Ground plan of beds and veins of magnetic oxide of Iron: traversing the hypersthene and feldspathic rocks at Adirondack Essex County, New York, part of 104,000 acres belonging to the Adirondack Iron and Steel Company. Hand colored map includes names of lakes, rivers, ore beds; depicts elevated areas; and contains handwritten notations. Surveyor and scale indeterminable. Original map size 11 x 16 inches. Original map is held by the Dept. of Environmental Conservation.
New York State Archives, Dept. of Environmental Conservation, Verplanck Colvin maps of the Adirondack wilderness, B1405-96, SARA No. 310
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Environmental History Virtual Resource Collection