2 blue base maps, Positions of Magnetic Stations & Routes of Leveling, 1893

Charts 6 & 7. Positions of Magnetic Stations and Routes of Geodetic Spirit Leveling. 1893.

Report of the Superintendent of the U. S. Coast and Geodetic Survey showing the progress of the work during the fiscal year ending with June 1893. Washington: Goverment Printing Office. 1894.

Not stated

~40.5 x 24.5

Good. Generally clean, cream color toning, lighly darker along folds, as is common. Separations along some folds were repaired/reinforced with acid free tape, map may have some openings at fold intersections, though mostly they have been reinforced. Pictures illustrate the condition of the map. Map is solid and stable, but should be handled with care. 

United States, base maps, U.S. Coast and Geodetic Survey, 1894