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 7
... 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 ...
... 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 ...
Page 8
... wires and corrected for rate . T'observed time corrected for instrumental errors . AR . apparent right ascension of star . 4 Tresulting error of the chronometer after the mean of the wires is cor- rected for rate and level . 4T ...
... wires and corrected for rate . T'observed time corrected for instrumental errors . AR . apparent right ascension of star . 4 Tresulting error of the chronometer after the mean of the wires is cor- rected for rate and level . 4T ...
Page 13
... 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 ...
... 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 ...
Page 15
... 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 ...
... 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 ...
Page 51
... wire was used after switching in the Western 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 ...
... wire was used after switching in the Western 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 ...
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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.