Exhibit of magnetic instruments and operations.
Image ID: cgs00088, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Photo Date: 1920 ca.
Category: Geophysics Magnetics/
• High Resolution Photo Available
of the U.S. Department of Commerce, National Oceanic & Atmospheric
NOAA Central Library
| NOAA Disclaimer
July 7, 2015