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Description
Annual Report 1861. No. 30 Lines of Equal Magnetic Declination on the Gulf ofMexico for the Epoch 1860. Lines of Equal Magnetic Declination on the AtlanticCoast Virginia to Florida for the Epoch 1860. (Image credit: United States Coast Survey Annual Report 1861)
Credit
United States Coast Survey Annual Report 1861
Display Date
1861
Collection
Historic Coast & Geodetic Survey
Historic Maps
United States Coast Survey Annual Report
Keywords
Historical Cartography