Template:Selected anniversaries/June 30: Difference between revisions
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||Jacques-Louis Soret (b. 30 June 1827) was a Swiss chemist who in 1878, along with Marc Delafontaine, first observed holmium spectroscopically. Soret was also responsible for correctly working out the chemical composition of ozone as being three oxygen atoms bound together. | ||Jacques-Louis Soret (b. 30 June 1827) was a Swiss chemist who in 1878, along with Marc Delafontaine, first observed holmium spectroscopically. Soret was also responsible for correctly working out the chemical composition of ozone as being three oxygen atoms bound together. | ||
||Karl Theodor Vahlen (b. 1869) was an Austrian-born mathematician who was an ardent supporter of the Nazi Party. He was a member of both the SA and SS. | |||
||Jean-Daniel Colladon (d. 30 June 1893) was a Swiss physicist. Light pipe. | ||Jean-Daniel Colladon (d. 30 June 1893) was a Swiss physicist. Light pipe. | ||
Revision as of 21:28, 26 November 2017
1660: Mathematician William Oughtred dies. He invented the slide rule in 1622.
1770: Astronomer Charles Messier is elected to the French Academy of Sciences.
1907: Spike in crimes against mathematical constants blamed on upcoming Tunguska event.
1908: The Tunguska event occurs in remote Siberia.
1956: The Tunguska Event Preservation Society launches fundraiser to simulate the 1927 Tunguska expedition.