Template:Selected anniversaries/July 30: Difference between revisions

Revision as of 18:15, 16 August 2018

1832: Chemist, physician, agronomist, industrialist, statesman, educator, and philanthropist Jean-Antoine-Claude Chaptal dies.
1841: Mathematician and astronomer George Biddell Airy measures mean density of the Earth using Gnomon algorithm technique. This data will later be adapted for use in detecting and preventing crimes against mathematical constants.
1864: American Civil War: Battle of the Crater: Union forces attempt to break Confederate lines at Petersburg, Virginia by exploding a large bomb under their trenches.
1972: "Hello World" computer program from 1974 proud to represent "Hello World" computer programs everywhere.
1974: Watergate scandal: U.S. President Richard Nixon releases subpoenaed White House recordings after being ordered to do so by the Supreme Court of the United States.

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 ||1511 – Giorgio Vasari, Italian painter, historian, and architect (d. 1574). Pic.
-||1641 – Regnier de Graaf, Dutch physician and anatomist (d. 1673). Pic.
+||1641: Reinier de Graaf dies ... physician who discovered the follicles of the ovary (known as Graafian follicles), in which the individual egg cells are formed (1672) and also published on male reproductive organs (1668). He was also important for his studies on pancreatic juice (1663) and on the reproductive organs of mammals. He is considered one of the creators of experimental physiology. He used a technique of injecting dye into organs in order to be able to observe them better. It was on this technique that a bitter priority dispute with Swammerdam developed. He wrote a brief tract on the use of the syringe in anatomy (1669). He died, perhaps by suicide, at only 32 years of age. Pic.
 ||1676 – Nathaniel Bacon issues the "Declaration of the People of Virginia", beginning Bacon's Rebellion against the rule of Governor William Berkeley. https://en.wikipedia.org/wiki/Nathaniel_Bacon_(Virginia_colonist_and_rebel)