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Description
Duplex measures, carrying the rear bar ahead.After making contact, the rear bar was moved to the forward position.It was then realigned horizontally, vertically, and for azimuth on the base line. Fig. No. 9, Appendix No. 3, Report of Superintendent ... 1901, p. 244
Display Date
1901
Collection
Historic Coast & Geodetic Survey
Keywords
Geodesy
Base Line