"Geological Map of the United States compiled by C.H. Hitchcock and W. P. Blake…", Hitchcock, Charles Henry
Subject: United States
Period: 1874 (dated)
Color: Printed Color
28 x 19.7 inches
71.1 x 50 cm
A large and colorful map that was completely redrawn from the previous edition that included information identifying railroads, roads, canals, army arsenals and forts. This new edition eliminates much of this information and instead focuses on the geology. A table at lower left provides an explanatory key to the colors used to indicate nine distinct geological formations. The carefully drawn map shows good geographical detail as well as the remarkable geological information. Lithographed by Julius Bien.
Small area of shadowy offsetting, else very good. Three small tears in lower blank margin not affecting map.