pl23_theb1157.jpg
![Duplex bars of Eimbeck base measuring instrument in contact theb1157.jpg Duplex bars of Eimbeck base measuring instrument in contact](https://s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb1157.jpg)
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https://www.noaa.gov/media/digital-library-photo/pl23theb1157jpgDescription
Duplex bars of Eimbeck base measuring instrument in contact.Figure No. 4, Appendix No. 11.Part II, Report of the Superintendent ... 1897, p. 483.
Credit
NOAA Central Library
Display Date
1897
Collection
Historic Coast & Geodetic Survey
Keywords
Geodesy
Base Line
Instruments