File:Astronomy. Determination of time, longitude, latitude, and azimuth (1913) (14781574535).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:
ransit micrometer is a form of registering micrometer placed with its movable wire inthe focal plane of an astronomic transit and at right angles to the direction of motion of theimage of the star which is being observed at and near meridian transit. Certain contact pointson the micrometer head serve to make an electric circuit as they pass a fixed contact spring, thuscausing to be recorded upon the chronograph sheet each separate instant at which the microm-eter wire reaches a position corresponding to a contact. The transit micrometer in use on the transits of this Survey is hand driven and was designedby Mr. E. G. Fischer, Chief of the Instrument Division of the Survey, and made in thatdivision. Much of the following description is copied from pages 458-460 of Appendix No. 8,Eeport for 1904, entitled A test of the transit micrometer. The pages referred to were writtenby Mr. Fischer. 1 See Appendix No. 7, Report for 1879, for a Description of the Davidson Meridian Instrument. No. 1.
Text Appearing After Image:
LARGE PORTABLE TRANSIT (EQUIPPED WITH TRANSIT MICROMETER) No. 2.

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https://www.flickr.com/photos/internetarchivebookimages/14781574535/

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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:12
  • bookcollection:Wellesley_College_Library
  • bookcollection:blc
  • bookcollection:americana
Flickr posted date
InfoField
30 July 2014


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