U.S. Coast Survey A.D. Bache Supdt. Curves of Equal Annual Change of Magnetic Declination U.S. Coast Survey

YEAR PUBLISHED: 1865

U.S. Coast Survey A.D. Bache Supdt. Curves of Equal Annual Change of Magnetic Declination

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SKU: 1109

DESCRIPTION

A map showing the curves of equal annual change of magnetic declination.

IMPORTANT NOTE:

All of our United States Coast Survey (USCS), United States Coast & Geodetic Survey (USC&GS), and similar maps and charts have been professionally unfolded and flattened using humidity baths, semi-permeable membrane, and drying blotter techniques. Most others you typically see on eBay have not been, and worse, are quickly and crudely unfolded for the low-quality photos you see. Unfolding these maps in that way is damaging and weakens them. Please be aware.

FULL TITLE

U.S. Coast Survey A.D. Bache Supdt. Curves of Equal Annual Change of Magnetic Declination in the Eastern Part of the United States, for the period 1860 to 1870, Constructed by Chas. A. Schott Assist. U.S. Coast Survey, Oct. 1865

MAPMAKER/CARTOGRAPHER/AUTHOR

United States Coast Survey, A.D. Bache Superintendent

PUBLISHER

Washington: Government Printing Office, 1867

PUBLICATION

39th Congress, 1st Session, House of Representatives, Ex. Doc. No. 75

DIMENSIONS (Inches)

8.5 X 11

CONDITION

Very fine with overall toning, darkened fold lines, folded as issued, professionally flattened, see photos for details.