1757 - On-board the HMS Monarch, Admiral John Byng is executed by firing squad for neglecting his duty.
1794 - Eli Whitney is granted a patent for the cotton gin.
1964 - A jury in Dallas, Texas finds Jack Ruby guilty of killing John F. Kennedy assassin Lee Harvey Oswald.
1903 - Adolph Gottlieb American abstract expressionist painter (d. 1974)
1933 - Michael Caine, British actor
1883 - Karl Marx, German political theorist (b. 1818)
An interesting fact - March 14 is also known as Pi Day - the unofficial mathematics holiday.