of.........--..---. 0) | Pinstrumentis) 2.) e - esas clans cleamene 497, 503-508 Aneroid observations, method of reduction Instrumental errors..-.......--.----.---- 497-500 Oi eaase ion end own eeine were Cen Samar 524-527 | Meteorological conditions, peculiarities of. 527,528 Atmospheric waves....-..-----.-----..-- 517-519 | Observations, discussion of method of.... 511-524 Barometers, tables of comparison of....-. 501,502 | Psychrometer, discussion of observations of 517 Comparisons, method of .........---..--. 497,498 | Reference stations, list of ..--.......----. 510, 511 Horary oscillation........-....--.-.----- 528,529 | Table of altitudes ..-....--...-----..---- 556-566 Horaryitables)s<.. 22s. s-secs cee scees se 551-554 | Temperature, variation of........--..-..-- 515-516 HOURLY OBSERVATION STATIONS. Beaveren-- o=--- Bqetasctom nena tececst seman Hos rO4 LE | MEADILANe oe aatenae «crc ele aceinieces cs cals san cus 539 @HeVeNNO! 2555. se cae ctee acces Geocnneeees BASS | Maram Gian cron soccer aeeeteen a ccisi