Template:Selected anniversaries/December 21: Difference between revisions
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||1237: The city of Ryazan is sacked by the Mongol army of Batu Khan. | ||1237: The city of Ryazan is sacked by the Mongol army of Batu Khan. | ||
||1542: Thomas Allen born ... mathematician and astrologer. | ||1542: Thomas Allen born ... mathematician and astrologer. Highly reputed in his lifetime, he published little, but was an active private teacher of mathematics. Pic. | ||
||1673: Joan Blaeu dies ... cartographer born in Alkmaar, the son of cartographer Willem Blaeu. Pic. | ||1673: Joan Blaeu dies ... cartographer born in Alkmaar, the son of cartographer Willem Blaeu. Pic. | ||
||1732: Johann Christian Wiegleb born ... druggist and early innovator of chemistry as a science. | ||1732: Johann Christian Wiegleb born ... druggist and early innovator of chemistry as a science. Pic. | ||
||1754: Louis-Bertrand Castel, vociferous opponent of Newtonian science, gave a demonstration of his ocular harpsicord, which corresponded colors with the musical tones. *VFR The ocular harpsichord had sixty small coloured glass panes, each with a curtain that opened when a key was struck. A second, improved model of the harpsichord was demonstrated for a small audience in December of 1754. Pressing a key caused a small shaft to open, in turn allowing light to shine through a piece of stained glass. Castel thought of color-music as akin to the lost language of paradise, where all men spoke alike, and he claimed that thanks to his instrument’s capacity to paint sounds, even a deaf listener could enjoy music. Pic. | ||1754: Louis-Bertrand Castel, vociferous opponent of Newtonian science, gave a demonstration of his ocular harpsicord, which corresponded colors with the musical tones. *VFR The ocular harpsichord had sixty small coloured glass panes, each with a curtain that opened when a key was struck. A second, improved model of the harpsichord was demonstrated for a small audience in December of 1754. Pressing a key caused a small shaft to open, in turn allowing light to shine through a piece of stained glass. Castel thought of color-music as akin to the lost language of paradise, where all men spoke alike, and he claimed that thanks to his instrument’s capacity to paint sounds, even a deaf listener could enjoy music. Pic. | ||
Revision as of 06:12, 7 February 2019
1807: Mathematician Joseph Fourier announced to the French Academy of Science that an arbitrary function could be expanded as an infinite series of sines and cosines (now known as the Fourier series).
1878: Mathematician and philosopher Jan Łukasiewicz born. He will think innovatively about traditional propositional logic, the principle of non-contradiction and the law of excluded middle.
1913: Arthur Wynne's "word-cross", the first crossword puzzle, is published in the New York World.
1974: Fantasy Voronoi diagram upstages Fantasy Football.
1976: Chronography of 354 wins Pulitzer Prize.
1984: Mandelbrot set develops artificial intelligence, discovers new class of Gnomon algorithm functions.
2016: Signed first edition of Traveller used in high-energy literature experiments develops artificial intelligence.