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pl23_cgs02180.jpg

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https://www.noaa.gov/media/digital-library-photo/pl23cgs02180jpg

Description

A magnetic instrument.The Coast and Geodetic Survey was the Nation's primary geophysical agency untilthe early 1970's when its geomagnetic duties were transferred to the USGS.

Display Date

1957 ca.

Collection

Historic Coast & Geodetic Survey

Keywords

Coast and Geodetic Survey

Geophysics Geomagnetism