pl23_theb1135.jpg
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https://www.noaa.gov/media/digital-library-photo/pl23theb1135jpgDescription
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
Display Date
1901
Collection
Historic Coast & Geodetic Survey
Keywords
Geodesy
Base Line