UC-NRLF 
 
I.IBRAIIY 
 
 <,; THK 
 . 
 
 Itnumsitu of California* 
 
 .No 
 
 Division 
 Range 
 Shelf 
 Received 
 
 e 
 
 P 
 
REPORT 
 
 UPON 
 
 THE DETERMINATION 
 
 ASTRONOMICAL CO-ORDINATES 
 
 OF 
 
 THE PRIMARY STATIONS AT CHEYENNE, WYOMING TERRITORY, AND 
 COLORADO SPRINGS, COLORADO TERRITORY, 
 
 MADE DURING 
 
 The Years 1872 and 1873, 
 
 GEOGRAPHICAL AND GEOLOGICAL EXPLORATIONS AND SURVEYS WEST OF THE 
 
 ONE HUNDREDTH MERIDIAN. 
 
 \]L . 
 
 FIRST LIEUTENANT GEORGE M. WHEELER, 
 
 CORPS OP ENGINKERS, IN CHARGE. 
 
 Dr. F. KAMPF and J. H. CLARK, 
 
 CIVILIAN ASTRONOMICAL ASSISTANTS. 
 
 WASHINGTON: 
 
 GOVERNMENT PRINTING OFFICE. 
 
 1874. 
 

 
 TABLE OF CONTENTS. 
 
 Page. 
 
 Order of sequence for an astronomical report 7 
 
 Abbreviations and signs 8 
 
 Cheyenne station .11 
 
 Description of observatory 12 
 
 Description of instruments used 13 
 
 Connections, (telegraphic) 13 
 
 Tabulation of stars used 14 
 
 Instrumental values 15 
 
 Uniform tables of time reductions at sending and receiving stations 16-27 
 
 Correction and rate of chronometers 28 
 
 Grouping of series of exchange of signals 29 
 
 Personal equation 3 
 
 Probable error 30 
 
 Resulting longitude 3 
 
 Reduction of the latitude observations 31-44 
 
 Mean places of stars used for determination of latitude 31 
 
 Observations for latitude 32-38 
 
 Computations for latitude 3Q-44 
 
 Resulting astronomical co-ordinates 45 
 
 Colorado Springs station, Colorado Territory 49 
 
 Geographical position of station 49 
 
 Physical-geography details 49 
 
 Meteorological conditions 50 
 
 Description of observatory 50 
 
 Description of instruments used 51 
 
 Points of connection 52 
 
 Tabulation of stars used for time 53 
 
 Corrections and rates of chronometers 64 
 
 Signals for determination of longitude between Salt Lake City and Colorado Springs 65-67 
 
 Final results for longitude 68 
 
 Mean places of stars for 1873 used for determination of latitude . 69 
 
 Observations for latitude 70-73 
 
 Computations for latitude 74~?6 
 
 Discussion of probable error 77-?8 
 
 Astronomical co-ordinates 78 
 
 Instructions for conducting observations, field-season of 1873 
 
OFFICE OF THE CHIEF OF ENGINEERS, 
 
 Washington, D. C., February 13, 1874. 
 
 SIR: Lieut. George M. Wheeler, Corps of Engineers, has sent to this office a 
 report embodying the results from the astronomical observations made at Cheyenne, 
 Wyoming Territory, and Colorado Springs, Colorado Territory. 
 
 As this report contains information of value to officers engaged upon explorations, 
 surveys, and reconnaissances in the western country, I have respectfully to recommend 
 that it be printed at the Government Printing-Office, and that five hundred copies be 
 furnished on requisition from this office. 
 
 Very respectfully, your obedient servant, 
 
 A. A. HUMPHREYS, 
 Brigadier- General and Chief of Engineers. 
 Hon. W. W. BELKNAP, 
 
 Secretary of War. 
 
 Approved by the Secretary of War, February 14, 1874. 
 
 H. T. CROSBY, Chief Clerk 
 
 UNITED STATES ENGINEER OFFICE, 
 
 GEOGRAPHICAL AND GEOLOGICAL EXPLORATIONS AND SURVEYS 
 
 WEST OF THE IOOTH MERIDIAN, 
 
 Washington, D. C., February g, 1874. 
 
 SIR: I have the honor to forward herewith a report embodying the results from 
 the astronomical observations made at Cheyenne, Wyoming Territory, and Colorado 
 Springs, Colorado Territory. They are typical stations for the years 1872 and 1873, 
 although not selected because of probable errors that are a minimum. 
 
 Attention is invited to the methods employed and the order of sequence in 
 reporting the results. 
 
 Uniformity of plan seems to be a matter of so great importance in the prosecu- 
 tion of astronomical work in the western interior that the one now in use is submitted 
 for consideration as a step at least in this direction. 
 
 Minor features of the methods are still to be perfected ; yet the errors of star- 
 places, from observation, and those known as instrumental, have now become reduced 
 to such small and nearly equable values, that it seems desirable that some general and 
 uniform plan should be adopted for the report at least, if not for the manner of con- 
 ducting the observations. 
 
 The present one is submitted with extreme diffidence, and will probably demand 
 certain changes in the light of future experience. 
 
 At Colorado Springs a heavy stone monument and observing-pier, with meridian- 
 marks, have been established. 
 
The same has been done at the greater number of the other points occupied as 
 main field-stations in the years 1871, 1872, and 1873. 
 
 These meridian-lines may serve various purposes in checking future surveys in 
 adjacent areas. 
 
 Very respectfully, your obedient servant, 
 
 GEO. M. WHEELER, 
 Lieutenant of Engineers, in Charge. 
 Brig. Gen. A. A. HUMPHREYS, 
 
 Chief of Engineers, United States Army. 
 
 NOTE. The results from the observations made during the field-seasons of 1871, 
 1872, and 1873, at the remaining primary stations, twenty-two in number, will appear 
 in Volume II of the Reports of the Survey, as proposed in the Annual Report of the 
 Chief of Engineers for 1878, Appendix EE. 
 
ORDER OF SEQUENCE 
 
 FOR AN 
 
 ASTRONOMICAL REPORT 
 
 AT 
 
 MAIN OR PRIMARY FIELD-STATIONS. 
 
 Longitude by Telegraph; Latitude by Zenith Telescope, (Talcotfs method.) 
 
 1. Geographical position of station. 
 
 2. Physical-geography details; especially all physical peculiarities. 
 
 3. Meteorological conditions, both general and special; the latter while observa- 
 tions were made. 
 
 4. Description of observatory; including personnel of party, name of telegraph- 
 operator, and name of telegraph-company whose wire has been employed. 
 
 5. Description of instruments used. 
 
 6. Points with which connections were made; nights of observation, and observ- 
 ers; also name of computer or computers. 
 
 7. Tabulation of stars used, and number of observations. 
 
 8. .Instrumental values; circumstances of telegraphic communication, i. e., length 
 of circuit, number of batteries, repeaters, &c. 
 
 9. Uniform tables of time-reductions at receiving-station. 
 10. Uniform tables of time-reductions at sending-station. 
 
 n. Grouping of series of exchange-signals, including means of single and serial 
 results. 
 
 1 2. Personal equation. 
 
 13. Probable error by least squares. 
 
 14. Resulting longitude. 
 
 15. Reduction of the latitude-observations properly grouped, with discussion of 
 results. 
 
 1 6. Resulting astronomical co-ordinates. 
 
ABBREVIATIONS AND SIGNS. 
 
 a, b, c, azimuth, level, and collimation corrections. 
 A, B, C, = azimuth, level, and collimation factors. 
 
 T zz observed time reduced to the mean of wires and corrected for rate. 
 T" zz observed time corrected for instrumental errors. 
 AR. zz apparent right ascension of star. 
 
 ^/o T zz resulting error of the chronometer after the mean of the wires is cor- 
 rected for rate and level. 
 -<4 T zz adopted mean error of chronometer. 
 dT = JT J T. 
 ^ T zz error of the chronometer. 
 
 v zz difference between mean final correction of chronometer and J T. 
 
REPORT 
 
 ON 
 
 ASTEONOMICAL OPEKATIONS, 
 
 CONDUCTED DUKING 
 
 THE FIELD-SEASON OF 1872, 
 
 AT THE 
 
 MAIN OR PRIMARY FIELD-STATION, CHEYENNE, WYOMING TERRITORY, 
 
 DEDUCTION OF RESULTS. 
 
 BY 
 
 DR. F. KAMPF AND J. H. CLARK, 
 
 CIVILIAN ASTRONOMICAL ASSISTANTS, 
 
UNITED STATES ENGINEER OFFICE, 
 GEOGRAPHICAL AND GEOLOGICAL EXPLORATIONS 
 
 AND SURVEYS WEST OF THE IOOTH MERIDIAN, 
 
 Washington, D. (7., January i, 1874. 
 
 CHEYENNE, WYOMING TERRITORY. 
 
 (i.) GEOGRAPHICAL POSITION OF STATION. 
 
 The station at Cheyenne, the latitude of which is N. 41 T 46". 62, and its longi- 
 tude 28'" i9 8 44 east of the Mormon observatory at Salt Lake, is situated in the western 
 part of the town, in lot 1 1, block 413, and is northwest from the junction of the branch- 
 road leading to the depot of Fort D. A. Russell with the main stem of the Union 
 Pacific Railroad. 
 
 The town of Cheyenne, on the north side of the railroad, is the capital of Wyoming 
 Territory; and besides the Union Pacific Railroad with its branch to Fort Russell, has 
 a railroad- connection with Denver, Colorado. These facilities make it a flourishing 
 place, and it possesses already, in addition to its public buildings, quite a number of 
 substantial business-houses and attractive private residences. 
 
 A fine hotel, engine-houses, workshops, and other similar improvements, are 
 among the sources of prosperity which spring directly from the railroad-company. 
 
 Besides the traffic with Fort Russell, it is the depot for Red Cloud's agency, Fort 
 Laramie, and the settlements on the North Platte, 
 
 The surrounding region affords unlimited pasturage, and cattle are said not only 
 to subsist but grow fat on it during the whole year. 
 
 Agriculturally there is but little promise outside of what may be accomplished by 
 irrigation. 
 
 (2.) PHYSICAL-GEOGRAPHY DETAILS. 
 
 The site of Cheyenne is nearly or quite level; northward, however, there is .a 
 gradual swell of the land, and within a few miles it cuts off the extensive view one is 
 accustomed to on the great plains. Eastward and southward there is the usual rolling 
 and slightly-broken prairie; but in the southwest, Long's Peak, already white this 
 September with snow, some seventy miles distant, looms up boldly above the horizon. 
 West and northwest, low mountains, many of which mark the rim of the Laramie 
 Plains, are just visible. Crow Creek, a moderate stream coming down from the foot- 
 hills of this rim, forms a valley immediately west and south of the town, working its 
 way apparently through mountain-drift, as the direct eruptive force of the Rocky 
 Mountain system seems not to have reached so far east in this latitude. 
 
 (3.) METEOROLOGICAL CONDITIONS. 
 
 The determination of this station occupied the first three weeks in the month of 
 October, 1872. There were no rains, nor any clouds, and, with the exception of two 
 or three windy nights, the elements presented no obstacle whatever to a continued 
 series of observations. In the early morning it would become cold enough to form 
 
12 
 
 ice, making it sufficiently uncomfortable to restrain the ardor of an observer from 
 extending his observations into the small hours of the night. From the experience of 
 this season, and that of many others which I have undergone in former years in 
 astronomical work, both on the plains and in the mountains, I am of the opinion that 
 the best time of the year (so far as the weather is concerned) for astronomical observa- 
 tions in the Territories and the far Western States occurs in September and October. 
 They are the months that fall between the rainy season of the summer and the stormy 
 weather of the winter. 
 
 The following table shows the direction of the wind, and the estimated force, from 
 7 a. m. to 7 p. m. and from 7 p. m. to 7 a. m. The weather was clear all the time. 
 Such an atmosphere, at an elevation of 6,000 feet, could not be otherwise than favor- 
 able for astronomical work. 
 
 Date. 
 
 General direction of wind. 
 
 Estimated force of wind. 
 
 Remarks. 
 
 7 a. m. to 7 p. m. 
 
 7 p. m. to 7 a. m. 
 
 7 a. m. to 7 p. m. 
 
 7 p. m. to 7 a. m. 
 
 1872. 
 
 
 
 
 
 
 October 5 
 
 NW. 
 
 N. 
 
 I 
 
 i 
 
 
 6 
 
 sw. 
 
 o 
 
 I 
 
 
 
 
 7 
 
 NW. 
 
 o 
 
 I 
 
 o 
 
 
 8 
 
 NE. 
 
 o 
 
 I 
 
 
 
 
 9 
 
 SE. 
 
 o 
 
 i 
 
 o 
 
 
 10 
 
 SE. 
 
 
 
 i 
 
 o 
 
 
 ii 
 
 N. 
 
 o 
 
 i 
 
 o 
 
 
 12 
 
 N. 
 
 o 
 
 i 
 
 
 
 
 13 
 
 o 
 
 o 
 
 o 
 
 o 
 
 
 14 
 
 NW. 
 
 NW. 
 
 i 
 
 I 
 
 Aurora borealis in the north 
 
 15 
 
 NW. 
 
 o 
 
 2 
 
 
 
 at 11.30 p. m. 
 
 16 
 
 NW. 
 
 o 
 
 I 
 
 o 
 
 
 17 
 
 SW. 
 
 o 
 
 I 
 
 o 
 
 Aurora borealis in the north 
 
 18 
 
 o 
 
 o 
 
 O 
 
 
 
 at 9 p. m. 
 
 19 
 
 W. 
 
 o 
 
 I 
 
 o 
 
 
 20 
 
 W. 
 
 N. 
 
 I 
 
 2 
 
 
 (4.) DESCRIPTION OF OBSERVATORY. 
 
 A large wall-tent drawn over a framework formed the observatory. The open- 
 ing for the meridian-line was furnished with a flap and curtains ; the former served to 
 protect the instrument from the weather when not in use, and the latter to keep off the 
 wind and dust while observing. Here, and at other stations previously occupied, the 
 opening for the meridian-line in the observatory was entirely unobstructed. Subse- 
 quently it was found to be an improvement to retain the ridge-pole (which commonly 
 interferes but little with the completeness of the observations) as a support against the 
 violent winds so prevalent in the country in which our operations are conducted. The 
 tent was furnished with all the appliances of a field and temporary observatory, such 
 as stools, stands, tables, and the like, and nothing was wanting as to equipment for first- 
 class field-work. The Western Union Telegraph Company furnished the line and 
 other facilities for this station. Mr. Bates, one of the operators employed at the 
 Cheyenne office, was assigned to do the telegraphing; and when business did not per- 
 
13 
 
 mit him to leave, which sometimes happened, Mr. Henderson, who was off duty at this 
 hour, was obliging enough to supply his place gratuitously. Mr. F. R. Simonton was 
 my assistant here, and kept, in conjunction with C. Herbert, an hourly meteorological 
 record, besides his other duties as assistant. 
 
 (5.) DESCRIPTION OF INSTRUMENTS USED. 
 (a.) Transit. 
 
 The transit used was the meridian-zenith-instrument No. 28, made by Wiirde- 
 mann, a description of which is given in Dr. Kampf's report, and it was mounted on a 
 large block of wood. The instrumental values are, for one division of the micrometer- 
 screw, o". 621 6; of the striding-level A, i".2i; and of the zenith-level, i".io. 
 
 (I.} Chronograph. 
 
 The record of the observations for time, as well as the exchange of signals, with 
 one exception (the night of the Hth), was made by means of the chronograph, of the 
 form contrived by Professor Harkness, United States Naval Observatory. It consists 
 of clock- woi'k driven by a weight, and can be adjusted to run some two hours. The 
 regulation of the movement is effected by a steel spring, with movable balances, strik- 
 ing on a fly-wheel. A cylinder is attached, covered with paper, and is made to revolve 
 once a minute. Along this cylinder a screw carries a pen, which, being in the same 
 circuit with the chronometer, records its breaks. The chronometric breaks are made 
 every second, except the sixtieth, which is omitted, to mark the minute. Removing the 
 paper from the cylinder, both the minutes and the seconds will be found, if the instru- 
 ment is working properly, recorded in parallel lines, and the culminations of the stars 
 observed, distinctly marked by arbitrary breaks, and easily read off. 
 
 (c.) Chronometer. 
 
 The chronometer in use here was the Negus break-circuit No. 1499. It had a 
 gaining-rate, +0.054, hourly average, at a mean temperature of 50. The break- 
 arrangement got out of order once, but it was readily repaired, and ran the rest of the 
 season without giving any trouble. 
 
 (<i) Battery. 
 
 A local circuit of sufficient force was produced by two cups of zinc and copper, 
 a form known, I believe, among electricians as the Hill battery. It is simple, works a 
 week or more without renewal, and the only possible objection to it for the purpose to 
 which we apply it is that the sulphate is a little slow to act, particularly in cold 
 weather. 
 
 (6.) CONNECTIONS. 
 
 The observatory was west of the telegraph-office, and the main connection was 
 effected by a loop into one of the main overland wires and put in communication with 
 Salt Lake by a switch at Ogden. The local connections, including the chronometer, 
 the chronograph, and the observing-keys, were made by means of a switch-board, 
 which also received the main circuit. The various wires being put in their proper 
 
14 
 
 posts on this board, and the circuit closed, it required only the simple movement of 
 sliding a switch-button to cut off or put on either circuit, and thus send the chrono- 
 metric break, or receive that of the connected station on the chronographic sheet, as 
 desired. The nights of the ist, 3d, 8th, gth, loth, nth, and 12th were occupied on 
 latitude, in which time 257 results were obtained. The 5th, i4th, i6th, i8th, igth, and 
 2 1 st were successively put in on longitude. There were several other evenings when 
 efforts were made in this direction, but failed from causes beyond my control. Mr. 
 Austin did the observing at Salt Lake, while the observations at Cheyenne were made 
 by myself, and also the longitude reductions for both stations. Prof. W. A. Rogers, 
 of Harvard College Observatory, computed the latitude-observations, and they were 
 subsequently revised, partially recomputed, and formulated by Dr. Kampf. 
 
 (7.) TABULATION OF STARS USED. 
 
 Tabulation of Stars Used for Determination of Time at Cheyenne, Wyoming Territory, aitd 
 
 Salt Lake City, Utah Territory. 
 
 Name of Star. 
 
 T Aquilze 
 
 ii Aquilie ..... 
 a a Capricorni . 
 K Cephet ..... 
 T Capricorn! , . . . 
 c Delphrn? 
 
 Groombridge 3241 . 
 a Cygni .,,... 
 
 ft Aquarii 
 
 v Cygni ...... 
 
 1 2- Year Catalogue 187.9 
 a s Ursse Majoris, L, C' 
 
 61 Cygni 
 
 f Cygni 
 
 a Cephei , 
 
 I Pegasi . 
 
 I Draconis, L. C, . 
 
 /} Aquarii 
 
 /? Cephei 
 
 .- Aquarii 
 
 Pegasi 
 
 ii Cephei 
 
 p Capricorn! . . . . 
 
 79 Draconis 
 
 a Aquarii 
 
 32 Ursae Majoris, L. C. 
 
 Aquarii 
 
 T Aquarii 
 
 9 Draconis, L. C. . 
 
 Mean Right 
 Ascension,-iS72.o. 
 
 h. 
 
 19 
 20 
 
 m. 
 
 57 
 
 4 
 
 10 
 
 13 
 19 
 
 27 
 30 
 37 
 45 
 52 
 53 
 59 
 I 
 
 7 
 15 
 16 
 18 
 24 
 26 
 3 
 37 
 40 
 46 
 51 
 59 
 
 8 
 
 10 
 18 
 24 
 
 s. 
 53-20 
 
 41.98 
 57-04 
 
 9-32 
 59-54 
 
 5-82' 
 32.52 
 
 4.10 
 44.86 
 24.08 
 19.06 
 
 5-92 
 
 9.67 
 
 29-33 
 31-39 
 10.09 
 
 38.59 
 49.16 
 59.96 
 56.16 
 
 53-98 
 
 2.36 
 
 18.94 
 
 16.44 
 
 12.53 
 
 42.70 
 
 4.68 
 
 44-37 
 9.11 
 
 Declination. 
 
 + 6 
 
 I 
 
 12 
 
 + 77 
 
 - 18 
 + 10 
 + 72 
 + 44 
 
 - 9 
 + 40 
 + 80 
 + 67 
 + 3 
 + 29 
 + 62 
 
 + '9 
 
 + 81 
 
 - 6 
 + 69 
 
 - 8 
 
 + 9 
 + 70 
 - M 
 + 73 
 
 o 
 + 65 
 
 - .8 
 + o 
 + 76 
 
 55-1 
 
 12.0 
 56.4 
 19.5 
 
 37-7 
 52.2 
 
 5-9 
 49-4 
 
 27.7 
 40.5 
 
 4-2 
 39-1 
 
 7-3 
 42.. 
 
 2.6 
 15-5 
 53-3 
 
 8.0 
 
 59-9 
 25.6 
 17.4 
 
 43-3 
 9.2 
 5-8 
 
 56.4 
 
 44-7 
 25.2 
 
 43-7 
 22.3 
 
 October 
 
 5. 14. 16. 18. 19. 21. 
 
 October 
 
 5. 14. 16. 18. 19. 21 
 
15 
 
 Tabulation of Stars used for Determination of Time, &c. Continued. 
 
 Name of Star. 
 
 ?/ Aquarii .... 
 226 Cephci .... 
 
 C Pegasi .... 
 
 v Cephci .... 
 
 /I Aquarii .... 
 
 a Piscis Australis . 
 
 a Pegasi .... 
 
 o Cephci .... 
 
 6 Piscium .... 
 
 /I Draconis, L.C. . 
 
 t Piscium .... 
 
 y Cephei .... 
 Groombridge 4163 . 
 
 u Piscium .... 
 
 a Andromedse . 
 
 4 Draconis, L.C. . 
 
 y Pegasi .... 
 
 a Cassiopeix . 
 
 (3 Ceti 
 
 21 Cassiopeiae . 
 
 32 Camelopardalis, L. C. 
 
 c Piscium .... 
 
 6' Ceti 
 
 38 Cassiopeiae 
 
 jj Piscium .... 
 
 o Piscium .... 
 
 Mean Right 
 Ascension, 1872.0. 
 
 h. m. 
 22 28 
 
 30 
 35 
 45 
 45 
 50 
 5* 
 13 
 21 
 
 23 
 33 
 34 
 
 48 
 
 52 
 
 i 
 6 
 6 
 
 33 
 37 
 37 
 48 
 56 
 
 1 17 
 21 
 
 24 
 38 
 
 S. 
 46.69 
 
 i.og 
 
 4-65 
 
 7.64 
 56.08 
 34-39 
 23.15 
 22.74 
 28.50 
 46.64 
 22.07 
 
 6.60 
 37-77 
 44-30 
 46.47 
 10.66 
 33.78 
 15.41 
 
 9-77 
 14-03 
 12.72 
 18.10 
 37-54 
 44-35 
 38.13 
 38.23 
 
 Declination. 
 
 o 
 
 + 75 
 
 + 10 
 
 + 65 
 
 - 8 
 
 - 30 
 + 14 
 + 67 
 + 5 
 + 70 
 + 4 
 + 76 
 -4- 73 
 + 6 
 + 28 
 + 78 
 + M 
 + 55 
 
 - 18 
 + 74 
 + 84 
 + 7 
 
 - & 
 + 69 
 + '4 
 
 46.6 
 34-0 
 9.8 
 3L6 
 15.6 
 18.0 
 31.0 
 
 24.7 
 
 40.6 
 
 2.2 
 
 56.0 
 
 55-t 
 41.9 
 
 9-3 
 23.0 
 19.6 
 28.3 
 50.1 
 41.4 
 17.2 
 
 6-5 
 
 12. 
 
 50.7 
 36.3 
 4I.I 
 30.8 
 
 October 
 
 5. 14. 16. 18. 19. 21 
 
 October 
 
 5. 14. 16. 18. 19. 21 
 
 (8.) INSTRUMENTAL VALUES. 
 
 The values of the implements pertaining to zenith-instrument No. 28 are, for one 
 division of the micrometer-screw, o".622; of the striding-level A, i".2i; and of the 
 zenith-level, i". 10. The wire which made the circuit between the stations Salt Lake 
 and Cheyenne, counting the distance along the railroad, is some 550 miles, and does 
 not include any battery or repeating-office. At Cheyenne there was a repeating-office ; 
 but as the observatory, as elsewhere stated, was situated west of it, the signals did not 
 work through any repeater; and at the time these observations were made Salt Lake 
 itself was only a relay-office ; but there was a switch at Ogden, which had always to be 
 called to "straighten" the wire before the work of exchanging could be commenced. 
 Powerful batteries have always been kept at both places, and lately the repeating-office 
 at Corinne has been removed to Salt Lake, and the latter has not only become a re- 
 peating-office but also the headquarters of the western division of the main or eastern 
 branch of the company. 
 
16 
 (9-) UNIFORM TABLES OF TIME-REDUCTIONS AT RECEIVING-STATION. 
 
 SALT LAKE OBSERVATORY, October 5, 1872. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 <5B 
 
 aA. 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 S. 
 
 h. m. s. 
 
 h. m. s. 
 
 m. s. 
 
 r Aquilae 
 
 W. 
 
 20 o 5.28 
 
 - 0.04 
 
 o. 10 
 
 0.07 
 
 20 o 5.07 
 
 19 57 54.80 
 
 2 10.27 
 
 ic Cephei .... 
 
 
 
 15 19-82 
 
 0.62 
 
 + 0.49 
 
 0.31 
 
 15 19-38 
 
 20 13 9.66 
 
 [9.72] 
 
 tf Capricorn! . 
 
 . 
 
 22 12. 2O 
 
 0.13 
 
 0.16 
 
 0.07 
 
 22 11.84 
 
 20 1.58 
 
 10.26 
 
 Delphini 
 
 
 2Q 18.22 
 
 O.20 
 
 0.09 
 
 0.07 
 
 29 17.86 
 
 27 7-54 
 
 10.32 
 
 a Cygni .... 
 
 E. 
 
 39 16.20 
 
 0.18 
 
 O.02 
 
 0.09 
 
 39 15-91 
 
 37 5-57 
 
 10-34 
 
 " Aquarii 
 
 
 47 57.56 
 
 O.I2 
 
 0.14 
 
 + 0.07 
 
 47 57-37 
 
 45 46-89 
 
 10.48 
 
 12- Year Cat. 1879. 
 
 . 
 
 55 3I.I4 
 
 1.03 
 
 + 0.66 
 
 + 0.40 
 
 55 31-17 
 
 53 20.37 
 
 10.80 
 
 61 Cygni .... 
 
 . 
 
 21 3 22.20 
 
 - 0.35 
 
 O.OI 
 
 + 0.07 
 
 21 3 21.91 
 
 21 I 11.63 
 
 10.28 
 
 f Cygni .... 
 
 
 9 41.76 
 
 - 0.31 
 
 - 0.04 
 
 + O.II 
 
 9 41.52 
 
 7 31.1 
 
 10.42 
 
 Mean, exclusive of K Cephei, at 2O h 30 local sidereal time 
 
 2 IO TO 
 
 
 iv -jy 
 
 Normal Equations. 
 
 9<J/ 3-24+ O.l8f= 2.22 rt=-O.l8 
 
 3.24 fit + 22. 91 a io.2<)c 3.72 c = + 0.07 
 
 o. 1 8 St 10.29 " + 63.461:= + 0.60 <!/= 0.31 
 
 SALT LAKE OBSERVATORY, October 5, 1872. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 <5B 
 
 <rA 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 m. s. 
 
 o Cephei .... 
 
 E. 
 
 23 15 37.08 
 
 - 0.44 
 
 + 0.31 
 
 - 0.35 
 
 23 15 36.60 
 
 23 13 26.08 
 
 2 10.52 
 
 8 Piscium 
 
 
 23 41.72 
 
 - 0.17 
 
 - 0.15 
 
 - 0.17 
 
 23 41.23 
 
 21 30.96 
 
 10.27 
 
 ( Piscium 
 
 \V. 
 
 35 35-20 
 
 0.36 
 
 0.16 
 
 + 0.17 
 
 35 34-85 
 
 33 24-59 
 
 10.26 
 
 Groombridge 4163 
 
 . 
 
 50 52.16 
 
 0.60 
 
 + 0.52 
 
 4- 0.61 
 
 50 52.69 
 
 48 42.32 
 
 10-37 
 
 u Piscium 
 
 . 
 
 54 57-66 
 
 0.19 
 
 - 0.15 
 
 -f 0.17 
 
 54 57-49 
 
 52 46.90 
 
 10.59 
 
 o Andromedae . 
 
 . 
 
 24 3 59-66 
 
 0.19 
 
 0.06 
 
 4- 0.19 
 
 24 3 59.60 
 
 24 I 49.06 
 
 10.54 
 
 7 Pegasi .... 
 
 
 8 52.00 
 
 0.16 
 
 O.I2 
 
 + 0.18 
 
 8 51.90 
 
 6 41-33 
 
 10.57 
 
 
 2 lO.dl 
 
 
 A *J 1 4-f 
 
 Normal Equations. 
 
 Tit 0.650 4.i3c= 2.06 0^0.27 
 
 o.65<S/ + 6.35a+ 2.54<:= 1.96 <:= 0.17 
 
 4. 13 <V+ 2.54 + 24.83 c 3.17 6t = 0.43 
 
17 
 UNIFORM TABLES OF TIME-REDUCTIONS AT RECEIVING-STATION Continued. 
 
 SALT LAKE OBSERVATORY, October 14, 1872. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 *B 
 
 aA. 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 m. s. 
 
 r Aquilx. 
 
 E. 
 
 20 o 17.86 
 
 0.08 
 
 0.14 
 
 O.IO 
 
 20 17.54 
 
 19 57 54.66 
 
 - 2 22.88 
 
 8 Aquilsc .... 
 
 
 7 6.86 
 
 0.06 
 
 - 0.17 
 
 - O.IO 
 
 7 6-53 
 
 20 4 43.55 
 
 22.98 
 
 K Cephei .... 
 
 
 15 31.66 
 
 0.25 
 
 + 0.68 
 
 - 0.46 
 
 15 31-63 
 
 13 8.71 
 
 22.92 
 
 TT Capricorn!. 
 
 
 22 24.56 
 
 0.03 
 
 0.23 
 
 O.II 
 
 22 24.19 
 
 20 I . 44 
 
 22.75 
 
 e Delphini 
 
 
 29 30.56 
 
 0.05 
 
 - 0.13 
 
 O.IO 
 
 29 3O.28 
 
 27 7.40 
 
 22.88 
 
 Groombridge 3241 
 
 
 32 55-78 
 
 0.16 
 
 + 0.42 
 
 - 0.33 
 
 32 55-71 
 
 30 32.87 
 
 22.84 
 
 a Cygni .... 
 
 W. 
 
 39 28.28 
 
 0.09 
 
 + 0.02 
 
 + 0.14 
 
 39 28.35 
 
 37 5-34 
 
 23.00 
 
 fi Aquarii 
 
 . 
 
 48 9.96 
 
 0.04 
 
 0.2o 
 
 + O.IO 
 
 48 9.82 
 
 45 46.76 
 
 23.06 
 
 12-Year Cat. 1879. 
 
 . 
 
 55 40.70 
 
 - 0.13 
 
 + 0.92 
 
 + 0.58 
 
 55 42.07 
 
 53 I9-25 
 
 22.82 
 
 61 Cygni .... 
 
 
 21 3 34-30 
 
 -t- O.OI 
 
 O.O2 
 
 + 0.13 
 
 21 3 34-42 
 
 21 I 11.45 
 
 22.97 
 
 C Cygni .... 
 
 . 
 
 9 54.05 
 
 0.03 
 
 O.O6 
 
 + O.I2 
 
 9 54-oS 
 
 7 30.95 
 
 23.13 
 
 
 2 22.93 
 
 
 
 Normal Equations. 
 
 IK!/ 4.46(1+ i.25<r= + l.73 a 0.250 
 
 4.46^ + 26.19^ + 5.211::= 7.89 c = 0.096 
 
 i.25<!/ + 5.2in + 75.02c= - 8.35 &t = +0.070 
 
 SALT LAKE OBSERVATORY, October 14, 1872. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 6B 
 
 aA 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 m. s. 
 
 8 Aquarii. 
 
 W. 
 
 22 12 30.22 
 
 0.05 
 
 - 0.07 
 
 + O.OI 
 
 22 12 30.11 
 
 22 10 6.97 
 
 - 2 23.14 
 
 5r Aquarii. 
 
 . 
 
 21 9.88 
 
 0.04 
 
 0.06 
 
 + O.OI 
 
 21 9.79 
 
 18 46.61 
 
 23-18 
 
 9 Draconis, L. C. . 
 
 
 26 32.45 
 
 + 0.04 
 
 - 0.34 
 
 0.04 
 
 26 32.11 
 
 24 9.00 
 
 23.11 
 
 f Pegasi .... 
 
 
 37 30.27 
 
 0.05 
 
 0.05 
 
 + O.OI 
 
 37 30.18 
 
 35 6.88 
 
 23.30 
 
 o Cephei .... 
 
 E. 
 
 23 15 49.05 
 
 0.23 
 
 + O.II 
 
 0.03 
 
 23 15 48.90 
 
 23 13 25.87 
 
 23.03 
 
 8 Piscium 
 
 . 
 
 23 54-24 
 
 0.08 
 
 0.05 
 
 O.OI 
 
 23 54-10 
 
 21 30.92 
 
 23.18 
 
 ( Piscium 
 
 
 
 35 57.97 
 
 0.08 
 
 0.05 
 
 O.OI 
 
 35 57.83 
 
 33 34-57 
 
 23.26 
 
 Mean at 23 b local sidereal time 
 
 2 23.17 
 
 
 
 Normal Equations. 
 
 7 it + 5.680 5.79*-= 1.78 = 0.09 
 
 5. 68 St +17. 39 a Il.g8<r= 2.72 c = +0.01 
 
 5.791!; 1 1.98 a + 29.56 c + 1.70 St= O.I 8 
 
18 
 
 (9.) UNIFORM TABLES OF TIME-REDUCTIONS AT RECEIVING-STATION Continued. 
 
 SALT LAKE OBSERVATORY, October 16, 1872. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 t>B 
 
 A 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 m. s. 
 
 v Capricorni . . 
 
 W. 
 
 20 22 27.72 
 
 0.04 
 
 + 0.16 
 
 
 
 20 22 27.84 
 
 20 20 1.41 
 
 2 26.43 
 
 e Delphini . 
 
 . 
 
 29 33.61 
 
 0.09 
 
 + 0.09 
 
 
 29 33.61 
 
 27 7-37 
 
 26.24 
 
 Groombridge 3241 
 
 . 
 
 32 59-45 
 
 0.28 
 
 0.30 
 
 . 
 
 32 58.87 
 
 30 32.72 
 
 26.15 
 
 a Cygni .... 
 
 . 
 
 39 31-84 
 
 0.25 
 
 O.O2 
 
 . 
 
 39 31-57 
 
 37 5-29 
 
 26.28 
 
 " A q n. mi. 
 
 . 
 
 48 13.16 
 
 - 0.13 
 
 + 0.14 
 
 
 48 13-17 
 
 45 46-74 
 
 26.43 
 
 12-Year Cat., 1879 
 
 E. 
 
 55 47-17 
 
 - 0.99 
 
 - 0.66 
 
 . 
 
 55 45-52 
 
 53 18.99 
 
 26.53 
 
 61 Cygni .... 
 
 
 21 3 37.78 
 
 0.09 
 
 + O.OI 
 
 . 
 
 21 3 37.70 
 
 21 I 11.41 
 
 26.29 
 
 C Cygni .... 
 
 . 
 
 9 57-05 
 
 o.oS 
 
 -t- 0.04 
 
 . . 
 
 9 57-01 
 
 7 30.92 
 
 26.O6 
 
 a Cephei .... 
 
 . 
 
 17 59-12 
 
 + O.O2 
 
 - 0.14 
 
 . 
 
 17 59-oo 
 
 15 32.72 
 
 26.28 
 
 /} Aquarii. 
 
 . 
 
 27 17.73 
 
 -+- 0.01 
 
 + 0.13 
 
 . 
 
 27 17-87 
 
 24 51.19 
 
 26.68 
 
 ft Cephei .... 
 
 . 
 
 29 27.95 
 
 + 0.03 
 
 0.26 
 
 
 29 27.72 
 
 27 i-34 
 
 26.38 
 
 f Aquarii. 
 
 . 
 
 33 24.70 
 
 + O.OI 
 
 + 0.13 
 
 . 
 
 33 24.84 
 
 30 58.26 
 
 26.58 
 
 c Pegasi .... 
 
 
 
 40 22.32 
 
 + O.OI 
 
 + 0.09 
 
 
 
 40 22.42 
 
 37 55 92 
 
 26.50 
 
 
 2 26 T7 
 
 
 * ** j 1 
 
 Normal Equations. 
 
 13^+ 3-i5 + 3-05-- 5-43 a= 0.18 
 
 3. 15<5/ + 20.33*1 + 21.20*-= 4.81 <r = o.oo 
 
 3.05^+ 21. 20 a +- 68.43 c = 4-S3 <!/= 0.37 
 
 SALT LAKE OBSERVATORY, October 16, 1872. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 fB 
 
 A 
 
 <rC 
 
 T 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 m. s. 
 
 y Cephei .... 
 
 W. 
 
 23 36 37-9 
 
 + 0.50 
 
 - 0.39 
 
 + O.22 
 
 23 36 38.23 
 
 23 34 11.24 
 
 2 26.99 
 
 Groombridge 4163 
 
 . 
 
 51 7-68 
 
 + 0.45 
 
 0.29 
 
 + 0.18 
 
 51 8.02 
 
 48 42.09 
 
 25-93 
 
 u Piscium 
 
 
 54 13.17 
 
 -1- 0.12 
 
 + 0.09 
 
 + 0.05 
 
 54 13-43 
 
 52 46.89 
 
 26.54 
 
 a Andromeda: . 
 
 . 
 
 24 4 15.36 
 
 + 0.18 
 
 + 0.04 
 
 + 0.06 
 
 24 4 15.64 
 
 24 I 49.05 
 
 26.59 
 
 y Pegasi .... 
 
 . 
 
 9 7.67 
 
 + 0.18 + 0.07 
 
 + 0.05 
 
 9 7-97 
 
 6 41-33 
 
 26.64 
 
 
 - 2 26.54 
 
 
 
 Normal Equations. 
 
 5<1/ + 3.263= 3.17 a= 0.15 
 
 3.26d/+ n.o7 = 3.36 St=. 0.54 
 
19 
 (9.) UNIFORM TABLES OF TIME-REDUCTIONS AT RECEIVING-STATION Continued. 
 
 SALT LAKE OBSERVATORY, October 18, 1872. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 b'B 
 
 aA. 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h, m. s. 
 
 s. 
 
 s. 
 
 S. 
 
 h. m. s. 
 
 h. m. s. 
 
 m. s. 
 
 Groombridgc 3241 
 
 W. 
 
 20 33 3.31 
 
 - 0.31 
 
 + 0.08 
 
 - 0.39 
 
 20 33 2.69 
 
 20 30 32.58 
 
 2 30.11 
 
 a. Cygni .... 
 
 
 39 35-44 
 
 - 0.15 
 
 -r O.OI 
 
 - 0.17 
 
 39 35-13 
 
 37 5-23 
 
 29.90 
 
 fi Aquarii. 
 
 . 
 
 48 17.04 
 
 0.06 
 
 - O.O4 
 
 O.I2 
 
 48 16.82 
 
 45 46.70 
 
 30.12 
 
 12-Year Cat., 1879 
 
 
 55 49-47 
 
 0.36 
 
 + o.iS 
 
 0.69 
 
 55 48.60 
 
 53 18.73 
 
 29.87 
 
 61 Cygni .... 
 
 
 21 3 41.48 
 
 0.09 
 
 o.oo 
 
 - 0.15 
 
 21 3 41.24 
 
 21 I 11-37 
 
 29.87 
 
 C Cygni .... 
 
 E. 
 
 10 0.63 
 
 0.08 
 
 O.OI 
 
 + o. 14 
 
 10 0.68 
 
 7 30.88 
 
 29.80 
 
 <i Cephei .... 
 
 
 IS 2.16 
 
 0.07 
 
 + 0.04 
 
 + 0.25 
 
 18 2.38 
 
 *5 32-64 
 
 29-74 
 
 ft Aquarii. 
 
 
 27 20.95 
 
 0.03 
 
 0.04 
 
 + 0.12 
 
 27 21. OO 
 
 24 5I-I7 
 
 29.83 
 
 f Aquarii. 
 
 
 33 28.01 
 
 T o.oo 
 
 0.04 
 
 + O.I2 
 
 33 28.09 
 
 30 58-24 
 
 29.85 
 
 e Pegasi .... 
 
 
 40 25.72 
 
 T o.oo 
 
 0.03 
 
 + O.I2 
 
 40 25.81 
 
 37 55-9 
 
 29.91 
 
 Mean at 2i h local sidereal time 
 
 2 2Q . OO 
 
 
 V y 
 
 Normal liquations. 
 
 ioSt+ 3.140 6.43^- = + 0.48 ^=+0.05 
 
 3. 14 <5/ + 18.99 a 26.7l<r= 1.81 <r= +0.12 
 
 6.43 St 26.713+ 59.95 c + 5.86 St = + O.II 
 
 SALT LAK'E OBSERVATORY, October 18, 1872. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 i~B 
 
 aA 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 m. s. 
 
 Aquarii. . . . 
 
 E. 
 
 23 10 13.91 
 
 0.07 
 
 0.32 
 
 + O.OI 
 
 23 10 13.53 
 
 23 7 44.11 
 
 2 29.42 
 
 a Cephei .... 
 
 
 
 15 54-99 
 
 - 0.14 
 
 + 0.50 
 
 + 0.03 
 
 15 55.38 
 
 13 25-76 
 
 29.62 
 
 8 Piscium ... 
 
 
 24 0.92 
 
 + 0.01 
 
 - 0.24 
 
 + O.OI 
 
 24 o. 70 
 
 21 30.90 
 
 29.80 
 
 ( Piscium 
 
 W. 
 
 35 54-53 
 
 0.04 
 
 0.25 
 
 O.OI 
 
 35 54-23 
 
 33 24.56 
 
 29.67 
 
 y Cephei .... 
 
 
 36 39-85 
 
 0.18 
 
 + 1. 12 
 
 0.65 
 
 36 40.74 
 
 34 ".14 
 
 29.60 
 
 Mean at 24'' local sidereal time 
 
 2 29.62 
 
 
 
 Normal Equations* 
 
 5 St 1.853 o.78<r= + 2.6g a =0.43 
 
 1.85^ + 9.36(1+ 9.19^= 4.66 c= +0.013 
 
 0.78* + 9. 19 a + 29.27 c = 3.93 fit +0.38 
 
20 
 (9.) UNIFORM TABLES OF TIME-REDUCTIONS AT RECEIVING-STATION Continued. 
 
 SALT LAKE OBSERVATORY, October 19, 1872. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 tB 
 
 A 
 
 <rC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 m. s. 
 
 e Delphini . . . 
 
 E. 
 
 20 29 38.95 
 
 0.14 
 
 0.06 
 
 + 0.06 
 
 20 29 38.81 
 
 20 27 7.32 
 
 - 2 31.49 
 
 Groombridge 3241 
 
 
 33 4-49 
 
 0.42 
 
 + O.20 
 
 + 0.19 
 
 33 4-46 
 
 30 32.50 
 
 31.96 
 
 a Cygni .... 
 
 . 
 
 39 36-84 
 
 0.20 
 
 + O.OI 
 
 + 0.08 
 
 39 36.7t 
 
 37 5.2i 
 
 3I-50 
 
 ," Aquarii 
 
 . 
 
 48 18.51 
 
 0.06 
 
 0.09 
 
 + 0.06 
 
 48 18.42 
 
 45 46.69 
 
 31-73 
 
 12- Year Cat., 1879 
 
 
 55 49-03 
 
 0.36 
 
 + 0.44 
 
 + 0.35 
 
 55 50.06 
 
 53 18.60 
 
 31.46 
 
 f Cygni .... 
 
 W. 
 
 21 10 2.41 
 
 O.O5 
 
 O.O2 
 
 0.07 
 
 21 10 2.27 
 
 21 7 30.86 
 
 3L4I 
 
 a Cephei .... 
 
 . 
 
 18 3.66 
 
 O.I2 
 
 + 0.09 
 
 - 0.13 
 
 18 3.50 
 
 15 32.60 
 
 30.90 
 
 fi Cephei .... 
 
 . 
 
 29 32-33 
 
 - 0.15 
 
 + 0.17 
 
 - 0.17 
 
 29 32.18 
 
 27 1-17 
 
 3I.OI 
 
 f Aquarii. . . 
 
 . 
 
 33 29.86 
 
 0.05 
 
 0.09 
 
 0.06 
 
 33 29.66 
 
 30 58.22 
 
 31-44 
 
 e Pegasi .... 
 
 
 40 27.34 
 
 O.Og 
 
 0.06 
 
 0.06 
 
 40 27.13 
 
 37 55-88 
 
 31.25 
 
 ft Capricorn!. 
 
 
 
 48 52.77 
 
 O.O6 
 
 O.IO 
 
 0.06 
 
 48 52.55 46 21. 16 
 
 31-39 
 
 
 2 11.41 
 
 
 * J * t* 
 
 Normal Equations. 
 
 uSt 4.oia+ 3.24,:=: 3.98 n= 0.120 
 
 4.01 8t+ 21.89 22.23^= 2. 15 c +0.066 
 
 + 3.24<M 22. 23 a + 35. 45 f = + 3.38 St= 0.41 
 
 SALT LAKE OBSERVATORY, October 19, 1872. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 6B 
 
 A 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 m. s. 
 
 226 Cephei .... 
 
 E. 
 
 22 32 34.43 
 
 0.03 
 
 + 0.82 
 
 + O.2O 
 
 22 32 35.42 
 
 22 30 3.77 
 
 2 31.65 
 
 f Pegasi .... 
 
 . 
 
 37 38-63 
 
 O.OI 
 
 0.08 
 
 4- 0.06 
 
 37 38.60 
 
 35 6.83 
 
 31-77 
 
 i Cephei .... 
 
 . 
 
 47 41-35 
 
 o.oo 
 
 + 0.32 
 
 + O.II 
 
 47 4I-78 
 
 45 10.12 
 
 31.66 
 
 A Aquarii . . . 
 
 . 
 
 48 30.22 
 
 o.oo 
 
 0.28 
 
 + 0.05 
 
 48 29.99 
 
 45 58.46 
 
 31-53 
 
 a Pegasi . . . . 
 
 . 
 
 23 o 57.20 
 
 o.oo 
 
 0.16 
 
 + 0.05 
 
 23 o 5 7.. 09 
 
 58 25.42 
 
 31-67 
 
 o Cephei .... 
 
 W. 
 
 15 56. 85 
 
 o.oo 
 
 4- 0.42 
 
 0.13 
 
 15 57-15 
 
 23 13 25.73 
 
 3L42 
 
 
 2 31.62 
 
 
 
 Nortnal Equations. 
 
 (>6t 2.89 a= 2.65 a 0.359 
 
 2, 8g(!/+ 8.630= 1.36 <tt= 0.620 
 
21 
 
 (9.) UNIFORM TABLES OP TIME-REDUCTIONS AT RECEIVING-STATION Continued. 
 
 SALT LAKE OBSERVATORY, October 21, 1872. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 jB 
 
 A 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 m. s. 
 
 61 Cygni .... 
 
 W. 
 
 21 3 46.07 
 
 O.IO 
 
 + 0.69 
 
 + 0.09 
 
 21 3 45-75 
 
 21 I 11.31 
 
 2 35.44 
 
 f Cygni .... 
 
 
 10 3.65 
 
 O.II 
 
 + 2.54 
 
 + 0.08 
 
 10 6.16 
 
 7 30-83 
 
 35-33 
 
 a Cephei .... 
 
 . 
 
 18 16.62 
 
 - 0.24 
 
 8.90 
 
 + 0.15 
 
 IS 7.63 
 
 15 32-52 
 
 35-n 
 
 ft Aquarii . . . 
 
 
 27 17.99 
 
 0.08 
 
 + 8.44 
 
 + 0.07 
 
 27 26.42 
 
 24 51-13 
 
 35-29 
 
 ft Cephei .... 
 
 E. 
 
 29 53.21 
 
 - 0.31 
 
 -16.53 
 
 O.20 
 
 29 36.17 
 
 27 1-05 
 
 35-12 
 
 Aquarii 
 
 
 33 24-95 
 
 0.08 
 
 + 8.79 
 
 0.07 
 
 33 33-59 
 
 30 58.20 
 
 35-39 
 
 c Pegasi .... 
 
 
 40 25.25 
 
 0.08 
 
 + 6.13 
 
 O.O7 
 
 40 31.23 
 
 37 55-86 
 
 35-37 
 
 IT Cephei .... 
 
 
 42 56.94 
 
 0.18 
 
 -17.46 
 
 O.2I 
 
 42 39.09 
 
 40 3.72 
 
 35-37 
 
 o Aquarii . . 
 
 
 22 I 42.61 
 
 0.07 
 
 + 7-75 
 
 0.07 
 
 22 I 5O.22 
 
 59 14-62 
 
 35-6o 
 
 
 2 35.34 
 
 
 
 Normal Equations. 
 
 9(^ + 0.740 + 3.42C 11.86 a = 11.560 
 
 o.74(5/ + 6.8o<z + 6.2O<r=: 78.82 <r = 0.072 
 
 3.42e!/ + 6.2o<z + 2g.22<r = 74.90 rf/= 0.370 
 
 SALT LAKE OBSERVATORY, October 21, 1872. 
 
 Name of Star. 
 
 Clamp. 
 
 T. 
 
 B 
 
 aA. 
 
 eC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 m. s. 
 
 <z Pegasi .... 
 
 E. 
 
 23 o 55.95 
 
 0.19 
 
 + 5-28 
 
 - 0.13 
 
 23 I 0.91 
 
 22 58 25.41 
 
 - 2 35.50 
 
 t Piscium 
 
 . 
 
 35 53.36 
 
 0.09 
 
 + 6.92 
 
 O.I2 
 
 36 0.07 
 
 23 33 24.54 
 
 35-53 
 
 y Cephei .... 
 
 . 
 
 37 '7-52 
 
 -+- 0.18 
 
 -30.49 
 
 - 0.55 
 
 36 46.66 
 
 34 11.00 
 
 35-66 
 
 Groombridge 4163 
 
 W. 
 
 51 39-62 
 
 + 0.15 
 
 -22.75 
 
 + 0.44 
 
 51 17.46 
 
 48 41.94 
 
 35-52 
 
 <J Piscium 
 
 
 55 15-69 
 
 + 0.03 
 
 + 6.68 
 
 + 0.12 
 
 55 22.52 
 
 52 46.88 
 
 35-64 
 
 a Andromedae . . 
 
 
 24 4 21.55 
 
 + 0.03 
 
 + 2.81 
 
 + O.I4 
 
 24 4 24.53 
 
 24 I 49.04 
 
 35-49 
 
 y Pegasi .... 
 
 
 
 9 11.46 
 
 O.OI 
 
 + 5-39 
 
 + 0.13 
 
 9 16.97 
 
 6 41.32 
 
 35-65 
 
 Mean 23'" 30"" local sidereal time 
 
 2 35-55 
 
 
 
 Normal Equations. 
 
 T<5t+ 2.23<z + o.2g<r= 30.02 a =: 11.725 
 
 2.23<5/+ ii.67 4.82^ = 138.58 f=+ 0.124 
 
 0.29* 4.82 + 37.58^= + 61.02 St 0.550 
 
22 
 
 (IQ.) UNIFORM TABLES OF TIME-REDUCTIONS AT SENDING-STATION. 
 
 CHEYENNE, WYOMING TERRITORY, October 5, 1872. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 m 
 
 aA 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 a 2 Capricorni. 
 
 E. 
 
 22 2 48.80 
 
 + 0.22 
 
 + 65.35 
 
 + 0.30 
 
 22 3 54-67 
 
 20 to 58.95 
 
 -I 52 55-72 
 
 IT Capricorni. 
 
 . 
 
 II 44.94 
 
 + O.lg 
 
 + 71-72 
 
 + 0.31 
 
 12 57.16 
 
 20 1.58 
 
 55.58 
 
 Delphini . 
 
 . 
 
 19 22.33 
 
 + 0.31 
 
 + 40.34 
 
 + 0.30 
 
 2O 3.28 
 
 27 7-54 
 
 55-74 
 
 Groombridge 3241 
 
 . 
 
 25 39-18 
 
 + 1.03 
 
 -131.73 
 
 4- 0.98 
 
 23 29.46 
 
 30 33-49 
 
 55-97 
 
 " Aqilarii 
 
 . 
 
 37 40.48 
 
 + 0.25 
 
 4- 61.58 
 
 + 0.30 
 
 38 42.61 
 
 45 46.87 
 
 55-74 
 
 v Cygni .... 
 
 . 
 
 45 20.01 
 
 + 0.52 
 
 4- 0.78 
 
 + 0.39 
 
 45 21.70 
 
 52 25.69 
 
 56.01 
 
 61 Cygni .... 
 
 . 
 
 54 i-52 
 
 + 0.50 
 
 t- 5-27 
 
 + 0.38 
 
 54 7.67 
 
 21 I 11.63 
 
 56.04 
 
 a Cephei .... 
 
 . 
 
 23 9 27.52 
 
 + 0.79 
 
 59-93 
 
 + 0.64 
 
 23 8 29.02 
 
 15 33-14 
 
 55.88 
 
 /3 Aquarii 
 
 . 
 
 16 48.55 
 
 + 0.28 
 
 4- 58.12 
 
 4- 0.30 
 
 17 47-25 
 
 24 5L33 
 
 55-92 
 
 Pegasi .... 
 
 . 
 
 30 9.30 
 
 + 0.34 
 
 -t- 41-72 
 
 4- 0.30 
 
 30 51.66 
 
 37 56.05 
 
 55-61 
 
 II Cephei .... 
 
 . 
 
 34 56.12 
 
 -t- 1.05 
 
 -7.73 
 
 + 0.91 
 
 33 0.35 
 
 4 4-57 
 
 55.78 
 
 ft Capricorni. 
 
 . 
 
 38 10.01 
 
 + O.22 
 
 4- 66.69 
 
 4- 0.31 
 
 39 r 7-22 
 
 46 21.32 
 
 55-9 
 
 79 Draconis . 
 
 . 
 
 46 35-77 
 
 4- 1.16 
 
 -143.21 
 
 4- 1.03 
 
 44 14-75 
 
 5i 18.93 
 
 55-82 
 
 a Aquarii. . 
 
 . 
 
 51 17.44 
 
 4- 0.29 
 
 + 52.77 
 
 4- 0.30 
 
 52 10.80 
 
 59 14-78 
 
 . 56.02 
 
 6 Aquarii. 
 
 
 
 24 2 I.Q2 
 
 4- 0.26 
 
 60.48 
 
 4- 0.30 
 
 24 3 2.96 
 
 22 IO 7.06 
 
 55-9 
 
 
 T C2 C C R \ 
 
 
 L o^ 5b'4 
 
 
 Normal Equations. 
 
 \t,St 0.9212=4 74.33 a = 78.642 
 
 0.921^4- 13.950= 1097.11 <W=4- 0.160 
 
 CHEYENNE, WYOMING TERRITORY, October 5, 1872. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 1>B 
 
 aA 
 
 cC 
 
 T' 
 
 AR, 
 
 AT 
 
 
 
 h. m. s- 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 t Piscium . . . 
 
 W. 
 
 25 25 33.95 
 
 + 0.28 
 
 + 46.27 
 
 0.30 
 
 25 26 20.20 
 
 23 33 24.59 
 
 -I 52 55-61 
 
 y Cephi .... 
 
 . 
 
 30 28.91 
 
 + 1.25 
 
 201.71 
 
 - 1-33 
 
 27 7.12 
 
 34 1 1. 60 
 
 55-52 
 
 Groombridge 4163 
 
 . 
 
 44 7-86 
 
 + 1.05 
 
 -149.71 
 
 -.1.07 
 
 4i 38.13 
 
 48 42.32 
 
 55-81 
 
 a Andromedae . 
 
 . 
 
 54 25.00 
 
 4- 0.39 
 
 + 19-59 
 
 0-34 
 
 54 44.64 
 
 24 I 49.06 
 
 55.58 
 
 7 Pegasi . ... . 
 
 
 
 59 0-72 
 
 + 0.32 
 
 + 36.13 
 
 - 0.31 
 
 59 36.86 
 
 6 41-33 
 
 55-53 
 
 
 I ^2 ^S 60 
 
 
 * y 33 ** 
 
 Normal Equations. 
 
 5(V+ 3. 2ia= 247.54 a= 78.00 
 
 3. 21 (5/4- n.o2a= 857.87 (S/=+o.s8 
 
(TO.) UNIFORM TABLES OF TIME-REDUCTIONS AT RECEIVING-STATION Continued. 
 
 CHEYENNE, WYOMING TERRITORY, October 14, 1872. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 B 
 
 aA 
 
 eC 
 
 r 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 6 Aquarii. 
 
 W. 
 
 24 2 50.84 
 
 + 0.05 
 
 0.70 
 
 - 0.35 
 
 24 2 49.84 
 
 22 10 6.97 
 
 -I 52 42.87 
 
 TT Aquarii. 
 
 
 10 30.51 
 
 4- 0.06 
 
 - 0.59 
 
 - 0.35 
 
 10 29.63 
 
 18 46.61 
 
 43.02 
 
 g Draconis, L. C. . 
 
 . 
 
 16 54.06 
 
 0.16 
 
 - 3-42 
 
 + 1.48 
 
 16 51.96 
 
 24 9.01 
 
 42.95 
 
 226 Cephei .... 
 
 
 22 46.08 
 
 4- 0.26 
 
 + 2.07 
 
 - 1.40 
 
 22 47.OI 
 
 30 4.06 
 
 42.95 
 
 f Pegasi . ' . 
 
 
 27 50.73 
 
 + 0.07 
 
 - 0.48 
 
 0.36 
 
 27 49.96 
 
 35 6.88 
 
 43.08 
 
 L Cephei .... 
 
 . 
 
 38 53.05 
 
 4- 0.17 
 
 4- 0.91 
 
 - 0.84 
 
 38 53.29 
 
 .45 10.27 
 
 43-02 
 
 a Piscis Australia . 
 
 . 
 
 43 21.71 
 
 4- 0.03 
 
 1. 00 
 
 - 0.41 
 
 43 20.33 
 
 50 37.19 
 
 43-14 
 
 n Pegasi .... 
 
 
 CO O TC 
 
 4- 0.07 
 
 0.42 
 
 0.36 
 
 50 8.64 
 
 58 25.46 
 
 43.18 
 
 Mean at 22 11 30'" local sidereal time . 
 
 
 
 
 
 
 
 I 52 43.03 
 
 
 
 Normal Equations. 
 
 8<5/4- 3.qg 7.4O<r= 6.38 a = 0.91 
 
 3.Q9'V+ 22.89 a + 23.741: = 12.73 t +0.35 
 
 7.40<J/4- 23.740 4-45. 34<r = 5.45 it =0.02 
 
 CHEYENNE, WYOMING TERRITORY, October 14, 1872. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 t>B 
 
 <zA 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 
 E. 
 
 2C 26 <\I 23 
 
 _|_ o. 46 
 
 -L, T QT 
 
 4- 0.88 
 
 or 26 C d HA 
 
 2*3 U T I *5O 
 
 ~ I C2 A1 2d 
 
 Groombridge4i63 
 
 
 *3 f '^ J D * ' " J 
 
 41 22.86 
 
 + 0.39 
 
 ~ A y / 
 + 1.46 
 
 + 0.71 
 
 *J ^ u J-f'J't 
 41 25.42 
 
 *J J4 A A 3** 
 48 42.13 
 
 i D* *tj.^f 
 43-29 
 
 a Piscium . . . 
 
 . 
 
 45 30.00 
 
 + O. IO 
 
 - 0.44 
 
 + O.2O 
 
 45 29.86 
 
 52 46.89 
 
 42-97 
 
 4 Draconis, L. C. . 
 
 
 58 55.60 
 
 0.32 
 
 - 3-27 
 
 - 0.99 
 
 55 51-02 
 
 24 6 7.60 
 
 43-40 
 
 a Cassiopeiae 
 
 W. 
 
 26 26 1.77 
 
 + O.IO 
 
 + 0.34 
 
 0.36 
 
 26 26 1.85 
 
 33 18.71 
 
 43-14 
 
 21 Cassiopeiae 
 
 
 30 I . So 
 
 + 0.18 
 
 + 1-54 
 
 - 0.75 
 
 30 2.77 
 
 37 19-31 
 
 43.46 
 
 c Piscium . . . 
 
 . 
 
 49 4.42 
 
 + 0.05 
 
 - 0.43 
 
 O.2O 
 
 49 3.84 
 
 56 20.74 
 
 43.10 
 
 l Ceti .... 
 
 
 27 10 24.33 
 
 4- 0.04 
 
 - 0.59 
 
 0.2O 
 
 27 10 23.58 
 
 25 17 40.21 
 
 43-37 
 
 38 Cassiopeiae 
 
 . 
 
 14 31-84 
 
 + 0.15 
 
 + 1.04 
 
 - 0.57 
 
 14 32.46 
 
 21 49.26 
 
 43.20 
 
 t/ Piscium 
 
 . 
 
 17 24.58 
 
 + 0.07 
 
 - 0.35 
 
 O.2I 
 
 17 24.09 
 
 24 40.83 
 
 43.26 
 
 o Piscium 
 
 
 
 31 24.62 
 
 + 0.05 
 
 0.41 
 
 O.20 
 
 31 24.06 
 
 38 40.93 
 
 43-13 
 
 Mean at 24'' 30" local sidereal time 
 
 I <2 4*3 "21 
 
 
 1 D* T-J *J 
 
 Normal Equations. 
 
 ii(S/ i.i2a 8.35<r= 3.39 a = 0.76 
 
 i.i2(!/4- 36.820 29.15*: = 33.68 c = + 0.20 
 
 8.35 it 29. 15 a + 86.78 c = + 42. 90 rf/ = 0.23 
 
24 
 
 (ID.) UNIFORM TABLES OF TIME-REDUCTIONS AT RECEIVING-STATION Continued. 
 
 CHEYENNE, WYOMING TERRITORY, October 16, 1872. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 f>B 
 
 A 
 
 ^C 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 Groombridge 3241 
 
 E. 
 
 22 23 11.27 
 
 + 0.53 
 
 + 1.51 
 
 + o-33 
 
 22 23 13.64 
 
 20 30 32.58 
 
 I 52 41 .06 
 
 a Cygni .... 
 
 
 29 45-57 
 
 + 0.26 
 
 + 0.08 
 
 + 0.14 
 
 29 46.05 
 
 37 5-29 
 
 40.76 
 
 . Aquarii 
 
 . 
 
 38 28.07 
 
 + 0.12 
 
 0.71 
 
 + O.IO 
 
 38 27.58 
 
 45 46.74 
 
 40.84 
 
 v Cygni .... 
 
 . 
 
 45 5-8o 
 
 + 0.28 
 
 O.OI 
 
 + 0.13 
 
 45 6.20 
 
 52 25.44 
 
 40.76 
 
 61 Cygni .... 
 
 
 53 5i-8i 
 
 + 0.29 
 
 0.06 
 
 + 0.13 
 
 53 52.17 
 
 21 I 11.41 
 
 40.76 
 
 if Aquarii 
 
 W 
 
 24 ii 28.03 
 
 + 0.18 
 
 0.58 
 
 o. 10 
 
 24 ii 27.53 
 
 22 18 46.59 
 
 40.94 
 
 9 Draconis, L. C. 
 
 . 
 
 16 53.41 
 
 - 0.47 
 
 - 3-39 
 
 + 0.42 
 
 16 49.97 
 
 24 9-25 
 
 40.72 
 
 ., Aquarii 
 
 . 
 
 21 30.52 
 
 + 0.19 
 
 0.60 
 
 O.IO 
 
 21 3O.OI 
 
 28 48.96 
 
 41.05 
 
 f Pegasi .... 
 
 . 
 
 27 48.17 
 
 + 0.23 
 
 - 0.47 
 
 O. IO 
 
 27 47.83 
 
 35 6.86 
 
 40.97 
 
 
 I 52 40.88 
 
 
 
 Normal Equations. 
 
 gt+ 4.690+ 9.48^= 2.42 rt = 0.90 
 
 4. f>gdt+ 18.723+ g.4O<r= 15.04 <T=+O.IO 
 
 9.481?^+ g.4O<z + 37.94*- = 2.72 <W=+o.io 
 
 CHEYENNE, WYOMING TERRITORY, October 16, 1872. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 ftB 
 
 <zA 
 
 <rC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 S. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 4 Draconis, L. C. . 
 
 W. 
 
 I 58 52-98 
 
 - 0.66 
 
 - 4.99 
 
 + 1.13 
 
 I 58 48.46 
 
 o 6 7 . 70 
 
 i 52 40.76 
 
 a Cassiopeix 
 
 . 
 
 2 25 58.46 
 
 + 0.50 
 
 + 0.52 
 
 0.41 
 
 2 25 59.07 
 
 33 18.71 
 
 40.36 
 
 21 Cassiopeiae 
 
 . 
 
 29 57.65 
 
 + 0.99 
 
 + 2-34 
 
 0.85 
 
 30 O.I3 
 
 37 ig-30 
 
 40.83 
 
 E Piscium 
 
 . 
 
 49 r -78 
 
 + 0.32 
 
 0.65 
 
 0.23 
 
 49 1.22 
 
 56 20.75 
 
 40.47 
 
 g Ceti 
 
 E. 
 
 3 IO 21.21 
 
 + 0.25 
 
 O.QO 
 
 + 0.23 
 
 3 10 20.79 
 
 I 17 40.24 
 
 40.55 
 
 38 Cassiopeiae 
 
 
 14 26.64 
 
 + 0.95 
 
 V. yv 
 
 + 1-59 
 
 + 0.66 
 
 14 29.84 
 
 21 49.29 
 
 40.55 
 
 ij Piscium . . . 
 
 . 
 
 17 21.33 
 
 + 0.37 
 
 - 0-53 
 
 + 0.24 
 
 17 21.41 
 
 24 40.85 
 
 40.56 
 
 
 I 52 40.58 
 
 
 
 Normal Equations. 
 
 T&t+ 2.260+ 3.37^ = 5.92 a 1.160 
 
 2.26(^+25.78 + 26. 2$c = 25.42 <r = +0.225 
 
 3.37*+ 26.250 + 52.52 <r = 20.71 <= 0.590 
 
25 
 
 (ID.) UNIFORM TABLES OF TIME-REDUCTIONS AT RECEIVING-STATION Continued. 
 
 CHEYENNE, WYOMING TERRITORY, October 18, 1872. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 6B 
 
 A 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. ni. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 <fl UrsxMaj., L.C. . 
 
 W. 
 
 22 51 48.50 
 
 o%i4 
 
 - 3-'3 
 
 + 0.52 
 
 22 51 45-75 
 
 59 7-95 
 
 -i 52 37.80 
 
 C Cygni .... 
 
 . 
 
 23 o 9.13 
 
 + 0.17 
 
 0.29 
 
 0.23 
 
 23 o 8 . 78 
 
 21 7 30.88 
 
 37-90 
 
 a Cephei .... 
 
 
 8 9.66 
 
 + 0.32 
 
 + 0.96 
 
 - 0.43 
 
 8 10.51 
 
 15 32-64 
 
 37-87 
 
 I Draconis, L. C. 
 
 
 II 25.78 
 
 0.62 
 
 - 7.48 
 
 + 1.42 
 
 n 19.10 
 
 9 18 41.04 
 
 38.06 
 
 /? Cephei .... 
 
 
 19 37.72 
 
 + 0.51 
 
 + 1.78 
 
 - 0.59 
 
 19 39.42 
 
 21 27 1.22 
 
 38.20 
 
 f Aquarii. . . . 
 
 . 
 
 23 37-34 
 
 + 0.13 
 
 - 0-97 
 
 O.2O 
 
 23 36.30 
 
 30 58.24 
 
 38.06 
 
 e Pegasi .... 
 
 . 
 
 30 34-49 
 
 + 0.17 
 
 0.67 
 
 0.2C 
 
 30 33-79 
 
 37 55-9 
 
 37-89 
 
 ii Cephei .... 
 
 . 
 
 32 40.02 
 
 + 0.53 
 
 + 1.89 
 
 0.61 
 
 32 41-83 
 
 40 3.88 
 
 37-95 
 
 ft Capricorn! . 
 
 . 
 
 39 0-41 
 
 + 0.14 
 
 - 1.07 
 
 O.2I 
 
 38 59-27 
 
 46 21.17 
 
 38.10 
 
 79 Draconis . 
 
 
 43 54-7 
 
 + 0.58 
 
 + 2.29 
 
 0.69 
 
 43 56-25 
 
 51 18.18 
 
 38.07 
 
 
 I 52 17. oq 
 
 
 J J 1 yy 
 
 Normal Equations. 
 
 io<5/+ 5.330 = 6.61 a = 1.256 
 
 5-33<"+ 51.260 = 64.32 6t=+o.oio 
 
 CHEYENNE, WYOMING TERRITORY, October 18, 1872. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 6B 
 
 aA 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 ( Piscium . . . 
 
 W. 
 
 25 26 2.90 
 
 -t- O.O2 
 
 0.58 
 
 O.2O 
 
 25 26 2.14 
 
 23 33 24.56 
 
 -i 52 37.58 
 
 Groombridge 4163 
 
 . 
 
 41 18.63 
 
 0.03 
 
 + 1.87 
 
 - 0.71 
 
 41 19.76 
 
 48 42.03 
 
 37-73 
 
 o Piscium 
 
 . 
 
 45 25.25 
 
 O.OI 
 
 0.56 
 
 O.20 
 
 45 24.48 
 
 52 46.89 
 
 37-59 
 
 4 Draconis, L. C. . 
 
 . 
 
 58 48.54 
 
 -t- O.IO 
 
 - 4.19 
 
 + 0.99 
 
 58 45-44 
 
 24 6 7.77 
 
 37-67 
 
 o Cassiopeae . 
 
 . 
 
 26 24 56.21 
 
 0.03 
 
 + 0.44 
 
 0.36 
 
 26 24 56.26 
 
 33 18.70 
 
 37.56 
 
 ft Ceti 
 
 
 20 m "\\ 
 
 o. 02 
 
 o. 89 
 
 O. 21 
 
 20 ^o 10 
 
 ^,7 T2 5C 
 
 11 6/1 
 
 E Piscium . . . 
 
 
 *y D * * J* 
 48 59.06 
 
 O.O2 
 
 - 0.55 
 
 O.2O 
 
 ~y D V - *y 
 
 48 58.29 
 
 J/ A * 3D 
 56 2O.76 
 
 J 1 ' U< T 
 
 37-53 
 
 Mean at 24 h local sidereal time 
 
 i 52 37.61 
 
 
 
 Normal Equations. 
 
 7<fr+ 4.570 = 1.76 'a = 0.975 
 
 4.57^ + 24.190 = 21.82 &t= +0.390 
 
26 
 
 (zo.) UNIFORM TABLES OF TIME-REDUCTIONS AT RECEIVING-STATION Continued. 
 
 CHEYENNE, WYOMING TERRITORY, October 19, 1872. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 6B 
 
 flA 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 <J* Ursae Majoris.L. C. 
 
 W. 
 
 22 51 45.73 
 
 + 0.17 
 
 - 1.04 
 
 0.08 
 
 22 51 44.78 
 
 20 59 8. 02 
 
 I 52 36.76 
 
 f Cygni .... 
 
 . 
 
 23 o 8.13 
 
 0.23 
 
 o. 10 
 
 + 0.03 
 
 23 o 7.83 
 
 21 7 30.87 
 
 36.96 
 
 a Cephei .... 
 
 
 8 9-55 
 
 0.40 
 
 + 0.32 
 
 + 0.06 
 
 8 9-53 
 
 15 32.60 
 
 3M3 
 
 I Draconis, L. C. 
 
 . 
 
 11 20.45 
 
 + 0.78 
 
 - 2.49 
 
 0.21 
 
 ii 18.53 
 
 18 41.22 
 
 37-31 
 
 /? Aquarii. 
 
 
 17 28.70 
 
 - 0.14 
 
 0.31 
 
 + 0.03 
 
 17 28.28 
 
 24 51.15 
 
 37-13 
 
 /3 Cephei .... 
 
 
 19 38.10 
 
 - 0.51 
 
 + 0.59 
 
 + 0.09 
 
 19 38.27 
 
 26 1.17 
 
 37-10 
 
 f Aquarii. . . 
 
 . 
 
 23 35.84 
 
 - 0.13 
 
 0.32 
 
 + 0.03 
 
 23 35.42 
 
 30 58.22 
 
 37-20 
 
 e Pegasi .... 
 
 
 30 33.38 
 
 - 0.17 
 
 0.22 
 
 + 0.03 
 
 30 33.02 
 
 37 55-88 
 
 37-14 
 
 ii Cephei .... 
 
 
 32 40.62 
 
 - 0.34 
 
 + 0.63 
 
 + O.Og 
 
 32 41.00 
 
 40 3.83 
 
 37-17 
 
 H Capricorn! 
 
 . 
 
 38 58.85 
 
 0.08 
 
 0.36 
 
 + 0.03 
 
 38 58.44 
 
 46 21. 16 
 
 37-28 
 
 79 Draconis . 
 
 . 
 
 43 55-14 
 
 - 0.35 
 
 + 0.76 
 
 + C.IO 
 
 43 55.65 
 
 51 18.12 
 
 37-53 
 
 v Aquarii 
 
 E. 
 
 o ii 24.15 
 
 O.IO 
 
 O.27 
 
 0.03 
 
 o II 23.75 
 
 22 18 46.56 
 
 37-19 
 
 9 Draconis, L. C. 
 
 . 
 
 16 47.94 
 
 + 0.27 
 
 - 1.58 
 
 + 0.13 
 
 16 46.76 
 
 24 9-53 
 
 37-23 
 
 f Pegasi .... 
 
 
 27 44.47 
 
 0.12 
 
 O.22 
 
 0.03 
 
 27 44.10 
 
 35 6.83 
 
 37-27 
 
 
 1 52 37.16 
 
 
 
 Normal Equations. 
 
 I4d/+ n.ooa 9.251:= 6.54 a = 0.42 
 
 ii. oo<5< + 66.64(1+ 47. igc= 30.96 c = 0.03 
 
 9.25 6t + 47.190 + 116.65 c= 21. 10 fit= 0.20 
 
 CHEYENNE, WYOMING TERRITORY, October 19, 1872, 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 6B 
 
 <zA 
 
 rC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 o Cephei .... 
 
 E. 
 
 25 6 2.45 
 
 0.56 
 
 +- 0.64 
 
 + 0.04 
 
 25 6 2.57 
 
 23 13 25.74 
 
 -I 52 36.83 
 
 8 Piscium 
 
 . 
 
 14 8-37 
 
 0.2O 
 
 0.32 
 
 + 0.02 
 
 14 7.87 
 
 21 30.90 
 
 36.97 
 
 y Cephei .... 
 
 . 
 
 26 47.54 
 
 - 0.86 
 
 + 1-45 
 
 + 0.07 
 
 26 48.20 
 
 34 I i. 10 
 
 37.10 
 
 u Piscium 
 
 . 
 
 45 24-30 
 
 O.20 
 
 0.32 
 
 + 0.02 
 
 45 23.8o 
 
 52 46.88 
 
 36.92 
 
 4 Draconis, L. C. 
 
 
 58 47-02 
 
 + 0.24 
 
 - 2.41 
 
 O.O7 
 
 58 44.78 
 
 24 6 7.81 
 
 36.97 
 
 21 Cassiopeiae 
 
 W. 
 
 26 29 55.48 
 
 O.Og 
 
 + 1.13 
 
 O.O6 
 
 26 29 56.46 
 
 37 19-27 
 
 37-19 
 
 32 Camelop., L. C. . 
 
 
 40 44-93 
 
 + O.l6 
 
 - 4-45 
 
 + 0.15 
 
 40 40.79 
 
 48 3-69 
 
 37.10 
 
 c Piscium . . 
 
 . 
 
 48 58.09 
 
 O.O2 
 
 0.31 
 
 O.O2 
 
 48 57-74 
 
 56 20.76 
 
 36.98 
 
 6 Ceti .... 
 
 
 27 10 17.73 
 
 O.O2 
 
 0.44 
 
 O.O2 
 
 27 10 17.25 
 
 25 17 40.26 
 
 36.99 
 
 38 Cassiopeise . . 
 
 
 
 14 25.80 
 
 o.oS 
 
 + 0.77 
 
 O.O6 
 
 14 26.43 
 
 21 49.32 
 
 37-10 
 
 q Piscium 
 
 
 17 i8.ii 
 
 0.03 
 
 0.26 
 
 O.O2 
 
 17 17.81 
 
 24 40.87 
 
 36.94 
 
 
 i 52 37.01 
 
 
 
 Normal Equations. 
 
 nit+ 8.080+ 4.22c 4.52 o= 0.560 
 
 8.o8<5/ + 97.49<j + 52.40^= 53.73 c= +0.015 
 
 4.22 it + 52.4012 + 172. 3&r = 26.64 &t o.ooo 
 
27 
 
 (TO.) UNIFORM TABLES OF TIME-REDUCTIONS AT RECEIVING-STATION Continued. 
 
 CHEYENNE, WYOMING TERRITORY, October 21, 1872. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 6B 
 
 rtA 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 /' Capricorn!. 
 
 W. 
 
 23 3S 55-98 
 
 + O.O2 
 
 - 0.85 
 
 0.16 
 
 23 38 54-99 
 
 21 46 21.13 
 
 -I 52 33.86 
 
 79 Draconis . 
 
 
 43 50.79 
 
 + 0.09 
 
 + 1.82 
 
 - 0.55 
 
 43 52.15 
 
 51 17-99 
 
 34.16 
 
 a Aquarii. 
 
 
 51 49- 2 3 
 
 + 0.01 
 
 0.67 
 
 o. 16 
 
 51 48.41 
 
 59 14.62 
 
 33-79 
 
 32 Ursae Maj., L. C. . 
 
 
 24 I ig.g4 
 
 0.03 
 
 - 2.33 
 
 + 0.39 
 
 24 I 17-97 
 
 22 8 43.77 
 
 34-20 
 
 ir Aquarii. 
 
 . 
 
 II 21.07 
 
 + 0.03 
 
 0.65 
 
 0.16 
 
 II 20.29 
 
 18 46.54 
 
 33-75 
 
 g Draconis, L. C. 
 
 
 16 46.57 
 
 0.08 
 
 - 3.76 
 
 +- 0.68 
 
 16 43.41 
 
 24 9.60 
 
 33-Si 
 
 TI Aquarii. 
 
 
 21 23.47 
 
 + 0.03 
 
 0.67 
 
 o. 16 
 
 21 22.67 
 
 28 48.91 
 
 33.76 
 
 C Pegasi .... 
 
 
 27 41 .28 
 
 + 0.07 
 
 0.52 
 
 0.16 
 
 27 40.67 
 
 35 6.81 
 
 33-86 
 
 a Pegasi .... 
 
 E. 
 
 50 5g.66 
 
 + 0.07 
 
 0.46 
 
 + 0.16 
 
 50 59-43 
 
 58 25.41 
 
 34.02 
 
 o Cephei .... 
 
 . 
 
 25 5 58.18 
 
 + 0.18 
 
 + 1.15 
 
 + 0.41 
 
 25 5 59-92 
 
 23 13 25.68 
 
 34-34 
 
 8 Piscium 
 
 
 M 5-ig 
 
 + 0.06 
 
 - 0.58 
 
 + 0.16 
 
 14 4-83 
 
 21 30.89 
 
 33.84 
 
 >. Draconis, L. C. 
 
 
 1 6 23.34 
 
 0.08 
 
 - 2-73 
 
 - 0.47 
 
 16 20.06 
 
 23 46.30 
 
 33.76 
 
 y Cephei .... 
 
 
 26 41 .07 
 
 + 0.29 
 
 + 2.59 
 
 + 0.71 
 
 27 44.66 
 
 34 it. oi 
 
 33.65 
 
 Mean at 23'' local sidereal time 
 
 I 52 33.91 
 
 
 
 Normal Equations. 
 
 I3<" + 7.66n + 4.30.:=: 5.93 = I.oo 
 
 7. 66(5^ + 41. 220+ 3.07<r = 39.91 c=+O.l6 
 
 4.301!^+ 3.07* + 77.44^ = + 9.96 <5/ = + o.io 
 
 CHEYENNE, WYOMING TERRITORY, Octobers, 1872. 
 
 Name of Star. 
 
 lamp. 
 
 T 
 
 bB 
 
 aA. 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 a Cassiopese 
 
 E. 
 
 2 25 51.28 
 
 + o.og 
 
 + 0.43 
 
 + 0.25 
 
 2 25 52.05 
 
 o 33 18.69 
 
 -I 52 33.36 
 
 21 Cassiopese 
 
 
 2g 50.46 
 
 + 0.15 
 
 + 1.92 
 
 + 0.52 
 
 29 53.05 
 
 37 19-22 
 
 33.83 
 
 32 Camelopard., L. C. 
 
 
 40 46.90 
 
 - 0-45 
 
 - 7-55 
 
 - 1.36 
 
 40 37-54 
 
 48 3-75 
 
 33-79 
 
 Piscium 
 
 
 48 54.62 
 
 + 0.06 
 
 - 0.53 
 
 + 0.14 
 
 48 54.29 
 
 56 20.76 
 
 33-53 
 
 6 Ceti 
 
 W. 
 
 3 10 14.40 
 
 + 0.07 
 
 - 0.74 
 
 o. 14 
 
 3 10 13.59 
 
 I 17 40.26 
 
 33-33 
 
 
 38 Cassiopere 
 
 
 14 21.72 
 
 + 0.30 
 
 + 1.30 
 
 - 0.40 
 
 14 22.92 
 
 21 49.31 
 
 33-61 
 
 ri Piscium 
 
 
 17 14.62 
 
 + 0.15 
 
 - 0.44 
 
 - 0.14 
 
 17 14.19 
 
 24 40.87 
 
 33-32 
 
 Mean at 25'' local sidereal time 
 
 i 52 33.54 
 
 
 
 Normal Equations. 
 
 7 fit + 5. girt 8.16*= 3.27 = 0.950 
 
 5.91 it + 70.4g<7 - 82. 36^ = 75.09 -=+0.140 
 
 8. ibtt 82.360 + 122. 8o<r = -t-go.gS (^= + 0.490 
 
28 
 
 The following table shows the corrections and the rate of the chronometers used 
 at Cheyenne and Salt Lake City: 
 
 CHEYENNE. NEGUS 1499. 
 
 Date. 
 
 Local 
 sidereal hour. 
 
 Correction of chronometer. 
 
 Rate per hour. 
 
 1872. 
 October 5 
 
 h. 
 22.50 
 
 h. m. s. 
 
 - i 52 55.725 
 
 
 Ml 
 
 14 
 
 23.50 
 
 43-I30 
 
 + 0.058 
 
 16 
 
 23.00 
 
 40.725 
 
 + 0.051 
 
 18 
 
 23.00 
 
 37-800 
 
 + 0.061 
 
 19 
 
 23.25 
 
 37-085 
 
 -t- 0.030 
 
 21 
 
 24.00 
 
 33-725 
 
 + 0.069 
 
 SALT LAKE. NEGUS 1 5 I I . 
 
 Date. 
 
 Local 
 sidereal hour. 
 
 Correction of chronometer. 
 
 Rate per hour. 
 
 1872. 
 October 5 
 
 h. 
 
 22.00 
 
 h. m. s. 
 02 10.415 
 
 
 14 
 
 21-75 
 
 23.050 
 
 - 0.059 
 
 16 
 
 22.50 
 
 26-455 
 
 0.070 
 
 18 
 
 22.50 
 
 29.760 
 
 0.069 
 
 19 
 
 21.75 
 
 3L5I5 
 
 0.075 
 
 21 
 
 22.50 
 
 35-445 
 
 0.081 
 
29 
 
 (n.) GROUPING OF SERIES OF EXCHANGE-SIGNALS. 
 
 This table shows the result obtained for longitude each way each night and the 
 mean of all the nights: 
 
 Signals sent 
 from 
 
 Stations of 
 record. 
 
 Means of signals 
 sent and received. 
 
 Chronometric 
 errors. 
 
 Local sidereal 
 times. 
 
 Difference 
 of longitude. 
 
 Means. 
 
 1872. 
 October 5. 
 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 s. 
 
 Salt Lake.. \ 
 
 Cheyenne chron. 
 Salt Lake chron. 
 
 o 55 6. 20 
 22 36 1.51 
 
 i 52 55.69 
 - o 2 10.45 
 
 23 2 10.51 
 22 33 51.06 
 
 o 28 19.45 
 
 
 Cheyenne. . -J 
 
 Cheyenne chron. 
 Salt Lake chron. 
 
 I 3 24-84 
 22 44 20.17 
 
 i 52 55.69 
 
 O 2 10.46 
 
 23 10 29.15 
 
 22 42 9.71 
 
 19.44 
 
 I9.445 
 
 October 14. 
 
 
 
 
 
 
 
 Salt Lake.. j 
 
 Cheyenne chron. 
 Salt Lake chron. 
 
 I 7 50.17 
 22 49 10.68 
 
 - I 52 43.14 
 
 2 23.12 
 
 23 15 7-03 
 22 46 47.56 
 
 19.47 
 
 
 Cheyenne.. \ 
 
 Cheyenne chron. 
 Salt Lake chron. 
 
 i 15 17.75 
 
 22 56 38.32 
 
 - I 52 43.14 
 - 2 23.13 
 
 23 22 34.61 
 22 54 I5-I9 
 
 19.42 
 
 19.445 
 
 October 1 6. 
 
 
 
 
 
 
 
 Sail Lake. . ] 
 
 Cheyenne chron. 
 Salt Lake chron. 
 
 I 37 10.90 
 23 18 37-35 
 
 - I 52 40.68 
 O 2 26.51 
 
 23 44 30.22 
 23 16 10.84 
 
 I9-38 
 
 
 Cheyenne. . ] 
 
 Cheyenne chron. 
 Salt Lake chron. 
 
 I 43 40.42 
 23 25 6.95 
 
 I 52 40.67 
 O 2 26.52 
 
 23 5 59-75 
 
 23 22 40.43 
 
 19.32 
 
 I9.350 
 
 October 1 8. 
 
 
 
 
 
 
 
 Salt Lake., j 
 
 Cheyenne chron. 
 Salt Lake chron. 
 
 I 7 26.35 
 22 48 58.83 
 
 - I 52 37-79 
 O 2 29.77 
 
 23 14 48.56 
 
 22 46 29.06 
 
 19.50 
 
 
 Cheyenne. . -j 
 
 Cheyenne chron. 
 Salt Lake chron. 
 
 I 14 3.64 
 22 55 36.07 
 
 - i 52 37-79 
 
 O 2 29.79 
 
 23 21 25.85 
 22 53 6.28 
 
 19-57 
 
 19.535 
 
 October 19. 
 
 
 
 
 
 
 
 Salt Lake., -j 
 
 Cheyenne chron. 
 Salt Lake chron. 
 
 o 32 25.80 
 
 22 14 0.79 
 
 - i 52 37." 
 
 02 31.55 
 
 22 39 48.69 
 
 22 II 29.24 
 
 19-45 
 
 
 Cheyenne. . < 
 
 Cheyenne chron. 
 Salt Lake chron. 
 
 o 40 33.11 
 
 22 22 8.IO 
 
 I 52 37.10 
 
 2 31.56 
 
 22 47 56.01 
 22 19 36.54 
 
 19-47 
 
 19.460 
 
 October 21. 
 
 
 
 
 
 
 
 Salt Lake.. ] 
 
 Cheyenne chron. 
 Salt Lake chron. 
 
 I 33 9-20 
 23 '4 51-59 
 
 i 52 33-75 
 
 - 2 35.50 
 
 23 4 35-45 
 23 12 16.09 
 
 19.36 
 
 
 Cheyenne. . \ 
 
 Cheyenne chron. 
 Salt Lake chron. 
 
 I 39 10.98 
 23 20 53.34 
 
 - i 52 33-74 
 - o 2 35.51 
 
 23 46 37.24 
 23 18 17.83 
 
 19.41 
 
 19-385 
 
 Cheyenne east of Salt Lake City o h 28 m ig".437o 8 .oi7 
 
30 
 
 (12.) PERSONAL EQUATION. 
 
 Whatever differences there may have been between Mr. Austin and myself in 
 recording time, technically known as the personal equation, is still involved in the lon- 
 gitude. To determine this difference, we had two nights' observations together; the 
 one at Salt Lake in September, 1872, the other at the Naval Observatory, May, 1873. 
 In Salt Lake we used different instruments on the same stars, in Washington the same 
 instrument on different stars. The record, in both instances, was made on a chrono- 
 graph. The result shows a large difference Mr. Austin observing later than myself, 
 as may be seen by a statement of the following clock-errors: 
 
 SALT LAKE CITY, UTAH, September 13, 1872. 
 
 m. s. 
 
 Clark ! 2 37.95 
 
 O S .2O 
 
 Austin 2 38. 1 5 
 
 NAVAL OBSERVATORY, May 17, 1873. 
 
 s. 
 
 Clark +i 1.22 
 
 Austin + 10.92 
 
 Though this is not considered sufficiently satisfactory to apply without further 
 data, it is positive evidence of the existence of an element affecting our results ; and I 
 have the more faith in it because it expresses the sign between us which I would indicate 
 reasoning a priori. I am convinced that, in my own case at least, personal equation is 
 a variable quantity, and introduces an error which cannot be easily eliminated unless 
 some means be devised by which it may be determined in the course of every even- 
 ing's observations. 
 
 (13.) PROBABLE ERROR. 
 
 The computations were made by the method of least squares. The conditional 
 equations were sometimes formed with and sometimes without the correction for colli- 
 mation (c) ; in the former case it was obtained from a preliminary reduction. All the 
 observations at both stations were made under the same circumstances and conditions, 
 except the night of the Hth at Cheyenne, when the signals had to be received by 
 sound in consequence of the failure of the chronograph to work. It accords with the 
 rest, and is included with full weight; and the probable error of the final result is by 
 the formula, 
 
 Errors 0.6745 x /- TT= - OI 7- 
 
 (14.) RESULTING LONGITUDE. 
 
 From the foregoing I conclude that the difference of longitude between Salt Lake 
 City observatory and the station at Cheyenne is 28"" i9 s -437; which difference, how- 
 ever, is still subject to correction for personal equation; and if any weight is to be 
 given to what is indicated as this equation between Mr. Austin and myself, this longi- 
 tudinal difference will be reduced by the extent of, perhaps, o s .2 of a second. 
 
31 
 
 (15.) REDUCTION OF THE LATITUDE OBSERVATIONS. 
 
 Mean Places of Stars for 1872.0 used for Determination of Latitude of Cheyenne, 
 
 Wyoming Territory. 
 
 No. of 
 pair. 
 
 No. in 
 B. A. C. 
 
 Right 
 ascension. 
 
 Declination. 
 
 No. of 
 pair. 
 
 No. in 
 B. A. C. 
 
 Right 
 ascension. 
 
 Declination. 
 
 
 
 h. m. s. 
 
 , 
 
 
 
 h. m. s. 
 
 i 
 
 
 6491 
 
 18 54 8 
 
 32 30 55-3 
 
 
 7721 
 
 22 3 35 
 
 32 32 52.9 
 
 i 
 
 6497 
 
 55 9 
 
 31 58 3-4 
 
 - 
 
 " 
 
 7731 
 
 4 19 
 
 32 33 2.3 
 
 2 
 
 6579 
 
 19 8 45 
 
 49 36 56.6 
 
 
 7746 
 
 6 9 
 
 50 II 29.4 
 
 
 6626 
 
 15 22 
 
 49 19 57.8 
 
 
 
 
 
 
 
 
 
 
 7858 
 
 26 45 
 
 39 7 19-4 
 
 3 
 
 6642 
 
 18 37 
 
 16 41 23.8 
 
 3 2 
 
 7879 
 
 30 7 
 
 38 57 56.5 
 
 
 6646 
 
 19 2 
 
 2 51 40.6 
 
 33 
 
 7880 
 
 30 12 
 
 38 58 21.3 
 
 4 
 
 6647 
 
 19 o 
 
 16 42 30.2 
 
 34 
 
 7906 
 
 34 52 
 
 43 36 3LI 
 
 
 6662 
 
 19 59 
 
 65 28 5.1 
 
 
 
 
 
 
 
 
 
 n j> 
 
 7915 
 
 35 45 
 
 39 33 26.8 
 
 
 6722 
 
 31 13 
 
 36 39 42.7 
 
 35 
 on 
 
 7972 
 
 46 15 
 
 42 37 57-2 
 
 
 6754 
 
 37 52 
 
 45 13 21.6 
 
 3 
 
 3*7 
 
 7978 
 
 47 19 
 
 39 29 16.4 
 
 
 6771 
 
 39 40 
 
 37 2 46.8 
 
 37 
 
 7984 
 
 48 17 
 
 39 41 41-2 
 
 
 6777 
 
 40 54 
 
 34 42 8.2 
 
 ~Q 
 
 8023 
 
 56 2 
 
 41 38 18.2 
 
 
 6830 
 
 48 42 
 
 47 36 8.4 
 
 3 
 
 8037 
 
 58 2 9 
 
 40 35 4-0 
 
 Q 
 
 6924 
 
 2O 2 27 
 
 55 58 15.3 
 
 
 8131 
 
 23 14 18 
 
 23 2 24.9 
 
 O 
 
 6940 
 
 5 12 
 
 26 31 33.6 
 
 39 
 
 8153 
 
 16 47 
 
 59 25 55.0 
 
 
 6943 
 
 6 26 
 
 26 25 44.7 
 
 * 
 
 8160 
 
 18 58 
 
 22 42 0.3 
 
 9 
 
 6976 
 
 10 25 
 
 56 10 35.7 
 
 
 
 
 
 
 
 
 
 
 8195 
 
 25 o 
 
 38 3t 59-7 
 
 
 6933 
 
 II 30 
 
 47 19 19-5 
 
 4 1 
 
 8223 
 
 31 18 
 
 43 43 I7.I 
 
 10 
 
 6998 
 
 13 43 
 
 34 35 2.2 
 
 42 
 
 8237 
 
 34 4 
 
 43 37 3L7 
 
 
 7022 
 
 17 34 
 
 39 50 53-3 
 
 
 8279 
 
 42 36 
 
 61 30 12.6 
 
 1 1 
 
 7041 
 
 20 57 
 
 42 II 12.8 
 
 43 
 
 8296 
 
 45 52 
 
 20 57 33.7 
 
 
 
 
 
 44 
 
 8301 
 
 46 9 
 
 21 I 53-5 
 
 
 7101 
 
 28 26 
 
 41 2 12.5 
 
 45 
 
 8338 
 
 54 13 
 
 61 27 54.3 
 
 *3 
 
 7114 
 
 29 57 
 
 40 39 29.0 
 
 
 8359 
 
 57 37 
 
 61 34 30.3 
 
 
 7174 
 
 37 J7 
 
 41 '5 34-3 
 
 
 
 
 
 
 
 
 
 Af\ 
 
 68 
 
 o 14 35 
 
 67 6 46.1 
 
 
 7198 
 
 40 22 
 
 46 49 59.6 
 
 4 
 
 98 
 
 20 53 
 
 15 19 o.i 
 
 14 
 
 7213 
 
 42 24 
 
 36 I 16.6 
 
 47 
 
 .Q 
 
 102 
 
 21 33 
 
 15 44 14-2 
 
 
 
 
 
 4 
 
 116 
 
 24 8 
 
 15 19 48.6 
 
 
 7253 
 
 48 42 
 
 43-54 12.7 
 
 49 
 
 122 
 
 24 56 
 
 15 18 54.0 
 
 
 7259 
 
 49 3 
 
 43 54 4-4 
 
 
 
 
 
 
 7273 
 
 52 2 
 
 44 26 o.o 
 
 
 158 
 
 30 30 
 
 34 4' 41-9 
 
 
 7290 
 
 53 53 
 
 43 58 25.2 
 
 5 
 
 e T 
 
 197 
 
 37 20 
 
 47 9 43-7 
 
 
 7317 
 
 57 47 
 
 44 17 12.6 
 
 5' 
 
 198 
 
 37 35 
 
 47 35 o.i 
 
 15, 16 
 
 7320 
 
 58 6 
 
 38 9 9-6 
 
 
 
 
 
 17, 18 
 
 7336 
 
 21 I 2 
 
 38 7 16.8 
 
 
 255 
 
 49 3 
 
 59 40 8.8 
 
 19, 20 
 
 7337 
 
 I 3 
 
 38 7 8 5 
 
 5 2 
 
 264 
 
 50 23 
 
 22 43 32.6 
 
 
 7365 
 
 6 18 
 
 53 2 28.3 
 
 
 290 
 
 56 43 
 
 53 31 6.2 
 
 2 1 
 
 7368 
 
 7 28 
 
 29 42 10.7 
 
 53 
 
 299 
 
 57 28 
 
 28 58 31.5 
 
 22 
 
 7398 
 
 12 24 
 
 38 51 33-6 
 
 
 341 
 
 l 3 25 
 
 14 59 29.4 
 
 
 7402 
 
 "3 40 
 
 43 24 29.1 
 
 54 
 
 379 
 
 9 35 
 
 67 8 26.9 
 
 23 
 
 7410 
 
 7476 
 
 15 to 
 23 53 
 
 23 19 6.6 
 59 u 37-3 
 
 55 
 56 
 
 394 
 427 
 431 
 
 12 38 
 19 21 
 19 46 
 
 63 59 9-5 
 18 30 19.0 
 
 18 34 35-5 
 
 24 
 
 7453 
 
 20 33 
 
 36 6 54.9 
 
 
 444 
 
 23 9 
 
 67 44 58.1 
 
 25 
 
 7462 
 
 22 8 
 
 36 33 40.7 
 
 57 
 
 453 
 
 24 38 
 
 14 4' 7-2 
 
 
 7469 
 748o 
 
 22 48 
 M 40 
 
 45 51 36.2 
 45 58 37-1 
 
 58 
 
 502 
 510 
 
 33 2 
 33 58 
 
 39 55 39-1 
 41 58 10.3 
 
 
 7555 
 
 36 28 
 
 54 17 26.4 
 
 
 572 
 
 46 30 
 
 18 39 55-5 
 
 2 
 
 7568 
 
 38 25 
 
 28 9 55-7 
 
 59 
 60 
 
 573 
 
 46 30 
 
 i 8 40 3.8 
 
 ' 
 
 7569 
 
 38 25 
 
 28 9 58.2 
 
 
 583 
 
 50 13 
 
 63 59 49.4 
 
 28 
 
 7602 
 
 43 i 
 
 38 21 46.0 
 
 
 611 
 
 53 32 
 
 63 46 13-7 
 
 
 7681 
 
 57 46 
 
 44 2 1.2 
 
 61 
 
 657 
 
 227 
 
 25 19 58.5 
 
 
 7705 
 
 22 O 47 
 
 44 23 33.4 
 
 
 696 
 
 9 4 
 
 56 55 17.0 
 
(15.) REDUCTION OF THE LATITUDE-OBSERVATIONS Continued. 
 Observations for Latitude. Station, Cheyenne, Wyoming Territory. 
 
 Date. 
 
 No. of 
 star. 
 
 Micrometer 
 reading. 
 
 Level. 
 
 Remarks. 
 
 Date. 
 
 No. of 
 star. 
 
 Micrometer 
 reading. 
 
 Level. 
 
 Remarks. 
 
 N. 
 
 s. 
 
 N. 
 
 S. 
 
 1872. 
 Oct. i 
 
 7101 
 
 T. D. 
 
 27 34-5 
 
 15-0 
 
 39-0 
 
 
 1872. 
 Oct. I 
 
 8279 
 
 T. D. 
 ii 43.2 
 
 22.5 
 
 26.5 
 
 
 
 7114 
 
 5 45-5 
 
 . 
 
 . 
 
 30" late. 
 
 
 8296 
 
 23 44-5 
 
 7.0 
 
 42.0 
 
 
 
 7I7-4 
 
 24 53-8 
 
 42.0 
 
 12. 
 
 
 
 8301 
 
 27 57-5 
 
 . 
 
 
 
 
 
 
 
 
 
 
 8338 
 
 13 69.6 
 
 
 . 
 
 
 
 7273 
 
 8 17-5 
 
 . 
 
 . 
 
 
 
 
 
 
 
 
 
 7317 
 
 16 66.8 
 
 17.0 
 
 36.5 
 
 
 
 158 
 
 10 50.8 
 
 19-5 
 
 28.0 
 
 
 
 7336 
 
 26 00.9 
 
 39- o 
 
 I6. 5 
 
 
 
 197 
 
 33 69.0 
 
 9.0 
 
 39-5 
 
 
 
 7337 
 
 25 89.0 
 
 
 
 
 
 
 
 198 
 
 9 25.0 
 
 
 
 
 
 
 
 7365 
 
 2 24.0 
 
 41.0 
 
 12. 
 
 
 
 255 
 
 14 12.2 
 
 25.0 
 
 23.0 
 
 
 
 7368 
 
 31 4-0 
 
 13-0 
 
 4I.O 
 
 
 
 264 
 
 22 17.4 
 
 8.0 
 
 40.0 
 
 
 
 7398 
 
 18 64.0 
 
 14.0 
 
 4O.O 
 
 
 Oct. 3 
 
 6642 
 
 16 40.6 
 
 22.5 
 
 27-5 
 
 
 
 7402 
 
 17 31.2 
 
 50.0 
 
 5-0 
 
 
 
 6647 
 
 17 45-0 
 
 . 
 
 . 
 
 
 
 
 
 
 
 
 
 6662 
 
 21 64.8 
 
 36.0 
 
 15.0 
 
 
 
 7453 
 
 6 24.2 
 
 
 . 
 
 
 
 
 
 
 
 
 
 7462 
 
 32 8.0 
 
 25.0 
 
 30.0 
 
 
 
 6722 
 
 i 99.9 
 
 27.0 
 
 25.0 
 
 
 
 7480 
 
 15 58.8 
 
 15.0 
 
 40.0 
 
 
 
 6754 
 
 23 1-5 
 
 34-0 
 
 18.0 
 
 
 
 
 
 
 
 
 
 6771 
 
 24 27.4 
 
 24.0 
 
 28.0 
 
 
 
 7555 
 
 II 73.8 
 
 35-0 
 
 20.5 
 
 
 
 
 
 
 
 
 
 7568 
 
 23 40-7 
 
 . 
 
 , . 
 
 
 
 6940 
 
 29 83.8 
 
 31.0 
 
 23.0 
 
 
 
 
 
 
 
 
 
 6943 
 
 23 20. o 
 
 28.0 
 
 26.0 
 
 
 
 7602 
 
 ii 98.8 
 
 20. o 
 
 34 5 
 
 
 
 6976 
 
 3 41-5 
 
 
 
 
 
 
 7681 
 
 3i 57-9 
 
 19.0 
 
 38.0 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 7101 
 
 25 48.5 
 
 28.5 
 
 26.5 
 
 
 
 7721 
 
 33 24.0 
 
 . 
 
 . 
 
 
 
 7174 
 
 22 56.8 
 
 35-0 
 
 20. o 
 
 Doubtful. 
 
 
 7731 
 
 33 36.8 
 
 38.5 
 
 18.5 
 
 
 
 
 
 
 
 
 
 7746 
 
 5 42-2 
 
 3-0 
 
 54.0 
 
 
 
 7317 
 
 13 77-0 
 
 31.0 
 
 25.0 
 
 
 
 
 
 
 
 
 
 7336 
 
 23 20. o 
 
 
 
 
 
 7QI5 
 
 14 90.0 
 
 15.0 
 
 32.0 
 
 
 
 7337 
 
 23 13.0 
 
 32.0 
 
 23.5 
 
 
 
 7972 
 7978 
 7984 
 
 18 72.0 
 10 96.0 
 
 22 92.5 
 
 IO.O 
 
 10. 
 
 19.0 
 
 40.0 
 40.0 
 30.0 
 
 
 
 7398 
 7402 
 
 19 29.5 
 
 18 3-7 
 
 28.5 
 23.0 
 
 12. 
 
 18.0 
 
 
 
 
 
 
 
 
 
 7410 
 
 24 5-8 
 
 31.0 
 
 IO.O 
 
 
 
 8131 
 
 38 88.0. 
 
 19.0 
 
 30.0 
 
 
 
 7476 
 
 9 71.0 
 
 20. o 
 
 27.0 
 
 
 
 8153 
 8160 
 
 26 31.5 
 19 17.8 
 
 IO.O 
 
 20. o 
 
 39.0 
 29.0 
 
 
 
 7555 
 7568 
 
 ii 51.0 
 23 68.9 
 
 7-0 
 26.0 
 
 17.0 
 iS.o 
 
 
 
 8195 
 
 M 59-4 
 
 17.0 
 
 31.0 
 
 
 
 7602 
 
 23 33-3 
 
 25.0 
 
 18.0 
 
 
 
 8223 
 
 14 62.3 
 
 13.0 
 
 37-0 
 
 
 
 7681 
 
 14 69.0 
 
 22.5 
 
 21. 
 
 
 
 8237 
 
 20 15.5 
 
 
 
 
 
 7705 
 
 32 48.8 
 
 
 
 
33 
 
 (15.) REDUCTION OF THE LATITUDE-OBSERVATIONS Continued. 
 
 Observations for Latitude. Station, Cheyenne, Wyoming Territory. 
 
 Date. 
 
 No. of 
 star. 
 
 Micrometer 
 reading. 
 
 Level, 
 
 Remarks. 
 
 Date. 
 
 >Jo of 
 star. 
 
 Micrometer 
 reading. 
 
 Level. 
 
 Remarks. 
 
 M. 
 
 S. 
 
 N. 
 
 S. 
 
 1872. 
 
 
 T. D. 
 
 
 
 
 1872. 
 
 
 T. D. 
 
 
 
 
 Oct. 3 
 
 7721 
 
 28 77.6 
 
 30.5 
 
 Ji-5 
 
 
 Oct. 8 
 
 6722 
 
 2 63.0 
 
 15-0 
 
 31-5 
 
 
 
 7731 
 
 28 98.0 
 
 
 
 
 
 6754 
 
 23 66.8 
 
 37-0 
 
 10. 
 
 
 
 7746 
 
 o 22.5 
 
 15-5 
 
 26.5 
 
 
 
 6771 
 
 24 89.5 
 
 i6iO 
 
 32.0 
 
 
 
 7858 
 
 31 32.6 
 
 
 t . 
 
 
 
 6777 
 
 20 93.0 
 
 26.0 
 
 20.5 
 
 
 
 7879 
 
 22 51 
 
 3i-5 
 
 12-5 
 
 
 
 6830 
 
 I? 67.5 
 
 24.0 
 
 23.0 
 
 
 
 7880 
 
 22 Ig.O 
 
 
 
 
 
 
 
 
 
 
 
 7906 
 
 3 15.0 
 
 22. 
 
 22. 
 
 
 
 6924 
 
 15 63-0 
 
 33-0 
 
 ii. 5 
 
 
 
 
 
 
 
 
 
 6940 
 
 30 14.5 
 
 16.5 
 
 29.0 
 
 
 
 7972 
 
 17 89.0 
 
 21. 
 
 23-5 
 
 
 
 6943 
 
 24 46.0 
 
 36.0 
 
 9-5 
 
 
 
 7978 
 
 10 42.8 
 
 21.5 
 
 23.0 
 
 Jo 8 late. 
 
 
 6976 
 
 3 75-8 
 
 16.5 
 
 29-5 
 
 
 
 7984 
 
 22 40.6 
 
 . 
 
 . 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 7022 
 
 ii 83.0 
 
 13.0 
 
 32.5 
 
 
 
 8023 
 
 18 94.0 
 
 21.0 
 
 24.0 
 
 
 
 7041 
 
 24 15-5 
 
 35-5 
 
 IO.O 
 
 
 
 8037 
 
 17 57- S 
 
 30.0 
 
 14.0 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 7101 
 
 25 7i-o 
 
 26.0 
 
 21. 
 
 
 
 8131 
 
 30 35-5 
 
 21. 
 
 25.0 
 
 
 
 7114 
 
 3 69.0 
 
 . 
 
 . 
 
 20" late. 
 
 
 8153 
 
 17 39-o 
 
 
 
 
 
 7174 
 
 22 73.0 
 
 32.5 
 
 16.0 
 
 
 
 8160 
 
 10 64.5 
 
 30.0 
 
 15.0 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 7198 
 
 I 8l.8 
 
 31-5 
 
 16.5 
 
 
 
 8195 
 
 I? o-5 
 
 25.O 
 
 20. 
 
 
 
 7213 
 
 30 95-5 
 
 23-5 
 
 25.0 
 
 15' late. 
 
 
 8223 
 
 16 61.0 
 
 25.0 
 
 2O. O 
 
 
 
 
 
 
 
 
 
 8237 
 
 22 14.7 
 
 
 . 
 
 
 
 7290 
 
 31 26.8 
 
 38.0 
 
 II. O 
 
 
 
 
 
 
 
 
 
 7317 
 
 13 10. o 
 
 
 . 
 
 
 
 8279 
 
 13 66. o 
 
 22. 
 
 24.0 
 
 
 
 7336 
 
 22 52.2 
 
 . 
 
 4 . 
 
 
 
 8296 
 
 26 9.7 
 
 32.O 
 
 13.0 
 
 
 
 7337 
 
 22 42.O 
 
 20.5 
 
 30.0 
 
 
 
 8301 
 
 30 37-0 
 
 2O. O 
 
 26.0 
 
 
 
 
 
 
 
 
 
 8338 
 
 15 93-5 
 
 32.0 
 
 13.0 
 
 
 
 7410 
 
 25 25.0 
 
 28.5 
 
 23.0 
 
 
 
 8359 
 
 9 53-8 
 
 
 
 
 
 
 7476 
 
 9 90.5 
 
 28.5 
 
 25.5 
 
 
 
 68 
 
 6 16.3 
 
 34-0 
 
 13-5 
 
 
 
 7555 
 
 II 6O.O 
 
 33-0 
 
 20. o 
 
 
 
 98 
 
 16 67.4 
 
 18.0 
 
 2g.O 
 
 
 
 7568 
 
 23 71.0 
 
 25.5 
 
 27.5 
 
 
 
 IO2 
 
 40 94.0 
 
 
 
 
 Doubtful. 
 
 . 
 
 7602 
 
 4 78.5 
 
 22. 
 
 31.0 
 
 
 
 116 
 
 17 49.8 
 
 
 
 
 
 
 
 7681 
 
 13 99-0 
 
 37-0 
 
 17.0 
 
 
 
 122 
 
 16 62.0 
 
 . 
 
 
 
 
 
 
 
 
 
 
 158 
 
 II 94.8 
 
 30.5 
 
 16.0 
 
 
 
 7721 
 
 27 59-8 
 
 23.5 
 
 29.0 
 
 
 
 I 9 8 
 
 10 25.0 
 
 23.0 
 
 24.0 
 
 
 
 7731 
 
 27 86.0 
 
 
 
 
 
 
 
 
 
 
 
 
 
 7746 
 
 - o 97.0 
 
 35-0 
 
 18.0 
 
 
 
 255 
 
 6 45-5 
 
 25.0 
 
 22.5 
 
 
 
 
 
 
 
 
 
 264 
 
 24 9L5 
 
 27.O 
 
 20. o 
 
 
 
 7758 
 
 30 21.5 
 
 32.0 
 
 21. 
 
 
 
 
 
 
 
 
 
 7879 
 
 21 2O. O 
 
 
 
 
 
 290 
 
 9 94.0 
 
 28.O 
 
 19.0 
 
 
 
 7880 
 
 21 52.5 
 
 . 
 
 . 
 
 
 
 299 
 
 24 20. o 
 
 27.0 
 
 20.0 
 
 
 
 7906 
 
 2 8.0 
 
 30.0 
 
 21. 
 
 
34 
 
 (15.) REDUCTION OF THE LATITUDE-OBSERVATIONS Continued, 
 Observations for Latitude. Station, Cheyenne, Wyoming Territory. 
 
 Date, 
 
 No. of 
 star. 
 
 Micrometer 
 reading. 
 
 Level. 
 
 Remarks. 
 
 Date. 
 
 No. of 
 star. 
 
 Micrometer 
 reading. 
 
 Level. 
 
 Remarks. 
 
 N. 
 
 S. 
 
 N. 
 
 S. 
 
 1872. 
 
 
 T. D. 
 
 
 
 
 1872. 
 
 
 T. D. 
 
 
 
 
 Oct. 8 
 
 7972 
 
 17 34-9 
 
 32.0 
 
 22.0 
 
 
 Oct. 8 
 
 572 
 
 25 8.6 
 
 19.0 
 
 35.o 
 
 
 
 7978 
 
 10 3.0 
 
 
 
 
 
 573 
 
 24 98.5 
 
 42.0 
 
 II. 
 
 
 
 7984 
 
 22 13.5 
 
 31.0 
 
 22. 
 
 
 
 588 
 
 I 11.3 
 
 44.0 
 
 9.0 
 
 
 
 
 
 
 
 
 
 611 
 
 14 36.0 
 
 15-0 
 
 38.0 
 
 
 
 8023 
 
 ig 2.O 
 
 30.0 
 
 23.0 
 
 
 
 
 
 
 
 
 
 8037 
 
 17 76.0 
 
 31-0 
 
 23.0 
 
 20" late. 
 
 
 657 
 
 10 36.8 
 
 15.0 
 
 38.0 
 
 
 
 
 
 
 
 
 
 696 
 
 10 21.5 
 
 40.5 
 
 12. 
 
 
 
 8131 
 
 2g 71.0 
 
 21. 
 
 34-5 
 
 
 
 
 
 
 
 
 
 8153 
 
 16 79.0 
 
 36.O 
 
 19.0 
 
 
 Oct. 9 
 
 6646 
 
 16 50.4 
 
 26.5 
 
 25.0 
 
 
 
 8160 
 
 10 4.0 
 
 23.0 
 
 32.0 
 
 
 
 6647 
 
 17 57-0 
 
 
 
 
 
 
 
 
 
 
 
 
 
 6662 
 
 21 92.0 
 
 23-5 
 
 28.0 
 
 
 
 8195 
 
 '7 59-5 
 
 38.0 
 
 17.0 
 
 
 
 
 
 
 
 
 
 8223 
 
 17 6.0 
 
 25.O 
 
 30.0 
 
 
 
 6722 
 
 3 23-5 
 
 26.0 
 
 25.0 
 
 
 
 8237 
 
 22 63.8 
 
 
 
 
 
 6754 
 
 24 19.8 
 
 29.0 
 
 23.0 
 
 
 
 
 
 
 
 
 
 6771 
 
 25 50.5 
 
 31.0 
 
 21. 
 
 
 
 8279 
 
 12 13.5 
 
 35-0 
 
 21. 
 
 
 
 
 
 
 
 
 
 8296 
 
 24 63. 8 
 
 32-5 
 
 23.0 
 
 
 
 6924 
 
 15 42-5 
 
 20. o 
 
 33-0 
 
 
 
 8301 
 
 2& 89.7 
 
 34-0 
 
 20.5 
 
 
 
 6940 
 
 29 91.0 
 
 35-0 
 
 18.0 
 
 
 
 8338 
 
 14 46.0 
 
 29.0 
 
 27- C 
 
 
 
 6943 
 
 24 24.0 
 
 33-5 
 
 30.0 
 
 
 
 8359 
 
 8 8.5 
 
 
 
 
 
 
 
 6976 
 
 3 50.5 
 
 35-0 
 
 18.0 
 
 
 
 68 
 
 5 70.5 
 
 27-5 
 
 23.0 
 
 
 
 7022 
 
 35-7 
 
 32.0 
 
 19.0 
 
 
 
 98 
 
 16 18.0 
 
 26.5 
 
 24-5 
 
 
 
 7041 
 
 23 73-5 
 
 23.5 
 
 29.0 
 
 
 
 116 
 
 16 96.5 
 
 t , 
 
 
 
 
 
 
 
 
 
 
 122 
 
 15 10.0 
 
 
 
 
 
 7101 
 
 25 98.5 
 
 
 
 
 
 
 
 
 
 
 
 
 
 7114 
 
 43 4i-o 
 
 27.0 
 
 27.0 
 
 Doubtful. 
 
 
 158 
 
 20 8.0 
 
 26.0 
 
 24.0 
 
 
 
 7174 
 
 23 6.0 
 
 38.0 
 
 16.0 
 
 
 
 198 
 
 18 39.0 
 
 28.0 
 
 23.0 
 
 
 
 7198 
 
 i JO. 5 
 
 28.0 
 
 25.0 
 
 
 
 
 
 
 
 
 
 7213 
 
 36 3f-5 
 
 30.5 
 
 23.0 
 
 
 
 255 
 
 13 5i-5 
 
 35-0 
 
 17.0 
 
 
 
 
 
 
 
 
 
 264 
 
 21 93-5 
 
 14.0 
 
 37-o 
 
 
 
 7253 
 
 28 48.0 
 
 
 
 
 
 
 
 
 
 
 
 
 7259 
 
 28 47.0 
 
 30.0 
 
 23.0 
 
 Very faint. 
 
 
 290 
 
 10 70.0 
 
 32.5 
 
 20. o 
 
 30" late. . 
 
 
 7290 
 
 24 36.0 
 
 
 
 
 
 
 299 
 
 24 91.2 
 
 27.0 
 
 24-5 
 
 
 
 7320 
 
 17 42.8 
 
 33-5 
 
 21. 
 
 
 
 
 
 
 
 
 
 7336 
 
 15 58.0 
 
 
 
 
 
 
 
 341 
 
 15 35.o 
 
 25.0 
 
 26.0 
 
 
 
 7337 
 
 15 52.0 
 
 
 
 
 
 379 
 
 22 2O.5 
 
 27.0 
 
 24.0 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 7453 
 
 5 57-0 
 
 25.0 
 
 3O.O 
 
 
 
 394 
 
 5 21.0 
 
 39-o 
 
 12. 
 
 
 
 7462 
 
 3i 43-o 
 
 
 
 
 
 
 431 
 
 23 34.0 
 
 zo.o 
 
 32.0 
 
 
 
 7480 
 
 20 93.5 
 
 33-o 
 
 22. 
 
 
 
 502 
 
 6 75.0 
 
 29.0 
 
 23.0 
 
 
 
 7555 
 
 II 24.5 
 
 31.0 
 
 24.0 
 
 
 
 510 
 
 27 18.0 
 
 26.0 
 
 26.5 
 
 
 
 7568 
 
 23 37-3 
 
 34-0 
 
 2IO. 
 
 
35 
 
 (15.) REDUCTION OF THE LATITUDE-OBSERVATIONS Continued. 
 
 
 
 Observations for Latitude. Station, Cheyenne, Wyoming Territory. 
 
 Date. 
 
 No. of 
 star. 
 
 Micrometer 
 reading. 
 
 Level. 
 
 Remarks. 
 
 Date. 
 
 No. of 
 star. 
 
 Micrometer 
 reading. 
 
 Level. 
 
 Remarks. 
 
 N. 
 
 S. 
 
 N. 
 
 S. 
 
 1872. 
 
 
 T. D. 
 
 
 
 
 1872. 
 
 
 T. D. 
 
 
 
 
 Oct. g 
 
 7602 
 
 4 17-0 
 
 iS.o 
 
 38.0 
 
 
 Oct. 9 
 
 394 
 
 6 41-5 
 
 37-0 
 
 20. o 
 
 
 
 7681 
 
 J3 52.0 
 
 39-5 
 
 15-5 
 
 
 
 427 
 
 20 43.4 
 
 
 
 . 
 
 
 
 7705 
 
 25 13.0 
 
 37-0 
 
 19.0 
 
 Doubtful. 
 
 
 431 
 
 24 59-0 
 
 24.0 
 
 34-5 
 
 
 
 7721 
 
 28 16.2 
 
 12. 
 
 42.0 
 
 
 
 444 
 
 10 94.5 
 
 36.0 
 
 23.0 
 
 
 
 7731 
 
 28 40.5 
 
 
 
 
 
 453 
 
 21 72.0 
 
 24.0 
 
 33-5 
 
 
 
 7746 
 
 I 69.0 
 
 50.0 
 
 4-5 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 502 
 
 II 83.4 
 
 23.5 
 
 33-0 
 
 
 
 7858 
 
 3 55.0 
 
 23.O 
 
 34-5 
 
 
 
 510 
 
 25 7.0 
 
 4J.o 
 
 17.0 
 
 2O 8 late. 
 
 
 7879 
 
 21 57.5 
 
 
 . 
 
 
 
 
 
 
 
 
 
 7880 
 
 21 83. o 
 
 
 
 
 
 572 
 
 25 7.8 
 
 
 . . 
 
 
 
 7906 
 
 2 50.0 
 
 38.0 
 
 17.0 
 
 
 
 573 
 
 24 97.0 
 
 36.0 
 
 23.0 
 
 
 
 
 
 
 
 
 
 588 
 
 I 13-3 
 
 24.0 
 
 34-5 
 
 
 
 7972 
 
 17 16.5 
 
 38.5 
 
 19.0 
 
 
 
 611 
 
 M 27.5 
 
 
 . 
 
 
 
 7978 
 
 9 97.5 
 
 . 
 
 
 
 
 
 
 
 
 
 
 7984 
 
 21 80.5 
 
 26.O 
 
 30.5 
 
 I0 8 late. 
 
 Oct. 10 
 
 6497 
 
 II 68.5 
 
 24.0 
 
 24.0 
 
 
 
 8023 
 
 19 34.0 
 
 30.0 
 
 25.5 
 
 
 
 6579 
 
 ( 18 50.2 
 ( 18 40.8 
 
 30.0 
 32.0 
 
 20.01 
 2O.o! 
 
 Double star ; 
 doubtful. 
 
 
 8037 
 
 18 3.0 
 
 38.0 
 
 19.0 
 
 
 
 6626 
 
 34 9 T -5 
 
 24.0 
 
 24.0 
 
 
 
 8131 
 
 29 86.5 
 
 13.0 
 
 45-0 
 
 
 
 6642 
 
 17 27.2 
 
 
 . . 
 
 
 
 8153 
 
 16 71.5 
 
 50.0 
 
 8.0 
 
 
 
 6647 
 
 18 36.0 
 
 15.0 
 
 38.0 
 
 
 
 8160 
 
 10 0.5 
 
 13.0 
 
 45-0 
 
 
 
 6662 
 
 22 56.0 
 
 42.0 
 
 IO.O 
 
 
 
 8195 
 8223 
 8237 
 
 16 70.0 
 16 27.0 
 
 21 84.0 
 
 18.5 
 38.0 
 
 37-0 
 19.0 
 
 
 
 
 6722 
 
 6/54 
 6771 
 
 4 69.0 
 25 68.0 
 26 95.0 
 
 26.0 
 
 36.0 
 
 28.0 
 19.0 
 
 
 
 8279 
 
 10 96.0 
 
 42.0 
 
 16.0 
 
 
 
 
 
 
 
 
 
 8296 
 8301 
 
 23 50.0 
 27 67.5 
 
 22. 
 
 36.0 
 
 30" late. 
 
 
 6777 
 6830 
 
 20 55.0 
 17 17.8 
 
 4-5 
 
 50.0 
 
 
 
 8338 
 
 13 21.7 
 
 46.0 
 
 12. 
 
 
 
 
 
 
 
 
 
 8359 
 
 6 70.0 
 
 22. 
 
 36.0 
 
 
 
 6924 
 
 15 18.0 
 
 22. 
 
 34-o 
 
 
 
 68 
 
 9 24.0 
 
 38.0 
 
 21. 
 
 
 
 6940 
 
 29 61.5 
 
 39-o 
 
 17.0 
 
 
 
 q8 
 
 19 86. o 
 
 30.O 
 
 28.0 
 
 
 
 6943 
 
 24 n. o 
 
 39-0 
 
 17.0 
 
 
 
 116 
 
 20 54.9 
 
 
 
 
 
 6976 
 
 3 29.5 
 
 22.0 
 
 34-5 
 
 
 
 158 
 
 79 24.7 
 
 39.0 
 
 18.0 
 
 
 
 
 
 
 
 
 
 198 
 
 17 46.8 
 
 27.0 
 
 31.0 
 
 
 
 7022 
 
 13 60.0 
 
 26.O 
 
 30.0 
 
 
 
 
 
 
 
 
 
 7041 
 
 25 82.0 
 
 36-5 
 
 20. o 
 
 
 
 255 
 
 13 6.5 
 
 37-0 
 
 22. 
 
 
 
 
 
 
 
 
 
 264 
 
 21 65.0 
 
 35-5 
 
 23.0 
 
 
 
 7101 
 
 27 23.3 
 
 26.O 
 
 30.0 
 
 
 
 341 
 
 15 29.0 
 
 30.0 
 
 28.0 
 
 
 
 7114 
 
 5 33-5 
 
 . 
 
 . . 
 
 
 
 379 
 
 22 8.0 
 
 33-0 
 
 25.0 
 
 
 
 71/4 
 
 24 38.0 
 
 36.0 
 
 21-5 
 
 
36 
 
 (15.) REDUCTION OF THE LATITUDE-OBSERVATIONS Continued. 
 
 * 
 
 Observations for Latitude. Station, Cheyenne, Wyoming Territory. 
 
 Date. 
 
 No. of 
 star. 
 
 Micrometer 
 reading. 
 
 Level. 
 
 Remarks. 
 
 Date. 
 
 No. of 
 star. 
 
 Micrometer 
 reading. 
 
 Level. 
 
 Remarks, 
 
 N. 
 
 S. 
 
 N. 
 
 S. 
 
 1872. 
 
 
 T. D. 
 
 
 
 
 1872. 
 
 
 T. D. 
 
 
 
 
 Oct. 10 
 
 7253 
 
 27 88.8 
 
 
 
 
 Oct. 10 
 
 158 
 
 19 7O.O 
 
 18,0 
 
 39-0 
 
 
 
 7259 
 
 28 4.0 
 
 26.0 
 
 31-5 
 
 
 
 198 
 
 17 97-5 
 
 42.0 
 
 16.0 
 
 
 
 7273 
 
 2 I6.O 
 
 
 
 
 
 
 
 
 
 
 
 7290 
 
 2-1 85.7 
 
 . 
 
 . 
 
 
 
 255 
 
 15 34-0 
 
 26.0 
 
 31.5 
 
 
 
 7320 
 
 17 91.0 
 
 . 
 
 . 
 
 
 
 264 
 
 23 97.0 
 
 39-0 
 
 iS.o 
 
 
 
 7336 
 
 16 12.5 
 
 
 
 
 
 
 290 
 
 10 97.8 
 
 30.0 
 
 26.5 
 
 
 
 7337 
 
 16 3.0 
 
 38.0 
 
 20. o 
 
 
 
 299 
 
 25 27.7 
 
 37-0 
 
 19.0 
 
 
 
 7453 
 
 6 23.2 
 
 23.0 
 
 36.0 
 
 
 
 34i 
 
 16 20. o 
 
 37-0 
 
 19.0 
 
 
 
 7462 
 
 32 12.3 
 
 . . 
 
 . 
 
 
 
 379 
 
 22 92.0 
 
 24-5 
 
 32.5 
 
 
 
 7469 
 
 13 49- 
 
 45-0 
 
 13-5 
 
 
 
 394 
 
 8 24.0 
 
 27-5 
 
 29.0 
 
 
 
 7480 
 
 15 8.3 
 
 42.0 
 
 17.0 
 
 
 
 427 
 
 22 26.9 
 
 33-0 
 
 23.0 
 
 
 
 7555 
 
 12 48.5 
 
 46.0 
 
 12.5 
 
 
 
 431 
 
 26 38.5 
 
 
 
 
 
 
 7568 
 
 24 66.5 
 
 
 
 
 
 
 444 
 
 II 38.0 
 
 37.0 
 
 20. o 
 
 20 s late. 
 
 
 7569 
 
 26 SO.2 
 
 20.5 
 
 38.0 
 
 
 
 453 
 
 22 10.5 
 
 23.0 
 
 34.0 
 
 15' late. 
 
 
 7602 
 
 4 8r.o 
 
 3'-5 
 
 27-5 
 
 
 
 502 
 
 6 21.5 
 
 30.0 
 
 27.0 
 
 
 
 7681 
 
 13 96.5 
 
 38.0 
 
 21.5 
 
 
 
 51 
 
 26 Gi.o 
 
 32.0 
 
 26.0 
 
 15" late. 
 
 
 7858 
 
 31 53-0 
 
 26.0 
 
 36.0 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 572 
 
 25 94.2 
 
 
 . . 
 
 
 
 7879 
 
 22 85.0 
 
 
 
 
 
 573 
 
 25 81.0 
 
 II. 
 
 47.0 
 
 
 
 7880 
 
 22 53-5 
 
 
 
 
 
 
 
 588 
 
 I 98.0 
 
 
 
 
 
 7906 
 
 3 4i-o 
 
 46.0 
 
 16.0 
 
 
 
 611 
 
 15 15-0 
 
 48.0 
 
 IO.O 
 
 
 
 7972 
 
 18 57.0 
 
 32.5 
 
 30.0 
 
 
 
 Oct. 1 1 
 
 6491 
 
 12 31.5 
 
 30.0 
 
 15.0 
 
 
 
 7978 
 
 it 25.0 
 
 
 
 
 
 6579 
 
 19 4.0 
 
 25.0 
 
 20. 
 
 
 
 7984 
 
 23 24.0 
 
 33-o 
 
 29.0 
 
 
 
 6626 
 
 35 63-0 
 
 
 . . 
 
 
 
 8023 
 
 19 50.0 
 
 49.0 
 
 13.0 
 
 
 
 6642 
 
 16 51.5 
 
 35-0 
 
 13.0 
 
 
 
 8037 
 
 18 24.0 
 
 21. 
 
 41.0 
 
 
 
 6662 
 
 21 71.8 
 
 22. 
 
 25.5 
 
 
 
 8131 
 
 29 95.0 
 
 15.0 
 
 48.5 
 
 
 
 6722 
 
 4 59-o 
 
 29.0 
 
 22.0 
 
 
 
 8153 
 
 16 91.0 
 
 5LO 
 
 12.0' 
 
 
 
 6754 
 
 25 87.0 
 
 17.0 
 
 34-0 
 
 
 
 8160 
 
 10 31.0 
 
 21.0 
 
 42.0 
 
 
 
 6771 
 
 26 91.7 
 
 
 
 
 
 8279 
 
 12 87.3 
 
 29-5 
 
 28.0 
 
 
 
 6777 
 
 23 22. O 
 
 16.0 
 
 35-0 
 
 
 
 8296 
 
 25 42.5 
 
 
 
 
 
 
 
 6830 
 
 20 4.4 
 
 30.5 
 
 20. o 
 
 
 
 8301 
 
 29 66.5 
 
 37-5 
 
 20. o 
 
 
 
 
 
 
 
 
 
 8338 
 
 15 17.0 
 
 28.0 
 
 30.0 
 
 
 
 6924 
 
 15 40.0 
 
 21. 
 
 32.0 
 
 
 
 8359 
 
 8 77.0 
 
 37-5 
 
 20. o 
 
 
 
 6940 
 
 29 68. o 
 
 25.0 
 
 27.5 
 
 
 
 
 
 
 
 
 
 6943 
 
 24 6.0 
 
 22. 
 
 31.0 
 
 
 
 68 
 
 10 47.0 
 
 27.O 
 
 31.5 
 
 
 
 6976 
 
 3 51-5 
 
 25.O 
 
 27.5 
 
 
 
 98 
 116 
 
 20 97.0 
 
 21 74.4 
 
 37-0 
 
 21 .O 
 
 
 
 6983 
 
 27 61.0 
 
 34-0 
 
 17.0 
 
 (30" late; doubt- 
 ( ful. 
 
 
 122 
 
 20 89.5 
 
 
 
 
 
 6998 
 
 7 58.6 
 
 9-5 
 
 42.0 
 
 Doubtful. 
 
37 
 
 (15.) REDUCTION OF THE LATITUDE-OBSERVATIONS Continued. 
 Observations for Latitude Station, Cheyenne, Wyoming Territory, 
 
 Date. 
 
 No. of 
 star. 
 
 Vlicromctcr 
 reading. 
 
 Level. 
 
 Remarks. 
 
 Date. 
 
 No. of 
 star. 
 
 Vlicrometer 
 reading. 
 
 Level. 
 
 Remarks. 
 
 N. 
 
 s. 
 
 N. 
 
 S. 
 
 1872. 
 
 
 T. D. 
 
 
 
 
 1872. 
 
 
 T. D. 
 
 
 
 
 Oct. ii 
 
 7022 
 
 12 4.0 
 
 16.0 
 
 34.5 
 
 
 Oct. ii 
 
 8279 
 
 12 62.0 
 
 37-0 
 
 23.0 
 
 
 
 7041 
 
 24 43.0 
 
 32.0 
 
 19.5 
 
 
 
 8296 
 
 24 95-5 
 
 15.0 
 
 45-0 
 
 
 
 
 
 
 
 
 
 8301 
 
 29 10. o 
 
 35-0 
 
 25.0 
 
 
 
 
 
 
 
 
 
 8338 
 
 14 95.0 
 
 15.0 
 
 45-0 
 
 
 
 7101 
 
 27 51-8 
 
 
 
 
 
 8359 
 
 8 55.0 
 
 
 . 
 
 
 
 7114 
 
 5 60.5 
 
 22.5 
 
 30.0 
 
 
 
 
 
 
 
 
 
 7174 
 
 24 82.3 
 
 25.0 
 
 28.0 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 68 
 
 9 93-0 
 
 39-o 
 
 21.0 
 
 
 
 7198 
 
 o 81.5 
 
 20.0 
 
 33-5 
 
 
 
 98 
 116 
 
 2O 20.0 
 2O 96.6 
 
 13-0 
 
 48.0 
 
 
 
 7213 
 
 35 92.0 
 
 3I.O 
 
 22.0 
 
 
 
 122 
 
 2O 12.0 
 
 
 
 
 
 
 7253 
 
 28 1.5 
 
 
 
 
 
 
 158 
 
 19 95-0 
 
 25.0 
 
 35-5 
 
 
 
 7259 
 
 28 6.0 
 
 
 
 
 
 
 
 198 
 
 18 31.0 
 
 32.0 
 
 29.0 
 
 
 
 7290 
 
 23 86.8 
 
 
 
 
 
 
 
 
 
 
 
 7320 
 
 16 73.0 
 
 20.0 
 
 35-5 
 
 
 
 
 
 
 
 
 
 7336 
 
 15 98.0 
 
 
 , . 
 
 
 
 255 
 
 14 49.5 
 
 38.0 
 
 23.5 
 
 
 
 7337 
 
 15 87.0 
 
 
 
 
 
 
 264 
 
 22 88.2 
 
 19.0 
 
 42.O 
 
 
 
 7453 
 
 7 33-0 
 
 33-0 
 
 23.0 
 
 
 
 290 
 
 II 38.8 
 
 32.0 
 
 28.5 
 
 
 
 7462 
 
 33 18.9 
 
 14.0 
 
 43-0 
 
 
 
 299 
 
 25 45-5 
 
 23.0 
 
 35-0 
 
 
 
 7469 
 
 14 84.0 
 
 I4.O 
 
 43-0 
 
 
 
 
 
 
 
 
 
 7480 
 
 16 41.6 
 
 38.0 
 
 18.0 
 
 
 
 341 
 
 15 92.0 
 
 17.0 
 
 44-0 
 
 
 
 
 
 
 
 
 
 379 
 
 22 95.0 
 
 34-5 
 
 26.0 
 
 
 
 7555 
 
 12 32.0 
 
 42.O 
 
 14.0 
 
 
 
 
 
 
 
 
 
 7568 
 
 24 20.6 
 
 
 
 
 
 394 
 
 7 21.0 
 
 -50.0 
 
 IO.O 
 
 
 
 7569 
 
 26 5.0 
 
 7.0 
 
 49.0 
 
 
 
 427 
 
 20 93.0 
 
 3-0 
 
 57.o 
 
 
 
 
 
 
 
 
 
 431 
 
 25 5-0 
 
 . 
 
 
 
 
 7602 
 
 14 44.0 
 
 24.O 
 
 32.0 
 
 
 
 
 
 
 
 
 
 7681 
 
 23 77-8 
 
 26.O 
 
 31.0 
 
 
 
 444 
 
 12 6.O 
 
 39.0 
 
 22. 
 
 30" late. 
 
 
 7705 
 
 2 94.0 
 
 29.0 
 
 28.0 
 
 
 
 453 
 
 22 46.0 
 
 IO.O 
 
 51.0 
 
 15' late. 
 
 
 7731 
 
 33 25.2 
 
 I8. 5 
 
 38.0 
 
 
 
 502 
 
 6 99.5 
 
 22. 
 
 39-0 
 
 
 
 7746 
 
 4 67-9 
 
 3I.O 
 
 26.0 
 
 
 
 510 
 
 27 45-5 
 
 34-0 
 
 27-5 
 
 15' late. 
 
 
 7972 
 
 18 5-5 
 
 28.5 
 
 30.0 
 
 
 
 
 
 
 
 
 
 7978 
 
 10 53-5 
 
 25.O 
 
 33-0 
 
 
 
 572 
 
 26 86.0 
 
 24.0 
 
 38.5 
 
 
 
 7984 
 
 22 61.3 
 
 
 . 
 
 
 
 573 
 
 26 80.0 
 
 
 
 
 
 
 
 
 
 
 
 
 588 
 
 3 7-o 
 
 3O.O 
 
 32.0 
 
 
 
 8023 
 
 19 99.8 
 
 3I.O 
 
 27.0 
 
 
 
 611 
 
 16 28.6 
 
 
 
 
 
 
 8037 
 
 IS 51.5 
 
 22. 
 
 36.0 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Oct. 12 
 
 6491 
 
 ii 98.5 
 
 38.0 
 
 15.0 
 
 
 
 8131 
 
 29 68. o 
 
 23.O 
 
 37-0 
 
 
 
 6579 
 
 18 84.0 
 
 12. 
 
 42.0 
 
 
 
 8153 
 
 16 89.3 
 
 28.0 
 
 31-5 
 
 
 
 6626 
 
 35 39.0 
 
 15.0 
 
 41.0 
 
 
 
 8160 
 
 10 2.O 
 
 25.0 
 
 35-0 
 
 
 
 
 
 
 
 
 
 8195 
 
 17 27.5 
 
 30.0 
 
 30.0 
 
 
 
 6642 
 
 15 54.0 
 
 37-0 
 
 19.0 
 
 
 
 8223 
 
 16 91.8 
 
 27.O 
 
 34-0 
 
 
 
 6647 
 
 16 57.0 
 
 
 
 
 
 8237 
 
 22 48.8 
 
 . . 
 
 . . 
 
 
 
 6662 
 
 20 97.0 
 
 14.0 
 
 42.0 
 
 
 
 
 
 i 
 
 
 
 
 
 
 
 
38 
 
 (15.) REDUCTION OF THE LATITUDE-OBSERVATIONS Continued. 
 Observations for Latitude. Station, Cheyenne, Wyoming Territory. 
 
 
 
 
 Level. 
 
 
 
 
 
 Level 
 
 
 Date. 
 
 No. of 
 star. 
 
 Micrometer 
 reading. 
 
 
 Remarks. 
 
 Date. 
 
 No. of 
 star. 
 
 Micrometer 
 reading. 
 
 
 Remarks. 
 
 
 
 
 
 
 
 
 N. 
 
 S. 
 
 
 
 
 
 N. 
 
 S. 
 
 
 1872. 
 
 
 T. D. 
 
 
 
 
 1872. 
 
 
 T. D. 
 
 
 
 
 Oct. 12 
 
 6722 
 
 4 56.3 
 
 30.0 
 
 28.0 
 
 
 Oct. 12 
 
 7858 
 
 30 10.0 
 
 29.0 
 
 36.0 
 
 
 
 6754 
 
 25 88.5 
 
 19.0 
 
 39-0 
 
 
 
 7879 
 
 22 41.2 
 
 
 . 
 
 
 
 6771 
 
 26 91.0 
 
 31.0 
 
 27.0 
 
 
 
 7880 
 
 22 6.2 
 
 
 
 
 
 
 
 
 
 
 
 7906 
 
 3 16.0 
 
 33-0 
 
 33-0 
 
 
 
 6777 
 
 21 86.3 
 
 36.0 
 
 22.0 
 
 
 
 
 
 
 
 
 
 6830 
 
 18 77.8 
 
 16.0 
 
 42.O 
 
 
 
 7972 
 
 17 77.0 
 
 . 
 
 . 
 
 For level take 
 
 
 
 
 
 
 
 
 7973 
 
 10 28.0 
 
 . . 
 
 . . 
 
 the mean of 
 
 
 6924 
 
 15 12-5 
 
 37-5 
 
 21-5 
 
 
 
 7984 
 
 22 30.O 
 
 . . 
 
 
 preceding and 
 
 
 6940 
 
 29 37.0 
 
 16.0 
 
 44.0 
 
 
 
 
 
 
 
 following. 
 
 
 6943 
 
 23 12.2 
 
 42.0 
 
 I8. 5 
 
 
 
 8023 
 
 20 15.5 
 
 30.0 
 
 iS.o 
 
 
 
 6976 
 
 3 14.0 
 
 16.0 
 
 44.0 
 
 
 
 8037 
 
 is 71-5 
 
 13-5 
 
 34-5 
 
 
 
 6983 
 
 29 58.8 
 
 21. 
 
 39-5 
 
 30" late. 
 
 
 8131 
 
 29 81.5 
 
 31.0 
 
 19.0 
 
 
 
 6998 
 
 9 67.0 
 
 36.0 
 
 25.0 
 
 
 
 8153 
 
 16 96.5 
 
 16.0 
 
 33-5 
 
 
 
 
 
 
 
 
 
 8160 
 
 10 12.5 
 
 29.5 
 
 19.5 
 
 
 
 7022 
 
 II 56.0 
 
 28.0 
 
 32.0 
 
 
 
 
 
 
 
 
 
 7041 
 
 24 9.0 
 
 23.0 
 
 38.0 
 
 
 
 8195 
 
 17 25.0 
 
 30.0 
 
 19.0 
 
 
 
 
 
 
 
 
 
 8223 
 
 16 88.3 
 
 15.5 
 
 34-0 
 
 
 
 7101 
 
 25 39-5 
 
 
 . . 
 
 
 
 8237 
 
 22 48.0 
 
 . 
 
 
 
 
 7H4 
 
 3 53-5 
 
 25.0 
 
 37-0 
 
 
 
 
 
 
 
 
 
 7174 
 
 22 69.5 
 
 34-0 
 
 29.0 
 
 
 
 8279 
 
 12 77.0 
 
 22.5 
 
 26.5 
 
 
 
 
 
 
 
 
 
 8296 
 
 25 13-5 
 
 . 
 
 
 
 
 7198 
 
 I 63.8 
 
 22.5 
 
 39-5 
 
 
 
 8301 
 
 29 30.5 
 
 23.0 
 
 26.0 
 
 
 
 7213 
 
 36 65.0 
 
 35-0 
 
 27.0 
 
 
 
 8338 
 
 14 99-5 
 
 23-5 
 
 26.5 
 
 
 
 
 
 
 
 
 
 8359 
 
 8 62.0 
 
 23.0 
 
 26.0 
 
 
 
 7253 
 
 33 67.8 
 
 . . 
 
 
 
 
 
 
 
 
 
 
 7259 
 
 33 86.0 
 
 38.0 
 
 24.0 
 
 
 
 158 
 
 20 7.8 
 
 3L5 
 
 19.0 
 
 
 
 7273 
 
 2 97-0 
 
 
 . 
 
 
 
 198 
 
 18 53-5 
 
 12.5 
 
 38.0 
 
 
 
 7290 
 
 29 67.2 
 
 
 
 
 
 255 
 
 14 6.5 
 
 29.0 
 
 23.0 
 
 
 
 7320 
 
 22 47.0 
 
 . 18.5 
 
 44-5 
 
 
 
 264 
 
 22 32.5 
 
 17.5 
 
 33-5 
 
 
 
 7336 
 
 20 70.5 
 
 
 
 
 
 
 
 
 
 
 
 
 7337 
 
 2O 58.0 
 
 
 
 
 
 
 
 290 
 
 II 61.5 
 
 26.5 
 
 23.0 
 
 
 
 
 
 
 
 
 
 299 
 
 25 6g.O 
 
 20. o 
 
 29.0 
 
 
 
 7453 
 
 5 88.4 
 
 24.0 
 
 41.0 
 
 
 
 
 
 
 
 
 
 7462 
 
 3i 72.7 
 
 . 
 
 . 
 
 
 
 34i 
 
 14 97.0 
 
 23.0 
 
 27.0 
 
 
 
 7469 
 
 J3 30.5 
 
 34-0 
 
 31.0 
 
 
 
 379 
 
 21 90.5 
 
 21. 
 
 30.0 
 
 
 
 7480 
 
 14 95.6 
 
 
 
 
 
 
 394 
 
 7 96.0 
 
 26.5 
 
 23-5 
 
 
 
 
 
 
 
 
 
 427 
 
 21 75-5 
 
 
 
 
 
 7555 
 
 12 2O. O 
 
 32.5 
 
 32.5 
 
 
 
 431 
 
 25 84.0 
 
 13.0 
 
 37-0 
 
 
 
 7568 
 
 24 13-5 
 
 . 
 
 . 
 
 
 
 
 
 
 
 
 
 7569 
 
 25 98.0 
 
 25.0 
 
 40.0 
 
 
 
 444 
 
 ii 71.0 
 
 25.0 
 
 25-0 
 
 
 
 
 
 
 
 
 
 453 
 
 22 29.5 
 
 ig.O 
 
 31.0 
 
 
 
 7602 
 
 13 79.0 
 
 29.0 
 
 35-5 
 
 
 
 502 
 
 6 74.0 
 
 17.0 
 
 34-0 
 
 
 
 7681 
 
 22 28.5 
 
 30.5 
 
 36.0 
 
 
 
 51 
 
 27 17.0 
 
 36.0 
 
 15.0 
 
 
 
 7705 
 
 2 34-5 
 
 
 . 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 572 
 
 26 10.0 
 
 ig.O 
 
 32.0 
 
 
 
 7721 
 
 33 . 4 
 
 
 . 
 
 
 
 573 
 
 25 95.5 
 
 . 
 
 
 
 
 7731 
 
 33 27.3 
 
 38.5 
 
 27.0 
 
 
 
 588 
 
 2 28.O 
 
 25.0 
 
 26.0 
 
 
 
 7746 
 
 4 64.0 
 
 27.0 
 
 39-o 
 
 
 
 611 
 
 15 45-5 
 
 
 
 
 
 
39 
 
 (15.) REDUCTION OF THE LATITUDE-OBSERVATIONS' Continued. 
 Computations for Latitude of Cheyenne, Wyoming Territory. 
 
 Date. 
 
 Number 
 of pair. 
 
 Half-sum of dec- 
 linations. 
 
 Corrections. 
 
 Latitude. 
 
 Mic. and ref. 
 
 Level. 
 
 Meridian. 
 
 1872. 
 
 
 
 
 / // 
 
 /, 
 
 
 
 1 U 
 
 Oct. i 
 
 13 
 
 40 57 50-5 
 
 + 9 53-10 
 
 + 1.65 
 
 o.oo 
 
 41 7 45-3 
 
 
 12 
 
 41 9 12.3 
 
 i 27.24 
 
 + 1.65 
 
 o.oo 
 
 46.6 
 
 
 I? 
 
 16 57.6 
 
 - 9 14.28 
 
 + o 83 
 
 o.oo 
 
 44.1 
 
 
 2O 
 
 12 2Q.8 
 
 4 46, 63 
 
 + 0.82 
 
 o.oo 
 
 44-o 
 
 
 21 
 
 22 38.5 
 
 - 14 55-10 
 
 -t- 0.28 
 
 o.oo 
 
 43-7 
 
 
 22 
 
 8 20.7 
 
 o 41.27 
 
 + 5.20 
 
 o.oo 
 
 44-6 
 
 
 25 
 
 16 28.2 
 
 - 8 32.57 
 
 - 8.25 
 
 o.oo 
 
 47-4 
 
 
 24 
 
 3 5-3 
 
 + 4 50.47 
 
 - 8.25 
 
 o.oo 
 
 47-5 
 
 
 26 
 
 14 o. i 
 
 6 .67 
 
 - 8.80 
 
 o.oo 
 
 48.6 
 
 
 3' 
 
 22 35.8 
 
 - 14 42.54 
 
 8.50 
 
 o.oo 
 
 44.8 
 
 
 30 
 
 22 31.1 
 
 - 14 35,77 
 
 - 8.50 
 
 o.oo 
 
 46.7 
 
 
 35 
 
 6 0.8 
 
 + i 58.72 
 
 12.92 
 
 o.oo 
 
 46.6 
 
 
 36 
 
 3 55-5 
 
 + 4 1.18 
 
 11.22 
 
 o.oo 
 
 45-5 
 
 
 37 
 
 10 7.8 
 
 2 10.69 
 
 II. 2O 
 
 o.oo 
 
 45.9 
 
 
 39 
 
 14 27.6 
 
 6 30.52 
 
 I I . OO 
 
 o.oo 
 
 46.1 
 
 
 40 
 
 4 J5-3 
 
 + 3 41-82 
 
 10.50 
 
 o.oo 
 
 46.6 
 
 
 41 
 
 7 56.2 
 
 +o 0.90 
 
 - 10.45 
 
 o.oo 
 
 46.6 
 
 
 42 
 
 5 3-5 
 
 + 2 52.84 
 
 10.40 
 
 o.oo 
 
 45-9 
 
 
 43 
 
 14 10. o 
 
 - 6 13.36 
 
 10.70 
 
 o.oo 
 
 45-9 
 
 
 45 
 
 15 10.4 
 
 - 7 11.36 
 
 11.70 
 
 o.oo 
 
 47-3 
 
 
 46 
 
 13 8.4 
 
 5 9-62 
 
 10.70 
 
 o.oo 
 
 48.1 
 
 
 48 
 
 13 32-6 
 
 - 5 34-22 
 
 10.70 
 
 o.oo 
 
 47-7 
 
 
 49 
 
 13 5-3 
 
 - 5 5-n 
 
 10.70 
 
 o.oo 
 
 49-5 
 
 
 50 
 
 55 58.3 
 
 + 12 0.50 
 
 10.70 
 
 o.oo 
 
 48.1 
 
 
 51 
 
 8 36.5 
 
 o 39.10 
 
 10.70 
 
 o.oo 
 
 46.7 
 
 
 52 
 
 12 5.4 
 
 4 10.26 
 
 - 8.25 
 
 o.oo 
 
 46.8 
 
 Oct. 3 
 
 3 
 
 41 5 o.o 
 
 + 2 42.92 
 
 + 4-40 
 
 o.oo 
 
 4i 7 47-3 
 
 
 4 
 
 5 33-2 
 
 + 2 10.47 
 
 + 4-40 
 
 0.00 
 
 48.1 
 
 
 5 
 
 40 56 49-8 
 
 + 10 53.18 
 
 + 4-95 
 
 o.oo 
 
 47-9 
 
 
 6 
 
 41 8 22. O 
 
 - o 39.13 
 
 + 4.00 
 
 o.oo 
 
 46.9 
 
 
 9 
 
 21 22.7 
 
 - 13 4L23 
 
 + 2.80 
 
 o.oo 
 
 44-3 
 
 
 9 
 
 18 28.3 
 
 10 46.02 
 
 + 2.80 
 
 o.oo 
 
 45-1 
 
 
 12 
 
 9 12.5 
 
 I 30.66 
 
 + 2.OO 
 
 + O.IO 
 
 43-9 
 
 
 I? 
 
 12 34.2 
 
 - 4 '53.o8 
 
 + 3.98 
 
 o.oo 
 
 45.1 
 
 
 *) 
 
 12 30.0 
 
 4 50.91 
 
 + 3.98 
 
 0.00 
 
 43-1 
 
 
 22 
 
 8 21.0 
 
 o 39.10 
 
 + 5.91 
 
 o.oo 
 
 47-8 
 
 
 23 
 
 15 40.9 
 
 7 57-04 
 
 + 3.85 
 
 o.oo 
 
 47-7 
 
 
 26 
 
 14 0.4 
 
 6 18.52 
 
 + 4-95 
 
 o.oo 
 
 46.8 
 
 
 28 
 
 12 13.3 
 
 4 28.62 
 
 + 2.33 
 
 o.oo 
 
 47-0 
 
 
 31 
 
 22 36.3 
 
 - M 53.71 
 
 + 2.20 
 
 o.oo 
 
 44-8 
 
 
 31 
 
 22 30.8 
 
 - 14 47.36 
 
 + 2. 2O 
 
 o.oo 
 
 45-6 
 
 
 32 
 
 22 15.0 
 
 - M 35-71 
 
 + 5.20 
 
 o.oo 
 
 44-5 
 
40 
 
 (15.) REDUCTION OF THE LATITUDE-OBSERVATIONS Continued. 
 Computations for Latitude of Cheyenne, Wyoming Territory. 
 
 Date. 
 
 Number 
 of pair. 
 
 Hall-sum of dec- 
 linations. 
 
 Corrections. 
 
 Latitude. 
 
 Mic. and ref. 
 
 Level. 
 
 Meridian. 
 
 1872. 
 
 
 i a 
 
 . // 
 
 
 
 
 
 / II 
 
 Oct. 3 
 
 33 
 
 41 17 45-9 
 
 10 1.71 
 
 + 5-20 
 
 o.oo 
 
 41 7 49-4 
 
 
 34 
 
 17 33-5 
 
 9 51.76 
 
 + 5.50 
 
 o.oo 
 
 47.2 
 
 
 36 
 
 3 55-9 
 
 + 3 51-91 
 
 I.IO 
 
 o.oo 
 
 46.7 
 
 
 37 
 
 10 8.4 
 
 2 20.36 
 
 I.IO 
 
 o.oo 
 
 46.9 
 
 
 38 
 
 7 0.3 
 
 + o 42.33 
 
 + 3.57 
 
 o.oo 
 
 46.2 
 
 
 39 
 
 14 28.0 
 
 - 6 42.95 
 
 + 3.10 
 
 o.oo 
 
 48.2 
 
 
 40 
 
 4 15-7 
 
 + 3 29.63 
 
 + 2.OO 
 
 o.oo 
 
 47.3 
 
 
 41 
 
 7 56.6 
 
 o 12.28 
 
 + 2.75 
 
 o.oo 
 
 47-1 
 
 
 42 
 
 5 3-9 
 
 + 2 39.81 
 
 + 2.70 
 
 o.oo 
 
 46.4 
 
 
 43 
 
 14 10.4 
 
 - 6 26.54 
 
 + 4.67 
 
 o.oo 
 
 48.6 
 
 
 44 
 
 15 10.8 
 
 - 7 28.64 
 
 + 3-57 
 
 o.oo 
 
 45.7 
 
 
 45 
 
 18 28.8 
 
 10 47.46 
 
 + 3-6o 
 
 o.oo 
 
 44.9 
 
 
 46 
 
 13 g.o 
 
 5 26.68 
 
 + 2.60 
 
 o.oo 
 
 44.9 
 
 
 47 
 
 25 45-9 
 
 18 0.87 
 
 + 2.60 
 
 o.oo 
 
 47-6 
 
 
 48 
 
 13 33-1 
 
 5 52.29 
 
 + 2.60 
 
 o.oo 
 
 43.4 
 
 
 49 
 
 13 5-8 
 
 5 25.00 
 
 + 2.60 
 
 o.oo 
 
 43-4 
 
 
 5 
 
 8 37.0 
 
 - o 52.77 
 
 + 3-71 
 
 o.oo 
 
 47-9 
 
 
 52 
 
 12 5.8 
 
 - 4 22.94 
 
 + 2.60 
 
 o.oo 
 
 45-5 
 
 
 53 
 
 15 4-4 
 
 7 23.20 
 
 + 4-40 
 
 o.oo 
 
 45-6 
 
 Oct. 8 
 
 5 
 
 40 56 49.9 
 
 + to 53.86 
 
 + 2.88 
 
 o.oo 
 
 41 7 46.6 
 
 
 6 
 
 41 8 22.2 
 
 o 38.13 
 
 + 3-6o 
 
 o.oo 
 
 47-7 
 
 
 7 
 
 9 26,4 
 
 - i 41.17 
 
 + 1.78 
 
 o.oo 
 
 47-0 
 
 
 8 
 
 15 12.7 
 
 - 7 3i.i3 
 
 + 2.47 
 
 o.oo 
 
 44.0 
 
 
 9 
 
 18 28.6 
 
 - 10 43.42 
 
 + 3.71 
 
 o.oo 
 
 48.9 
 
 
 II 
 
 I 22.3 
 
 + 6 23.06 
 
 + 1.65 
 
 o.oo 
 
 47-0 
 
 
 12 
 
 9 13.0 
 
 i 32.62 
 
 + 5-91 
 
 o.oo 
 
 46.3 
 
 
 13 
 
 40 57 51-3 
 
 + 9 5L76 
 
 + 6. 20 
 
 o.oo 
 
 49-3 
 
 
 17 
 
 41 3 II- 1 
 
 + 4 31-83 
 
 + 4.80 
 
 o.oo 
 
 47-7 
 
 
 20 
 
 12 30.7 
 
 4 49.67 
 
 + 4.80 
 
 o.oo 
 
 45-8 
 
 
 23 
 
 15 41-6 
 
 - 7 56.92 
 
 + 2.30 
 
 o.oo 
 
 47-0 
 
 
 26 
 
 14 1.2 
 
 6 16.38 
 
 + 3-00 
 
 o.oo 
 
 47-8 
 
 
 30 
 
 22 36.3 
 
 14 56.04 
 
 + 3-30 
 
 o.oo 
 
 43-6 
 
 
 3' 
 
 22 31.6 
 
 14 47.90 
 
 + 3-30 
 
 o.oo 
 
 47.0 
 
 
 33 
 
 17 34-5 
 
 - 9 54-25 
 
 + 5.50 
 
 o.oo 
 
 45-8 
 
 
 34 
 
 17 46.9 
 
 - 10 4.35 
 
 + 5-3 
 
 o.oo 
 
 47-9 
 
 
 36 
 
 3 56.5 
 
 + 3 47-47 
 
 + 5-30 
 
 o.oo 
 
 49-3 
 
 
 37 
 
 10 9.5 
 
 - 2 28.75 
 
 + 5.20 
 
 o.oo 
 
 46.0 
 
 
 33 
 
 7 1.2 
 
 + o 39.16 
 
 + 4.10 
 
 o.oo 
 
 44-5 
 
 
 39 
 
 14 29.1 
 
 - 6 41-55 
 
 + I.OO 
 
 o.oo 
 
 48.5 
 
 
 40 
 
 4 16.9 
 
 + 3 29.79 
 
 - 0.33 
 
 o.oo 
 
 46.4 
 
 
 4' 
 
 7 57-8 
 
 o 16.63 
 
 + 4.40 
 
 o.oo 
 
 45-6 
 
 
 42 
 
 5 5-1 
 
 + 2 36.74 
 
 + 4.40 
 
 o.oo 
 
 46.2 
 
41 
 
 (15.) REDUCTION OF THE LATITUDE-OBSERVATIONS Continued. 
 Computations for Latitude of Cheyenne, Wyoming Territory. 
 
 Date. 
 
 Number 
 of pair. 
 
 Half-sum of dec- 
 linations. 
 
 Corrections. 
 
 Latitude. 
 
 Mic. and ref. 
 
 Level. 
 
 Meridian. 
 
 1872. 
 
 
 , 
 
 i a 
 
 
 
 
 
 Of // 
 
 Oct. 8 
 
 43 
 
 41 14 11.5 
 
 f> 30.15 
 
 + 6.50 
 
 o. oo 
 
 41 7 47-8 
 
 
 44 
 
 14 42.0 7 59.49 
 
 + 3-90 
 
 0.00 
 
 46.4 
 
 
 45 
 
 18 30.0 - 10 46.53 
 
 + 3-10 
 
 o.oo 
 
 46.6 
 
 
 46 
 
 13 IO.2 
 
 - 5 25.56 
 
 + 1. 80 
 
 o.oo 
 
 46.4 
 
 
 4 3 
 
 13 34-4 
 
 - 5 49.96 
 
 H- 1. 80 
 
 o.oo 
 
 46.2 
 
 
 49 
 
 13 7-' 
 
 - 5 23.10 
 
 + 1.89 
 
 0.00 
 
 45-8 
 
 
 5' 
 
 8 38.2 
 
 o 52.52 
 
 + 2.OO 
 
 o.oo 
 
 47-7 
 
 
 52 
 
 12 7-0 
 
 4 21.69 
 
 - 1-37 
 
 o.oo 
 
 43-9 
 
 
 53 
 
 '5 5-2 
 
 7 21.71 
 
 + 4.10 
 
 4- o. to 
 
 47-7 
 
 
 54 
 
 4 13.3 
 
 + 3 33-05 
 
 + 0.55 
 
 o.oo 
 
 46.9 
 
 
 55 
 
 17 7.6 
 
 - 9 23.48 
 
 + 4-10 
 
 o.oo 
 
 48.2 
 
 
 53 
 
 57 3 
 
 +10 34.96 
 
 4- 1.50 
 
 o.oo 
 
 47.8 
 
 
 59 
 
 20 5.7 
 
 12 25.O8 
 
 + 5.20 
 
 0.00 
 
 45-8 
 
 
 60 
 
 13 17.8 
 
 5 30.22 
 
 4- 2. 2O 
 
 o.oo 
 
 49.8 
 
 
 61 
 
 7 50.3 
 
 - o 4.75 
 
 4- 1.50 
 
 o.oo 
 
 47-1 
 
 Oct. 9 
 
 4 
 
 41 5 33-3 
 
 + 2 15.20 
 
 O.gO 
 
 o.oo 
 
 41 7 47-6 
 
 
 5 ' 
 
 40 56 49.9 
 
 4- " 5L53 
 
 4- 2.10 
 
 o.oo 
 
 43-5 
 
 
 6 
 
 41 8 22.2 
 
 o 40 . 62 
 
 4- 5.50 
 
 o.oo 
 
 47.1 
 
 * 
 
 8 
 
 5 12.8 
 
 - 7 30.19 
 
 + I . IO 
 
 o.oo 
 
 43-7 
 
 
 
 1 
 
 
 
 
 
 9 
 
 18 28.7 j - 10 44.44 
 
 4- 2.90 
 
 o.oo 
 
 47-2 
 
 
 II 
 
 I 22.4 
 
 4- 6 24.71 
 
 4 2.IO 
 
 o.oo 
 
 49-2 
 
 
 14 
 
 25 58.0 
 
 - 'S M.33 
 
 4- 2.80 
 
 o.oo 
 
 46.5 
 
 
 15 
 
 2 1.3 
 
 + 5 43-50 
 
 + 5.50 
 
 o.oo 
 
 50.3 
 
 
 16 
 
 I 55-2 
 
 4 5 43-18 ' 
 
 4- 5-50 
 
 o.oo 
 
 43-9 
 
 
 >9 
 
 3 7-2 
 
 + 4 34-75 
 
 4- 5 5<? 
 
 0.00 
 
 47-5 
 
 
 26 
 
 14 1.4 
 
 6 16.94 
 
 4 5-50 
 
 o.oo 
 
 50.0 
 
 
 32 
 
 22 I6.I 
 
 - 14 31-79 
 
 4- 2.6o 
 
 o.oo 
 
 46.9 
 
 
 33 
 
 '7 34-7 
 
 - 9 52.85 
 
 + 2.6o 
 
 o.oo 
 
 44-5 
 
 
 34 
 
 17 47-1 
 
 10 2.33 
 
 4 2.6o 
 
 o.oo 
 
 47-4 
 
 
 36 
 
 3 56.8 
 
 + 3 43.46 
 
 4- 4.10 
 
 o.oo 
 
 44.4 
 
 
 37 
 
 10 9.7 
 
 2 24 . 2 1 
 
 4- 4. 10 
 
 o.oo 
 
 49.6 
 
 
 38 
 
 7 i-4 
 
 + o 40.71 
 
 4 6.30 
 
 o.oo 
 
 48.4 
 
 
 39 
 
 14 29.3 
 
 6 48 . 70 
 
 4 2.8o 
 
 o.oo 
 
 43-4 
 
 
 4' 
 
 4 17-0 
 
 + 3 28.55 
 
 4 2.8o 
 
 o.oo 
 
 48.4 
 
 
 42 
 
 7 58.1 
 
 o 13.36 
 
 4 o.io 
 
 o.oo 
 
 44.9 
 
 
 43 
 
 5' 5-3 
 
 + 2 39.75 
 
 4- o.io 
 
 o.oo 
 
 45.2 
 
 
 44 
 
 14 II. 8 
 
 6 29.74 
 
 4- 3-30 
 
 o.oo 
 
 45-4 
 
 
 44 
 
 15 12.2 
 
 - 7 29.35 
 
 4 5-50 
 
 4 O.IO 
 
 48.3 
 
 
 45 
 
 1 8 30.2 
 
 10 51.90 
 
 + 5-50 
 
 o.oo 
 
 43-8 
 
 
 46 
 
 13 10.4 
 
 - 5 30.07 
 
 4 5.30 
 
 o.oo 
 
 45.6 
 
 
 48 
 
 13 34-7 
 
 5 51.48 
 
 4 5-30 
 
 o.oo 
 
 48.5 
 
 
 49 
 
 13 7-4 
 
 - 5 25-10 
 
 4 5.30 
 
 o.oo 
 
 47.6 
 
42 
 
 (15.) REDUCTION OF THE LATITUDE-OBSERVATIONS Continued. 
 Confutations for Latitude of Chcyi'iinc, Wyoming Territory. 
 
 Date. 
 
 Number 
 of pair. 
 
 rlalf-sum of dec- 
 linations. 
 
 Corrections. 
 
 Latitude. 
 
 Mic. and vef. 
 
 Level. 
 
 Meridian. 
 
 1872. 
 
 
 , 
 
 1 IT 
 
 ,, 
 
 .. 
 
 1 II 
 
 Oct. 9 
 
 5i 
 
 41 3 38.5 
 
 - o 55.29 
 
 + 4-67 
 
 o.oo 
 
 41 7 47-9 
 
 
 52 
 
 12 7.3 
 
 4 26.82 
 
 4- 7-6o 
 
 o.oo 
 
 4 S.i 
 
 
 54 
 
 4 13.4 
 
 + 3 31.03 
 
 + 2.75 
 
 o.oo 
 
 47.2 
 
 
 55 
 
 M 59-5 
 
 7 15-71 
 
 + i. 80 
 
 o.oo 
 
 45-6 
 
 
 56 
 
 '7 7-8 
 
 9 24.88 
 
 + 1-79 
 
 o.oo 
 
 44-7 
 
 
 57 
 
 I* 17-4 
 
 - 5 34.89 
 
 + I. CO 
 
 0.00 
 
 43-5 
 
 
 60 
 
 20 10. I 
 
 - 12 24.21 
 
 4- 0.70 
 
 o.oo 
 
 46.6 
 
 
 59 
 
 13 iS.o 
 
 5 32.40 
 
 4- 0.70 
 
 o.oo 
 
 46.3 
 
 Oct. 10 
 
 I 
 
 40 55 42.9 
 
 + 12 1.99 
 
 + 3-30 
 
 o.oo 
 
 41 7 48.2 
 
 
 4 
 
 41 5 33-2 
 
 + -2 10.54 
 
 + 2.47 
 
 o.oo 
 
 46.2 
 
 
 5 
 
 40 56 49.9 
 
 4- 10 52.37 
 
 4- 4-io 
 
 o.oo 
 
 46.4 
 
 
 6 
 
 41 8 22.2 
 
 - o 39.47 
 
 + 4.10 
 
 o.oo 
 
 46.8 
 
 
 7 
 
 9 26.4 
 
 I 44.80 
 
 4- 4.10 
 
 o.oo 
 
 45-7 
 
 
 8 
 
 15 12.8 
 
 - 7 28.65 
 
 4- 2.6o 
 
 o.oo 
 
 46.8 
 
 
 9 
 
 18 28.8 
 
 10 46.93 
 
 + 2.6O 
 
 o.oo 
 
 44-5 
 
 
 it 
 
 I 22.5 
 
 + 6 19.80 
 
 4- 3-40 
 
 0.00 
 
 45-7 
 
 
 12 
 
 9 13.2 
 
 I 28.67 
 
 + 2.86 
 
 o.oo 
 
 47-4 
 
 
 13 
 
 40 57 51-5 
 
 + 9 5L92 
 
 4- 2 . (JO 
 
 o.oo 
 
 46.3 
 
 
 15 
 
 41 2 1.4 
 
 + 5 41.22 
 
 4- 3-40 
 
 o.oo 
 
 46.0 
 
 
 16 
 
 I 57-3 
 
 + 5 45-94 
 
 + 3-40 
 
 o.oo 
 
 46.6 
 
 
 17 
 
 3 n-3 
 
 + 4 31 39 
 
 4- 3-40 
 
 o.oo 
 
 46.1 
 
 
 25 
 
 16 29.6 
 
 8 49.60 
 
 + 5.10 
 
 o.oo 
 
 45-1 
 
 
 26 
 
 M 1-5 
 
 - 6 18.55 
 
 + 4.40 
 
 o.oo 
 
 47-3 
 
 
 33 
 
 '7 47-2 
 
 10 4.19 
 
 + 5.50 
 
 o.oo 
 
 48.5 
 
 
 34 
 
 17 34-8 
 
 - 9 54.40 
 
 4- 5-50 
 
 o.oo 
 
 45-9 
 
 
 36 
 
 3 57-5 
 
 + 3 47.51 
 
 + 1. 80 
 
 o.oo 
 
 46.8 
 
 
 37 
 
 10 9.8 
 
 2 25.14 
 
 4- 1.78 
 
 o.oo 
 
 46.4 
 
 
 38 
 
 7 1.6 
 
 4- o 39.16 
 
 4- 4.40 
 
 o.oo 
 
 45-2 
 
 
 39 
 
 14 29.5 
 
 - 6 45-53 
 
 4- 1.50 
 
 o.oo 
 
 45-5 
 
 
 40 
 
 4 17-2 
 
 + 3 25.13 
 
 4- 4-9 
 
 o.oo 
 
 47-2 
 
 
 43 
 
 14 12. O 
 
 6 30.12 
 
 + 5-30 
 
 o.oo 
 
 47.2 
 
 
 44 
 
 15 12. 4 
 
 - 7 30.50 
 
 4- 4-30 
 
 o.oo 
 
 46.2 
 
 
 45 
 
 18 30.4 
 
 lo 49.42 
 
 + 4-30 
 
 o.oo 
 
 45-3 
 
 
 46 
 
 13 10.7 
 
 - 5 26.34 
 
 + 3-20 
 
 0.00 
 
 47.6 
 
 
 48 
 
 13 34-9 
 
 5 50.40 
 
 + 3.20 
 
 o.oo 
 
 47-7 
 
 
 49 
 
 13 7-6 
 
 5 24.01 
 
 + 3-20 
 
 o.oo 
 
 46.8 
 
 
 50 
 
 8 38.7 
 
 o 53.61 
 
 + 1.38 
 
 o.oo 
 
 46.5 
 
 
 52 
 
 12 7.5 
 
 4 28.22 
 
 + 4- 2O 
 
 o.oo 
 
 43-5 
 
 
 53 
 
 15 5-5 
 
 7 24.41 
 
 + 5-94 
 
 o.oo 
 
 47-0 
 
 
 54 
 
 4 13-4 
 
 + 3 28.86 
 
 + 2.75 
 
 o.oo 
 
 45.0 
 
 
 55 
 
 '4 59-7 
 
 7 16.02 
 
 + 2.33 
 
 o.oo 
 
 46.0 
 
 
 56 
 
 17 S.o 
 
 - 9 23.95 
 
 + 2.30 
 
 o.oo 
 
 46.4 
 
43 
 
 (i5-) REDUCTION of THE LATITUDE-OBSERVATIONS Continued. 
 Computations for Latitude of Clwyenne, Wyoming Territory. 
 
 Date. 
 
 lumber 
 of pir. 
 
 Half-sum of dec- 
 linations. 
 
 Corrections. 
 
 Latitude. 
 
 Mic. and ref. 
 
 Level. 
 
 Meridian. 
 
 1872. 
 
 
 
 
 , 
 
 : 
 
 u 
 
 , 
 
 Oct. 10 
 
 5? 
 
 4' 13 i7- 
 
 - 5 33-33 
 
 + 1.65 
 
 o.oo 
 
 41 7 45-9 
 
 
 58 
 
 40 57 ii. 5 
 
 4- 10 33.88 
 
 4- 1 .30 
 
 o.oo 
 
 46.7 
 
 
 60 
 
 41 20 10.5 
 
 - 12 24-74 
 
 4- O.60 
 
 0.00 
 
 46.4 
 
 
 59 
 
 13 lS.2 
 
 5 3'-3i 
 
 4- 0.55 
 
 o.oo 
 
 47-4 
 
 Oct. ii 
 
 i 
 
 41 4 12. I 
 
 4- 3 29.01 
 
 4- 5-50 
 
 o.oo 
 
 41 7 4^-6 
 
 
 2 
 
 40 55 42.9 
 
 4- ii 58.41 
 
 + 5oO 
 
 o.oo 
 
 46.8 
 
 
 3 
 
 4' 5 0-0 
 
 4- 2 41.71 
 
 4- 5.08 
 
 o.oo 
 
 46.8 
 
 
 5 
 
 40 56 50.0 
 
 + II 1.38 
 
 - 2.75 
 
 o.oo 
 
 48.6 
 
 
 6 
 
 41 22.3 
 
 - o 32.54 
 
 - 2.70 
 
 o.oo 
 
 47-1 
 
 
 7 
 
 9 26,4 
 
 - I 38.71 
 
 - 2.33 
 
 o.oo 
 
 45-4 
 
 
 3 
 
 15 12.9 
 
 7 23 . a2 
 
 - 3-74 
 
 o.oo 
 
 45-3 
 
 
 9 
 
 18 28.9 
 
 - 10 38.54 
 
 3.20 
 
 o.oo 
 
 47-2 
 
 
 10 
 
 40 57 30.0 
 
 4- 10 22.34 
 
 4-40 
 
 0.00 
 
 48.0 
 
 
 ii 
 
 41 i 22.3 
 
 + 6 25.08 
 
 - i.5 
 
 o.oo 
 
 45-9 
 
 
 12 
 
 9 13-3 
 
 I 23.76 
 
 2.90 
 
 o.oo 
 
 46.6 
 
 
 '3 
 
 40 57 51.6 
 
 4- 9 57.30 
 
 - 2.88 
 
 o.oo 
 
 46.0 
 
 
 M 
 
 41 25 58.2 
 
 18 n.o'6 
 
 1.23 
 
 o.oo 
 
 45-9 
 
 
 15 
 
 2 1.5 
 
 4- 5 50.74 
 
 - 3-40 
 
 o.oo 
 
 48.8 
 
 
 16 
 
 I 57-4 
 
 + 5 52.14 
 
 - 3-40 
 
 o.oo 
 
 46.1 
 
 
 18 
 
 3 Ii. 4 
 
 4- 4 36.26 
 
 - 3-40 
 
 o.oo 
 
 44-3 
 
 
 24 
 
 3 6.8 
 
 4- 4 42.39 
 
 - 2.40 
 
 o.oo 
 
 40.8 
 
 
 26 
 
 14 1.7 
 
 - 6 9.42 
 
 3.80 
 
 o.oo 
 
 48.5 
 
 
 31 
 
 22 37.7 
 
 14 48.05 
 
 - 3.98 
 
 o.oo 
 
 45-7 
 
 
 36 
 
 IO IO.O 
 
 2 21.66 
 
 2.6o 
 
 o.oo 
 
 45-7 
 
 
 33 
 
 7 i-7 
 
 4- o 46.09 
 
 - 2.75 
 
 o.oo 
 
 45-0 
 
 
 39 
 
 14 29.8 
 
 - 6 37.42 
 
 4.80 
 
 0.00 
 
 47-6 
 
 
 40 
 
 4 17-4 
 
 4- 3 33-6i 
 
 - 3-70 
 
 o.oo 
 
 47-5 
 
 
 41 
 
 7 53.6 
 
 -*- II.I-O 
 
 2.OO 
 
 o.oo 
 
 45-5 
 
 
 42 
 
 5 5-8 
 
 + 2 42.02 
 
 2.OO 
 
 o.oo 
 
 45-8 
 
 
 43 
 
 14 12.3 
 
 - 6 23.37 
 
 - 4-40 
 
 0.00 
 
 44-5 
 
 
 44 
 
 15 12.7 
 
 - 7 19.78 
 
 - 5-50 
 
 o.oo 
 
 47-4 
 
 
 45 
 
 i 30.7 
 
 10 38.69 
 
 -" 5-50 
 
 o.oo 
 
 46-5 
 
 
 46 
 
 13 10.9 
 
 - 5 I-9-I9 
 
 4.67 
 
 o.oo 
 
 47-0 
 
 
 48 
 
 13 35-2 
 
 - 5 43-oo 
 
 4.60 
 
 0.00 
 
 47-6 
 
 
 49 
 
 13 7-9 
 
 5 16-70 
 
 4.60 
 
 o.oo 
 
 46.6 
 
 
 51 
 
 9 39-0 
 
 - o 50.97 
 
 S2.OO 
 
 O.OO 
 
 46.0 
 
 
 52 
 
 12 7.7 
 
 4 20.67 
 
 - 2.33 
 
 o.oo 
 
 44-7 
 
 
 53 
 
 15 5-8 
 
 - 7 17.20 
 
 - 2.33 
 
 o.oo 
 
 46.3 
 
 
 54 
 
 4 13-4 
 
 4- 3 38.49 
 
 -" 5-08 
 
 o.oo 
 
 46.8 
 
 
 55 
 
 15 0.0 
 
 7 6.42 
 
 - 3-85 
 
 o.oo 
 
 49-7 
 
 
 56 
 
 17 8.2 
 
 9 14-47 
 
 3.80 
 
 o.oo 
 
 49-9 
 
 
 57 
 
 13 17.8 
 
 5 23.24 
 
 - 6.60 
 
 o.oo 
 
 48.0 
 
44 
 
 (15.) REDUCTION OF THE LiATITUDE-OHSKRVATlONS Continued. 
 
 Computations for Latitude of Cheyenne, Wyoming Territory. 
 
 Date. 
 
 Numbc 
 of pair 
 
 Half-sum of dec 
 linations. 
 
 Corrections. 
 
 Latitude. 
 
 Mic. and ref. 
 
 Level. 
 
 Meridian 
 
 1872. 
 
 
 O I It 
 
 1 n 
 
 a 
 
 n 
 
 , 
 
 Oct. n 
 
 58 
 
 40 57 1 1. 7 
 
 + 10 35.90 
 
 2.90 
 
 o.oo 
 
 41 7 44-7 
 
 
 60 
 
 41 20 IO.5 
 
 - 12 19.39 
 
 - 4-53 
 
 0.00 
 
 46.6 
 
 
 59 
 
 13 18.4 
 
 - 5 26-77 
 
 - 4-50 
 
 o.oo 
 
 47-1 
 
 Oct. 12 
 
 2 
 
 40 55 42.9 
 
 + 12 7.43 
 
 0.90 
 
 o.oo 
 
 41 7 49-4 
 
 
 3 
 
 41 5 o.i 
 
 + 2 48.76 
 
 - 2.75 
 
 o.oo 
 
 46. 1 
 
 
 4 
 
 5 33-3 
 
 + 2 16.75 
 
 2.70 
 
 o.oo 
 
 47-3 
 
 
 5 
 
 40 56 50.0 
 
 +11 2.69 
 
 - 5.00 
 
 o.oo 
 
 47-7 
 
 
 6 
 
 41 8 22.3 
 
 o 31.86 
 
 4.40 
 
 o.oo 
 
 46.0 
 
 
 7 
 
 9 26.4 
 
 - I 35- SS 
 
 - 3-30 
 
 o.oo 
 
 47-2 
 
 
 8 
 
 15 I3.o 
 
 - 7 22.73 
 
 - 3.30 
 
 0.00 
 
 47-0 
 
 
 g 
 
 18 28.9 
 
 10 39.69 
 
 - 1-23 
 
 o.oo 
 
 48.0 
 
 
 10 
 
 ,|0 57 30.0 
 
 + 10 19.05 
 
 2. 2O 
 
 -t- O. 10 
 
 47.0 
 
 
 ii 
 
 41 I 22.6 
 
 + 6 29.43 
 
 - 5-40 
 
 o.oo 
 
 46.6 
 
 
 12 
 
 9 13.4 
 
 I 23.92 
 
 2.20 
 
 0.00 
 
 47-3 
 
 
 >3 
 
 40 57 51.7 
 
 + 9 55-49 
 
 2.OO 
 
 o.oo 
 
 45-2 
 
 
 14 
 
 41 25 58.3 
 
 18 8.17 
 
 - 2.47 
 
 o.oo 
 
 47.6 
 
 
 '5 
 
 2 1.6 
 
 + 5 4S.34 
 
 - 3-30 
 
 o.oo 
 
 46.6 
 
 
 16 
 
 I 57-5 
 
 + 5 54-00 
 
 - 3-30 
 
 o.oo 
 
 48.2 
 
 
 17 
 
 16 58.9 
 
 9 i i . 20 
 
 - 3-30 
 
 0.00 
 
 44-4 
 
 
 19 
 
 3 7-4 
 
 + 4 42-58 
 
 3-3 
 
 o.oo 
 
 46.7 
 
 
 24 
 
 3 6-9 
 
 + 4 41-96 
 
 3.80 
 
 o.oo 
 
 45-1 
 
 
 26 
 
 14 1.8 
 
 6 10.94 
 
 4.40 
 
 o.oo 
 
 46.5 
 
 
 28 
 
 12 14.9 
 
 4 24 . 02 
 
 - 3-30 
 
 o.oo 
 
 47-6 
 
 
 30 
 
 22 33.2 
 
 14 44.97 
 
 O.IO 
 
 o.oo 
 
 48.1 
 
 
 31 
 
 22 37.9 
 
 14 49-91 
 
 O.IO 
 
 o.oo 
 
 47-9 
 
 
 32 
 
 22 16.6 
 
 - M 28.39 
 
 1.90 
 
 0.00 
 
 46.3 
 
 
 33 
 
 17 47.6 
 
 - 9 58.35 
 
 2.OO 
 
 o.oo 
 
 47-2 
 
 
 34 
 
 17 35-2 
 
 - 9 47-47 
 
 2.OO 
 
 o.oo 
 
 45-7 
 
 
 36 
 
 3 57-8 
 
 + 3 52.79 
 
 2. 2O 
 
 o.oo 
 
 48.4 
 
 
 37 
 
 10 10.2 
 
 2 2O.79 
 
 2. 2O 
 
 o.oo 
 
 47-2 
 
 
 38 
 
 7 2.0 
 
 + o 44.75 
 
 2.47 
 
 o.oo 
 
 44-3 
 
 
 39 
 
 14 2Q.g 
 
 - 6 39-38 
 
 1.50 
 
 o.oo 
 
 49.0 
 
 
 40 
 
 4 17-6 
 
 + 3 32.59 
 
 2.20 
 
 o.oo 
 
 48.0 
 
 
 4' 
 
 7 58.8 
 
 o 11.41 
 
 2. IO 
 
 o.oo 
 
 45-3 
 
 
 42 
 
 5 6.0 
 
 + 2 42.55 
 
 2. IO 
 
 0.00 
 
 46.5 
 
 
 43 
 
 U 12-5 
 
 6 24.30 
 
 - i. go 
 
 o.oo 
 
 46-3 
 
 
 44 
 
 15 12.9 
 
 7 24.75 
 
 1.70 
 
 o.oo 
 
 46.4 
 
 
 45 
 
 18 30.9 
 
 10 42.89 
 
 - 1.70 
 
 o.oo 
 
 46.3 
 
 
 50 
 
 9 39- 2 
 
 o 47.96 
 
 - 3-57 
 
 o.oo 
 
 47-7 
 
 
 52 
 
 12 7.9 
 
 4 16-72 
 
 - 2.75 
 
 o.oo 
 
 48.4 
 
 
 53 
 
 15 6.0 
 
 - 7 17-45 
 
 - 1-54 
 
 o.oo 
 
 47-0 
 
 
 54 
 
 4 '3-4 
 
 + 3 35-54 
 
 - 3-57 
 
 o.oo 
 
 45-4 
 
 
 55 
 
 15 0.2 
 
 - 7 7-77 
 
 5.80 
 
 o.oo 
 
 45-6 
 
 
 56 
 
 17 8.4 
 
 - 9 '5-73 
 
 - 5-77 
 
 o.oo 
 
 46.9 
 
 
 57 
 
 13 18.0 
 
 5 28.98 
 
 - 3-30 
 
 o.oo 
 
 45-7 
 
 
 58 
 
 40 57 1 1. 8 
 
 + 10 34.96 
 
 + I. 10 
 
 o.oo 
 
 47-9 
 
 
 60 
 
 41 20 10.8 
 
 12 20.33 
 
 - 3-85 
 
 o.oo 
 
 46.6 
 
45 
 
 OBSERVATIONS FOR LATITUDE, CHEYENNE, WYOMING TERRITORY. 
 
 Recapitulation. 
 
 For October i, 1872, 26 pairs give 41 7 46.377 
 
 3, 35 " 46.277 
 
 8, 38 47-105 
 
 9, 35 46.531 
 10, 38 46.371 
 
 " n, 41 " 46.656 
 
 " 12, 44 " 46.902 
 
 Latitude, north, 41 7 46.62 
 
 Giving the first series half-weight on account of the smaller number of the observa- 
 tions and the less favorable condition of that night's work, the resulting latitude, and 
 the one adopted for this station, is, 41 7' 46". 62, with a probable error of o".o8. 
 The latitudes were originally computed by Professor William A. Rogers, of Cambridge, 
 Mass., and revised by Dr. F. Kampf. 
 
 (16.) RESULTING ASTRONOMICAL CO-ORDINATES. 
 
 Taking the longitude of the Salt Lake observatory to be 2 b 19 2 2". 74 west of 
 Washington by determination of the United States Coast Survey, and Washington 
 to be 5 h 8 m 1 2 s . 1 2 west of Greenwich according to the report of Rear- Admiral B. F. 
 Sands, Superintendent of the United States Naval Observatory, October 6, 1871, 
 Cheyenne is in longitude west from Washington, in time, i h 51 3*.3O ; in arc, 
 27 45' 49".5o; in longitude west from Greenwich, in time, 6 h 59 I5 8 42; in arc, 
 104 48' 5i".3o; in latitude, north, 41 7' 46".62o".o8. 
 
 This final result for longitude is subject, as already stated, to a correction for the 
 personal equation of the observers. It is possible, also, that the longitude of Salt 
 Lake may be changed when the observations made last October at Detroit and Ogden 
 by the United States Lake Survey and your expedition respectively are computed. 
 In such an event, of course the longitude of Cheyenne will be correspondingly affected. 
 Respectfully, yours, 
 
 JOHN H. CLARK. 
 
 Lieut. GEO. M. WHEELER, 
 
 Corps of Engineers, in charge. 
 
R E PORT 
 
 ON 
 
 ASTRONOMICAL OPERATIONS, 
 
 CONDUCTED DIJlilXO 
 
 THE FIELD-SEASON OF 1873, 
 
 THE MAIN OR PRIMARY FIELD-STATION, COLORADO SPRINGS, COLORADO TERRITORY, 
 
 AND 
 
 DEDUCTION OF RESULTS. 
 
 BV 
 
 Dr. F. KAMPF, 
 
 CIVILIAN ASTRONOMICAL ASSISTANT. 
 
U. S. ENGINEER OFFICE, GEOGRAPHICAL AND GEOLOGICAL 
 
 EXPLORATIONS AND SURVEYS WEST or IOOTH MERIDIAN, 
 
 Washington, D. C., January i, 1874. 
 
 SIR: There is presented herewith a report upon the astronomical observations 
 taken by myself, and the party under my charge, at Colorado Springs, Colorado 
 Territory, during the field-season of 1873. 
 
 GEOGRAPHICAL POSITION OF STATION. 
 
 Longitude = 104 49' 15". 10. 
 Latitude 38 49' 4i".67. 
 
 Colorado Springs is a town in El Paso County, Colorado Territory. It has been 
 built up within five years, and has nearly fifteen hundred inhabitants, and the place 
 promises to become one of considerable importance. During the summer-months the 
 hotels (of which there are quite a large number) are filled with invalids, who flock 
 here on account of the beautiful scenery and the salubrity of the climate. The track 
 of the Denver and Rio Grande Railway passes around the town at a distance from 
 the town-limits of about four thousand feet. 
 
 The astronomical point is situated between the town and the railroad, about six 
 hundred and fifty feet distant from the latter, on a slight eminence near the freight- 
 depot of the Denver and Rio Grande Railroad. The observations were conducted on 
 a pier built of bricks, which was replaced two months later by a solid sandstone 
 monument, furnished by Mr. S. G. Ward, of Pueblo. 
 
 PHYSICAL-GEOGRAPHY DETAILS. 
 
 This part of Colorado is not well watered, but the land where irrigated yields 
 almost in every instance splendid harvests. 
 
 From the astronomical point there is a clear outlook to the north, south, and east. 
 Looking west, prominent peaks and foot-hills of the Rocky Mountain range are seen 
 running north and south ; Pike's Peak, immediately west, being the highest, and Chey- 
 enne Mountain the highest in the south-southwest. At the foot of Cheyenne Mount- 
 ain there is a creek, the waters of which are brought, by means of ditches, to 
 Colorado Springs. From the station the plains rise a little to the east, at the horizon 
 say one hundred and fifty feet. In the southeast there is a hill about four hundred 
 feet high, called Washington Mountain. 
 
 Colorado Springs is laid out regularly, the streets running east and west and 
 north and south ; the greatest extension is from north to south. 
 
 Generally speaking, it is inadvisable to have the astronomical station near the 
 railroad-track; but in this case the trains ran only during the day, and the observations 
 were never affected by the vibrations of the ground. 
 7 
 
50 
 
 METEOROLOGICAL CONDITIONS. 
 
 The meteorological observations made at the station show great changes in 
 temperature during the day. I have been told by several old residents that they 
 never experienced a summer similar to that of 1873. The rainy period of the summer 
 is looked for about the ist of July, to last only a few days. This year it was noted 
 that from July 28th to August gth there was no day without rain, accompanied by 
 thunder and lightning. The prevailing winds were from the northeast or southeast, 
 commencing at 10 or 1 1 o'clock a. m., and increasing in force until 2 or 3 o'clock p. m. 
 Then clouds came up from the southwest or west, bringing much rain, thunder, and 
 lightning. It was generally clear again by 1 2 p. m.; but I found the air so very undu- 
 lating, and the stars on that account so faint, that I was sometimes obliged to suspend the 
 observations. It is probable that the temperature of the higher regions of the air was 
 affected by the vicinity of the mountains, and after a rain changed very rapidly, while 
 the lower strata remained under the same conditions. 
 
 The following table shows the general direction of the wind at 7 a. m., 2 p. m., 
 and 9 p. m., giving the mean or prevailing direction of the wind for three hours before 
 and three hours after the given time ; also the estimated force of wind for the same 
 time. The last column gives the general appearance of the sky, and needs no further 
 explanation. It shows under what particularly unfavorable circumstances the obser- 
 vations were made: 
 
 Date. 
 
 Direction of wind. 
 
 Estimated force. 
 
 Remarks. 
 
 7a.m. 
 
 2 p.m. 
 
 gp.m. 
 
 7a.m. 
 
 2 p.m. 
 
 9 p.m. 
 
 1873- 
 
 
 
 
 
 
 
 
 July 28 
 
 
 S. 
 
 NE. 
 
 
 2 
 
 i 
 
 Cloudy during the day ; clear after 12 p. m. 
 
 29 
 
 o 
 
 E. 
 
 SE. 
 
 o 
 
 2 
 
 2 
 
 Clear ; heavy dew in the night. 
 
 3 
 
 N. 
 
 SW. 
 
 NW. 
 
 I 
 
 3 
 
 2 
 
 Heavy wind and rain in the afternoon. 
 
 3' 
 
 N. 
 
 SE. 
 
 N. 
 
 I 
 
 i 
 
 I 
 
 Rain from the west at 3 p. m. 
 
 August I 
 
 N. 
 
 NE. 
 
 NW. 
 
 2 
 
 4 
 
 3 
 
 Heavy shower in the afternoon ; storm from northeast at 9 p. m. 
 
 2 
 
 o 
 
 NE. 
 
 S. 
 
 O 
 
 5 
 
 3 
 
 Heavy rain, with thunder and lightning, at 3 p. m. 
 
 3 
 
 S. 
 
 NE. 
 
 SE. 
 
 2 
 
 3 
 
 2 
 
 Cloudy all day. 
 
 4 
 
 o 
 
 SE. 
 
 N. 
 
 
 
 3 
 
 I 
 
 Cloudy all day; rain in the afternoon. 
 
 5 
 
 o 
 
 SE. 
 
 NW. 
 
 O 
 
 2 
 
 I 
 
 Clear in the morning, cloudy in the afternoon. 
 
 6 
 
 NW. 
 
 NW. 
 
 S. 
 
 I 
 
 2 
 
 I 
 
 Cloudy all day ; rain in the afternoon. 
 
 7 
 
 o 
 
 SE. 
 
 NW. 
 
 
 
 2 
 
 I 
 
 Cloudy all day ; storming from the northwest at 12 m. 
 
 8 
 
 N. 
 
 N. 
 
 SE. 
 
 I 
 
 4 
 
 4 
 
 Cloudy all day. 
 
 9 
 
 NW. 
 
 SE. 
 
 SE. 
 
 I 
 
 2 
 
 I 
 
 Cloudy all day; rain at 9.13 p. m. 
 
 10 
 
 NE. 
 
 
 
 
 
 I 
 
 
 
 Clear. 
 
 DESCRIPTION OF OBSERVATORY AT COLORADO SPRINGS, COLORADO TERRITORY. 
 
 As soon as the monument was built, a solid framework, 8 by 10 feet, was con- 
 structed, and a large wall-tent put over it. There was an opening in the tent for the 
 meridian-line ; this was closed, when necessary, by a fly. During heavy winds the 
 
51 
 
 tent \v;is in danger of being blown away, ami it was found necessary to nail the fly 
 to the framework, while the tent itself was fastened to the stakes by strong iron wires. 
 The entrance to the tent was from the west side, and was closed by ropes. In the 
 northwest corner of the observatory a, large box was used for a table. On it the switch- 
 board and galvanic battery were placed; the chronometer being also placed there during 
 the observations. The connection from the switch-board to the Western Union Tele- 
 graph office was made by a line 600 feet in length, supported by the framework of the 
 tent and one telegraph-post 30 feet in height. A ground-wire was used after switching 
 in the \Vesiern Union office to complete the circuit. In the northeast corner of the 
 tent the chronograph was placed upon a solid and insulated framework. Wires for 
 the connection of the chronometer and breaking-key were fastened to the tent-frame. 
 The levels were also set on an insulated post in the southeast corner of the tent. For 
 chairs I used two small boxes, one on the north and the other on the south side of the 
 monument. In arranging and constructing the observing-tent 1 was assisted by C. D. 
 Gedney and Privates J. Meier and J. ( 'lancy, Battalion of Engineers. They also took 
 the meteorological observations. Mr. G. T. Ellison, at that time in charge of the 
 Western Union office, kindly assisted in sending the telegraphic signals. 
 
 DESCRIPTION OF INSTRUMENTS USED. 
 
 Observations were made by means of a, combined transit-instrument number 28, 
 made by Wiirdemann. Its focal length is three feet; radius of aperture, 2f inches; 
 diameter of pivots, i^ inches. The diagonal eye-piece used had a magnifying-power of 
 40 diameters. This instrument was provided with two finding-circles, 3^ inches in 
 diameter, graduated to every twenty minutes, and reading to single minutes by means 
 of the vernier. Another circle was affixed to the upper part of the tube, divided also 
 also to twenty minutes, and having in the center a level used in latitude-observations 
 for determining the change in the inclination of the horizontal revolving-base. Seven 
 wires were placed in the focus for time-observations, besides one horizontal wire for 
 latitude-observations. The equatorial intervals of the wires from mean of wires, 
 damp west, upper culmination, were: 
 
 I. 
 
 II. 
 
 III. 
 
 IV. 
 
 V. 
 
 VI. 
 
 VII. 
 
 s. 
 
 s. 
 
 s. 
 
 s. 
 
 s. 
 
 s. 
 
 s. 
 
 + 16.86 
 
 + 12.75 
 
 + 4-59 
 
 + 0.17 
 
 4.24 
 
 - 12.77 
 
 - 17-35 
 
 One revolution of the micrometer-screw moved the horizon tal-wire 6 2 ".12; the 
 the value of one division of the striding-level, which was used at every station, was 
 o".75; the value of one division of the zenith-telescope level was i".io. The chrono- 
 graph used was similar to that used at the United States Naval Observatory invented 
 by Professor William Harkness; the barrel being 8 inches in diameter and 24 inches 
 long, and makes one revolution a minute. The chronograph worked very well when 
 it was cleaned before commencing operations at a new station. It had but a single 
 pen, which recorded clock-signals and those made by the observer. 
 
52 
 
 For time-observations and exchange, sidereal chronometer No. 1491, Negus, 
 always used. The galvanic connections were made by means of a switch-board, the 
 connections of which are given in the following diagram: 
 
 Owonoqraph, 
 
 JSreaJc Circuit 
 
 SWITCH i. Closed when receiving from connected station ; Nos. 2 and 3 open. 
 SWITCH 2. Closed when sending to connected station ; Nos. i and 3 open. 
 SWITCH 3. Local ; throws sounder into local circuit. 
 
53 
 
 POINTS WITH WHICH CONNECTIONS WERE MADE, &c. 
 
 Connection was made with Salt Lake City on the nights of July 2gth and joth, 
 and August 2d, 5th, and 6th. Observations for time were made at Colorado Springs 
 on the nights of July 28th, 29th, 3oth, and 3ist, and August 2d, 4th, 5th, and 6th; 
 at Salt Lake on the nights of July 28th, 29th, 3oth, and 3ist, and August ist, 2d, 
 5th, and 6th. 
 
 The reductions of time-observations for Colorado Springs were made in the field 
 by the astronomer, and also those made at Salt Lake after returning from the field. 
 He also made a new reading of the signals sent and received from both stations. 
 
 The telegraph-line between Colorado Springs and Salt Lake is 763 miles long, 
 and divided into four circuits. The signals are transmitted from one circuit to another 
 by means of automatic repeaters : one placed at Denver, Colorado Territory; one at 
 Cheyenne, Wyoming Territory; and one at Corinne, Utah: the length of the line 
 being from Colorado Springs to Denver, 75 miles; from Denver to Cheyenne, 106 
 miles; from Cheyenne to Corinne, 537 miles; and from Corinne to Salt Lake, 45 miles; 
 using at every station sixty-five Grove cells. 
 
 The use of the wires was always freely tendered by the Western Union Tele- 
 graph Company, although in many cases they were needed at the same time for the 
 transaction of the regular business of the company. 
 
 It sometimes occurs when two lines of wires are fixed to the same poles that, 
 during heavy storms, the wires are brought in contact by oscillation, which was over- 
 come in this case by connecting the two wires at an intermediate station, Denver, 
 Colorado, upon the suggestion of Mr. Woodward, the superintendent at that point. 
 
54 
 
 Tabulation, of Stars used for Determination of Time at Colorado Springs, Colorado, and 
 
 Salt Lake City, Utah. 
 
 
 Colorado Springs. 
 
 S-.Ut Lake City. 
 
 Name of star. 
 
 Mean 
 Sight Ascension, 
 1873.0. 
 
 Declination. 
 
 July- 
 
 August 
 
 July 
 
 August 
 
 28 
 
 29 
 
 30 
 
 31 
 
 2 
 
 4 
 
 5 
 
 6 
 
 28 
 
 29 
 
 30 
 
 31 
 
 I 
 
 2 
 
 5 
 
 6 
 
 f Ursae Minoris . . . 
 
 h. m. s. 
 15 48 38.49 
 52 19-90 
 58 3-26 
 16 5 58.86 
 7 4I-48 
 15 55-32 
 
 22 16.58 
 28 14.52 
 30 10.03 
 38 32-55 
 43 '5-97 
 51 39-41 
 56 54.91 
 59 3.66 
 17 8 51.41 
 18 36.92 
 22 45.42 
 27 33.78 
 29 2.35 
 
 37 41-83 
 41 29.32 
 18 i 19.72 
 6 10.10 
 14 44.25 
 
 21 57-51 
 
 28 17.70 
 32 38.31 
 40 23.95 
 40 25.83 
 45 23.45 
 47 23.39 
 50 27.42 
 59 34-30 
 19 2 12.61 
 :o 12. 18 
 12 31.21 
 '7 58-93 
 19 5-63 
 23 25.35 
 27 52-95 
 30 3.46 
 33 2.08 
 40 13-29 
 44 35-17 
 48 35-44 
 57 56-I3 
 20 13 7.43 
 20 2.98 
 
 27 8.69 
 30 32.31 
 57 6.15 
 45 48-10 
 2t I 12.36 
 7 31-88 
 15 32.83 
 
 4- 78 II.O 
 4- 27 14.8 
 19 27-3 
 4- 68 . 8.7 
 - 3 21.9 
 + 46 37.0 
 4- 61 48.1 
 4- 69 2.6 
 10 18.4 
 
 4- 39 9-9 
 + 42 28.0 
 4- 9 34-5 
 4-33 45-2 
 + 82 14.5 
 + 14 32.2 
 - 24 3-3 
 4- 74 57-0 
 + 52 23.8 
 4 12 39.3 
 + 68 49.0 
 4- 27 47-8 
 4- 9 33-0 
 - 21 5.4 
 - 2 55-8 
 
 - M 39-0 
 8 19.8 
 4- 38 40.0 
 + 37 28.0 
 + 37 28.0 
 + 33 13-0 
 26 27.1 
 
 + 75 17-0 
 4- 13 40.6 
 - 21 14.0 
 - 19 10.5 
 + 67 26.3 
 4 73 7-1 
 + 2 51.8 
 4 24 23.0 
 4- 7 5-0 
 7 18.4 
 4- 49 56.0 
 4- 10 18.3 
 4- 8 32.: 
 4-69 56.6 
 + 6 55.3 
 4- 77 19-7 
 - 18 37.6 
 + 10 52.4 
 4-72 6.1 
 4- 44 49-6 
 - 9 27.5 
 +38 7.6 
 4- 29 42.4 
 4-62 2.9 
 
 
 
 * 
 * 
 
 * 
 
 A 
 
 * 
 * 
 
 * 
 * 
 # 
 * 
 
 # 
 # 
 
 * 
 
 # 
 
 X- 
 
 * 
 
 * 
 * 
 
 * 
 * 
 * 
 # 
 
 * 
 
 * 
 * 
 * 
 * 
 * 
 * 
 
 * 
 
 
 * 
 * 
 
 * 
 
 * 
 
 * 
 * 
 
 * 
 
 * 
 * 
 
 * 
 * 
 # 
 
 * 
 * 
 
 * 
 * 
 * 
 
 * 
 
 * 
 
 
 * 
 
 * 
 * 
 
 * 
 
 
 * 
 * 
 * 
 
 
 * 
 
 * 
 
 # 
 * 
 
 fl 
 * 
 
 
 
 
 
 * 
 
 * 
 * 
 
 * 
 * 
 
 /3 1 Scorpii . 
 
 Groombridge 2320 . 
 
 
 
 A Draconis ..... 
 
 f Ophiuchi 
 
 * 
 
 
 * 
 
 # 
 
 
 * 
 * 
 
 * 
 * 
 
 * 
 * 
 
 
 # 
 * 
 
 Groombridge 2376 . 
 
 d Herculis 
 c Ursae Minoris 
 
 * 
 
 
 * 
 
 
 * 
 
 
 
 
 
 
 
 * 
 * 
 * 
 
 # 
 * 
 
 * 
 # 
 
 * 
 * 
 # 
 
 # 
 * 
 * 
 
 1 '' Herculis 
 
 # 
 
 * 
 * 
 # 
 
 * 
 
 * 
 * 
 
 * 
 
 
 * 
 
 
 * 
 
 M 
 
 * 
 * 
 
 * 
 
 * 
 * 
 
 * 
 
 * 
 * 
 * 
 
 
 * 
 
 -s 
 * 
 
 
 
 * 
 
 
 * 
 
 * 
 * 
 
 # 
 * 
 * 
 
 
 
 * 
 
 * 
 # 
 
 
 
 
 * 
 * 
 
 * 
 
 # 
 * 
 * 
 
 * 
 
 * 
 * 
 * 
 
 * 
 * 
 
 * 
 * 
 
 :: 
 
 # 
 # 
 * 
 * 
 
 Groombridge 966, L. C. 
 
 
 
 
 
 
 
 
 
 
 C l Lvrae . 
 
 3 Lvrze 
 
 
 
 
 
 
 
 
 
 
 a Vulpeculae .... 
 fi Aquilae 
 
 
 
 
 
 
 
 T Capricorni .... 
 
 Groombridge 3241 . 
 
 
 
 ' Cvani . 
 
 
 
55 
 
 COLORADO SPRINGS, COLORADO TERRITORY, July 28, 1873. 
 
 Name of Star. 
 
 Clamp. 
 
 T. 
 
 m 
 
 rtA 
 
 <:C 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 m. s. 
 
 K Ophiuchi 
 
 W. 
 
 17 I 50.23 
 
 0.05 
 
 + o-54 
 
 + 0.60 
 
 17 I 51.32 
 
 16 51 41.23 
 
 10 10. eg 
 
 Ursae Minoris . 
 
 
 9 20.45 
 
 - 0.48 
 
 - 5-69 
 
 -1- 4-37 
 
 9 18.65 
 
 59 8.70 
 
 9-95 
 
 a' Herculis. 
 
 
 19 2.47 
 
 - o.n .+ 0.47 
 
 + 0.61 
 
 19 3-44 
 
 17 8 53.30 
 
 10.14 
 
 /} Draconis 
 
 
 37 45-68 
 
 O.II 
 
 - 0.42 
 
 + 0.97 
 
 37 46.12 
 
 27 35.92 
 
 IO.2O 
 
 ft Herculis. 
 
 E. 
 
 51 41.99 
 
 0.04 
 
 + 0.24 
 
 0.67 
 
 51 41.52 
 
 41 31.30 
 
 10.22 
 
 
 IO IO. I2O 
 
 
 
 Normal Equations, 
 
 o = 0.42 + 5.00 fit 4.36(1 q.g&c 
 
 = 7.12 4. 36* +26.72 a + 37.79 c a = + IMI5 
 
 o = 6.06 9.98 tit + 37.790 + 6i.ooc c = o'.sgo 
 
 COLORADO SPRINGS, COLORADO TERRITORY, July 29, 1873. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 IB 
 
 A 
 
 rC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 m. s. 
 
 I Aqirilse . 
 
 W. 
 
 18 38 31.00 
 
 + O.OI 
 
 + 0.87 
 
 - 0.04 
 
 18 38 -31.84 
 
 18 28 20.00 
 
 10 11.84 
 
 <z Lyra .... 
 
 
 42 52.09 
 
 0.03 
 
 o.oo 
 
 0.05 
 
 42 52.01 
 
 32 40.48 
 
 ii 53 
 
 /3 Lyrae .... 
 
 
 
 55 37-27 
 
 0.05 
 
 + 0. 12 
 
 0.04 
 
 55 37.30 
 
 45 25.61 
 
 11.69 
 
 a Sagittarii 
 
 
 
 57 36.68 
 
 0.02 
 
 + 1.18 
 
 - 0.04 
 
 57 37- ; 8o 
 
 47 26.06 
 
 11.74 
 
 50 Draconis 
 
 . 
 
 19 o 46.14 
 
 o. 19 
 
 -2.74 
 
 0.14 
 
 19 o 43.07 
 
 50 31.28 
 
 11.79 
 
 f Aquilae . 
 
 E. 
 
 9 47.83 
 
 O.I2 
 
 + 0.51 
 
 + 0.04 
 
 9 48.26 
 
 59 36.49 
 
 11.77 
 
 rf Draconis 
 
 
 22 47.70 
 
 0.32 
 
 - 1.46 
 
 + 0.09 
 
 22 46.01 
 
 19 12 34.24 
 
 11.77 
 
 T Draconis . . 
 
 
 
 28 16.86 
 
 - 0.51 
 
 - 2.27 
 
 + O. 12 
 
 28 14.20 
 
 18 2.52 
 
 11.68 
 
 K Aquilae . 
 
 . 
 
 40 16.97 
 
 0.13 
 
 + 0.84 
 
 -t- 0.04 
 
 40 17.72 
 
 30 5.88 
 
 11.84 
 
 y Aquilse . 
 
 
 50 26.80 
 
 0.16 
 
 + 0.57 
 
 4- 0.04 
 
 50 27.25 
 
 40 15.56 
 
 11.69 
 
 Mean, excluding a Lvrse, for 19'' 4 local sidereal time .... 
 
 IO II.76iO fl .OI4 
 
 
 
 Normal Equations. 
 
 o=+ 2.70+ lo.ood/ 2.030 + 0.571: 
 
 o= 15.73 2.03<W + I3.33<z i.03<r <z = +i B .i7o 
 
 = 0.31+ 0.57*- 1.030 + 42.74^ <-=+o".036 
 
56 
 
 COLORADO SPRINGS, COLORADO TERRITORY, July 30, 1873. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 <5B 
 
 flA 
 
 ^C 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 m. s. 
 
 r Draconis . 
 
 E. 
 
 19 28 14.82 
 
 o.oo 
 
 4- 0.41 
 
 0.14 
 
 19 28 15.09 
 
 19 18 2.48 
 
 IO 12. 6l 
 
 K Aquilae . 
 
 
 40 18.63 
 
 o.or 
 
 - 0.15 
 
 0.04 
 
 40 18.43 
 
 30 5 . 88 
 
 12.55 
 
 y Aquilae . 
 
 . 
 
 50 28.19 
 
 0.03 
 
 O.IO 
 
 0.04 
 
 50 28.02 
 
 40 15.56 
 
 12.46 
 
 a Aquilae . 
 
 
 54 50.05 
 
 O.O2 
 
 O.II 
 
 0.04 
 
 54 4Q.?8 
 
 44 37.48 
 
 12.40 
 
 T Aquilse . 
 
 W. 
 
 20 8 10.93 
 
 4- 0.09 
 
 0.12 
 
 4- 0.04 
 
 20 8 10.94 
 
 57 58.44 
 
 12.50 
 
 K Cephei . . 
 
 
 23 23.07 
 
 + 0.50 
 
 4- O.6o 
 
 4- 0.18 
 
 23 24.35 
 
 20 13 11.85 
 
 12.50 
 
 T Capricorn! . 
 
 . 
 
 30 18.38 
 
 4- 0.09 
 
 0.19 
 
 4- 0.04 
 
 30 18.32 
 
 20 5.63 
 
 12.69 
 
 E Delphini . 
 
 . 
 
 37 23-53 
 
 + 0.14 
 
 O.IO 
 
 4- 0.04 
 
 37 23.61 
 
 27 10.98 
 
 12.63 
 
 Groom. 3241 . 
 
 
 
 40 47.38 
 
 -1- 0.44 
 
 4- 0.38 
 
 4- 0.13 
 
 40 48.33 
 
 30 35.80 
 
 12.53 
 
 
 IO 1 2 . 540 O".O2O 
 
 
 
 Normal Equations. 
 
 o= 1.32 4- g.oorf/ 2.g3 4.39^ 
 
 0= +4.34 2.93d<+ 17. 33 a + II. 831: a = o".2i3 
 
 o= +4.77 4.39 it+ II. 83 a + 49. 51 IT c = o".040 
 
 COLORADO SPRINGS, COLORADO TERRITORY, July 31, 1873. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 IB 
 
 A 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 m. s. 
 
 ? Ursas Minoris . 
 
 W. 
 
 15 59 1.30 
 
 - 0.83 
 
 6.50 
 
 + 0.31 
 
 15 58 54.28 
 
 15 48 40.97 
 
 10 13.31 
 
 c Coronas . 
 
 . 
 
 16 2 34.39 
 
 0.24 
 
 + 0.48 
 
 4- 0.07 
 
 16 2 34.70 
 
 52 21.55 
 
 13.15 
 
 /5 l Scorpii . 
 
 
 8 16.76 
 
 O.I2 
 
 + 1-93 
 
 4- 0.07 
 
 8 18.64 
 
 58 4-95 
 
 13.69 
 
 Groom. 2320 
 
 . 
 
 16 17.56 
 
 - 0.51 
 
 - 2.74 
 
 4- 0.17 
 
 16 14.48 
 
 16 6 0.86 
 
 13.62 
 
 <5 Ophiuchi 
 
 . 
 
 17 55-21 
 
 0.16 
 
 4- 1.40 
 
 4- 0.06 
 
 17 56.51 
 
 7 43-12 
 
 13-39 
 
 r Herculis. 
 
 . 
 
 26 11.26 
 
 - 0.31 
 
 0.42 
 
 4- o.og 
 
 26 10.62 
 
 15 57.00 
 
 13.62 
 
 A Draconis 
 
 E. 
 
 38 33-69 
 
 - 0.51 
 
 - 2-95 
 
 0.18 
 
 38 30.05 
 
 28 16.74 
 
 13.31 
 
 e Ursae Minoris . 
 
 
 17 9 33-8i 
 
 1.02 
 
 10.67 
 
 0.47 
 
 17 9 21.65 
 
 59 8-25 
 
 13.40 
 
 a 1 Herculis. 
 
 . 
 
 19 6.30 
 
 O.29 
 
 4- 0.83 
 
 0.07 
 
 19 6.82 
 
 17 8 53.27 
 
 13-55 
 
 44 Ophiuchi 
 
 . 
 
 28 51.09 
 
 o. 14 
 
 4- 2.05 
 
 0.07 
 
 28 52.93 
 
 18 39.14 
 
 13-79 
 
 /? Draconis 
 
 . 
 
 37 50.74 
 
 - 0.45 
 
 - 0.80 
 
 O.IO 
 
 37 49-39 
 
 27 35-86 
 
 13-53 
 
 a Ophiuchi 
 
 
 
 39 17.32 
 
 0.23 
 
 + 0.94 
 
 0.06 
 
 39 17.97 
 
 29 4.30 
 
 13-67 
 
 
 IO !3-53o s .03 
 
 
 
 Normal Equations. 
 
 o = 0.23 + I2.oo6t 7.820'+ 2.79<r 
 
 o= 3.15 7. 82 6t + 42.100' 23.31*- ' = 4- o'.ogs 
 
 = 4-8.664- 2.79<5/ 23.310' -t- 105.31 c c = o'.o63 
 
 Adopted azimuth, 4- 2'.eo ; azimuth of the instrument, -r2'.og5. 
 
57 
 
 COLORADO SPRINGS, COLORADO TERRITORY, July 31, 1873. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 SB 
 
 sA 
 
 <rC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 m. s. 
 
 a Sagittarii . 
 
 E. 
 
 18 57 37.84 
 
 o.n 
 
 + 1.96 
 
 0.07 
 
 18 57 39.62 
 
 18 47 26.06 
 
 10 13.56 
 
 f Aquilae . 
 
 . 
 
 19 9 49-73 
 
 O.2O 
 
 + 0.86 
 
 0.07 
 
 19 9 50.32 
 
 59 36-48 
 
 13.84 
 
 (/ Sagittarii . 
 
 
 20 27.04 
 
 O.I2 
 
 + 1-75 
 
 0.07 
 
 20 28.60 
 
 19 10 14.75 
 
 13-85 
 
 <! Draconis . 
 
 . 
 
 22 50.87 
 
 0.48 
 
 - 2.43 
 
 - 0.17 
 
 22 47-79 
 
 12 34.19 
 
 13.60 
 
 r Draconis . 
 
 W. 
 
 28 2O.22 
 
 - 0.46 
 
 - 3-79 
 
 + O.22 
 
 28 16.19 
 
 18 2.45 
 
 13-74 
 
 y Aquilae 
 
 
 5O 28.22 
 
 o.og 
 
 + 0.95 
 
 + 0.07 
 
 50 29.15 
 
 40 15.56 
 
 13-59 
 
 a Aquilae 
 
 . 
 
 54 50.10 
 
 0.05 
 
 + 0.99 
 
 + O.O6 
 
 54 51.10 
 
 44 37-48 
 
 13.62 
 
 e Draconis . 
 
 
 58 55.16 
 
 0.10 
 
 - 2.94 
 
 + 0.19 
 
 58 52.31 
 
 48 38-7 
 
 13.61 
 
 
 10 i3.66o".O2 
 
 
 
 Normal Equations. 
 
 o = 0.54 + S.ooSt i.36' 2.571: 
 
 o= + 1. 2O 1.36*+ 10.160' 4- g.39<r a' = O 8 .O54 
 
 = 4-2.702.57*+ 9.39^' + 32.75<r <r = o".o64 
 
 Adopted azimuth, +2 8 .oo; azimuth of the instrument, +I s .g46. 
 
 COLORADO SPRINGS, COLORADO TERRITORY, August 2, 1873. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 f>B 
 
 A 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m, s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 m. s. 
 
 c Coronas . 
 
 E. 
 
 16 2 36.71 
 
 + O.O2 
 
 + 0.25 
 
 + 0.08 
 
 16 2 37.O6 
 
 15 52 21.37 
 
 10 15.69 
 
 /?' Scorpii . . 
 
 . 
 
 8 19.57 
 
 + O.OI 
 
 + 0.99 
 
 + 0.07 
 
 8 20.64 
 
 58 4.92 
 
 15.72 
 
 6 Ophiuchi . . 
 
 . 
 
 17 57-94 
 
 O.OO 
 
 + 0.72 
 
 + 0.07 
 
 17 58.73 
 
 16 7 43.10 
 
 15-63 
 
 T Herculis . 
 
 
 26 12.94 
 
 + 0.04 
 
 0.22 
 
 + O.IO 
 
 26 12.86 
 
 15 56.96 
 
 15.90 
 
 T] Draconis . 
 
 
 32 34-83 
 
 O.OI 
 
 O.8g 
 
 + 0.14 
 
 32 34.07 
 
 22 18.43 
 
 15-64 
 
 A Draconis . 
 
 . 
 
 38 .33-66 
 
 + 0.12 
 
 - 1-52 
 
 + 0.19 
 
 38 32-45 
 
 28 16.63 
 
 15.82 
 
 >1 Herculis . 
 
 W. 
 
 48 49-93 
 
 + O.Og 
 
 O.OI 
 
 0.08 
 
 48 49.93 
 
 38 34-26 
 
 15-67 
 
 K Ophiuchi . 
 
 
 17 i 56-35 
 
 + 0.04 
 
 + 0.54 
 
 0.07 
 
 17 I 56.86 
 
 51 41.18 
 
 15-68 
 
 E Ursse Minoris 
 
 
 9 2 9.37 
 
 + 0.27 
 
 - 5-47 
 
 0.50 
 
 9 23-67 
 
 59 7-93 
 
 15-74 
 
 a 1 Herculis . 
 
 . 
 
 19 8.68 
 
 + 0.05 
 
 + o-45 
 
 0.07 
 
 19 9. II 
 
 17 8 53.25 
 
 15.86 
 
 44 Ophiuchi . 
 
 
 28 53-97 
 
 + 0.03 
 
 + 1.05 
 
 0.07 
 
 28 54.98 
 
 18 39.13 
 
 15-85 
 
 Mean for i6 h 35"* local sidereal time . 
 
 10 15 . 745 o fl ,o2o 
 
 
 
 Normal Equations. 
 
 O = +O.Q3 + Il.OOf!/ 3.82' 2.2&C 
 
 o= 4.66 3.82<!/+3i.37' + 31.64^ a' = 4-o'.o75 
 
 o= 7.72 2.2d6t+ 31.640' + 77-74<r c = +o".o67 
 
 Adopted azimuth, + i.oo; azimuth of the instrument, +i".O75. 
 
COLORADO SPRINGS, COLORADO ^TERRITORY, August 4, 1873. 
 
 Name of Star. 
 
 Clamp 
 
 T. 
 
 <5B 
 
 aA 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 m. s. 
 
 d Sagittarii . 
 
 E. 
 
 19 20 31.64 
 
 0.04 
 
 -t- 1.27 
 
 0.04 
 
 19 20 32.83 
 
 19 10 14.76 
 
 10 18.07 
 
 <5 Draconis . 
 
 . 
 
 22 54.29 
 
 0.23 
 
 - 1-77 
 
 0.09 
 
 22 52.20 
 
 12 34.10 
 
 18.10 
 
 r Draconis . 
 
 
 28 23.53 
 
 - 0.34 
 
 - 2.73 
 
 O.I2 
 
 28 20.34 
 
 28 2.33 
 
 18.01 
 
 y Aquilae . 
 
 W. 
 
 50 32-95 
 
 0.04 
 
 + 0.69 
 
 + 0.04 
 
 50 33-64 
 
 40 15.57 
 
 18.07 
 
 a Aquilae . . 
 
 . 
 
 54 54-92 
 
 O.O2 
 
 + 0.72 
 
 + 0.03 
 
 54 55.65 
 
 44 37-49 
 
 18.16 
 
 e Draconis . 
 
 
 58 58.68 
 
 O.OO 
 
 2.13 
 
 + O.IO 
 
 58 56.65 
 
 48 38.63 
 
 18.02 
 
 r Aquilae 
 
 
 
 20 8 15.76 
 
 + 0.04 
 
 + 0.76 
 
 + 0.04 
 
 20 8 16.60 
 
 57 58.46 
 
 18.14 
 
 Mean for ig 11 44 local sidereal time 
 
 10 18,081 io^oi* 
 
 
 
 r 
 
 Normal Equations. 
 
 o= +0.16 + 7. ocxtt 2. 260' + i.isc 
 
 o= 0.93 2. 26(W+ 7.200' 6.i6c <z' = + oMio 
 
 = + 1.58 + 1.15 it 6.16 ' + 31.46 c c= o".034 
 
 Adopted azimuth, + i'.3O ; azimuth of the instrument, + i".4io. 
 
 COLORADO SPRINGS, COLORADO TERRITORY, August 5, 1873. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 tB 
 
 oA 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 9. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 m. s. 
 
 /3 1 Scorpii . . 
 
 E. 
 
 16 8 23.72 
 
 + O.O2 
 
 - 0.53 
 
 + 0.03 
 
 16 8 23.24 
 
 15 58 4-89 
 
 10 18.35 
 
 6 Ophiuchi . . 
 
 . 
 
 18 1.56 
 
 + O.O2 
 
 - 0.39 
 
 + 0.03 
 
 18 1.22 
 
 16 7 43.07 
 
 18.15 
 
 T Herculis . 
 
 . 
 
 26 15.02 
 
 + 0.03 
 
 + O.I2 
 
 + 0.05 
 
 26 15.22 
 
 15 56.90 
 
 18.32 
 
 A Draconis . 
 
 . 
 
 38 33-74 
 
 0.03 
 
 + 0.82 
 
 + 0.09 
 
 38 34-62 
 
 28 16.47 
 
 18.15 
 
 f Ophiuchi . . 
 
 . 
 
 40 30.40 
 
 O.OI 
 
 - 0.45 
 
 + 0.03 
 
 40 29.97 
 
 30 11.78 
 
 18.19 
 
 i) Herculis . 
 
 W. 
 
 48 52.39 
 
 -1- O.Og 
 
 + O.OI 
 
 0.04 
 
 48 52.45 
 
 38 34.21 
 
 4 18.24 
 
 K Ophiuchi . 
 
 . 
 
 17 i 59-6i 
 
 + O.O6 
 
 0.29 
 
 0.03 
 
 17 I 59-35 
 
 Si 4i-i5 
 
 18.20 
 
 e Ursae Minoris 
 
 
 9 22.66 
 
 -H 0.32 
 
 + 2.96 
 
 0.23 
 
 9 25-71 
 
 59 7-48 
 
 18.23 
 
 a 1 Herculis . . 
 
 
 
 19 11.54 
 
 -1- 0.07 
 
 0.24 
 
 0.03 
 
 19 11.34 
 
 17 8 53.22 
 
 18.12 
 
 
 IO l8.22OO".OI7 
 
 
 
 Normal Equations. 
 
 o = 0.02 + g.ooctt 3.430' s.sgr 
 
 o = + 1.32 3.43 tt+ 30.260' + 35.00.: a' = o.o8l 
 
 o = +0.57 3.39 <tt+ 35.000' + 71.85 c f= +o B .03l 
 
 Adopted azimuth, o'.jo; azimuth of the instrument, o'.sSi. 
 
59 
 
 COLORADO SPRINGS, COLORADO TERRITORY, August 6, 1873. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 * 
 
 aA 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 m. s. 
 
 y A(|iii!:c . . 
 
 E. 
 
 19 50 35.06 
 
 0.03 
 
 0.08 
 
 4- 0.07 
 
 19 50 35.02 
 
 19 40 15.57 
 
 -io 19.45 
 
 a Aquilae . 
 
 . 
 
 54 56.72 
 
 O.O2 
 
 o.oS 
 
 + 0.07 
 
 54 56.69 
 
 44 37-49 
 
 19.20 
 
 K Cephei 
 
 W. 
 
 20 23 30.70 
 
 + O.II 
 
 4- 0.45 
 
 0.30 
 
 20 23 30.96 
 
 13 11.66 
 
 19.30 
 
 e Delphini . . 
 
 
 37 30.42 
 
 + O.O2 
 
 0.08 
 
 0.07 
 
 37 30.29 
 
 27 n. 01 
 
 19.28 
 
 Groom. 3241 . 
 
 . 
 
 40 54.84 
 
 + O.II 
 
 + 0.28 
 
 O.2I 
 
 40 55-02 
 
 30 35.72 
 
 19.30 
 
 a Cygni .. , . 
 
 
 47 27.87 
 
 4- 0.04 
 
 + 0.02 
 
 O.Og 
 
 47 27:84 
 
 37 8.49 
 
 19-35 
 
 H Aquarii . 
 
 
 56 10.27 
 
 0.06 
 
 0.12 
 
 0.07 
 
 56 IO.O2 
 
 45 50.65 
 
 19.37 
 
 61 Cygni . 
 
 E. 
 
 21 ii 33.94 
 
 + O.02 
 
 O.OO 
 
 4- 0.08 
 
 21 II 34.04 
 
 21 I 14.86 
 
 19.18 
 
 C Cygni. . . 
 
 
 17 53-39 
 
 + 0.03 
 
 0.03 
 
 4- 0.07 
 
 17 53.46 
 
 7 34-14 
 
 19.32 
 
 a Cephei. . . 
 
 
 25 54.58 
 
 + 0.07 
 
 4- 0.13 
 
 4- 0.14 
 
 25 54.92 
 
 15 35-56 
 
 19.36 
 
 Mean for zo h 28 local sidereal tii 
 
 
 -10 I 9 . 3 i 1 c,.oi 7 
 
 
 Normal Equations. 
 
 o= 2.07 + lo.ood/ 3.183 4.67* 
 0=4-1.57 3. i8<i/+ 13.313 + 17.08*- 
 o = + o.59 4-67 it + 17.083 + 44. g6c 
 
 < = -o-.i59 
 = + o".o67 
 
 SALT LAKE CITY, UTAH TERRITORY, July 28, 1873. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 ,B 
 
 3A 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 i Ophiuchi . 
 
 W. 
 
 8 o 38.60 
 
 0.04 
 
 - 1.13 
 
 0.06 
 
 8 o 37.37 
 
 16 7 43.15 
 
 + 8 7 5.78 
 
 r Herculis . 
 
 
 8 51.22 
 
 0.07 
 
 4- 0.24 
 
 0.09 
 
 8 51.30 
 
 15 57-07 
 
 5-77 
 
 T] Draconis . 
 
 . 
 
 15 11.68 
 
 O.IO 
 
 4- 1.23 
 
 - 0.13 
 
 15 12.68 
 
 22 18.62 
 
 5-94 
 
 f Ophiuchi . 
 
 . 
 
 23 7-53 
 
 0.03 
 
 - 1.28 
 
 0.07 
 
 23 6.15 
 
 30 11.98 
 
 5.83 
 
 17 Herculis . 
 
 . 
 
 31 28.72 
 
 0.06 
 
 0.06 
 
 0.08 
 
 31 28.52 
 
 38 34.70 
 
 6.18 
 
 Groom. 2376 . 
 
 E. 
 
 36 11.71 
 
 0.07 
 
 0.06 
 
 + 0.09 
 
 36 11.67 
 
 43 17-80 
 
 6.13 
 
 K Ophiuchi . 
 
 
 44 36.08 
 
 0.04 
 
 0.84 
 
 + 0.06 
 
 44 35-26 
 
 5 1 4L23 
 
 5-97 
 
 d Herculis . 
 
 . 
 
 49 51-00 
 
 0.05 
 
 0.24 
 
 + 0.08 
 
 49 50.79 
 
 56 56.75 
 
 5.96 
 
 a 1 Herculis . 
 
 . 
 
 9 i 48.06 
 
 0.04 
 
 - 0.75 
 
 + 0.06 
 
 9 i 47-33 
 
 17 8 53.30 
 
 5-97 
 
 Groom. 966 . 
 
 
 
 '5 44-37 
 
 0.07 
 
 5.62 
 
 0.25 
 
 15 38.43 
 
 22 44.46 
 
 6.03 
 
 Mean for I7 h o m local sidereal tim 
 
 
 4-87 5.956o.oi2 
 
 
 Normal Equations. 
 
 O=+ O.I5 + ll.OOit+ 6.O83 5.I2<T tit = i 
 
 o= 19.16+ 6.o8<i/+ 14.920 ii.o2c 3 = + i'.6i9 
 
 o= + is.o6 5.i2ctt ii. 023 + 31. 57<- c = o'.o64 
 
 These equations were used when v Serpentiswas observed ; the observation is excluded for the final 
 result on account of the doubtful position of the star. 
 
60 
 
 SALT LAKE CITY, UTAH TERRITORY, July 29, 1873. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 tB 
 
 A 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m, s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 C Aquilae 
 
 W. 
 
 10 52 32.11 
 
 0.07 
 
 0.62 
 
 0.26 
 
 10 52 31.16 
 
 18 59 36.49 
 
 +87 5.33 
 
 d Sagittarii . 
 
 . 
 
 ii 3 10.94 
 
 0.04 
 
 - 1.42 
 
 0.27 
 
 ii 3 9.21 
 
 10 14.75 
 
 5-54 
 
 K Aquilas . . 
 
 . 
 
 23 1.82 
 
 0.05 
 
 - US 
 
 0.26 
 
 23 0.36 
 
 30 5.88 
 
 5-52 
 
 X Aquiltc 
 
 . 
 
 33 n. 16 
 
 0.06 
 
 0.80 
 
 0.26 
 
 33 10.04 
 
 40 15.56 
 
 5-52 
 
 a Aquilse 
 
 
 
 37 33-04 
 
 0.06 
 
 - 0.83 
 
 0.25 
 
 37 31-90 
 
 44 37.48 
 
 5.58 
 
 Mean for ig 11 o m local sidereal time 
 
 +8? ^.J78 
 
 
 
 Normal Equations. 
 
 o= + 1.13 + 5.00(5;+ 3. 20 a = i'.530 
 
 o= +0.94 + 3. 20 <5/-i-2. 190 e (adopted) = 4-o".255 
 
 SALT LAKE CITY, UTAH TERRITORY, July 30, 1873. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 B 
 
 oA 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 T Herculis . 
 
 E. 
 
 8 8 51.15 
 
 0.07 
 
 4- 0.27 
 
 + 0.35 
 
 8 8 51.70 
 
 16 15 57-03 
 
 +87 5.33 
 
 TI Draconis . 
 
 . 
 
 15 11.14 
 
 0.06 
 
 + 1.37 
 
 4- 0.50 
 
 15 12.95 
 
 22 18.55 
 
 5.60 
 
 f Ophiuchi . . 
 
 i 
 
 23 7.63 
 
 O.O2 
 
 - 1-43 
 
 4- 0.24 
 
 23 6.42 
 
 30 11.84 
 
 5-42 
 
 17 Herculis . 
 
 . 
 
 31 28.70 
 
 O.OI 
 
 0.07 
 
 4- 0.31 
 
 31 28.93 
 
 38 34-32 
 
 5-39 
 
 Groom. 2376 . 
 
 . 
 
 37 12-03 
 
 O.OI 
 
 0.07 
 
 4- 0.32 
 
 37 12.27 
 
 43 17.78 
 
 5-51 
 
 K Ophiuchi . 
 
 W. 
 
 43 36.83 
 
 4- o.oi 
 
 - 0.94 
 
 0.24 
 
 43 35-66 
 
 51 41-21 
 
 5-55 
 
 d Herculis . . 
 
 . 
 
 49 5i.8i 
 
 4- o.oi 
 
 - 0.27 
 
 0.29 
 
 49 5I-26 
 
 56 56.73 
 
 5.47 
 
 o l Herculis . 
 
 . 
 
 9 i 48.92 
 
 o.oo 
 
 0.83 
 
 0.24 
 
 9 i 47-85 
 
 17 8 53.28 
 
 5-43 
 
 Groom. 966 . 
 
 
 15 44.09 
 
 4- 0.08 
 
 6.27 
 
 4- 0.92 
 
 15 38.82 
 
 22 44.31 
 
 5-49 
 
 
 4-87 5.466o'.oi8 
 
 
 
 Normal Equations. 
 
 o=4- 2.18 + g.oo<5/4- 4.560+ 7.86f <5/=4-o g .466 
 
 0=4- 20.03 + 4.56(5/4- 13.760 4- n.26<r a = I".8O5 
 
 0=4- 9.63 4-7.86(5/4- ii. 260 4- 29. 51* =4-o'.239 
 
61 
 
 SALT LAKE CITY, UTAH TERRITORY, July 30, 1873. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 *B 
 
 <zA 
 
 <-c 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. .m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 f Lyras . . . 
 
 W. 
 
 10 33 21.07 
 
 0.14 
 
 0.12 
 
 0.26 
 
 10 33 20.55 
 
 18 40 26.11 
 
 +87 5.56 
 
 f 2 Lyrae . 
 
 . 
 
 33 22.95 
 
 o. 14 
 
 O.I2 
 
 0.27 
 
 33 22.42 
 
 40 27.99 
 
 5-57 
 
 /? Lyrae . . . 
 
 . 
 
 38 20.74 
 
 - 0.13 
 
 0.28 
 
 0.25 
 
 38 20.08 
 
 45 25.60 
 
 5-52 
 
 50 Draconis . 
 
 . 
 
 43 23-17 
 
 0.32 
 
 + 3.89 
 
 0.83 
 
 43 25.91 
 
 50 31.23 
 
 5-32 
 
 C Aquilae 
 
 . 
 
 52 32.22 
 
 0.08 
 
 0.82 
 
 O.22 
 
 52 31.10 
 
 59 36.49 
 
 5-39 
 
 a Sagittarii . 
 
 E. 
 
 ii 3 10.79 
 
 0.03 
 
 1. 60 
 
 + 0.22 
 
 ii 3 9-38 
 
 19 10 14.75 
 
 5-37 
 
 <5 Draconis . 
 
 
 5 26.49 
 
 O.I2 
 
 + 2.04 
 
 + 0.55 
 
 5 28.96 
 
 12 34.22 
 
 5.26 
 
 T Draconis . 
 
 . 
 
 ii 53-29 
 
 0.32 
 
 + 3." 
 
 + 0.72 
 
 n 56.80 
 
 18 2.49 
 
 5-69 
 
 K Aquilae 
 
 
 
 23 1-79 
 
 O.II 
 
 - I-3I 
 
 + O.2I 
 
 23 0.58 
 
 30 5.88 
 
 5-30 
 
 
 + 87^ dd^ + O B O^ i 
 
 
 ** / j HtJ -*- v ' * W J J 
 
 Normal Equations. 
 
 o= 8.65 + 9.00* 2.8ofl 0.57^ <i<=+o".443 
 
 o = + 21.01 2.80*+ 11.39^ + 0.30^ a = i'.744 
 
 o = 8.050.57*+ o. 30^ + 41. g8f <r=+o".2lo 
 
 SALT LAKE CITY, UTAH TERRITORY, July 31, 1873. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 fB 
 
 aA. 
 
 <rC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 S. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 T Herculis . 
 
 E. 
 
 8 8 50.88 
 
 O.O2 
 
 + 0.16 
 
 + 0.56 
 
 8 8 51.58 
 
 16 15 57-03 
 
 +87 5-45 
 
 7 Draconis . . 
 
 . 
 
 15 10.90 
 
 O.02 
 
 + I.T.6 
 
 + 0.81 
 
 15 12.85 
 
 22 18.52 
 
 5.67 
 
 { Ophiuchi . 
 
 . 
 
 23 7-05 
 
 O.OI 
 
 1.20 
 
 + 0.39 
 
 23 6.23 
 
 30 11.83 
 
 5.6o 
 
 7 Herculis . 
 
 . 
 
 31.28.13 
 
 O.O3 
 
 0.06 
 
 + 0.49 
 
 3i 28.53 
 
 38 34.31 
 
 5.78 
 
 Groom. 2376 . 
 
 . 
 
 37 11.42 
 
 O.O3 
 
 0.06 
 
 + 0.52 
 
 37 11-85 
 
 43 17-76 
 
 5-91 
 
 K Ophiuchi . 
 
 W. 
 
 44 36.33 
 
 + 0.34 
 
 - 0-79 
 
 0.38 
 
 44 35-50 
 
 51 41.20 
 
 5.70 
 
 d Herculis . 
 
 
 49 5i.i8 
 
 + 0.55 
 
 0.16 
 
 0.46 
 
 49 Si-" 
 
 56 56-71 
 
 5.60 
 
 
 + 87 5.673o".O37 
 
 
 
 Normal Equations. 
 
 o = 5.69 + 7. ooi^ + o. 630 + 5.04^ <5/=+o.67 
 
 o = + 2.50 + 0.63*+ 1. 5ia 1.63.: a = i".520 
 
 o = n. 01 + 5.04* 1.630+ 13.63 c c= +o'.38l 
 
62 
 
 SALT LAKE CITY, UTAH TERRITORY, Augtist i, 1873. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 t>B 
 
 aA 
 
 cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 - 
 
 h m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 <5 Ophiuchi . 
 
 W. 
 
 8 o 38.81 
 
 + 0.06 
 
 - 1.19 
 
 0.22 
 
 8 o 37.46 
 
 16 7 43.11 
 
 +87 5.65 
 
 T Herculis . 
 
 . 
 
 8 51.32 
 
 + 0.14 
 
 + 0.26 
 
 O.32 
 
 8 51.40 
 
 15 56.98 
 
 5.58 
 
 ri Draconis . 
 
 
 15 11.63 
 
 + O.2O 
 
 + 1.30 
 
 - 0.47 
 
 15 12.66 
 
 22 18.47 
 
 5.8i 
 
 f Ophiuchi . . 
 
 . 
 
 23 7.60 
 
 + 0.07 
 
 - 1.35 
 
 0.23 
 
 23 6.09 
 
 3O 11.82 
 
 5-73 
 
 ri Herculis . 
 
 E. 
 
 31 28.39 
 
 0.03 
 
 0.07 
 
 + 0.29 
 
 31 28.58 
 
 38 34.29 
 
 5-71 
 
 Groom. 2376 . 
 
 . 
 
 36 11.82 
 
 O.O3 
 
 0.07 
 
 + 0.30 
 
 36 12. O2 
 
 43 17-74 
 
 5-72 
 
 K Ophiuchi . 
 
 
 44 36.19 
 
 O.O2 
 
 0.89 
 
 + O.22 
 
 44 35-50 
 
 51 4I.I9 
 
 5.69 
 
 d Herculis . 
 
 
 49 50.99 
 
 O.O5 
 
 0.26 
 
 + 0.27 
 
 49 50.95 
 
 56 56.70 
 
 5-75 
 
 a Herculis . 
 
 . 
 
 9 I 48.02 
 
 O.OO 
 
 0.78 
 
 + 0.23 
 
 9 I 47.47 
 
 17 8 53-26 
 
 5-79 
 
 Groom. 966 . 
 
 
 15 45-11 
 
 + 0.43 
 
 6.02 
 
 0.85 
 
 15 38.67 
 
 22 44-51 
 
 5.84 
 
 
 + 87 5.727o'.oi6 
 
 
 
 Normal Equations. 
 
 O = + 12.58 + IO.OO<M + 5.260 3-56<: it = o'.283 
 
 0=4-28.40+ 5.26<)/ + 14.25*2 11.761: a I 1 . 706 
 
 o = 27.83 3.s6(5/ 11.760 + 30. sir c = +o'.222 
 
 SALT LAKE CITY, UTAH TERRITORY, August 2, 1873. 
 
 Name of Star. 
 
 Clamp. 
 
 T. 
 
 />B 
 
 oA 
 
 . cC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m, s. 
 
 Brad. 3313 . 
 
 W. 
 
 10 14 56.60 
 
 0.07 
 
 - 1-55 
 
 0.27 
 
 10 14 54.71 
 
 18 21 59.87 
 
 +87 5.16 
 
 I Aquilae . 
 
 . 
 
 21 16.58 
 
 0.08 
 
 - 1-39 
 
 0.27 
 
 21 14.84 
 
 28 20.00 
 
 5.16 
 
 a Lyrae . 
 
 . 
 
 25 35-81 
 
 0.13 
 
 0.09 
 
 - 0.34 
 
 25 35.25 
 
 32 40.44 
 
 5-19 
 
 f l Lyrae . . . 
 
 . 
 
 33 21.40 
 
 0.08 
 
 0.13 
 
 0.32 
 
 33 20.87 
 
 40 26.08 
 
 5.21 
 
 f Lyrae . . . 
 
 . 
 
 33 23.28 
 
 0.06 
 
 0.13 
 
 0.32 
 
 33 22.77 
 
 40 27.96 
 
 5-19 
 
 Lyre . .-,.,.. 
 
 . 
 
 38 20.93 
 
 0.04 
 
 0.29 
 
 0.32 
 
 38 20.28 
 
 45 25.58 
 
 5.30 
 
 50 Draconis . 
 
 . 
 
 43 23.21 
 
 0.03 
 
 + 4-8 
 
 1.04 
 
 43 26.22 
 
 50 31.08 
 
 4.86 
 
 v Sagittarii . 
 
 E. 
 
 55 H-66 
 
 0.02 
 
 - 1-74 
 
 + 0.27 
 
 55 10.17 
 
 19 2 15.21 
 
 5-04 
 
 6 Draconis . . 
 
 . 
 
 ii 5 26.07 
 
 O.II 
 
 + 2.14 
 
 + 0.69 
 
 n 5 28.79 
 
 12 34.14 
 
 5-35 
 
 6 Aquilx 
 
 . 
 
 12 3.89 
 
 O.OI 
 
 - 1.13 
 
 + 0.26 
 
 12 3.OI 
 
 19 7.94 
 
 4-93 
 
 a Vulpeculas 
 
 . 
 
 16 22.63 
 
 O.OO 
 
 - 0.57 
 
 + 0.29 
 
 16 22.35 
 
 23 27-55 
 
 5.20 
 
 p Aquilas . 
 
 . 
 
 21 51.14 
 
 + 0.03 
 
 1.02 
 
 + 0.26 
 
 21 5O.4I 
 
 27 55-23 
 
 4.82 
 
 * Aquilae 
 
 . 
 
 23 1.96 
 
 + 0.05 
 
 - 1-37 
 
 + 0.27 
 
 23 0.91 
 
 30 5.89 
 
 4.98 
 
 6 Cygni . . . 
 
 
 
 26 58.51 
 
 + 0.15 
 
 + 0.46 
 
 + 0.41 
 
 26 59.53 
 
 33 4-44 
 
 4.91 
 
 
 + 87 5 . 093 o*.O3O 
 
 
 
 Normal Equations. 
 
 0=;+ 1.86 + 14. ooSt+ 1.500 1.63*- (J/=+o'.og3 
 
 0= +16.36+ i.5od/ + 9.98a + 6.59* a = i.828 
 
 o = + 2.03 1.63^ + 6.590 + 38.46^ c = + o.264 
 
63 
 
 SALT LAKE CITY, UTAH TERRITORY, August 5, 1873. 
 
 Name of Star. 
 
 Clamp, 
 
 T 
 
 6B 
 
 A 
 
 eC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 { Ophiuchi . 
 
 W. 
 
 8 23 9.01 
 
 0.03 
 
 - 1.30 
 
 0.28 
 
 8 23 7.40 
 
 16 30 11.79 
 
 +87 4.39 
 
 1 Herculis . 
 
 . 
 
 31 30.15 
 
 0.05 
 
 0.06 
 
 0.36 
 
 31 29.68 
 
 38 34.21 
 
 4-53 
 
 Groom. 2376 . 
 
 . 
 
 36 13.61 
 
 0.04 
 
 0.06 
 
 0.37 
 
 36 13-14 
 
 43 17-66 
 
 4.58 
 
 K Ophiuchi . 
 
 . 
 
 44 37.98 
 
 O.O2 
 
 0.85 
 
 0.28 
 
 44 36.83 
 
 51 41.15 
 
 4.32 
 
 d Herculis . 
 
 
 49 52.96 
 
 O.O2 
 
 0.25 
 
 - 0.33 
 
 49 52.36 
 
 56 56.64 
 
 4.28 
 
 o l Herculis . 
 
 E. 
 
 9 * 49-56 
 
 0.05 
 
 0.76 
 
 + 0.28 
 
 9 I 49.03 
 
 17 8 53.23 
 
 4.20 
 
 Groom. 966 . 
 
 . 
 
 15 47-o6 
 
 - 0.15 
 
 - 5.67 
 
 1. 06 
 
 15 40.18 
 
 22 44.86 
 
 4.68 
 
 a Ophiuchi . 
 
 . 
 
 23 0.44 
 
 O.II 
 
 0.79 
 
 + 0.28 
 
 22 59.82 
 
 29 4.25 
 
 4-43 
 
 a Draconis . 
 
 . 
 
 30 36.93 
 
 - 0.39 
 
 + 2.14 
 
 + 0.76 
 
 30 39.44 
 
 37 44-29 
 
 4-85 
 
 fi Herculis . 
 
 
 34 27.09 
 
 0.18 
 
 - 0.41 
 
 + 0.31 
 
 34 26.81 
 
 41 3L42 
 
 4.61 
 
 
 + 87 4.461 o*.O4i 
 
 
 
 Normal Equations. 
 
 o= + 4.45 + io.oo<5/+ 4.900 3.77* <5/=+o".46i 
 
 0=4-27.37+ 4.go<!/+ 15.143 17.34; a = l .643 
 
 = -35-79- 3-77<"-i7-34 a + 32.ox><r ' = + o'.275 
 
 SALT LAKE CITY, UTAH TERRITORY, August 5, 1873. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 PB 
 
 A 
 
 eC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 Brad. 2313 
 
 E. 
 
 10 14 56.77 
 
 O.2O 
 
 -1.28 
 
 + 0.25 
 
 10 14 55.54 
 
 IS 21 59.86 
 
 +87 4.32 
 
 a Lyrse . . . 
 
 . 
 
 25 35.62 
 
 O.32 
 
 0.08 
 
 + 0.32 
 
 25 35-54 
 
 32 40.41 
 
 4.87 
 
 {' Lyrae . . . 
 
 . 
 
 33 21.46 
 
 O.25 
 
 O.IO 
 
 + 0.31 
 
 33 21.42 
 
 4O 26.O5 
 
 4-63 
 
 C 2 Lyra . . . 
 
 . 
 
 33 23.26 
 
 O.25 
 
 O.II 
 
 + 0.31 
 
 33 23.21 
 
 40 27.93 
 
 4-71 
 
 50 Draconis . 
 
 . 
 
 43 23-26 
 
 0.78 
 
 + 3-35 
 
 + 0.97 
 
 43 26.80 
 
 50 30.93 
 
 4-13 
 
 ? Aquilx 
 
 W. 
 
 52 33-23 
 
 O.II 
 
 0.70 
 
 0.25 
 
 52 32.17 
 
 59 36.47 
 
 4-30 
 
 d Sagittarii . 
 
 . 
 
 II 3 12.05 
 
 0.05 
 
 - 1.38 
 
 0.26 
 
 il 3 10.36 
 
 19 10 14.76 
 
 4-40 
 
 S Draconis . . 
 
 . 
 
 5 28.76 
 
 0.23 
 
 + 1.76 
 
 0.64 
 
 5 29.65 
 
 12 34.07 
 
 4.42 
 
 T Draconis . 
 
 . 
 
 II 56-15 
 
 0.29 
 
 + 2.76 
 
 0.85 
 
 " 57-77 
 
 18 2.28 
 
 4-51 
 
 a Vulpeculae 
 
 . 
 
 16 23.87 
 
 O.II 
 
 0.46 
 
 0.27 
 
 16 23.03 
 
 23 27.54 
 
 4-51 
 
 /i Aquilse 
 
 . 
 
 20 52.23 
 
 0.08 
 
 0.84 
 
 0.25 
 
 20 51.06 
 
 27 55-23 
 
 4.17 
 
 K Aquilae 
 
 
 23 2.97 
 
 0.07 
 
 H3 
 
 - 0.25 
 
 23 1.52 
 
 30 5.89 
 
 4-37 
 
 B Cygni . . . 
 
 
 
 31 0.49 
 
 - 0.15 
 
 + 0.37 
 
 0.38 
 
 31 0.33 
 
 38 4.41 
 
 4.08 
 
 Mean for ig b o m local sidereal time 
 
 + 87 4.4i8o".O3c 
 
 
 
 Normal Equations. 
 
 o= 6.50+13.00^ 1.440 4.04^ (J/=+o".4i8 
 
 o = + 19.41 i. 44<?/+ 12.550 1.04* a = i".5O3 
 
 o= 11.75 4.O4<!/ i. 040 + 47. 87*: = +o'.247 
 
64 
 
 SALT LAKE CITY, UTAH TERRITORY, August 6, 1873. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 <5B 
 
 A 
 
 <rC 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 TI Draconis . 
 
 W. 
 
 8 15 12.63 
 
 + 0.14 
 
 + 1.41 
 
 0.50 
 
 8 15 13.68 
 
 16 22 18.28 
 
 +87 4.60 
 
 f Ophiuchi . 
 
 . 
 
 23 8.83 
 
 + 0.04 
 
 1.46 
 
 0.24 
 
 23 7-1? 
 
 30 11-77 
 
 4.60 
 
 TI Herculis . 
 
 . 
 
 31 30.12 
 
 + 0.06 
 
 0,07 
 
 0.30 
 
 31 29.81 
 
 38 34.19 
 
 4-38 
 
 Groom. 2376 . 
 
 . 
 
 36 13-36 
 
 + 0.07 
 
 0.07 
 
 0.32 
 
 36 13.04 
 
 43 17.64 
 
 4.60 
 
 K Ophiuchi . 
 
 . 
 
 44 37-7 
 
 + 0.07 
 
 0.96 
 
 0.24 
 
 44 36.63 
 
 51 4I-I3 
 
 4-50 
 
 d Herculis . 
 
 . 
 
 49 52-82 
 
 + 0.14 
 
 0.28 
 
 0.28 
 
 49 52.40 
 
 56 56.62 
 
 4.22 
 
 a 1 Herculis . 
 
 E. 
 
 9 i 49-27 
 
 + 0.08 
 
 0.85 
 
 4- 0.24 
 
 9 i 48.74 
 
 17 8 53.21 
 
 4-47 
 
 Groom. 966 . 
 
 . 
 
 15 47-77 
 
 o.oo 
 
 6.42 
 
 0.90 
 
 15 40.45 
 
 22 44-95 
 
 4-50 
 
 a Ophiuchi . 
 
 
 
 22 0.29 
 
 o.oo 
 
 0.89 
 
 + 0.24 
 
 22 59.64 
 
 29 4.24 
 
 4.60 
 
 Mean for I7 h o m local sidereal time 
 
 + 87 4.497o'.O2g 
 
 
 
 Normal Equations. 
 
 O= + 3.82 + g.oo(tt + 5.190 9.79*: it = + cf.Scn 
 
 o =+ 24.10 + 5.19 (5/+ 13,970 I2.4ic a = I'.Sso 
 
 o = 20.84 9.79 6t 12. 41 a + 28.44 ' e= + o".234 
 
 SALT LAKE CITY, UTAH TERRITORY, August 6, 1873. 
 
 Name of Star. 
 
 Clamp. 
 
 T 
 
 <5B 
 
 oA 
 
 <:C 
 
 T' 
 
 AR. 
 
 AT 
 
 
 
 h. m. s. 
 
 s. 
 
 s. 
 
 S. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 72 Ophiuchi . . 
 
 E. 
 
 9 54 17-89 
 
 O.OI 
 
 0.82 
 
 + 0.13 
 
 9 54 17.19 
 
 18 I 21.74 
 
 +87 4.55 
 
 /i 1 Sagittarii . 
 
 . 
 
 59 9-42 
 
 0.03 
 
 - 1-45 
 
 + 0.14 
 
 59 8.08 
 
 6 12.47 
 
 4-39 
 
 1 Serpentis . 
 
 . 
 
 10 7 42.86 
 
 0.06 
 
 - 1.05 
 
 + 0.13 
 
 10 7 41.88 
 
 14 46.39 
 
 4.51 
 
 Brad. 2313 . 
 
 . 
 
 14 56.65 
 
 0.06 
 
 1.30 
 
 + 0.14 
 
 14 55-43 
 
 21 59.85 
 
 4.42 
 
 I Aquilas . . 
 
 
 21 16.55 
 
 0.07 
 
 - 1.16 
 
 + 0.13 
 
 21 15-45 
 
 28 19.98 
 
 4-53 
 
 f Lyra; . . . 
 
 W. 
 
 33 21.89 
 
 0.16 
 
 O.II 
 
 - 0.17 
 
 33 21.45 
 
 40 26.04 
 
 4-59 
 
 {* Lyrae . . . 
 
 . 
 
 33 23.76 
 
 0.16 
 
 O.II 
 
 - 0.17 
 
 33 22.32 
 
 40 27.92 
 
 4.60 
 
 /? Lyra; . . . 
 
 
 38 21.56 
 
 O.IO 
 
 0.24 
 
 0.16 
 
 38 21.06 
 
 45 25.55 
 
 4-49 
 
 50 Draconis . 
 
 . 
 
 43 23.76 
 
 O.22 
 
 + 3-40 
 
 0.52 
 
 43 26.42 
 
 50 30.87 
 
 4-45 
 
 f Aquilae 
 
 . 
 
 52 33.02 
 
 0.05 
 
 0.72 
 
 0.14 
 
 52 32.11 
 
 59 36.47 
 
 4.36 
 
 ir Sagittarii . 
 
 
 
 55 12-39 
 
 0.03 
 
 - 1-45 
 
 0.14 
 
 55 10.77 
 
 19 2 15.21 
 
 4-44 
 
 
 + 87 4.485o ! .oi6 
 
 
 
 Normal Equations. 
 
 o=+ 0.31 + 11. oo Si + 3.270 4.63* <!/ = +o .485 
 
 o= + io.84 + 3.27<V + 9. 08 a + 10.82 r a = ~ IB -5 2 5 
 
 o= + is.07 4.63^+ io.82 + 27.60*: c = + OM33 
 
 N 
 
65 
 
 Talcing the mean of the determinations of the corrections of the chronometer, the 
 following table shows the corrections and the adopted rates of the chronometers used at 
 Colorado Springs and Salt Lake City: 
 
 NEGUS 1491. 
 
 Date. 
 
 Local sidereal 
 hour. 
 
 Correction of chronometer. 
 
 Adopted 
 hourly rate. 
 
 1873- 
 July 28 
 
 b. 
 
 17-433 
 
 h. ra. s. s. 
 o 10 10.120 0.020 
 
 s. 
 4- 0.064 
 
 29 
 
 19.067 
 
 11.760 0.014 
 
 + 0.034 
 
 30 
 
 20.000 
 
 12.540 0.020 
 
 4- 0.048 
 
 31 
 
 17-975 
 
 '3-596 0.028 
 
 4- 0.047 
 
 Aug. 2 
 
 16.583 
 
 15-745 0.020 
 
 4- 0.044 
 
 4 
 
 ig-733 
 
 18 081 0.0:4 
 
 4- 0.007 
 
 5 
 
 16.550 
 
 18.220 0.017 
 
 + 0.039 
 
 6 
 
 20.467 
 
 o 10 19.311 0.017 
 
 4- 0.060 
 
 NEGUS 1511. 
 
 Date. 
 
 Local sidereal 
 hour. 
 
 Correction of chronometer. 
 
 Adopted 
 hourly rate. 
 
 1873. 
 July 28 
 
 h. 
 17.0 
 
 h. m. s. s. 
 + 8 7 5-95(> 0.012 
 
 s. 
 0.019 
 
 29 
 
 19. o 
 
 5.478 0.020 
 
 O.OIO 
 
 30 
 
 18.0 
 
 5-455 0.026 
 
 4- 0.009 
 
 31 
 
 17.0 
 
 5-673 0.037 
 
 + O.OO2 
 
 Aug. I 
 
 17.0 
 
 5.727 0.016 
 
 0.024 
 
 2 
 
 19.0 
 
 5.093 0.030 
 
 0.019 
 
 5 
 
 18.0 
 
 4-440 0.040 
 
 4- 0.002 
 
 6 
 
 18.0 
 
 4-8 7 4-491 0.024 
 
 o.ooo 
 
Signals for Determination of Longitude between Salt Lake City, Utah, ami Colorado 
 
 Springs, Colorado Territory. 
 
 
 Arbitrary signals sent from 
 
 Date. 
 
 Salt Lake. 
 
 Colorado Springs. 
 
 
 Colorado Springs 
 
 Salt Lake chronom- 
 
 Colorado Springs 
 
 Salt Lake chronom- 
 
 
 chronometer. 
 
 eter. 
 
 chronometer. 
 
 eter. 
 
 1873. 
 
 h. m, s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 July 29 
 
 18 7 29.91 
 
 9 2I 54-77 
 
 18 13 30.52 
 
 9 27 55-00 
 
 
 40.10 
 
 22 4-gO 
 
 40.52 
 
 28 5.60 
 
 
 50.00 
 
 14.85 
 
 55-10 
 
 20.15 
 
 
 8 O.O2 
 
 24.87 
 
 14 5-62 
 
 30.70 
 
 
 IO.OO 
 
 34-9 
 
 15.96 
 
 41.03 
 
 
 20.00 
 
 44.90 
 
 25.53 
 
 50.60 
 
 
 30. 10 
 
 54.96 
 
 35 S<> 
 
 29 0.62 
 
 
 40.00 
 
 23 4-87 
 
 45-43 
 
 10.50 
 
 
 50.16 
 
 14-97 
 
 55-57 
 
 20.65 
 
 
 59.87 
 
 24.70 
 
 15 5-6o 
 
 30.70 
 
 
 9 10. 16 
 
 34-99 
 
 15.75 
 
 40.85 
 
 
 20.19 
 
 45.00 
 
 25-55 
 
 50.63 
 
 
 30.19 
 
 55.00 
 
 35.48 
 
 30 0.53 
 
 
 40.20 
 
 24 5.00 
 
 46.10 
 
 u.i8 
 
 
 50.18 
 
 15.00 
 
 55.00 
 
 20.09 
 
 
 10 0.17 
 
 25.00 
 
 16 7.00 
 
 32.10 
 
 
 10.40 
 
 35-22 
 
 15.60 
 
 40.70 
 
 
 20.20 
 
 45.03 
 
 25.88 
 
 50.98 
 
 
 30.20 
 
 55-10 
 
 35.10 
 
 31 0.2O 
 
 
 Mean.iS 9 0.108 
 
 Mean. 9 23 24.949 
 
 Mean.iS 15 5.098 
 
 Mean. 9 29 30.169 
 
 
 Arbitrary signals sent from 
 
 Date. 
 
 Salt Lake. 
 
 Colorado Springs. 
 
 
 Colorado Springs 
 
 Salt Lake chronom- 
 
 Colorado Springs 
 
 Salt Lake chronom- 
 
 
 chronometer. 
 
 eter. 
 
 chronometer. 
 
 eter. 
 
 1873- 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 July 30 
 
 18 47 22.40 
 
 10 i 46.37 
 
 18 58 45.11 
 
 10 13 9.48 
 
 
 32.00 
 
 56.00 
 
 55-54 
 
 19.90 
 
 
 4'-97 
 
 2 5.97 
 
 59 5-54 
 
 29.90 
 
 
 51.88 
 
 15.89 
 
 15.61 
 
 40.00 
 
 
 48 2.00 
 
 26.OO 
 
 25.57 
 
 49.92 
 
 
 12. CO 
 
 36.02 
 
 35.60 
 
 5 9 -.94 
 
 
 21.98 
 
 46.OO 
 
 45-51 
 
 14 9.90 
 
 
 32.OO 
 
 56.OO 
 
 55-50 
 
 19.88 
 
 
 42.00 
 
 3 6.00 
 
 .19 o 5.50 
 
 29.86 
 
 
 52.00 
 
 16.00 
 
 15-58 
 
 39-94 
 
 
 49 2.00 
 
 26.00 
 
 25.60 
 
 49-93 
 
 
 12.49 
 
 36.47 
 
 35-59 
 
 59-94 
 
 
 22.00 
 
 46. 10 
 
 45-53 
 
 15 9.90 
 
 
 32.00 
 
 56.00 
 
 56.60 
 
 20.93 
 
 
 42.38 
 
 4 6.38 
 
 I 5-59 
 
 29.90 
 
 
 52-4I 
 
 16.43 
 
 16.67 
 
 41 .00 
 
 
 50 2.50 
 
 26.48 
 
 25.66 
 
 49.98 
 
 
 12.40 
 
 36.41 
 
 35-57 
 
 59-90 
 
 
 22.59 
 
 46.60 
 
 45.60 
 
 16 9.9? 
 
 
 Mean.iS 48 52.158 
 
 Mean.io 3 16.164 
 
 Mean. 19 o 15.656 
 
 Mean.io 14 40.008 
 
67 
 
 Signals for Determination of Lonyitiulc, &c. Continued. 
 
 
 Arbitrary signals sent from 
 
 Dale. 
 
 Salt Lake. 
 
 Colorado Springs. 
 
 
 Colorado Springs 
 
 Salt Lake chronom- 
 
 Colorado Springs 
 
 Salt Lake chronom- 
 
 
 chronometer. 
 
 eter. 
 
 chronometer. 
 
 eter. 
 
 1873. 
 
 hi m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 August 2 
 
 15 37 37-98 
 
 9 5i 59-00 
 
 18 42 55.56 
 
 9 57 16.90 
 
 
 47-31 
 
 52 8.31 
 
 43 5-52 
 
 26.86 
 
 
 57.47 
 
 18.47 
 
 15.60 
 
 36.92 
 
 
 38 7.46 
 
 28.44 
 
 26.53 
 
 47-83 
 
 
 17.55 
 
 3S-54 
 
 36.59 
 
 57-91 
 
 
 27-50 
 
 48.50 
 
 46.49 
 
 58 7.80 
 
 
 38.00 
 
 59.01 
 
 55-54 
 
 16.87 
 
 
 47-79 
 
 53 8.79 
 
 44 5.6o 
 
 26.93 
 
 
 57-51 
 
 18.50 
 
 16.40 
 
 37.71 
 
 
 39 7.64 
 
 28.65 
 
 25.60 
 
 46.90 
 
 
 17-57 
 
 38.55 
 
 35.60 
 
 56.90 
 
 
 27.90 
 
 48.90 
 
 45.56 
 
 59 6.86 
 
 
 37.64 
 
 58.66 
 
 55-53 
 
 16.87 
 
 
 47.80 
 
 54 8.90 
 
 45 8.50 
 
 29.82 
 
 
 57-9 
 
 18.90 
 
 15.53 
 
 36.88 
 
 
 40 7.97 
 
 29.00 
 
 25.59 
 
 46.87 
 
 
 17.81 
 
 38.82 
 
 35-57 
 
 56.85 
 
 
 27.90 
 
 48.90 
 
 45-59 
 
 10 o 6.86 
 
 
 38.00 
 
 59-oq 
 
 55.56 
 
 16.90 
 
 
 Mean. 18 39 7.721 
 
 Mean. 9 53 28.728 
 
 Mean.iS 44 25.914 
 
 Mean. 9 58.47.234 
 
 
 Arbitrary signals from 
 
 Date. 
 
 Colorado Springs. 
 
 Salt Lake. 
 
 
 Colorado Springs 
 
 Salt Lake chronom- 
 
 Colorado Springs 
 
 Salt Lake chronom- 
 
 
 chronometer. 
 
 eter. 
 
 chronometer. 
 
 eter. 
 
 1873- 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 August 5 
 
 18 45 15.62 
 
 9 59 35-14 
 
 18 49 55.38 
 
 10 4 14.66 
 
 
 25.60 
 
 45.10 
 
 50 5-30 
 
 24-50 
 
 
 35-52 
 
 55-00 
 
 15.28 
 
 34.50 
 
 
 45-55 
 
 10 o 5.01 
 
 25-35 
 
 44.60 
 
 
 55.56 
 
 15.02 
 
 35.29 
 
 54-51 
 
 
 46 5.50 
 
 25.00 
 
 45-59 
 
 5 4.85 
 
 
 15.50 
 
 35-00 
 
 55.60 
 
 14.86 
 
 
 25.52 
 
 45.00 
 
 51 5.56 
 
 24.80 
 
 
 35-54 
 
 55-02 
 
 15.50 
 
 34.78 
 
 
 45.58 
 
 i 5.04 
 
 25.42 
 
 44.72 
 
 
 56.54 
 
 16.00 
 
 35.60 
 
 54.85 
 
 
 47 6.59 
 
 26.03 
 
 45-70 
 
 6 4.97 
 
 
 16.57 
 
 36.03 
 
 56.00 
 
 15-32 
 
 
 26.58 
 
 46.02 
 
 52 5-62 
 
 24.90 
 
 
 36.56 
 
 56.00 
 
 15.76 
 
 35-02 
 
 
 45-70 
 
 2 5.18 
 
 25.61 
 
 44.90 
 
 
 55-10 
 
 14.50 
 
 35-68 
 
 54.96 
 
 
 48 5.52 
 
 25.OO 
 
 45.72 
 
 7 5-02 
 
 
 15.54 
 
 35-03 
 
 56.28 
 
 15-50 
 
 
 Mcan.iS 46 45.800 
 
 Mean.io I 5.269 
 
 Mean.lS 51 25.596 
 
 Mean.io 5 44.854 
 
68 
 
 Signals for Determination of Longitude, <(-c. Continued. 
 
 
 Arbitrary signals sent from 
 
 Date. 
 
 Salt Lake. 
 
 Colorado Springs. 
 
 
 Colorado Springs 
 
 Salt Lake chronom- 
 
 Colorado springs 
 
 Salt Lake chronom- 
 
 
 chronometer. 
 
 eter. 
 
 chronometer. 
 
 eter. 
 
 1873- 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 h. m. s. 
 
 Aug. 6 
 
 18 15 35.24 
 
 9 29 53.60 
 
 1 8 24 15.60 
 
 9 38 34-24 
 
 
 45.18 
 
 30 3-59 
 
 25-55 
 
 44.16 
 
 
 55-oo 
 
 13-50 
 
 35-6i 
 
 54-22 
 
 
 16 5.40 
 
 23.80 
 
 45.60 
 
 39 4-21 
 
 
 15.24 
 
 33-05 
 
 55-59 
 
 14.20 
 
 
 25-JQ 
 
 43-53 
 
 25 5-6l 
 
 24.24 
 
 
 35-03 
 
 53-50- 
 
 15.12 
 
 33-6i 
 
 
 45.29 
 
 31 3.65 
 
 25.61 
 
 44-27 
 
 
 55-iS 
 
 13-53 
 
 34-6o 
 
 53-21 
 
 
 17 5.30 
 
 23.69 
 
 44-61 
 
 40 3-24 
 
 
 15.47 
 
 33-86 
 
 54.60 
 
 13.20 
 
 
 25.48 
 
 43-87 
 
 26 4.60 
 
 23.22 
 
 
 35-oo 
 
 53-50 
 
 15-68 
 
 34-30 
 
 
 45-40 
 
 32 3-8o 
 
 25.60 
 
 44-25 
 
 
 55-30 
 
 13.65 
 
 35-00 
 
 53.62 
 
 
 18 5.60 
 
 23.98 
 
 45-10 
 
 41 3.64 
 
 
 15-59 
 
 33-97 
 
 55-62 
 
 14.22 
 
 
 25.64 
 
 44.00 
 
 27 5.60 
 
 24.20 
 
 
 35-Di 
 
 54-3 
 
 16.53 
 
 35-16 
 
 
 Mean.iS 17 5.323- 
 
 Mean . 9 31 23.721 
 
 Mean.iS 25 45.360 
 
 Mean . 9 40 3.969 
 
 July 30, the breaks for the seconds of Salt Lake and Colorado Springs coincide. By meas- 
 uring the differences where I find the full minute, I develop the fact that the Colorado Springs 
 
 chronometer breaks o'.no later than the Salt Lake break ; therefore the mean of the signals sent 
 
 from Salt Lake and received on the Colorado Springs chronograph is, 
 
 i8 h 48 52".048. 
 
 The same happens on August 2. The Colorado Springs chronometer is o'.oqs later than the 
 
 Salt Lake chronometer on the Colorado Springs chronograph ; therefore the mean is, 
 
 i8 h 39 m 7'.626. 
 
Final Results for Longitude. 
 
 Signals sent from 
 
 Stations of record. 
 
 Mean of sig- 
 nals sent and 
 received. 
 
 Time-correc- 
 tion. 
 
 Corrected 
 time. 
 
 Difference of 
 longitude. 
 
 Double 
 wave-time. 
 
 Means. 
 
 I873- 
 July 29. 
 
 Salt Lake . . . . < 
 
 Colo. Springs chron. 
 Salt Lake chron. . . 
 
 h. m. s. 
 18 9 o.i I 
 
 9 23 2 4-95 
 
 h. m. s. 
 o 10 11^72 
 
 + 8 7 5.46 
 
 h. m. s. 
 17 58 48.39 
 
 17 30 30.41 
 
 h. m. s. 
 o 28 17.98 
 
 s, 
 
 s. 
 
 Colorado Springs - < 
 
 Colo. Springs chron. 
 Salt Lake chron. . . 
 
 18 15 5.10 
 9 29 30.17 
 
 o 10 11.72 
 + 8 7 5.46 
 
 18 4 53-38 
 17 36 35-63 
 
 17-75 
 
 0.23 
 
 17.865 
 
 July 3 D. 
 
 
 
 
 
 
 
 
 Salt Lake . . . . J 
 
 Colo. Springs chron. 
 Salt Lake chron. . . 
 
 18 48 52.05 
 10 3 16. 16 
 
 b 10 12.48 
 + 8 7 5.46 
 
 18 38 39-57 
 18 10 21.62 
 
 17-95 
 
 
 
 Colorado Springs . < 
 
 Colo. Springs chron. 
 Salt Lake chron. . . 
 
 19 o 15,66 
 10 14 40.01 
 
 o 10 12.49 
 
 + 8 7 5.46 
 
 18 50 3.17 
 18 21 45.47 
 
 17.70 
 
 0.25 
 
 17.825 
 
 August 2, 
 
 
 
 
 
 
 
 
 Salt Lake . . . . ) 
 
 Colo. Springs chron. 
 Salt Lake chron. . . 
 
 18 39 7-63 
 9 53 28.73 
 
 o 10 15.83 
 + 8 7 S .u 
 
 18 28 51.80 
 18 o 33.84 
 
 17.96 
 
 
 
 Colorado Springs . < 
 
 Colo. Springs chron. 
 Salt Lake chron. . . 
 
 18 44 25.91 
 9 5 8 47- 2 4 
 
 o 10 15.83 
 + 8 7 5.11 
 
 18 34 10.08 
 
 18 5 52-35 
 
 17-73 
 
 0.23 
 
 17-845 
 
 August 5. 
 
 
 
 
 
 
 
 
 Colorado Springs - < 
 
 Colo. Springs chron. 
 Salt Lake chron. . . 
 
 18 46 45.80 
 10 i 5.27 
 
 o 10 18.30 
 
 + 87 4.44 
 
 18 36 27.50 
 18 8 9.71 
 
 17-79 
 
 
 
 Salt Lake . . . . ) 
 
 Colo. Springs chron. 
 Salt Lake chron. . . 
 
 18 51 25.60 
 10 5 44.85 
 
 o 10 18.31 
 
 + 87 4.44 
 
 18 41 7.29 
 18 12 49.29 
 
 18.00 
 
 0.21 
 
 17-895 
 
 August 6. 
 
 
 
 
 
 
 
 
 Salt Lake . . . . J 
 
 Colo. Springs chron. 
 Salt Lake chron. . . 
 
 18 17 5.32 
 9 3' 23.72 
 
 o 10 19.17 
 
 + 87 4.49 
 
 18 6 46.15 
 17 38 28.21 
 
 17.94 
 
 
 
 Colorado Springs . < 
 
 Colo. Springs chron. 
 Salt Lake chron. . . 
 
 18 25 45.36 
 9 4 3-97 
 
 o 10 19.18 
 
 + 87 4.49 
 
 18 15 26.18 
 
 1747 846 
 
 17.72 
 
 O.22 
 
 17.830 
 
 Colorado Springs east of Salt Lak( 
 
 City 
 
 O h 2 8 m i7".852o.oo9 
 
 
70 
 
 Mean Places of Stars for 1873.0, med for Determination of Latitude of Colorado Springs, 
 
 Colorado Territory. 
 
 No. of 
 pair. 
 
 No. in 
 B. A. C. 
 
 Right 
 ascension. 
 
 Declination. 
 
 No. of 
 pair. 
 
 No. in 
 B. A. C. 
 
 Right 
 ascension. 
 
 Declination. 
 
 
 
 h. m. s. 
 
 1 II 
 
 
 
 h. m. s. 
 
 , 
 
 
 5587 
 
 16 34 57 
 
 12 38 35.4 
 
 
 7297 
 
 20 55 5 
 
 39 45 23.86 
 
 I 
 
 5628 
 
 40 3 
 
 64 49 48.4 
 
 2 5 
 
 7320 
 
 58 9 
 
 38 9 23.70 
 
 2 
 
 5747 
 
 56 55 
 
 33 45 14.08 
 
 26 
 
 73&I 
 
 21 6 13 
 
 22 33 45.2 
 
 
 5775 
 
 17 i 13 
 
 43 59 9.46 
 
 
 7401 
 
 13 27 
 
 55 15 54.42 
 
 
 579 
 
 3 38 
 
 40 40 59.86 
 
 ft*! 
 
 7444 
 
 18 55 
 
 25 37 43-49 
 
 3 
 
 5834 
 
 10 38 
 
 36 57 13.04 
 
 *J 
 
 7489 
 
 27 ii 
 
 52 3 36.28 
 
 
 5871 
 
 16 46 
 
 46 21 58.58 
 
 oH 
 
 7505 
 
 29 35 
 
 37 57 56-32 
 
 4 
 
 5927 
 
 26 7 
 
 31 15 15-10 
 
 40 
 
 7521 
 
 3i 52 
 
 39 5<-> 37.7f> 
 
 
 5978 
 
 33 4i 
 
 61 58 18.9 
 
 Of. 
 
 7554 
 
 36 28 
 
 40 13 45.02 
 
 5 
 
 599' 
 
 36 16 
 
 16 o 44.7 
 
 zy 
 
 7566 
 
 38 10 
 
 37 42 10.92 
 
 
 6079 
 
 51 20 
 
 56 53 35-36 
 
 in 
 
 7621 
 
 46 12 
 
 66 12 8.4 
 
 
 6110 
 
 56 57 
 
 20 50 5.7 
 
 3 U 
 
 7641 
 
 50 45 
 
 II 28 27.5 
 
 7 
 
 6i57 
 
 18 3 20 
 
 20 47 46.2 
 
 
 
 
 
 
 
 
 
 
 7683 
 
 57 48 
 
 57 23 17.18 
 
 g 
 
 6238 
 
 16 4 
 
 28 48 39.4 
 
 3 1 
 
 7733 
 
 22 4 30 
 
 20 21 16.4 
 
 
 6255 
 
 18 18 
 
 49 3 28.30 
 
 
 
 
 
 
 
 
 
 
 7757 
 
 7 50 
 
 27 58 46.49 
 
 
 6357 
 
 33 55 
 
 39 33 26.28 
 
 32 
 
 7825 
 
 20 17 
 
 49 45 25-22 
 
 9 
 
 6365 
 
 35 54 
 
 38 15 1.54 
 
 
 
 
 
 IO 
 
 6391 
 
 40 14 
 
 39 28 51.50 
 
 
 7832 
 
 22 17 
 
 - o 40 9.8 
 
 
 
 
 
 33 
 
 7857 
 
 25 44 
 
 78 8 18.1 
 
 
 6468 
 
 50 13 
 
 33 48 27.32 
 
 34 
 
 7874 
 
 28 44 
 
 78 10 19.9 
 
 1 1 
 
 6475 
 
 51 28 
 
 43 46 47-3 
 
 
 
 
 
 
 
 
 
 
 7880 
 
 30 13 
 
 38 58 39-82 
 
 
 6520 
 
 57 51 
 
 46 45 20.56 
 
 35 
 
 Gr.3873 
 
 39 8 
 
 38 32 7-36 
 
 12 
 
 6571 
 
 19 6 54 
 
 31 4 22.42 
 
 
 7931 
 
 38 21 
 
 38 48 1,90 
 
 
 6586 
 
 9 17 
 
 65 45 57-5 
 
 4fS 
 
 7951 
 
 41 18 
 
 - 4 53 13-7 
 
 13 
 
 6615 
 
 13 44 
 
 12 8 35.4 
 
 3 
 
 7990 
 
 47 55 
 
 82 28 47.5 
 
 
 6652 
 
 19 49 
 
 20 I 21.6 
 
 
 8003 
 
 52 51 
 
 II 3 3-3 
 
 14 
 
 6681 
 
 23 29 
 
 57 46 18.90 
 
 37 
 oft 
 
 8039 
 
 58 43 
 
 66 31 29.0 
 
 
 
 
 
 J 
 
 8077 
 
 23 4 55 
 
 66 33 9.5 
 
 
 6698 
 
 27 3 
 
 34 ii 3-32 
 
 
 
 
 
 15 
 
 6720 
 
 30 43 
 
 43 4 2.52 
 
 n 
 
 8147 
 
 16 26 
 
 19 51 47.4 
 
 
 
 
 
 39 
 
 8188 
 
 24 ii 
 
 57 50 55.98 
 
 rA 
 
 6731 
 
 32 42 
 
 44 24 56.30 
 
 40 
 
 Gr.4iio 
 
 32 21 
 
 57 57 5.58 
 
 IO 
 
 6784 
 
 41 36 
 
 33 26 0.74 
 
 
 8296 
 
 45 57 
 
 20 57 54.22 
 
 I? 
 
 6819 
 6852 
 
 46 42 
 51 19 
 
 18 20 49.49 
 59 22 23.28 
 
 41 
 42 
 
 8310 
 8317 
 
 48 3 
 49 12 
 
 56 47 34.04 
 56 42 18.74 
 
 
 
 
 
 
 Gr-42i6 
 
 57 39 
 
 49 9 47.30 
 
 T Q 
 
 6863 
 
 52 51 
 
 57 54 55-94 
 
 43 
 
 8374 
 
 o o i 
 
 28 19 15.15 
 
 1C 
 
 6901 
 
 59 31 
 
 19 37 42.0 
 
 
 28 
 
 6 55 
 
 40 20 3.36 
 
 
 6918 
 
 2O I 40 
 
 51 28 32.38 
 
 44 
 
 67 
 
 14 26 
 
 37 15 53-68 
 
 J 9 
 
 6944 
 
 6 41 
 
 26 6 2.7 
 
 
 87 
 
 18 54 
 
 i 14 10.80 
 
 
 
 
 
 45 
 
 105 
 
 22 45 
 
 76 19 6.8 
 
 20 
 
 6963 
 6998 
 
 9 26 
 13 46 
 
 42 59 40.52 
 34 35 13-28 
 
 46 
 
 121 
 
 178 
 
 24 47 
 
 34 52 
 
 53 49 15-16 
 23 55 57-42 
 
 
 7022 
 
 17 40 
 
 39 51 4-58 
 
 
 2O I 
 
 38 4 
 
 54 31 33.26 
 
 21 
 
 7061 
 
 22 52 
 
 38 i 27.56 
 
 47 
 
 A& 
 
 Gr. 137 
 
 39 o 
 
 54 36 37.4 
 
 
 
 
 
 4 
 
 250 
 
 48 10 
 
 22 56 25.71 
 
 22 
 
 7084 
 7101 
 
 26 10 
 
 28 29 
 
 36 30 32.70 
 
 41 2 24.58 
 
 49 
 
 285 
 33 
 
 55 52 
 I 2 8 
 
 31 7 18.84 
 46 33 49.88 
 
 
 7140 
 
 32 51 
 
 20 45 23.4 
 
 en 
 
 357 
 
 5 49 
 
 31 24 3-54 
 
 2 3 
 
 7189 
 
 39 8 
 
 56 55 44.74 
 
 5 U 
 
 441 
 
 22 30 
 
 46 21 4-10 
 
 
 7243 
 
 45 37 
 
 50 18 41.56 
 
 C T 
 
 474 
 
 28 42 
 
 48 4 23.02 
 
 2 4 
 
 7256 
 
 49 8 
 
 27 34 33-o8 
 
 D 1 
 
 5M 
 
 34 29 
 
 29 24 13.5 
 
71 
 
 Observations for Latitude. Station, Colorado Springs. 
 
 Date. 
 
 No. of 
 star. 
 
 Microm. 
 reading. 
 
 Level. 
 
 Remarks. 
 
 Date. 
 
 No. of 
 star. 
 
 Microm. 
 reading. 
 
 Level. 
 
 Remarks. 
 
 N. 
 
 S. 
 
 N. 
 
 S. 
 
 1873- 
 
 
 t. d. 
 
 d. 
 
 d. 
 
 
 1873. 
 
 
 t. d. 
 
 d. 
 
 d. 
 
 
 Julysi 
 
 7505 
 
 6 10. 6 
 
 24.0 
 
 28.0 
 
 Air very undu- 
 
 Aug. 2 
 
 6238 
 
 2 62.8 
 
 24.0 
 
 17.7 
 
 
 
 7521 
 
 15 i.3 
 
 28.3 
 
 24.0 
 
 lating. 
 
 
 6255 
 
 15 0.7 
 
 8.3 
 
 33-4 
 
 
 
 7554 
 7566 
 
 17 54-2 
 I 57.2 
 
 31.0 
 17.0 
 
 21.3 
 35-3 
 
 Changed length 
 of bubble. 
 
 
 6357 
 6365 
 
 13 31-0 
 4 53-2 
 
 20.0 
 II.9 
 
 22.0 
 29-4 
 
 Very faint. 
 
 
 7621 
 
 II 6.9 
 
 19.5 
 
 14.0 
 
 
 
 6391 
 
 8 95.0 
 
 23.0 
 
 19-3 
 
 
 
 7641 
 
 9 96.0 
 
 9-7 
 
 24.6 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 6468 
 
 II 94.6 
 
 21. 
 
 21.8 
 
 
 
 7683 
 
 13 5-3 
 
 18.0 
 
 16.0 
 
 
 
 6475 
 
 8 8.1 
 
 17.0 
 
 26.0 
 
 
 
 7733 
 
 8 2.8 
 
 15.5 
 
 18.5 
 
 
 
 
 
 
 
 
 
 7757 
 
 7 80.9 
 
 17.3 
 
 16.8 
 
 
 
 6520 
 
 14 39-0 
 
 24.4 
 
 18.7 
 
 
 
 7825 
 
 12 72.6 
 
 31.0 
 
 3.o 
 
 
 
 6571 
 
 4 36-4 
 
 9.3 
 
 33-4 
 
 
 
 7832 
 
 16 70.9 
 
 22. O 
 
 ii. 3 
 
 
 
 6586 
 
 17 10.2 
 
 21.8 
 
 20.9 
 
 Changed in- 
 
 
 7857 
 
 5 96.4 
 
 I3.O 
 
 20.3 
 
 
 
 6615 
 
 2 31.2 
 
 2.3-9 
 
 18.5 
 
 clination. 
 
 
 7874 
 
 7 93-6 
 
 13.3 
 
 20.3 
 
 
 
 6652 
 
 6 63.0 
 
 iS.o 
 
 24.6 
 
 
 
 7951 
 
 10 89.2 
 
 18.0 
 
 16.8 
 
 
 
 6681 
 
 14 89.3 
 
 30.4 
 
 12.3 
 
 
 
 7990 
 
 7 41-6 
 
 26.O 
 
 9.0 
 
 
 
 6698 
 
 3 52.3 
 
 20.8 
 
 22. 
 
 
 
 8003 
 
 12 23.5 
 
 16.8 
 
 18.2 
 
 
 
 6720 
 
 15 iI-5 
 
 27.0 
 
 16.0 
 
 
 
 8039 
 8077 
 
 7 68.5 
 9 33-i 
 
 26.3 
 
 25-7 
 
 8.7 
 9-7 
 
 
 
 6731 
 6784 
 
 15 Si.o 
 4 56.9 
 
 23.9 
 17.3 
 
 19.0 
 26.2 
 
 
 
 8147 
 8188 
 Gr.4iio 
 
 5 97-1 
 9 37-4 
 15 32.3 
 
 15.0 
 31.2 
 
 31.0 
 
 20.9 
 
 5-0 
 5.0 
 
 
 
 6819 
 
 6852 
 
 7 75-5 
 ii 64.6 
 
 18.0 
 28.6 
 
 26.0 
 16.0 
 
 
 
 8296 
 8310 
 
 10 27.5 
 16 17.1 
 
 18.0 
 18.0 
 
 17-9 
 18.0 
 
 
 
 6863 
 6901 
 
 5 25.6 
 ii 67.0 
 
 26.0 
 16.5 
 
 18.4 
 28.5 
 
 
 
 8317 
 
 ii 11.4 
 
 18.0 
 
 18.0 
 
 
 
 6918 
 
 8 12.0 
 
 18.9 
 
 26.2 
 
 
 
 Gr.42i6 
 
 5 39-0 
 
 18.0 
 
 18.3 
 
 
 
 6944 
 
 12 52.4 
 
 30.9 
 
 14.4 
 
 
 
 8374 
 
 15 31-5 
 
 21.2 
 
 15.0 
 
 
 
 6963 
 
 7 75-8 
 
 21.7 
 
 23.6 
 
 
 
 28 
 
 8 17.5 
 
 16.4 
 
 20. o 
 
 
 
 6998 
 
 ii 90.7 
 
 26.0 
 
 19-5 
 
 
 
 67 
 
 ii 56.7 
 
 16.3 
 
 20. o 
 
 
 
 7022 
 
 6 49.0 
 
 20.5 
 
 25.2 
 
 
 
 87 
 
 12 22.0 
 
 17.3 
 
 19.0 
 
 
 
 7061 
 
 3 54-0 
 
 32.9 
 
 13-3 
 
 
 
 105 
 
 6 34.0 
 
 18.9 
 
 iS.o 
 
 
 
 7084 
 
 12 98.9 
 
 20.9 
 
 25.0 
 
 
 Aug. 2 
 
 5587 
 
 13 2.6 
 
 16.0 
 
 25-4 
 
 Air little undu- 
 
 
 7101 
 
 6 98.9 
 
 29-4 
 
 16.9 
 
 
 
 5628 
 
 2 83.9 
 
 41-5 
 
 
 lating. 
 
 
 7140 
 
 8 9.8 
 
 22.5 
 
 23.0 
 
 
 
 5747 
 
 7 23.7 
 
 19.8 
 
 22.3 
 
 
 
 7189 
 
 10 5.3 
 
 3L7 
 
 14.8 
 
 
 
 5775 
 
 12 27.8 
 
 21.8 
 
 20.3 
 
 
 
 7243 
 
 16 77.0 
 
 18.6 
 
 28.0 
 
 Faint. 
 
 
 579 
 
 8 79.0 
 
 21.3 
 
 20.7 
 
 
 
 7256 
 
 3 20.0 
 
 32-3 
 
 14-3 
 
 
 
 5834 
 
 9 79-8 
 
 14.3 
 
 27.9 
 
 
 
 7297 
 
 16 55.0 
 
 26.0 
 
 21. 
 
 
 
 5978 
 
 18 32.0 
 
 22.3 
 
 19.5 
 
 
 
 7320 
 
 i 57.0 
 
 20.3 
 
 27.2 
 
 
 
 599' 
 
 - o 78.7 
 
 13.0 
 
 29.0 
 
 
 
 7361 
 
 4 -o.l 
 
 25.0 
 
 22.8 
 
 
 
 6079 
 
 ii 34-6 
 
 25.0 
 
 17.0 
 
 
 
 7401 
 
 14 82.5 
 
 27.9 
 
 20. 2 
 
 
 
 6110 
 
 7 8.9 
 
 9-3 
 
 32.0 
 
 
 
 7444 
 
 9 14.0 
 
 25-7 
 
 22.2 
 
 
 
 6157 
 
 9 35-1 
 
 8.0 
 
 33-6 
 
 
 
 7489 
 
 ii 21.9 
 
 25.0 
 
 23.3 
 
 
72 
 
 Observations for Latitude. Station, Colorado Springs Continued. 
 
 Date. 
 
 No. of 
 star. 
 
 Microm. 
 reading. 
 
 Level. 
 
 Remarks. 
 
 Date. 
 
 No. of 
 star. 
 
 Microm. 
 reading. 
 
 Level. 
 
 Remarks. 
 
 N. 
 
 S. 
 
 N. 
 
 S. 
 
 1873- 
 
 
 t. d. 
 
 d. 
 
 d. 
 
 
 1873- 
 
 
 t. d. 
 
 d. 
 
 d. 
 
 
 Aug. 2 
 
 7505 
 
 .5 48.0 
 
 24.7 
 
 23.5 
 
 
 Aug. 4 
 
 357 
 
 6 96.9 
 
 23.0 
 
 21 .O 
 
 
 
 7521 
 
 14 45.6 
 
 24.6 
 
 23-5 
 
 Cloudy. 
 
 
 441 
 
 12 63.9 
 
 25.8 
 
 18.3 
 
 
 4 
 
 7505 
 
 5 50.6 
 
 24-3 
 
 15-5 
 
 Air good. 
 
 
 474 
 
 5 60.8 
 
 21. S 
 
 22.2 
 
 
 
 7521 
 
 M 23.7 
 
 3-0 
 
 37-0 
 
 
 
 5M 
 
 16 5-3 
 
 I 4 .8 
 
 29.0 
 
 
 
 7554 
 
 17 79-8 
 
 22.6 
 
 17-3 
 
 
 5 
 
 6238 
 
 2 96.0 
 
 19.8 
 
 15.0 
 
 Very heavv 
 
 
 7566 
 
 I 83.1 
 
 7-4 
 
 32-7 
 
 
 
 6255 
 
 15 39-t 
 
 1.0 
 
 35-4 
 
 wind. 
 
 
 7621 
 
 10 19.3 
 
 23.9 
 
 16.2 
 
 Changed the 
 
 
 6652 
 
 6 41.2 
 
 15.0 
 
 21. 
 
 
 
 7641 
 
 9 10.0 
 
 5.0 
 
 35.3 
 
 inclination. 
 
 
 6681 
 
 M 59-7 
 
 21.6 
 
 15-0 
 
 
 
 7683 
 
 12 44.7 
 
 22.7 
 
 18.0 
 
 
 
 6698 
 
 3 41-8 
 
 2O. 2 
 
 16.0 
 
 
 
 7733 
 
 7 26.9 
 
 23.O 
 
 18.0 
 
 ( 
 
 
 6720 
 
 M 87.3 
 
 16.0 
 
 21.0 
 
 
 
 7757 
 
 7 21. o 
 
 25.2 
 
 15.8 
 
 
 
 6731 
 
 15 13-4 
 
 20.2 
 
 17.0 
 
 
 
 7825 
 
 12 4.6 
 
 20.7 
 
 21. 
 
 
 
 6784 
 
 3 84-3 
 
 17.9 
 
 20. 1 
 
 
 
 7832 
 
 15 53-0 
 
 23.0 
 
 18.3 
 
 
 
 6819 
 
 6 99.0 
 
 iS.o 
 
 20. o 
 
 
 
 7857 
 
 4 88.9 
 
 23.8 
 
 I 7 .8 
 
 
 
 6852 
 
 10 95.0 
 
 28.0 
 
 10.2 
 
 
 
 7874 
 
 6 86.5 
 
 23.6 
 
 18.0 
 
 
 
 6863 
 
 6 50.4 
 
 22.4 
 
 16.0 
 
 
 
 7880 
 
 9 46.8 
 
 20.3 
 
 21. 
 
 Wrong setting. 
 
 
 6901 
 
 12 83.0 
 
 17.5 
 
 21. 
 
 
 
 Gr. 3873 
 
 17 49-3 
 
 30.0 
 
 "3 
 
 
 
 6918 
 
 8 5-6 
 
 17.3 
 
 21.2 
 
 
 
 795i 
 
 10 20. 8 
 
 23.0 
 
 18.4 
 
 
 
 6944 
 
 12 53.0 
 
 21. 
 
 17.2 
 
 
 
 7990 
 
 6 63.9 
 
 20.3 
 
 21. 
 
 
 
 6963 
 
 8 27.0 
 
 20.8 
 
 18.0 
 
 
 
 8003 
 
 ii 59.9 
 
 17.9 
 
 23.0 
 
 
 
 6998 
 
 12 36.0 
 
 22.4 
 
 16.5 
 
 
 
 8039 
 
 7 7-0 
 
 27.4 
 
 I4.O 
 
 
 
 7022 
 
 15 64.0 
 
 25.8 
 
 13-9 
 
 
 
 8077 
 
 8 68.5 
 
 27.8 
 
 14.8 
 
 
 
 7061 
 
 2 64.9 
 
 19.0 
 
 20. o 
 
 
 
 8i47 
 
 5 42.0 
 
 19.8 
 
 22.8 
 
 
 
 7084 
 
 12 22.5 
 
 21.3 
 
 17-3 
 
 
 
 8188 
 
 8 91 .0 
 
 33.7 
 
 9.0 
 
 
 
 7101 
 
 6 18.0 
 
 19.3 
 
 20. o 
 
 
 
 Gr. 4110 
 
 14 83.0 
 
 32.7 
 
 9.8 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 7140 
 
 7 71-8 
 
 20. o 
 
 19.2 
 
 
 
 8296 
 
 9 51.0 
 
 28.0 
 
 14.5 
 
 
 
 7189 
 
 9 55.2 
 
 18.0 
 
 21.3 
 
 
 
 8310 
 
 15 46.0 
 
 14.0 
 
 28.6 
 
 
 
 
 
 
 
 
 
 8317 
 
 10 38.9 
 
 13.5 
 
 29.2 
 
 
 
 7243 
 
 16 70.0 
 
 20.3 
 
 19.0 
 
 
 
 
 
 
 
 
 
 7256 
 
 3 19.6 
 
 16.6 
 
 23.0 
 
 
 
 Gr. 4216 
 
 5 4-3 
 
 24.7 
 
 18.0 
 
 
 
 
 
 
 
 
 
 8374 
 
 14 99-5 
 
 16.6 
 
 26.0 
 
 
 
 7297 
 
 16 44.0 
 
 23-9 
 
 15.8 
 
 
 
 
 
 
 
 
 
 7320 
 
 I 60.5 
 
 9.0 
 
 30.8 
 
 
 
 28 
 
 7 99.1 
 
 25.0 
 
 18.0 
 
 
 
 
 
 
 
 
 
 67 
 
 ii 26.2 
 
 20.3 
 
 22.3 
 
 
 
 7361 
 
 4 18.0 
 
 23-3 
 
 16.0 
 
 
 
 
 
 
 
 
 
 7401 
 
 14 12.7 
 
 9.8 
 
 30.0 
 
 
 
 87 
 
 ii 44.4 
 
 22. 
 
 20.8 
 
 
 
 
 
 
 
 
 
 105 
 
 5 70.3 
 
 25.6 
 
 17.3 
 
 
 
 7444 
 
 10 34.0 
 
 18.0 
 
 21.8 
 
 
 
 
 
 
 
 
 
 7489 
 
 12 40.9 
 
 24-3 
 
 15 7 
 
 
 
 121 
 
 ii 58.0 
 
 17.3 
 
 25-7 
 
 
 
 
 
 
 
 
 
 I 7 8 
 
 5 88.5 
 
 28.8 
 
 14.5 
 
 
 
 7505 
 
 5 71*0 
 
 24.5 
 
 15.0 
 
 
 
 
 
 
 
 
 
 7521 
 
 14 60.3 
 
 10.8 
 
 29.0 
 
 
 
 2O I 
 
 4 49-3 
 
 ig.O 
 
 24-3 
 
 
 
 
 
 
 
 
 
 
 9 35-0 
 
 15-3 
 
 28.0 
 
 
 
 7554 
 
 18 30.9 
 
 23.5 
 
 16.6 
 
 
 
 250 
 
 15 42.0 
 
 27.O 
 
 16.3 
 
 
 
 7566 
 
 2 21. 
 
 14.8 
 
 25.8 
 
 
 
 285 
 
 9 26.5 
 
 18.0 
 
 25.3 
 
 
 
 7621 
 
 9 77.0 
 
 20. o 
 
 21. 
 
 
 
 33 
 
 II II. 2 
 
 32.0 
 
 12.0 
 
 
 
 7641 
 
 8 44.8 
 
 23-3 
 
 18.0 
 
 
73 
 
 Observations for Latitude. Station, Colorado Springs Continued. 
 
 Date. 
 
 No. of 
 star. 
 
 Microm. 
 reading. 
 
 Level. 
 
 Remarks. 
 
 Date. 
 
 No. of 
 star. 
 
 Microm. 
 reading. 
 
 Level. 
 
 Remarks. 
 
 N. 
 
 S. 
 
 N. 
 
 S. 
 
 1873. 
 
 
 t. d. 
 
 d. 
 
 d. 
 
 
 1873. 
 
 
 t. d. 
 
 d. 
 
 d, 
 
 
 Aug. 5 
 
 7683 
 
 12 54.6 
 
 19.9 
 
 22. 
 
 
 Aug. 6 
 
 7683 
 
 12 87.7 
 
 20. 
 
 14.0 
 
 
 
 7733 
 
 7 42.1 
 
 22. 
 
 2O. O 
 
 
 
 7733 
 
 7 62.5 
 
 21. 
 
 J3-3 
 
 
 
 7757 
 
 6 86.9 
 
 ig.O 
 
 23.O 
 
 
 
 7832 
 
 15 20.5 
 
 2O. 2 
 
 '5-3 
 
 
 
 7825 
 
 n 67.5 
 
 24.7 
 
 iS.o 
 
 
 
 7857 
 
 4 43-o 
 
 12. 
 
 23.6 
 
 
 
 7832 
 
 15 72-1 
 
 20.3 
 
 22.0 
 
 
 7874 
 
 6 40.9 
 
 12.2 
 
 23.5 
 
 
 
 7857 
 
 4 98.5 
 
 20.2 
 
 22.0 
 
 
 
 
 
 
 
 
 
 7S74 
 
 6 94.2 
 
 20.3 
 
 22. O 
 
 
 
 7880 
 
 13 7-0 
 
 2O. 2 
 
 15.0 
 
 
 
 
 
 
 
 
 
 7931 
 
 5 9 6 -9 
 
 14-5 
 
 20.8 
 
 
 
 7880 
 
 12 8o.O 
 
 21.6 
 
 20.8 
 
 
 
 
 
 
 
 
 
 7931 
 
 5 63.8 
 
 21.5 
 
 21.4 
 
 
 
 795' 
 
 10 71.0 
 
 I 4 .8 
 
 20.3 
 
 
 
 7951 
 
 II 1.5" 
 
 23.0 
 
 19.8 
 
 
 
 7990 
 
 7 21.4 
 
 '5-4 
 
 19.9 
 
 
 
 7990 
 
 7 35-8 
 
 13-5 
 
 29.3 
 
 
 
 8003 
 
 12 17.8 
 
 19.9 
 
 15.0 
 
 
 
 8003 
 
 II 84.0 
 
 24.8 
 
 18.0 
 
 
 
 8039 
 
 7 54-9 
 
 13.0 
 
 22. 
 
 
 
 8039 
 
 7 19-8 
 
 15.4 
 
 28.0 
 
 
 
 8077 
 
 9 16.2 
 
 13.0 
 
 22.0 
 
 
 
 8077 
 
 8 79.2 
 
 14.4 
 
 29.0 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 8i47 
 
 5 91-0 
 
 I8. 4 
 
 17.2 
 
 
 
 8147 
 
 5 33-1 
 
 26.0 
 
 17.9 
 
 
 
 8iS8 
 
 9 17-3 
 
 13-0 
 
 23.0 
 
 
 
 8188 
 
 8 56.3 
 
 13.0 
 
 31.0 
 
 
 
 Gr. 4110 
 
 15 10.3 
 
 12.8 
 
 23.2 
 
 Cloudy. 
 
 
 Gr.4iio 
 
 14 50.0 
 
 13-7 
 
 31-5 
 
 
 
 
 
 
 
 
 
 8296 
 
 9 39-3 
 
 30.0 
 
 13-5 
 
 
 7 
 
 7297 
 
 16 75.0 
 
 17.9 
 
 14.7 
 
 
 
 8310 
 
 15 27.1 
 
 10.3 
 
 33-2 
 
 
 
 7320 
 
 I 71.7 
 
 16.0 
 
 17-3 
 
 
 
 8317 
 
 10 19.4 
 
 9.8 
 
 33-7 
 
 
 
 736i 
 
 5 77-7 
 
 15.3 
 
 18.2 
 
 
 
 Gr.42l6 
 
 5 21.0 
 
 23.5 
 
 19.8 
 
 
 
 7401 
 
 16 0.9 
 
 29.0 
 
 4.6 
 
 
 
 8374 
 
 15 19-4 
 
 13.8 
 
 29-5 
 
 
 
 7444 
 
 9 78.5 
 
 16.7 
 
 17.0 
 
 
 
 28 
 
 8' 5-0 
 
 19.0 
 
 25.0 
 
 
 
 7489 
 
 II 89 . O 
 
 20. o 
 
 14.0 
 
 
 
 67 
 
 II 31.0 
 
 25.2 
 
 18.8 
 
 
 
 7505 
 
 5 64.7 
 
 19.8 
 
 13.8 
 
 
 
 87 
 
 II 66 . 5 
 
 27.2 
 
 17.0 
 
 
 
 7521 
 
 14 74-1 
 
 18.0 
 
 15.8 
 
 
 
 105 
 
 5 80.4 
 
 12 6 
 
 32.0 
 
 
 
 7554 
 
 17 81.2 
 
 19.0 
 
 14.9 
 
 
 
 121 
 
 n 85.1 
 
 20. o 
 
 24.7 
 
 
 
 7566 
 
 I 63.6 
 
 17.0 
 
 16.3 
 
 
 
 I 7 8 
 
 6 18.9 
 
 24.0 
 
 21.3 
 
 
 
 7621 
 
 10 19.0 
 
 18.5 
 
 16.0 
 
 
 
 201 
 
 4 48.9 
 
 23.6 
 
 22. O 
 
 
 
 7641 
 
 8 86.0 
 
 18.9 
 
 16.0 
 
 
 
 
 9 40.4 
 
 23.3 
 
 22.3 
 
 
 
 7683 
 
 12 99 . I 
 
 16.0 
 
 18.3 
 
 
 
 250 
 
 15 50.8 
 
 19.0 
 
 27.4 
 
 
 
 7733 
 
 7 84.2 
 
 20.3 
 
 14.0 
 
 
 
 28 5 
 
 8 41.6 
 
 22.3 
 
 23-5 
 
 
 
 7757 
 
 7 33-3 
 
 19.0 
 
 15-3 
 
 
 
 339 
 
 10 20.9 
 
 25.9 
 
 20.3 
 
 
 
 7825 
 
 12 37.0 
 
 31.0 
 
 
 
 
 357 
 
 7 3-7 
 
 26.0 
 
 19.7 
 
 
 
 7832 
 
 15 95-9 
 
 20. o 
 
 15.0 
 
 I5'aft< r merid. 
 
 
 44t 
 
 12 78.4 
 
 "5-5 
 
 30.3 
 
 
 
 7857 
 
 5 46.2 
 
 29.8 5-5 
 
 15' after merid. 
 
 
 474 
 
 5 33-7 
 
 18.6 
 
 25.0 
 
 
 | 7874 
 
 7 45-0 
 
 29.7 6.0 
 
 1 5 s after merid. 
 
 
 514 
 
 15 68.0 
 
 25.0 19.0 
 
 
 
 7880 
 
 '3 75-3 
 
 13.9 21.4 
 
 1 5* after merid. 
 
 6 
 
 7554 
 
 17 64.0 
 
 21.7 12.0 
 
 Air very good. 
 
 
 7931 
 
 6 36.2 
 
 35-4 o.o 
 
 15' after merid. 
 
 
 7566 
 
 I 46.9 
 
 15.8 18.3 
 
 
 
 8003 
 
 n 79.0 
 
 19.4 If). 2 
 
 Changed incl'n. 
 
 
 7621 
 
 9 95-3 
 
 13.7 20.3 
 
 
 8039 
 
 7 25-4 
 
 18.9 | 16.9 
 
 
 
 7641 
 
 8 60. 1 
 
 25.0 
 
 9.0 
 
 
 
 8077 
 
 8 86.6 
 
 18.6 
 
 17-3 
 
 
74 
 Observations for Latitude. Station, Colorado Springs Continued. 
 
 
 
 
 Level. 
 
 
 
 
 
 Level. 
 
 
 Date. 
 
 No. of 
 star. 
 
 Microm. 
 reading. 
 
 
 Remarks. 
 
 Date. 
 
 No. of 
 star. 
 
 Microm. 
 reading. 
 
 
 Remarks. 
 
 
 
 
 
 
 
 
 N. 
 
 S. 
 
 
 
 
 
 N. 
 
 S. 
 
 
 1873- 
 
 
 t. d. 
 
 d. 
 
 d. 
 
 
 1873. 
 
 
 t. d. 
 
 d. 
 
 d. 
 
 
 Aug. 7 
 
 8147 
 
 5 80.5 
 
 19.8 
 
 16.8 
 
 
 Aug. 9 
 
 5747 
 
 7 25-0 
 
 18.0 
 
 21.6 
 
 
 
 8188 
 
 9 21.2 
 
 20.3 
 
 16.6 
 
 
 
 5775 
 
 12 36.0 
 
 27.0 
 
 13.0 
 
 
 
 Gr. 4110 
 
 15 14.2 
 
 20.3 
 
 16.6 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 5790 
 
 9 22.8 
 
 iQ-5 
 
 20.4 
 
 
 
 8296 
 
 10 45-3 
 
 22. 
 
 14.8 
 
 
 
 5834 
 
 10 11.7 
 
 22. 
 
 18.0 
 
 
 
 8310 
 
 16 46.5 
 
 17.3 
 
 19.8 
 
 
 
 
 
 
 
 
 
 8317 
 
 II 38.9 
 
 17.0 
 
 20. 2 
 
 
 
 5871 
 
 8 46.8 
 
 22.3 
 
 17.9 
 
 
 
 
 
 
 
 
 
 5927 
 
 to 34.2 
 
 16.0 
 
 25.0 
 
 
 
 Gr. 4216 
 8374 
 
 4 85.3 
 14 90.6 
 
 19.6 
 
 8.3 
 
 I 7 .6 
 2g.O 
 
 
 
 5978 
 
 18 74.0 
 
 I8. 5 
 
 22.6 
 
 
 
 
 
 
 
 
 
 5991 
 
 o 62.7 
 
 30.3 
 
 10.8 
 
 
 
 28 
 
 8 42.0 
 
 22. 
 
 15-2 
 
 
 
 
 
 
 
 
 
 7 
 
 II 76.1 
 
 9-7 
 
 28.2 
 
 
 
 6079 
 
 12 24.2 
 
 24.0 
 
 17.9 
 
 
 
 
 
 
 
 
 
 6110 
 
 7 90-9 
 
 16.0 
 
 26.0 
 
 
 
 87 
 
 II 92.6 
 
 18.0 
 
 19.6 
 
 
 
 6157 
 
 10 16.0 
 
 16.3 
 
 25.9 
 
 Cloudy, heavy 
 
 
 105 
 
 6 8.0 
 
 14-7 
 
 22.9 
 
 
 
 
 
 
 
 rain, and storm. 
 
 
 
 
 
 
 
 
 7444 
 
 IO I.O 
 
 19.0 
 
 24.3 
 
 
 
 121 
 
 ii 88.3 
 
 17-3 
 
 20. 2 
 
 
 
 7489 
 
 12 23.2 
 
 34-0 
 
 9-7 
 
 
 
 I 7 8 
 
 6 30.3 
 
 15.2 
 
 22.2 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 7505 
 
 6 14.6 
 
 26.0 
 
 16.0 
 
 
 
 2OI 
 
 4 59-9 
 
 20. o 
 
 17-3 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 7521 
 
 15 28.7 
 
 21.8 
 
 21.8 
 
 
 
 
 9 54-6 
 
 21.8 
 
 15.9 
 
 
 
 
 
 
 
 
 
 250 
 
 15 77-0 
 
 I.O 
 
 36.O 
 
 
 
 8003 
 
 ii 93.5 
 
 25.0 
 
 19.5 
 
 Cloudy; thro' 
 
 
 474 
 514 
 
 5 68.4 
 16 24.0 
 
 17.3 
 5.9 
 
 20. 2 
 
 31-8 
 
 Cloudy. 
 
 
 8039 
 
 8077 
 
 7 52.0 
 9 23.2 
 
 30.0 
 30.4 
 
 14.5 
 
 14.0 
 
 clouds. 
 Setting of mic. 
 uncertain. 
 
75 
 
 Computations for Latitude. Station, Colorado Springs. 
 
 Date. 
 
 dumber 
 of pair. 
 
 Half-sum of dec- 
 linations. 
 
 Corrections. 
 
 Latitude. 
 
 Mic. and ref. 
 
 Level. 
 
 Meridian. 
 
 1873- 
 
 
 o , 
 
 , 
 
 /. 
 
 ,. 
 
 < // 
 
 July 31 
 
 28 
 
 38 54 19.62 
 
 4 36.72 
 
 + 0.08 
 
 o.oo 
 
 38 49 42.98 
 
 
 29 
 
 58 0.46 
 
 - 8 16.16 
 
 2.36 
 
 o.oo 
 
 41.94 
 
 
 30 
 
 50 18.86 
 
 - o 34.45 
 
 - 2.59 
 
 o.oo 
 
 41.82 
 
 
 31 
 
 52 IQ.IO 
 
 2 36.11 
 
 0.27 
 
 o.oo 
 
 42.72 
 
 
 32 
 
 52 7-84 
 
 - 2 32.75 
 
 + 7-83 
 
 o.oo 
 
 42.92 
 
 * 
 
 33 
 
 44 6.75 
 
 + 5 33-88 
 
 + 0.93 
 
 o.oo 
 
 41.56 
 
 
 34 
 
 45 7-6i 
 
 + 4 32.34 
 
 + 1. 01 
 
 o.oo 
 
 40.96 
 
 
 36 
 
 47 49-29 
 
 + I 48.02 
 
 4- 5-01 
 
 o.oo 
 
 42.32 
 
 
 37 
 
 47 18.07 
 
 + 2 21.36 
 
 + 4-45 
 
 o.oo 
 
 43-88 
 
 
 38 
 
 48 8.24 
 
 + I 30.23 
 
 + 4-01 
 
 o.oo 
 
 42.48 
 
 
 39 
 
 51 23.23 
 
 - I 45-73 
 
 + 5-58 
 
 o.oo 
 
 43.08 
 
 
 40 
 
 54 27.92 
 
 - 4 50.57 
 
 + 5-52 
 
 o.oo 
 
 42.87 
 
 
 4' 
 
 52 45.50 
 
 - 3 3-19 
 
 o.oo 
 
 o.oo 
 
 42.31 
 
 
 42 
 
 50 7-84 
 
 o 26.07 
 
 o.oo 
 
 o.oo 
 
 41.77 
 
 
 43 
 
 44 32.40 
 
 + 5 8.36 
 
 + 1.63 
 
 o.oo 
 
 42.39 
 
 
 44 
 
 47 59-51 
 
 + i 45.38 
 
 2.00 
 
 o.oo 
 
 42.89 
 
 
 45 
 
 46 41.05 
 
 + 3 2-72 
 
 O.22 
 
 o.oo 
 
 43-55 
 
 Aug. 2 
 
 I 
 
 38 44 17-10 
 
 4- 5 16.52 
 
 + 8.83 
 
 o.oo 
 
 38 49 42.45 
 
 
 2 
 
 52 18.27 
 
 2 36.61 
 
 - 0.27 
 
 o.oo 
 
 41-39 
 
 
 3 
 
 49 12.95 
 
 + o 31.09 
 
 - 3-58 
 
 o.oo 
 
 40.46 
 
 
 5 
 
 59 37-08 
 
 - 9 53.67 
 
 - 3-63 
 
 o.oo 
 
 39-78 
 
 
 6 
 
 51 56.02 
 
 2 12.26 
 
 4-03 
 
 + 0.30 
 
 40 03 
 
 
 7 
 
 50 46.29 
 
 - i 1-99 
 
 - 4-84 
 
 + 0.30 
 
 39-76 
 
 
 8 
 
 46 9-43 
 
 6 24.60 
 
 - 5-14 
 
 o.oo 
 
 39-69 
 
 
 9 
 
 54 19-47 
 
 - 4 32.73 
 
 - 5-36 
 
 + 0.04 
 
 41.42 
 
 
 10 
 
 52 2.04 
 
 2 17.25 
 
 - 3-79 
 
 o.oo 
 
 41.04 
 
 
 n 
 
 47 42.42 
 
 + 2 O.O7 
 
 2.69 
 
 o.oo 
 
 39.8o 
 
 
 12 
 
 54 56.64 
 
 - 5 "-SO 
 
 5.06 
 
 + 0.04 
 
 40.08 
 
 
 13 
 
 57 20.68 
 
 - 7 39-54 
 
 + 1-73 
 
 o.oo 
 
 42.91 
 
 
 14 
 
 53 53-73 
 
 - 4 16.72 
 
 + 3-i6 
 
 o.oo 
 
 40.17 
 
 
 15 
 
 55 37-74 
 
 6 0.15 
 
 + 2.69 
 
 o.oo 
 
 40.28 
 
 
 16 
 
 55 33-12 
 
 - 5 49- 2 4 
 
 I. 10 
 
 o.oo 
 
 42.78 
 
 
 17 
 
 51 40.50 
 
 2 0.84 
 
 + 1.26 
 
 o.oo 
 
 40.92 
 
 
 18 
 
 46 23.19 
 
 + 3 19.28 
 
 1. 21 
 
 o.oo 
 
 41.26 
 
 
 19 
 
 47 21. 81 
 
 + 2 16.82, 
 
 + 2.53 
 
 o.oo 
 
 41.16 
 
 
 20 
 
 47 3I-I7 
 
 +2 8.90 
 
 + 1.26 
 
 o.oo 
 
 41.33 
 
 
 21 
 
 56 20.23 
 
 6 42.34 
 
 + 4-12 
 
 o.oo 
 
 42.01 
 
 
 22 
 
 46 32.70 
 
 + 3 6.41 
 
 + 2.31 
 
 o.oo 
 
 41.42 
 
 
 23 
 
 50 37-75 
 
 - I 0.74 
 
 + 4.51 
 
 o.oo 
 
 41.52 
 
 
 24 
 
 56 41.06 
 
 7 I. 60 
 
 + 2.36 
 
 o.oo 
 
 41.80 
 
 
 25 
 
 57 27.43 
 
 - 7 45-41 
 
 - 0.55 
 
 o.oo 
 
 41.47 
 
 
 26 
 
 54 53-13 
 
 - 5 14-55 
 
 + 2.72 
 
 o.oo 
 
 41.30 
 
 
 27 
 
 50 43.09 
 
 - i 4-59 
 
 + 1-43 
 
 o.oo 
 
 39-93 
 
 
 28 
 
 54 20.25 
 
 - 4 38.88 
 
 + 0.63 
 
 o.oo 
 
 42.00 
 
 4 
 
 28 
 
 38 54 20.87 
 
 4 31.26 
 
 - 6.93 
 
 o.oo 
 
 38 49 42.68 
 
 
 29 
 
 58 1.72 
 
 8 16.08 
 
 - 5-50 
 
 o.oo 
 
 40.14 
 
 
 30 
 
 50 19.96 
 
 - o 33.94 
 
 6.21 
 
 o.oo 
 
 39.81 
 
 
 31 
 
 52 20.47 
 
 2 40.89 
 
 + 2.67 
 
 o.oo 
 
 42.25 
 
 
 32 
 
 52 9.08 
 
 2 30.25 
 
 + 2.50 
 
 o.oo 
 
 41-33 
 
 
 33 
 
 44 7-72 
 
 + 5 30.66 
 
 + 2.94 
 
 o.oo 
 
 41-32 
 
 
 34 
 
 45 8.56 
 
 + 4 29.25 
 
 + 2.83 
 
 o.oo 
 
 40.64 
 
Computation for Latitude. Station, Colorado Sprinys Continued. 
 
 Date. 
 
 Number 
 of pair. 
 
 Half-sum of dec- 
 linations. 
 
 Corrections. 
 
 Latitude. 
 
 Mic.and ref 
 
 Level. 
 
 Meridian. 
 
 1873- 
 
 
 , 
 
 / 
 
 ,, 
 
 
 
 , ,1 
 
 Aug. 4 
 
 35 
 
 38 45 26.65 
 
 + 4 9-33 
 
 + 4-95 
 
 o.oo 
 
 38 49 40.93 
 
 
 3f> 
 
 47 50-22 
 
 + i 50.91 
 
 + I. 10 
 
 o.oo 
 
 42.23 
 
 
 :; 
 
 47 i9-'8 
 
 + 2 20.71 
 
 + 2.28 
 
 o.oo 
 
 42.17 
 
 
 38 
 
 48 9-34 
 
 4- I 30.54 
 
 + 2.17 
 
 o.oo 
 
 42.05 
 
 
 39 
 
 51 24.36 
 
 - I 48.43 
 
 + 5-97 
 
 o.oo 
 
 41.90 
 
 
 40 
 
 54 29.04 
 
 - 4 52.37 
 
 + 5-50 
 
 o.oo 
 
 42.17 
 
 
 4i 
 
 52 46.58 
 
 - 3 4-87 
 
 0.30 
 
 o.oo 
 
 41.41 
 
 
 42 
 
 50 8.94 
 
 - o 27.31 
 
 - 0.60 
 
 0.00 
 
 41.03 
 
 
 43 
 
 44 33-51 
 
 +5 9-20 
 
 - 0.74 
 
 0.00 
 
 41.97 
 
 
 44 
 
 48 0.60 
 
 + I 41. 6T 
 
 + 1-37 
 
 o.oo 
 
 43.58 
 
 
 45 
 
 46 41.93 
 
 + 2 58.41 
 
 + 2.61 
 
 o.oo 
 
 42.95 
 
 
 46 
 
 52 36.80 
 
 2 56.95 
 
 + 1.65 
 
 o.oo 
 
 41.50 
 
 
 47 
 
 44 1.61 
 
 + 5 39-49 
 
 + 1.48 
 
 o.oo 
 
 42.58 
 
 
 48 
 
 46 33.68 
 
 + 3 8.59 
 
 - 0.55 
 
 o.oo 
 
 41.72 
 
 
 49 
 
 50 36.07 
 
 - o 57.39 
 
 + 3-49 
 
 0.00 
 
 42.17 
 
 
 50 
 
 52 35-44 
 
 2 56.16 
 
 + 2.61 
 
 o.oo 
 
 41.89 
 
 
 51 
 
 44 19.92 
 
 + 5 24.52 
 
 4.01 
 
 0.00 
 
 40.43 
 
 5 
 
 14 
 
 38 53 55.48 
 
 - 4 14-31 
 
 + 0.16 
 
 o.oo 
 
 38 49 41.33 
 
 
 '5 
 
 55 38.54 
 
 - 5 55.89 
 
 O.22 
 
 o.oo 
 
 42.43 
 
 
 16 
 
 55 33-94 
 
 5 50.80 
 
 + 0.27 
 
 o.oo 
 
 43.41 
 
 
 17 
 
 51 41.30 
 
 2 3.04 
 
 + 4-45 
 
 o.oo 
 
 42.71 
 
 
 18 
 
 46 24.00 
 
 + 3 16.55 
 
 4- 0.80 
 
 o.oo 
 
 41.35 
 
 
 19 
 
 47 22.65 
 
 + 2 18.81 
 
 + 0.03 
 
 o.oo 
 
 41.49 
 
 
 20 
 
 47 32.05 
 
 + 2 7.06 
 
 + 2.39 
 
 o.oo 
 
 41.50 
 
 
 21 
 
 56 21. IT 
 
 6 43.62 
 
 + 3-oo 
 
 o.oo 
 
 40.49 
 
 
 22 
 
 46 33.60 
 
 + 3 7-71 
 
 + 0.91 
 
 o.oo 
 
 42.22 
 
 
 23 
 
 50 38.61 
 
 - o 56.98 
 
 0.69 
 
 o.oo 
 
 40.94 
 
 
 24 
 
 56 41.96 
 
 - 6 59.55 
 
 1.40 
 
 o.oo 
 
 41.01 
 
 
 25 
 
 57 28.36 
 
 7 40.90 
 
 - 3-77 
 
 o.oo 
 
 43.69 
 
 
 26 
 
 54 54-04 
 
 5 9-o6 
 
 - 3-55 
 
 o.oo 
 
 41.43 
 
 
 27 
 
 50 44.02 
 
 i 4.28 
 
 + 1.32 
 
 o.oo 
 
 41.06 
 
 
 28 
 
 54 21.19 
 
 - 4 36.30 
 
 - 2.39 
 
 o.oo 
 
 42.50 
 
 
 29 
 
 58 2.03 
 
 8 20.18 
 
 - J-I3 
 
 o.oo 
 
 40.72 
 
 
 30 
 
 50 20.23 
 
 o 41.07 
 
 + 1.18 
 
 o.oo 
 
 40.34 
 
 
 31 
 
 52 20.61 
 
 2 39.25 
 
 0.03 
 
 o.oo 
 
 41.33 
 
 
 32 
 
 52 9-39 
 
 2 29.32 
 
 + 0.74 
 
 o.oo 
 
 40.81 
 
 
 33 
 
 44 7.96 
 
 + 5 33-62 
 
 0.96 
 
 o.oo 
 
 40.62 
 
 
 34 
 
 45 8.81 
 
 + 4 32.80 
 
 0.94 
 
 0.00 
 
 40.70 
 
 
 35 
 
 53 24.22 
 
 - 3 42.42 
 
 + 0.25 
 
 o.oo 
 
 42.05 
 
 
 36 
 
 47 50.47 
 
 + i 53.65 
 
 - 3-47 
 
 o.oo 
 
 40.65 
 
 
 37 
 
 47 19-46 
 
 + 2 24.22 
 
 - 1.59 
 
 o.oo 
 
 42.09 
 
 
 38 
 
 48 9.61 
 
 + I 34-70 
 
 - 2.14 
 
 o.oo 
 
 42.17 
 
 
 39 
 
 51 24.65 
 
 I 40.42 
 
 2.72 
 
 o.oo 
 
 41.51 
 
 
 40 
 
 54 29.34 
 
 - 4 44.89 
 
 2.67 
 
 o.oo 
 
 41.78 
 
 
 41 
 
 52 46.87 
 
 - 3 2.65 
 
 - 1.76 
 
 o.oo 
 
 42.56 
 
 
 42 
 
 50 9.22 
 
 o 24.89 
 
 2.03 
 
 o.oo 
 
 48.30 
 
 
 43 
 
 44 33.78 
 
 + 5 10.19 
 
 - 3-30 
 
 0,00 
 
 40.67 
 
 
 44 
 
 48 0.87 
 
 + i 41.30 
 
 + o.n 
 
 o.oo 
 
 42.28 
 
 
 45 
 
 46 42.16 
 
 + 3 2.13 
 
 - 2.53 
 
 o.oo 
 
 41.76 
 
 
 46 
 
 52 37-05 
 
 - 2 55-93 
 
 - 0.55 
 
 o.oo 
 
 40.57 
 
 
 47 
 
 44 1.87 
 
 + 5 42-35 
 
 - 1.87 
 
 o.oo 
 
 42.35 
 
 
 48 
 
 46 33-93 
 
 .+. 3 9-65 
 
 2.03 
 
 o.oo 
 
 41.55 
 
77 
 
 Computations for Latitude. Station, Colorado Springs Continued 
 
 Date. 
 
 Number 
 of pair. 
 
 Half-sum of dec- 
 linations. 
 
 Corrections. 
 
 Latitude. 
 
 Mic. and ref. 
 
 Level. 
 
 Meridian. 
 
 1873- 
 
 
 , ,. 
 
 * a 
 
 
 
 M 
 
 , 
 
 Aug. 5 
 
 49 
 
 38 50 36.36 
 
 - o 55-71 
 
 + 1. 21 
 
 o.oo 
 
 38 49 41.86 
 
 
 5 
 
 52 35-67 
 
 2 50.17 
 
 - 2.34 
 
 o.oo 
 
 43.16 
 
 
 51 
 
 44 20.15 
 
 + 5 21.35 
 
 O.II 
 
 0.00 
 
 41.39 
 
 6 
 
 29 
 
 38 58 2.34 
 
 - 8 22.41 
 
 + 1.98 
 
 o.oo 
 
 38 49 41.91 
 
 
 30 
 
 50 20.51 
 
 - o 42.00 
 
 + 2.58 
 
 o.oo 
 
 41.09 
 
 
 31 
 
 52 20.90 
 
 - 2 43.18 
 
 + 3-77 
 
 o.oo 
 
 41.49 
 
 
 33 
 
 44 8 . 20 
 
 + 5 34.84 
 
 - 1.84 
 
 o.oo 
 
 41.20 
 
 
 34 
 
 45 9-05 
 
 + 4 33-33 
 
 - I. 7 6 
 
 o.oo 
 
 40.62 
 
 
 35 
 
 53 24.54 
 
 - 3 40.63 
 
 0.30 
 
 0.00 
 
 43-61 
 
 
 36 
 
 47 50.71 
 
 + I 54.85 
 
 - 2.75 
 
 o.oo 
 
 42.81 
 
 
 37 
 
 47 19-75 
 
 + 2 23.82 
 
 - 1.13 
 
 o.oo 
 
 42.44 
 
 
 38 
 
 48 9.89 
 
 + I 33-71 
 
 - I- 13 
 
 o.oo 
 
 42.47 
 
 
 39 
 
 5i 24.94 
 
 - I 41-39 
 
 - 2.42 
 
 o.oo 
 
 41.13 
 
 
 40 
 
 54 29.62 
 
 - 4 45-64 
 
 - 2.53 
 
 o.oo 
 
 41.45 
 
 7 
 
 25 
 
 38 57 28.97 
 
 - 7 47-05 
 
 0.52 
 
 o.oo 
 
 38 49 41.40 
 
 
 26 
 
 54 54-62 
 
 5 17-90 
 
 + 3-i6 
 
 o.oo 
 
 39-88 
 
 
 27 
 
 50 44-96 
 
 - i 5.4i 
 
 + 1-57 
 
 o.oo 
 
 41.12 
 
 
 28 
 
 54 21.81 
 
 4 42 15 
 
 + 2.23 
 
 o.oo 
 
 41.89 
 
 
 29 
 
 58 2.66 
 
 8 22.63 
 
 + 1-32 
 
 0.00 
 
 41-35 
 
 
 30 
 
 50 20.77 
 
 o 41.32 
 
 + 1.48 
 
 o.oo 
 
 40.93 
 
 
 3i 
 
 52 21.20 
 
 - 2 39.99 
 
 + I.IO 
 
 o.oo 
 
 42.31 
 
 
 32 
 
 52 10.01 
 
 - 2 46.49 
 
 + 9-54 
 
 o.oo 
 
 43-06 
 
 
 33 
 
 44 8 . 46 
 
 + 5 26.19 
 
 + 8.06 
 
 o.oo 
 
 42.71 
 
 
 34 
 
 45 9-29 
 
 + 4 29.41 
 
 + 7-89 
 
 o.oo 
 
 41-59 
 
 
 35 
 
 53 24.86 
 
 - 3 49.63 
 
 + 7-70 
 
 +- 0.06 
 
 42-99 
 
 
 37 
 
 47 20.02 
 
 + 2 30.93 
 
 + 1-43 
 
 o.oo 
 
 42-38 
 
 
 38 
 
 48 10.18 
 
 + I 30.85 
 
 + 1.24 
 
 o.oo 
 
 42.27 
 
 
 39 
 
 51 25.22 
 
 - I 45.86 
 
 + 1.84 
 
 o.oo 
 
 41.20 
 
 
 40 
 
 54 29.91 
 
 - 4 50.11 
 
 + 1.84 
 
 0.00 
 
 41.64 
 
 
 41 
 
 52 47-44 
 
 - 3 6.79 
 
 + 1.29 
 
 o.oo 
 
 41.94 
 
 
 42 
 
 50 9-79 
 
 o 29.08 
 
 4- I.IO 
 
 o.oo 
 
 41.81 
 
 
 43 
 
 44 34-35 
 
 + 5 '2.31 
 
 - 5-14 
 
 o.oo 
 
 41.52 
 
 
 44 
 
 48 1-43 
 
 + i 43-79 
 
 3.22 
 
 o.oo 
 
 42.00 
 
 
 45 
 
 46 42.62 
 
 + 3 1-67 
 
 2.69 
 
 o.oo 
 
 41.60 
 
 
 46 
 
 52 37-52 
 
 2 53.38 
 
 2.72 
 
 o.oo 
 
 41.42 
 
 
 47 
 
 44 2.38 
 
 + 5 47-07 
 
 - 8.88 
 
 o.oo 
 
 40.57 
 
 
 48 
 
 46 34-45 
 
 + 3 13-37 
 
 8.00 
 
 o.oo 
 
 39-82 
 
 
 51 
 
 44 20.60 
 
 + 5 27.95 
 
 - 7.92 
 
 o.oo 
 
 40.63 
 
 9 
 
 2 
 
 38 52 19.24 
 
 - 2 38.76 
 
 + 2.86 
 
 o.oo 
 
 38 49 43.34 
 
 
 3 
 
 49 13-96 
 
 + o 27.62 
 
 + 0.85 
 
 o.oo 
 
 42.43 
 
 
 4 
 
 48 44.25 
 
 + o 58.23 
 
 1.26 
 
 o.oo 
 
 41.22 
 
 
 5 
 
 59 38.12 
 
 -io 1.74 
 
 + 4-23 
 
 o.oo 
 
 40.61 
 
 
 6 
 
 51 57.25 
 
 2 14.62 
 
 - 1.07 
 
 o.oo 
 
 41.56 
 
 
 7 
 
 50 47-51 
 
 - I 4.69 
 
 0.96 
 
 o.oo 
 
 41.86 
 
 
 27 
 
 50 45-21 
 
 - I 9-03 
 
 + 5-23 
 
 0.00 
 
 4I-4I 
 
 
 28 
 
 54 22.43 
 
 4 44-00 
 
 + 2.86 
 
 o.oo 
 
 41.29 
 
 
 37 
 
 47 20.56 
 
 + 2 17.17 
 
 + 5-77 
 
 + 0.19 
 
 43-88 
 
 
 38 
 
 48 10.77 
 
 + 2 26.IO 
 
 4- 6. 02 
 
 + 0.19 
 
 43.28 
 
 Mean latitude of Colorado Springs, Colorado . . 38 49' 4i".67 o".O35 
 
78 
 
 The observations for latitude were made under very unfavorable circumstances. 
 Undulations in the atmosphere, heavy winds, and great changes in temperature con- 
 stantly affected the instrument. 
 
 It is customary in this office to select for latitude only thirty-five pairs of stars, 
 which have to be observed on five different nights. But the observer is dependent 
 upon the weather, and is frequently disappointed, although after waiting I preferred to 
 select a greater number of pairs, believing that the final result of a latitude is better 
 when depending upon various star-places, giving the probability that the errors result- 
 ing from the declination-places of the stars will more nearly compensate each other, 
 and that this part of the probable error of the final result will come within that result- 
 ing from observation alone. 
 
 The mean latitude is obtained by taking the mean of all single results. For the 
 different days the mean latitude is found to be as follows: 
 
 O I II 
 
 July 31 . 38 49 42.491 
 
 August 2 4 T -O43 
 
 4 41.702 
 
 5 41-652 
 
 6 41.864 
 
 7 41-585 
 
 9 - - 41-947 
 
 showing a great difference between the first and second day, arising from the disturbed 
 condition of the air. 
 
 The probable error of one observation is, 
 
 , 0.6745 
 
 '"^ , n _ 1 
 
 where v is the difference between the mean results and the single results and n the 
 number of observations; therefore the probable error of the mean result is, 
 
 , = 0.6745 
 
 / S(v? 
 \/ (n-i) 
 
 If it is proper to place all the observations in the final result with the same weight 
 (as in determining the longitude of a station from different nights' work) the formula 
 should be used in this way; but in determining the latitude of a station, every single 
 result obtained also depends upon the places of the stars forming the different pairs. 
 It is certainly wrong to determine the probable error of the latitude-result by this for- 
 mula, (it would give, for latitude of Colorado Springs, a probable error less than o".oi,) 
 
79 
 
 though it is frequently done. If nearly the same number of stars are observed every 
 night under the same conditions, I should prefer to determine the probable error of 
 the final result after the manner of Mr. John H. Clark. 
 
 Let- 
 Probable error of one pair of stars, including constant errors 
 
 of zenith-telescope observations = f 
 
 Probable error of one observation rr e 
 
 Number of pairs used at the station m 
 
 Number of observations . 
 
 then probable error of the final result, 
 
 The formula shows that if the stars used are not very good, it is then better to 
 select a larger number of pairs of stars, giving the probability that the final result will 
 be more independent of the declinations. 
 
 From all the observations of pairs of stars observed on three or more nights, I 
 find the probable error of one observation 
 
 and that of the final result, 
 
 Taking the value for e f , found by Maj. C. B. Comstock, of the United States Lake 
 Survey, for stars taken from Professor Safford's Catalogue for 98! Stars, o".53, 
 the probable uncertainty of the final result will be, rbo".o82. 
 
 Resulting Astronomical Co-ordinates for the Astronomical Monument at Colorado Springs, 
 Colorado Territory, using, for the longitude of Washington and Salt Lake, the same data 
 as in Clark's report. 
 
 In time. In arc. 
 
 h. m. s. 
 
 Longitude . . . i 51 4.888 27 46 1 3.30 west of Washington. 
 
 6 59 17.008 104 49 15.10 west of Greenwich. 
 
 Latitude (north) ..... 38 49 41.67 o".o35 
 
 Respectfully submitted. 
 
 DR. F. KAMPF, 
 Civilian Astronomical Assistant. 
 First Lieut. GrEO. M. WHEELER, 
 
 Corps of Engineers, in charge. 
 
UNITED STATES ENGINEER OFFICE, 
 GEOGRAPHICAL AND GEOLOGICAL EXPLORATIONS AND SURVEYS 
 
 WEST OF THE IOOTH MERIDIAN, May i, 1873. 
 
 Memorandum of istructions for conducting observations for longitude and latitude at a main or primary astronomical station 
 
 for the field-season of 1873. 
 
 The fixed observatory, with which connection will be made, is in Temple Square, 
 Salt Lake City, Utah, and in charge of Assistant John H. Clark. Every observer is 
 responsible for the receiving of the signals from the connecting-stations for certain re- 
 ductions of results, as full as possible, and will follow such other instructions that may, 
 from time to time, be given. This station will be changed during the season, probably 
 in the month of August, to the United States engineer observatory, to be constructed 
 at Ogden, Utah. 
 
 i. Observations for Longitude. 
 
 In carrying on the astronomical campaign, preference will be given to the longi- 
 tude-results for those nights that are clear at both stations; that is, the observers in 
 charge, after having completed the necessary arrangements for the observations and 
 exchange of signals, will, from this time on, exchange signals each night that shall be 
 fair at the two stations, unless unavoidable difficulties arise to prevent. 
 
 It will be carefully observed that weather-signals are sent by telegraph each 
 evening about 6 p. m. while the exchanges are going on and until the full series at 
 a station shall have been completed. In case of uncertainty as to the possibility for 
 observing for anyone night, this ma}' be indicated in the first dispatch; and subsequent 
 dispatch or dispatches, between this time and 10 p. m., shall determine whether 
 exchanges shall be made that night or not. 
 
 Some convenient and concise form will be adopted for the weather-signals, and 
 in no case must there be a failure as regards forwarding them. 
 
 It may be admissible, contingent upon the stage of the prosecution of the work, 
 should the weather at Salt Lake at about 6 p. m. look unfavorable, that the observer 
 at the distant station should at once conclude to take that night for latitude-work, 
 which may be done after informing the observer at the Salt Lake or the receiving 
 station. 
 
 For the conducting of the observations for the exchanges for a single night, the 
 following instructions will be adhered to: The transit of stars for time-determinations, 
 consisting of not less than three time and two circumpolar stars in each position 
 of the instrument, both before and after the transmission of the signals, will be taken. 
 Of course, should the night be sufficiently clear, so that it seems possible to make the 
 time-determinations at both stations, by the modification of the above, so that at 
 one or both of the stations the transits of stars may be made entirely before or 
 entirely after the sending of the signals, the strict following-out of the above is not 
 necessary. 
 
 These instructions are made with the understanding that a twenty-six or thirty- 
 
81 
 
 two inch Wiirdemann instrument is used, with recording-apparatus in shape of a 
 chronograph or register. 
 
 The time set for the transmission of signals should be as near 9.30 p. m. local 
 time of the Salt Lake meridian as possible; and great care should be taken that both 
 observers shall be on hand simultaneously, so that as little delay as possible shall ensue 
 in the use of the telegraph-wires. 
 
 In the transmission of signals the record is to be made upon the chronograph or 
 register at the two places over a space of five minutes in time, the connecting or Salt 
 Lake station sending for the first five minutes arid the distant station receiving, and 
 rice rcrxa. 
 
 In addition to these, which may be known as the chronograph-signals, arbitrary 
 signals will be sent, by the use of a. break-circuit key, at about ten seconds apart, at 
 fractional parts of a second, making a series of thirty-one arbitrary signals during 
 the five minutes. 
 
 In order that the observer at a station may conclude that he has accomplished 
 six nigl its of first-class observations, it becomes necessary that there should be an 
 exchange of the approximate results. Each observer will therefore send to the other, 
 upon each subsequent night or as soon thereafter as practicable, the approximate error 
 of his chronometer and the mean of seven arbitrary signals, sent and received, selected 
 from the middle of the set of thirty-one. This may be concisely expressed in a 
 telegram. 
 
 For the full satisfaction of an observer at the distant station, such further compu- 
 tation shall be sent and received as shall seem necessary to a clear understanding of 
 the case; as an observer will be held responsible should he leave the station and go to 
 another before he is certain that the results upon final computation would prove 
 satisfactory. 
 
 2. Observations for Latitude. 
 
 These will be conducted through five complete and clear nights, so that there shall 
 not be less than 175 pairs of observations upon 35 separate and distinct pairs of stars, 
 each pair of which observations shall give a first-class result. 
 
 These instructions are furnished to the observers with a view to their clearly 
 understanding the class of results intended, and will always be carried out, unless 
 unforeseen difficulties arise, in which event, as the observers will not hereafter be 
 within speedy communication of these headquarters, it will be necessary for them to 
 adopt immaterial modifications upon their own responsibility. It is, of course, under- 
 stood that each observer is responsible for and receives the credit of his own work. 
 
 A report will be made by each observer, at intervals not exceeding fifteen days, 
 of the work under his charge. 
 
 A full daily journal will be kept by each observer. Great care will be taken as 
 to the character of the record upon this journal, which should be clear and explicit. 
 The position of the station in reference to surrounding natural objects should be 
 clearly described, and imperishable meridian-marks firmly planted. When possible, a 
 special survey and plat will be made. 
 11 
 
82 
 
 * 
 
 The day following- an exchange of the chronographic record of time and exchange- 
 signals, said signals will be carefully copied into a record-book, which, like all other 
 records, must be made in duplicate. 
 
 It is intended that computations in the field shall be carried on to such an extent 
 as circumstances may permit. 
 
 The time that can be allotted to each of these stations, in order to accomplish the 
 expected results for the season, is from twenty to twenty-five nights; and as observa- 
 tions are required only for eleven nights, the remaining- interval should be employed 
 in computation. 
 
 The order of sequence for an astronomical report is furnished herewith, and the 
 records and journal will be so kept as to comprise all the data necessary for the full 
 expression of results in accordance therewith. 
 
 Official : 
 
 GEO. M. WHEELER, 
 
 First Lieutenant Corps of Ei/f/htrrr*, hi 
 
U.S. Engireer dept. 
 Report. 
 
 .'...I.' 
 U5A5