6. Population 1830.
Distribution of the population east of the 100th meridian: 1830. (Prepared under the supervision of Henry Gannett, Geographer of the Twelfth Census. United States Census Office, 1903). Julius Bien & Co., N.Y.
David RumseyGannett, Henry, 1846-1914; United States. Census Office
1903
1903
U.S. Census Office
1:16 500 000