Description: Historical Map of the United States - Exploration and Settlement 1850-1890.

Credits: The University of Texas at Austin. From the National Atlas of the United States of America (1970). 

Related Maps:   USA - Exploration and Settlement (before 1675)   USA - Exploration and Settlement (1675-1800)   USA - Exploration and Settlement (1800-1820)  

                         USA - Exploration and Settlement (1820-1835)   USA - Exploration and Settlement (1835-1850)