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Description
Tape contact at middle 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. 15, Appendix No. 3, Report of Superintendent ... 1901, p. 260.Work done at night to reduce expansion and contraction of steel tape
Display Date
1901
Collection
Historic Coast & Geodetic Survey
Keywords
Geodesy
Base Line