Aligning iced-bar base apparatus with striding level.
Assuring iced-bar apparatus is horizontal.
Fig. No. 5, Appendix No. 3, Report of Superintendent ... 1901, p. 244.
Image ID: theb1139, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Photo Date: 1901
Category: Geodesy/Base Line/
• High Resolution Photo Available
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