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Tape contact at end of comparator

Tape contact at end of comparator. Basically calibrating steel tapes - first use of steel measuring tapes by C&GS. Nine bases being measured on 98th Meridian by base line party under A.L. Baldwin . Fig. No. 14, Appendix No. 3, Report of Superintendent ... 1901, p. 260

Photo Category: Geodesy - Base Line
Photo Date: 1901

Author: NOAA

License: Public Domain Mark 1.0 (Public domain)
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Added On
18th October 2015
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