Hypsometric sketch US.

Hypsometric sketch of the United States. The level curves of 400 and 800 feet of elevation constructed by A. Guyot. The level curves of 2000, 4000 and 8000 feet of elevation constructed by Chas. A. Schott, Asst., U.S. Coast Survey. (Julius Bien, Lith., 1874)

United States. Census Office

1874

1874

U.S.

1:10 400 000

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