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Leveling operations Picture

Leveling operations

Leveling operations. Umbrella used to shade instrument from sun which causes derangement from level of the instrument.

Photo Date: 1940 circa

Author: Collection of Captain Marvin Paulson, U.S. Coast and Geodetic Survey (ret.)/ NOAA

License: Public Domain Mark 1.0 (Public domain)
640 x 424 36.67 KB
1280 x 848 138.38 KB
1801 x 1193 304.05 KB
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Added On
19th October 2015
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