Today in History - 23 July

1972 1st Earth Resources Technology Satellite (ERTS) is launched

1947 1st (U.S. Navy) air squadron of jets, Quonset Point, Rhode Island

1937 Isolation of pituitary hormone announced (Yale University)

1904 Ice cream cone created by Charles E Menches during La Purchase Expo

1880 1st commercial hydroelectric power planet begins, Grand Rapids, Michigan

1877 1st U.S. municipal railroad, Cincinnati Southern, begins operations

1877 1st telephone and telegraph line in Hawaii completed

1852 1st interment in U.S. National Cemetery at Presidio

1827 1st U.S. swim school opens (Boston Mass)