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
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| Added On | 18th October 2015 |
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