Geodesy.
Subtitle: Latitude observations with photographic zenith tube at Gathersburg, Md.
Contributors: Ross, Frank Elmore, 1874-
Series: Its  Speical publication, no. 27; Special publication (U.S. Coast and Geodetic Survey) -- no. 27
Publisher: Govt. Print. Off.
Published: 1915
Place of publication: Washington
Subjects: Geodesy -- United States; Latitude variation; Telescope, Zenith
Other titles: Latitude observations with photographic zenith tube