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pl23_cgs02250.jpg

The geomagnetic observatory at Camp Colonna on the Canada/U

Image

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Permalink

https://www.noaa.gov/media/digital-library-photo/pl23cgs02250jpg

Description

The geomagnetic observatory at Camp Colonna on the Canada/U.S. Boundary on the141st Meridian.

Display Date

1890

Collection

Historic Coast & Geodetic Survey

Keywords

Coast and Geodetic Survey

Geophysics Geomagnetism