Observing from level mounted on velocipede.
Level center-mounted on velocipede.
Crossing trestle on Southern Pacific Railroad.
Level party of C. A. Egner
Image ID: theb1768, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Photo Date: 1920
Credit: C&GS Season's Report Egner 1920
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April 30, 2013