pl23_theb1312.jpg
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https://www.noaa.gov/media/digital-library-photo/pl23theb1312jpgDescription
Brown Gravity Meter - a pendulum apparatus.
Credit
Geodetic Letter No. 3, p. 37 - NOAA Central Library
Display Date
Ca. 1935
Collection
Historic Coast & Geodetic Survey
Keywords
Geophysics
Gravity