National Trade Union begins to organize.
Austin secures repeal of the ban on American immigration into Texas.
Antonio López de Santa Anna comes to power in Mexico.
Whig party organized.
First strike at the Lowell mills.
Antiabolitionist riots in New York and Philadelphia.
The Ursuline Convent in Charlestown, Massachusetts, is burned down by anti-Catholic nativists (August 11).
Cyrus McCormick patents the mechanical reaper.
George Bancroft publishes the first volume of his History of the United States.