pl23_cgs06128.jpg
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https://www.noaa.gov/media/digital-library-photo/pl23cgs06128jpg-0Description
Annual Report 1859. No. 38 Lines of Equal Magnetic Variation For the Year 1858Projected on a Polyconic Development of the Sphere
Credit
United States Coast Survey Annual Report 1859
Display Date
1859
Collection
Historic Coast & Geodetic Survey
Historic Maps
United States Coast Survey Annual Report
Keywords
Historical Cartography