Deaths on January 15

John Landen, English mathematician and theorist (b. 1719)

John Landen (23 January 1719 – 15 January 1790) was an English mathematician.

8 Jan

State of the Union address
George Washington delivers the first State of the Union address in New York City.
11 Feb

Abolitionism in the United States
The Religious Society of Friends, also known as Quakers, petitions U.S. Congress for the abolition of slavery.
29 May

Thirteen Colonies
Rhode Island becomes the last of the original United States' colonies to ratify the Constitution and is admitted as the 13th U.S. state.
31 Jul

Potash
The first U.S. patent is issued, to inventor Samuel Hopkins for a potash process.
22 Oct

Little Turtle
Warriors of the Miami people under Chief Little Turtle defeat United States troops under General Josiah Harmar at the site of present-day Fort Wayne, Indiana, in the Northwest Indian War.