pl23_cgs02197.jpg
![Observatory magnetometer Ruska type cgs02197.jpg Observatory magnetometer Ruska type](https://s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_cgs02197.jpg)
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https://www.noaa.gov/media/digital-library-photo/pl23cgs02197jpgDescription
Observatory magnetometer Ruska type
Collection
Historic Coast & Geodetic Survey
Keywords
Coast and Geodetic Survey
Geophysics Geomagnetism