File:Astronomy. Determination of time, longitude, latitude, and azimuth (1913) (14781225972).jpg

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Identifier: astronomydetermi00usco (find matches)
Title: Astronomy. Determination of time, longitude, latitude, and azimuth
Year: 1913 (1910s)
Authors: U.S. Coast and Geodetic Survey Bowie, William
Subjects: Spherical astronomy
Publisher: Washington, U.S. Govt. print. off.
Contributing Library: Wellesley College Library
Digitizing Sponsor: Boston Library Consortium Member Libraries

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Text Appearing Before Image:
BROKEN TELESCOPE TRANSIT. No. 3.
Text Appearing After Image:
MERIDIAN TELESCOPE. DETERMINATION OF TIME. 9 DESCRIPTION OP THE HAND-DRIVEN TRANSIT MICROMETER, MADE FOR COAST AND GEODETIC SURVEY TRANSIT NO. 2. Before considering the details of this micrometer, three points were determined uponas being essential to insure accurate and decisive action, durability, and convenience in readingthe chronograph record made by it. First, it was decided that the mechanism of the slide carrying the wire should be of theform in which the screw is mounted in bearings at the extreme ends of the box or case holdingthe slide, the micrometer head being fast upon the end of the screw projecting from the box,because this insures greater stability under the side stress of the gears connecting the screwwith the handwheel shaft than the form usually employed in theodolite and ocular micrometers,in which the screw is fastened to the slide and therefore takes part of whatever play there maybe in the latter. Second, it was decided that the electric recording device of the

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https://www.flickr.com/photos/internetarchivebookimages/14781225972/

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Flickr tags
InfoField
  • bookid:astronomydetermi00usco
  • bookyear:1913
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:U_S__Coast_and_Geodetic_Survey
  • bookauthor:Bowie__William
  • booksubject:Spherical_astronomy
  • bookpublisher:Washington__U_S__Govt__print__off_
  • bookcontributor:Wellesley_College_Library
  • booksponsor:Boston_Library_Consortium_Member_Libraries
  • bookleafnumber:14
  • bookcollection:Wellesley_College_Library
  • bookcollection:blc
  • bookcollection:americana
Flickr posted date
InfoField
30 July 2014


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