The very first U.S. patent is issued: to inventor Samuel Hopkins for a potash process. Potash, a crude potassium carbonate, useful in making soap and in the manufacture of glass, was made by leaching wood ashes and boiling down the lye. To produce a ton of potash, the trees on an acre of ground would be cut down and burned, the ashes leached, and the lye evaporated in great iron kettles.
The first Masonic Grand Lodge in the future United States is constituted in Massachusetts.
The International Atomic Energy Agency is established., it is an international organization that seeks to promote the peaceful use of nuclear energy, and to inhibit its use for any military purpose, including nuclear weapons.
The animated short A Wild Hare is released, introducing the character of Bugs Bunny. In this cartoon Mel Blanc first uses what would become Bugs’ standard voice; this cartoon also marks the first time that Bugs uses the catchphrase…..
Syncom 2, the world’s first geosynchronous satellite, is launched from Cape Canaveral.
The first commercial use of an electric telegraph is successfully demonstrated by William Cooke and Charles Wheatstone on 25 July 1837 between Euston and Camden Town in London. (it did not support punctuation, lower case, or the letters J, Q, and Z)
Antoine Laumet de La Mothe, sieur de Cadillac establishes a trading post at Fort Pontchartrain du Détroit, which later becomes the city of Detroit, Michigan. William H. Murphy and Henry M. Leland, founders of the Cadillac auto company, paid homage to him by using his name for their company and his armorial bearings as its logo in 1902.
Fox Film Corporation buys the patent for the Movietone sound system , a method of recording sound for motion pictures that guarantees synchronization between sound and picture.
And for a bit of local history: Movietone was perfected by Theodore Case and his assistant, Earl I. Sponable, in 1925 at the Case Research Lab in Auburn, New York, with their creation of what became the Movietone camera, built for the laboratory by the Wall machine shop in Syracuse, New York from a Bell & Howell camera.
Dezik (Дезик) and Tsygan (Цыган, “Gypsy”) are the first dogs to make a sub-orbital flight.