Digital collections
Description
Chronograph drum without paper.Used to record time ticks during longitude observations.Astro party of Charles Whitten (Image credit: C&GS; Season's Report Whitten 1935)
Credit
C&GS; Season's Report Whitten 1935
Display Date
1935
Location
Western United States
Category
Historic Coast & Geodetic Survey
Geodesy
Astronomic Latitude and Longitude
Keywords
Geodesy
Astro