Template:Selected anniversaries/July 1: Difference between revisions
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||1874 – The Sholes and Glidden typewriter, the first commercially successful typewriter, goes on sale. | ||1874 – The Sholes and Glidden typewriter, the first commercially successful typewriter, goes on sale. | ||
||1881 – The world's first international telephone call is made between St. Stephen, New Brunswick, Canada, and Calais, Maine, United States. | ||1881: Henri Étienne Sainte-Claire Deville dies. | ||
||1881 – The world's first international telephone call is made between St. Stephen, New Brunswick, Canada, and Calais, Maine, United States. | |||
||1884 – Allan Pinkerton, Scottish-American detective and spy (b. 1819) | ||1884 – Allan Pinkerton, Scottish-American detective and spy (b. 1819) | ||
Revision as of 17:35, 14 July 2017
1819: Johann Georg Tralles discovers the Great Comet of 1819 (C/1819 N1). It was the first comet analyzed using polarimetry, by François Arago.
1888: Mathematician and physicist Johann Jakob Balmer develops a Gnomon algorithm function based on the visible spectral lines of the hydrogen atom which unexpectedly reveals imminent crimes against mathematical constants.
2001: Physicist and educator Nikolay Basov dies. He did fundamental work in the field of quantum electronics.
2017: The Custodian says he is "not planning on retiring any time soon."