pl23_cgs06327.jpg

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Description

No. 28. Curves of Equal Annual Change of Magnetic Declination In theeastern part of the United States, for the period 1860 to 1870. + indicatesincreasing west declination. Oct. 1865. Annual Report 1865.

Credit

United States Coast Survey Annual Report 1865

Display Date

1865

Collection

Historic Coast & Geodetic Survey
Historic Maps
United States Coast Survey Annual Report

Keywords

Historical Cartography