Sketch showing the progress of the primary triangulation between the years 1872 and 1873 in the Adirondack Mountains. Map includes the watershed or divide of the Upper Hudson and St. Lawrence waters, and the divide between St. Lawrence, Hudson, and Mohawk waters. Map also shows county boundaries, mountains with elevations, and other water features. Color lithograph. Scale indeterminable. Original map size 23 x 34 inches. Original map held by Dept. of Environmental Conservation.
1872 – 1873
New York State Archives, Dept. of Environmental Conservation, Verplanck Colvin maps of the Adirondack wilderness, B1405-96, SARA No. 367
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Environmental History Virtual Resource Collection