Source document for maps showing various magnetic elements obtained by W.H.
Emory on the Mexican Boundary Survey and the Coast Survey on the West
Coast. See image cgs00734.
Image ID: cgs00731, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Photo Date: 1855
Credit: NOAA Central Library Historical Imagery
• High Resolution Photo Available
of the U.S. Department of Commerce, National Oceanic & Atmospheric
NOAA Central Library
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July 7, 2015