Today is Saturday, August 22, the 234th day of 2015. There are 131 days left in the year.

On this date:

In 1787, inventor John Fitch demonstrated his steamboat on the Delaware River to delegates from the Constitutional Convention in Philadelphia.

In 1846, Gen. Stephen W. Kearny proclaimed all of New Mexico a territory of the United States.

In 1851, the schooner America outraced more than a dozen British vessels off the English coast to win a trophy that came to be known as the America’s Cup.

In 1914, Austria-Hungary declared war against Belgium.

In 1922, Irish revolutionary Michael Collins was shot to death, apparently by Irish Republican Army members opposed to the Anglo-Irish Treaty that Collins had cosigned.

In 1932, the British Broadcasting Corp. conducted its first experimental television broadcast, using a 30-line mechanical system.

In 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.