Template:Selected anniversaries/July 31: Difference between revisions

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||781: The oldest recorded eruption of Mount Fuji.
||781: The oldest recorded eruption of Mount Fuji.


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||1945: Operation Sabre: was a Royal Navy military operation in World War Two which involved cutting the Japanese submarine communications cable linking Saigon and Singapore ... operating from an X-Craft midget submarine in the Saigon River. Pic (submarine in museum).
||1945: Operation Sabre: was a Royal Navy military operation in World War Two which involved cutting the Japanese submarine communications cable linking Saigon and Singapore ... operating from an X-Craft midget submarine in the Saigon River. Pic (submarine in museum).


||1953: Nikolay Dimitrievich Zelinsky dies ... chemist, academician of the Academy of Sciences of USSR (1929). Pic.
||1953: Nikolay Dimitrievich Zelinsky dies ... chemist, academician of the Academy of Sciences of USSR (1929). Pic. Zelinsky studied at the University of Odessa and at the universities of Leipzig and Göttingen in Germany. Zelinsky was one of the founders of theory on organic catalysis. He is the inventor of the first effective filtering activated charcoal gas mask in the world (1915).
 
Zelinsky studied at the University of Odessa and at the universities of Leipzig and Göttingen in Germany. Zelinsky was one of the founders of theory on organic catalysis. He is the inventor of the first effective filtering activated charcoal gas mask in the world (1915).


||1957: Quirino Majorana dies ... experimental physicist who investigated a wide range of phenomena  
||1957: Quirino Majorana dies ... experimental physicist who investigated a wide range of phenomena  
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||2016: Seymour Papert dies ... mathematician, computer scientist, and educator, who spent most of his career teaching and researching at MIT. He was one of the pioneers of artificial intelligence, and of the constructionist movement in education. He was a co-inventor of the Logo programming language. Pic.
||2016: Seymour Papert dies ... mathematician, computer scientist, and educator, who spent most of his career teaching and researching at MIT. He was one of the pioneers of artificial intelligence, and of the constructionist movement in education. He was a co-inventor of the Logo programming language. Pic.


File:Green Spiral 5.jpg|link=Green Spiral 5 (nonfiction)|2018: Chromatographic analysis of ''[[Green Spiral 5 (nonfiction)|Green Spiral 5]]'' reveals "at least three, possibly as many as five" previously unknown shades of [[Green (nonfiction)|green]]."
File:Green Spiral 5.jpg|link=Green Spiral 5 (nonfiction)|2018: Chromatographic analysis of ''[[Green Spiral 5 (nonfiction)|Green Spiral 5]]'' reveals "at least three, possibly as many as five" previously unknown hues of green."


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Revision as of 04:17, 31 July 2021

  • 1669: Isaac Newton becomes known. Lucasian professor Isaac Barrow sent John Collins a manuscript of Newton's De analysi and thereby Newton's anonymity began to dissolve. Although this manuscript was not published until 1704, it led to Newton's appointment as Lucasian professor on 29 October 1669.

    1669: Isaac Newton becomes known. Lucasian professor Isaac Barrow sent John Collins a manuscript of Newton's De analysi and thereby Newton's anonymity began to dissolve. Although this manuscript was not published until 1704, it led to Newton's appointment as Lucasian professor on 29 October 1669.

  • 1704: Mathematician and physicist Gabriel Cramer born. He will publish Cramer's rule, giving a general formula for the solution for any unknown in a linear equation system having a unique solution, in terms of determinants implied by the system.

    1704: Mathematician and physicist Gabriel Cramer born. He will publish Cramer's rule, giving a general formula for the solution for any unknown in a linear equation system having a unique solution, in terms of determinants implied by the system.

  • 1784: Philosopher, art critic, and writer Denis Diderot dies. He was a prominent figure during the Enlightenment, serving as co-founder, chief editor, and contributor to the Encyclopédie along with Jean le Rond d'Alembert.

    1784: Philosopher, art critic, and writer Denis Diderot dies. He was a prominent figure during the Enlightenment, serving as co-founder, chief editor, and contributor to the Encyclopédie along with Jean le Rond d'Alembert.

  • 1822: Chemist, physician, agronomist, industrialist, statesman, educator, and philanthropist Jean-Antoine-Claude Chaptal endows organization dedicated to detecting and preventing crimes against mathematical constants.

    1822: Chemist, physician, agronomist, industrialist, statesman, educator, and philanthropist Jean-Antoine-Claude Chaptal endows organization dedicated to detecting and preventing crimes against mathematical constants.

  • 1926: Philosopher, mathematician, and computer scientist Hilary Putnam born. He will argue for the reality of mathematical entities, later espousing the view that mathematics is not purely logical, but "quasi-empirical".

    1926: Philosopher, mathematician, and computer scientist Hilary Putnam born. He will argue for the reality of mathematical entities, later espousing the view that mathematics is not purely logical, but "quasi-empirical".

  • 2018: Chromatographic analysis of Green Spiral 5 reveals "at least three, possibly as many as five" previously unknown hues of green."

    2018: Chromatographic analysis of Green Spiral 5 reveals "at least three, possibly as many as five" previously unknown hues of green."

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