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![Magnetic instrumentation cgs02190.jpg Magnetic instrumentation](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_cgs02190.jpg?itok=1fKv9sVv)
Description
Magnetic instrumentation.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