Template:Selected anniversaries/March 30: Difference between revisions
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||1857 – Léon Charles Thévenin, French engineer (d. 1926) no pic | ||1857 – Léon Charles Thévenin, French engineer (d. 1926) no pic | ||
||Auguste Bravais (d. 30 March 1863) was a French physicist known for his work in crystallography, the conception of Bravais lattices, and the formulation of Bravais law. Pic. | |||
||1867 – Alaska is purchased from Russia for $7.2 million, about 2-cent/acre ($4.19/km²), by United States Secretary of State William H. Seward. | ||1867 – Alaska is purchased from Russia for $7.2 million, about 2-cent/acre ($4.19/km²), by United States Secretary of State William H. Seward. | ||
Revision as of 18:35, 7 February 2018
1599: Mathematician Adam Ries dies. He wrote textbooks for practical mathematics, promoting the advantages of Arabic/Indian numerals over Roman numerals.
1811: Chemist and academic Robert Bunsen born. He will investigate emission spectra of heated elements, and discover caesium (in 1860) and rubidium (in 1861) with the physicist Gustav Kirchhoff.
1886: Mathematician, philosopher, and logician Stanisław Leśniewski born. He will posit three nested formal systems, to which he will give the Greek-derived names of protothetic, ontology, and mereology.
1892: Mathematician and academic Stefan Banach born. He will be one of the founders of modern functional analysis.
1939: Hellscreiber teleprinter system used to publish new biography of mathematician Adam Ries.
1942: Der Reichsspritzenmeister develops new memory-wiping drug for Abomynous.
2015: Asclepius Myrmidon discovers unregistered halting problem, predicts new class of crimes against mathematical constants.