Digital Library Search
![Calibrating magnetic instruments cgs02224.jpg Calibrating magnetic instruments](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_cgs02224.jpg?itok=mlV8-n4j)
Image
Download ( 4.86 MB )Permalink
https://www.noaa.gov/media/digital-library-photo/pl23cgs02224jpgDescription
Calibrating magnetic instruments
Collection
Historic Coast & Geodetic Survey
Keywords
Coast and Geodetic Survey
Geophysics Geomagnetism