Template:Selected anniversaries/December 24: Difference between revisions

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||1877: Robert Parker Parrott dies ... American soldier and inventor of military ordnance. Pic search.
||1877: Robert Parker Parrott dies ... American soldier and inventor of military ordnance. Pic search.


File:Thomas Edison.jpg|link=Thomas Edison (nonfiction)|1877: [[Thomas Edison (nonfiction)|Thomas Edison)]] files for a patent on the phonograph. The idea came to him while working on a telegraph transmitter, when he noticed that when the tape of the machine was played at high speed, it gave off a noise resembling spoken words. After experimenting with a needle attached to the diaphragm of a telephone receiver to prick paper tape to record a message, his idea evolved to using a stylus on a tinfoil cylinder.
File:Thomas Edison.jpg|link=Thomas Edison (nonfiction)|1877: [[Thomas Edison (nonfiction)|Thomas Edison]] files for a patent on the phonograph. The idea came to him while working on a telegraph transmitter, when he noticed that when the tape of the machine was played at high speed, it gave off a noise resembling spoken words. After experimenting with a needle attached to the diaphragm of a telephone receiver to prick paper tape to record a message, his idea evolved to using a stylus on a tinfoil cylinder.


File:Johann Benedict Listing.jpg|link=Johann Benedict Listing (nonfiction)|1882: Mathematician [[Johann Benedict Listing (nonfiction)|Johann Benedict Listing]] dies. He introduced the term "topology" in a famous article published in 1847, having already used the term in correspondence some years earlier.
File:Johann Benedict Listing.jpg|link=Johann Benedict Listing (nonfiction)|1882: Mathematician [[Johann Benedict Listing (nonfiction)|Johann Benedict Listing]] dies. He introduced the term "topology" in a famous article published in 1847, having already used the term in correspondence some years earlier.

Revision as of 05:57, 17 December 2020