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 51
... operations at a new station . operations at a new station . It had but a single pen , which recorded clock - signals and those made by the observer . For time - observations and exchange , sidereal chronometer No. 51.
... operations at a new station . operations at a new station . It had but a single pen , which recorded clock - signals and those made by the observer . For time - observations and exchange , sidereal chronometer No. 51.
Page 52
... exchange , sidereal chronometer No. 1491 , Negus , was always used . The galvanic connections were made by means of a switch - board , the connections of which are given in the following diagram : 1 Break Circuit Key Chronograph Local ...
... exchange , sidereal chronometer No. 1491 , Negus , was always used . The galvanic connections were made by means of a switch - board , the connections of which are given in the following diagram : 1 Break Circuit Key Chronograph Local ...
Page 80
... exchange signals each night that shall be fair at the two stations , unless unavoidable difficulties arise to ... exchanges are going on and until the full series at a station shall have been completed . In case of uncertainty as to the ...
... exchange signals each night that shall be fair at the two stations , unless unavoidable difficulties arise to ... exchanges are going on and until the full series at a station shall have been completed . In case of uncertainty as to the ...
Page 81
... 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 ...
... 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 ...
Page 82
... 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 ...
... 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 ...
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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.