pl23_cgs02198.jpg
![Horizontal intensity variometers cgs02198.jpg Horizontal intensity variometers](https://s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_cgs02198.jpg)
Image
Download ( 5.59 MB )Permalink
https://www.noaa.gov/media/digital-library-photo/pl23cgs02198jpgDescription
Horizontal intensity variometers.
Collection
Historic Coast & Geodetic Survey
Keywords
Coast and Geodetic Survey
Geophysics Geomagnetism