Map of the United States : exhibiting the grants of lands made by the General government to aid the construction of railroads and wagon roads / Dept. of the Interior. U.S. Geographical and Geological Survey of the Rocky Mountain Region J.W. Powell, in Cha1878"For explanation see chapter on "Land Grants in aid of Internal Improvements.""Julius Bien, Lithographer.""The base chart was engraved for the Statistical Atlas of the United States.""To accompany report on the lands of the arid region of the U.S."cartographic