Official websites use .gov A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
History of the progress of population of the United States: from 1790 to 1870
History of the progress of population of the United States: from 1790 to 1870