Report Upon the Determination of the 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, First Lieut. George M. Wheeler, Corps of Engineers, in Charge. Dr. F. Kampf and J. H. Clark, Civilian Astronomical AssistantsU.S. Government Printing Office, 1874 - 82 pages |
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Page 3
... chronometers . Grouping of series of exchange of signals Personal equation Probable error . Resulting longitude Reduction of the latitude observations Mean places of stars used for determination of latitude Observations for latitude ...
... chronometers . Grouping of series of exchange of signals Personal equation Probable error . Resulting longitude Reduction of the latitude observations Mean places of stars used for determination of latitude Observations for latitude ...
Page 8
... chronometer after the mean of the wires is cor- rected for rate and level . 4T , adopted mean error of chronometer . = & T = 4T。— 4T . 4Terror of the chronometer . v difference between mean final correction of chronometer and 4T ...
... chronometer after the mean of the wires is cor- rected for rate and level . 4T , adopted mean error of chronometer . = & T = 4T。— 4T . 4Terror of the chronometer . v difference between mean final correction of chronometer and 4T ...
Page 13
... 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 ...
... 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 ...
Page 28
... chronometers used at Cheyenne and Salt Lake City : CHEYENNE . - NEGUS 1499 . Date . Local sidereal hour . Correction of chronometer . Rate per hour . 1872 . h . h . m . S. October 5 22.50 - I 52 55.725 14 23.50 43.130 + 0.058 16 23.00 ...
... chronometers used at Cheyenne and Salt Lake City : CHEYENNE . - NEGUS 1499 . Date . Local sidereal hour . Correction of chronometer . Rate per hour . 1872 . h . h . m . S. October 5 22.50 - I 52 55.725 14 23.50 43.130 + 0.058 16 23.00 ...
Page 51
... 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 ...
... 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 ...
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Common terms and phrases
12-Year Cat 21h local sidereal 30 late 30m local sidereal 50 Draconis 61 Cygni 9 Draconis Aquarii August bB aA cC Capricorni Cassiopeia Ceti Cheyenne chron chronograph chronom Clamp Cloudy all day Colo Colorado Springs chronometer COLORADO TERRITORY Computations for Latitude Correction of chronometer Date Delphini Description of observatory eter final result Groom Groombridge 3241 Groombridge 4163 Half-sum of dec HARVARD COLLEGE OBSERVATORY Herculis July 30 latitude Observations Latitude of Cheyenne LATITUDE-OBSERVATIONS-Continued Level linations Mean at 24h Mean for 19h Meridian Micrometer Remarks Micrometer star Name of Star nights Normal Equations Number Half-sum Observations for Latitude.-Station October 14 October 16 Pegasi Piscium probable error REDUCTION Right Ascension Salt Lake chron SALT LAKE CITY SALT LAKE OBSERVATORY Springs chron T. D. Oct TABLES OF TIME-REDUCTIONS Tabulation of Stars TIME-REDUCTIONS AT RECEIVING-STATION-Continued UNIFORM TABLES Ursa Minoris UTAH TERRITORY wires Wyoming Territory ΔΤ ΙΟ Ο.ΟΙ
Popular passages
Page 53 - Ocean, the first thing which strikes us is, that, the north-east and south-east monsoons, which are found the one on the north and the other on...
Page 5 - Printing-Office, and that fifteen hundred copies be furnished on requisition from this Office. Very respectfully, your obedient servant, AA HUMPHREYS, Brigadier-Oeneral and Chief of Engineers.