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USN 1147673 United States Naval Observatory

United States Naval Observatory
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Title: United States Naval Observatory
Caption: Washington, D.C., where the six-inch transit circle, seen in the dome, is a telescope of special design, restricted to motion in the north-south vertical plane and used to view an object only when it is near the meridian, 21 April 1971.
Description:
Catalog #: USN 1147673
Copyright Owner: National Archives
Original Creator: Photographer, Chief Photographer's Mate Thomas J. Mackesy
Original Date: Wed, Apr 21, 1971
After this Year: 1970
Before this Year: 1979
Original Medium: BW Photo
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