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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Results 1-5 of 6
Page 13
... Chronograph . The record of the observations for time , as well as the exchange of signals , with one exception ( the night of the 14th ) , was made by means of the chronograph , of the form contrived by Professor Harkness , United ...
... Chronograph . The record of the observations for time , as well as the exchange of signals , with one exception ( the night of the 14th ) , was made by means of the chronograph , of the form contrived by Professor Harkness , United ...
Page 30
... 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 , Error = 0.6745 A √ Σ ( v2 ) ( n − 1 ) = ± 0 ′′ .017 . n − ( 14. ) RESULTING LONGITUDE ...
... 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 , Error = 0.6745 A √ Σ ( v2 ) ( n − 1 ) = ± 0 ′′ .017 . n − ( 14. ) RESULTING LONGITUDE ...
Page 51
... 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 ...
... 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 ...
Page 52
... Chronograph Local Battery Chronometer XXI XII Relay VILLIX 3 11 Sounder I SWITCH 1. - Closed when receiving from connected station ; Nos . 2 and 3 open . SWITCH 2. - Closed when sending to connected station ; Nos . 1 and 3 open . SWITCH ...
... Chronograph Local Battery Chronometer XXI XII Relay VILLIX 3 11 Sounder I SWITCH 1. - Closed when receiving from connected station ; Nos . 2 and 3 open . SWITCH 2. - Closed when sending to connected station ; Nos . 1 and 3 open . SWITCH ...
Page 68
... chronograph is , 18h 48m 528.048 . The same happens on August 2. The Colorado Springs chronometer is 0.095 later than the Salt Lake chronometer on the Colorado Springs chronograph ; therefore the mean is , 18h 39m 78.626 . Final Results ...
... chronograph is , 18h 48m 528.048 . The same happens on August 2. The Colorado Springs chronometer is 0.095 later than the Salt Lake chronometer on the Colorado Springs chronograph ; therefore the mean is , 18h 39m 78.626 . Final Results ...
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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.