Report Upon the Determination of the Astronomical Coordinates 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 MeridianU.S. Government Printing Office, 1874 - 82 pages |
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Page 51
... operations at a new station . It had but a single pen , which recorded clock - signals and those made by the observer . 1 For time - observations and exchange , sidereal chronometer 51 Description of instruments used.
... operations at a new station . It had but a single pen , which recorded clock - signals and those made by the observer . 1 For time - observations and exchange , sidereal chronometer 51 Description of instruments used.
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 : Break Circuit Key Chronograph ...
... 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 : Break Circuit Key Chronograph ...
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 30m local sidereal 50 Draconis 61 Cygni 9 Draconis Aquarii August bB aA cC Capricorni Cassiopeiæ Ceti Cheyenne chron chronograph chronom circuit Clamp Cloudy all day Colo Colorado Springs chronometer COLORADO TERRITORY Computations for Latitude Correction of chronometer Delphini eter final result Groom Groombridge 3241 Groombridge 4163 Half-sum of dec Herculis instrument July 28 July 30 Latitude of Cheyenne LATITUDE-OBSERVATIONS-Continued Level linations longitude Mean at 24h Mean for 17h Micrometer star Name of Star nights Normal Equations Number Half-sum O.II Observations for Latitude.-Station October 14 October 19 Pegasi personal equation Piscium probable error REDUCTION Remarks Right Ascension Sagittarii Salt Lake chron SALT LAKE CITY SALT LAKE OBSERVATORY Springs chron ß Lyræ 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