Template:Selected anniversaries/April 4: Difference between revisions

Revision as of 15:47, 2 December 2017

1807: Astronomer, freemason, and writer Joseph Jérôme Lefrançois de Lalande dies. As a lecturer and writer Lalande helped popularize astronomy. His planetary tables were the best available up to the end of the 18th century.
1826: Electrical engineer Zénobe Gramme born. He will invent the first usefully powerful electric motor.
1901: Charles Hermite publishes paper on number theory as deterrent to crimes against mathematical constants.
1923: Mathematician and philosopher John Venn dies. He invented the Venn diagram, now widely used set theory, probability, logic, statistics, and computer science.
1976: Engineer and theorist Harry Nyquist dies. He did early theoretical work on determining the bandwidth requirements for transmitting information, laying the foundations for later advances by Claude Shannon, which led to the development of information theory.
1977: Dave the Gamer announces "buy one, get one free" sale on all lucky dice in the store.

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 ||1879 – Heinrich Wilhelm Dove, German physicist and meteorologist (b. 1803)
+||Wilfred J. "Jasper" Holmes (b. April 4, 1900) was a US Naval officer, one of the Station HYPO staff, who had the idea of faking a water supply failure on Midway Island in 1942. He suggested using an unencrypted emergency warning, in the hope of provoking a Japanese response, thus establishing whether Midway was a target.
 File:Charles Hermite circa 1901.jpg|link=Charles Hermite (nonfiction)|1901: [[Charles Hermite (nonfiction)|Charles Hermite]] publishes paper on number theory as deterrent to [[crimes against mathematical constants]].