1787: Inventor John Fitch demonstrated his steamboat on the Delaware River to delegates from the Constitutional Convention in Philadelphia.
1846: Gen. Stephen W. Kearny proclaimed all of New Mexico as a territory of the United States.
1956: President Dwight D. Eisenhower and Vice President Richard Nixon were nominated for second terms in office by the Republican national convention in San Francisco.
1983: Britton's Community Theater conducted auditions for its fall production, The Second Time Around.
1988: Two sets of South Dakota twins - Dennis and Duane Koslowski of Doland and Bill and Jim Scherr of Mobridge - were preparing to wrestle in the Summer Olympics in Seoul, South Korea.
Source: Dacotah Prairie Museum and The Associated Press