Coast Survey Chart Magnetic Declination of United States for year 1870 1865

Description

Coast Survey Chart Magnetic Declination of United States for year 1870 1865
A nice overview map showing the Magnetic Declination isogonic lines that will be used starting in 1870. 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. NOTE: eBay Buyer's Premium only charged on eBay.
Coast Survey Chart Magnetic Declination of United States for year 1870 1865
YEAR PUBLISHED:
1865
CARTOGRAPHER/MAPMAKER:
United States Coast Survey, A.D. Bache Superintendent
PUBLICATION:
39th Congress, 1st Session, House of Representatives, Ex. Doc. No. 75
PUBLISHER:
Washington: Government Printing Office, 1867
FULL TITLE:
U.S. Coast Survey A.D. Bache Supdt. Magnetic Declination (Variations of the Compass) Isogonic Lines for the year 1870
CONDITION:
Very fine with overall toning, darkened fold lines, folded as issued, professionally flattened, see photos for details.
DIMENSIONS:
21.75 X 17
DESCRIPTION:
A nice overview map showing the Magnetic Declination isogonic lines that will be uséd starting in 1870.
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.
NOTE: eBay Buyer's Premium only charged on eBay.
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