Template:Selected anniversaries/August 4: Difference between revisions

Revision as of 12:29, 29 November 2017

1805: Physicist, astronomer, and mathematician William Rowan Hamilton born. He will make important contributions to classical mechanics, optics, and algebra, inventing the quaternion.
1833: Physicist and mathematician André-Marie Ampère uses principles of electromagnetism, which he referred to as "electrodynamics", to detect and prevent crimes against mathematical constants.
1834: Mathematician and philosopher John Venn born. He will invent the Venn diagram, now widely used set theory, probability, logic, statistics, and computer science.
2016: The Shovel depicts The Custodian in the act of reversing contract violations by Egon Rhodomunde and Baron Zersetzung.
2017: Quaternion multiplication table sells for five hundred thousand dollars.

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 ||1926 – George Irving Bell, American physicist, biologist, and mountaineer (d. 2000)
+||Carl Auer von Welsbach (d. 4 August 1929) was an Austrian scientist and inventor, who had a talent not only for discovering advances, but also for turning them into commercially successful products. He is particularly well known for his work on rare-earth elements, which led to the development of the flint used in modern lighters, the gas mantle, which brought light to the streets of Europe in the late 19th century, and for the development of the metal-filament light bulb.
 ||Daniel Hale Williams (d. August 4, 1931) was an African American general surgeon, who in 1893 performed the second documented successful pericardium surgery to repair a wound in the United States of America. He also founded Provident Hospital---the first non-segregated hospital in the United States---in Chicago, Illinois.