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![Duplex bars of Eimbeck base measuring instrument in contact theb1157.jpg Duplex bars of Eimbeck base measuring instrument in contact](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb1157.jpg?itok=TrEcyIup)
Description
Duplex bars of Eimbeck base measuring instrument in contact.Figure No. 4, Appendix No. 11.Part II, Report of the Superintendent ... 1897, p. 483. (Image credit: NOAA Central Library)
Credit
NOAA Central Library
Display Date
1897
Collection
Historic Coast & Geodetic Survey
Keywords
Geodesy
Base Line
Instruments