Geomagnetism Honolulu
By Geomagnetism Program
1902 (approx.)
![Department of Interior U.G. Geological Survey Honolulu Magnetic Observatory EST. 1902 sign.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/honosignweb.jpg?itok=0lK2_YD7)
Detailed Description
Department of Interior U.G. Geological Survey Honolulu Magnetic Observatory EST. 1902 sign.
Sources/Usage
Public Domain.