■ On Oct. 9, 1936, the first generator at Boulder (later Hoover) Dam began transmitting electricity to Los Angeles.
■ In 1446, the Korean alphabet, created under the aegis of King Sejong, was first published.
■ In 1514, Mary Tudor, the 18-year-old sister of Henry VIII, became Queen consort of France upon her marriage to 52-year-old King Louis XII, who died less than three months later.
■ In 1776, a group of Spanish missionaries settled in present-day San Francisco.
■ In 1888, the public was first admitted to the Washington Monument.