Bulletin of Clarkson College of Technology; The Thomas S. Clarkson Memorial ... Volume 9-10

Bulletin of Clarkson College of Technology; The Thomas S. Clarkson Memorial ... Volume 9-10

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 edition. Excerpt: ..."C available for sextant work I do not think a location could be in el'!'Y more than about ten feet. I have been in 'Omaha for a month and a half, having been greatly delayed in getting here, due to the delay in the passing of the Sunday civil appropriation bill. This workhere is Telegraphic Longitude. "It consists in getting the chronometer e-rror from the stars at-Omaha, which we use as a base station, and another observer doing the same at the new station. Then we compare ch-ronometer-times over the wire, a through wire being obtained from-the Western Union for a ce-rtain time at night. We have completed the determination of differences in longitude between Omaha and stations in Montana, North and South Dakota and shall continue on stations in Colorado and Wyoming.. As a rule we observe twenty-four stars in two sets, getting two times and thus giving the chronometer rate, which-though small is absolutely necessary. Three or four nights give a sufficient determination.-By sending signals in both directions we eliminate the time lost in going ov-er the wire. For our stations so far the-probable error of the mean results have been about 0.01 seconds of-time. This-means about fifteen vfeet in distance. Bad weather has made-the work take twice as long as necessary and has given me considerable spare time to see the city, take in football games, etc. A little triangulation was necessa-ry to tie in the longitude station here as there is a possibi'lity of the station. being lost on account of the regrading of the land. The western sta-tions are all connected by supplementa-ry triangulation with the main primary triangulation which begins at the Mexican border line on the 98th meridian and-runs to the Canadian border line at...show more

Product details

  • Paperback | 94 pages
  • 189 x 246 x 5mm | 181g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236935217
  • 9781236935212