The following events occurred in April 1900:
April 23, 1900: King Chulalongkorn frees the serfs of Thailand
April 30, 1900: "Casey" Jones wrecks train, becomes immortalized in song
April 3, 1900: Admiral Dewey runs for president, says he is convinced that the job "is not a very difficult one"
A mercury-vapor lamp
The following events occurred in January 1900:
January 7, 1900: Tesla closes down his Colorado Springs laboratory
Senator Hoar
Colson
Roberts