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pl23_theb1144.jpg

Duplex measures, carrying the rear bar ahead

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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