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![Coil assembly for automatic standard magnetic observatory cgs02206.jpg Coil assembly for automatic standard magnetic observatory](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_cgs02206.jpg?itok=TAbKvY50)
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https://www.noaa.gov/media/digital-library-photo/pl23cgs02206jpgDescription
Coil assembly for automatic standard magnetic observatory
Collection
Historic Coast & Geodetic Survey
Keywords
Coast and Geodetic Survey
Geophysics Geomagnetism