Misc: what computer device has a number ranging from 300 to 19,200??

Questions

Dr C. Long first used ether as an anesthetic during a minor operation.?

Vincent Van Gogh, artist who always lent an ear, born.?

Hyman L. Lipman of Philadelphia patented a pencil with an attached eraser.?

U.S. 15th Amendment passes, guarantees right to vote regardless of race.?

Frankie Laine, singer, born.?