1913

The "Mona Lisa" is returned to the Louvre
Federal Income Tax introduced in the US
The "Armory Show" introduces "modern art" to New York City
Willa Cather's Oh Pioneers!
Niels Bohr formulates the theory of atomic structure
Henry Ford pioneers assembly line techniques
1st artificial kidney
Geiger counter
Erector Sets introduced
General Electric markets electric toasters, irons, and ranges
Stravinsky's The Rite of Spring
The Foxtrot becomes the fashionable dance
Charlie Chaplin's movie debut
Richard M. Nixon, Danny Kaye, Lionel Hampton, Gerald Ford, Burt Lancaster, Albert Camus and Benjamin Britten born
Harriet Tubman and J. Pierpont Morgan die