Vic Smith and Dube Erickson at triangulation station along the 46th Parallel. The instrument was an old style theodolite that had to be physically lifted off its support to reverse it.

Image ID: cgs00211, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Location: Montana, 46th Parallel Survey
Photo Date: 1934 July
Photographer: Mr. Floyd Risvold, USC&GS


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