Template:Selected anniversaries/April 21: Difference between revisions
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File:Hannibal Goodwin.jpg|link=Hannibal Goodwin (nonfiction)|1822: Priest and inventor [[Hannibal Goodwin (nonfiction)|Hannibal Goodwin]] born. He will invent and patent rolled celluloid photographic film. | File:Hannibal Goodwin.jpg|link=Hannibal Goodwin (nonfiction)|1822: Priest and inventor [[Hannibal Goodwin (nonfiction)|Hannibal Goodwin]] born. He will invent and patent rolled celluloid photographic film. | ||
File:Francis Galton 1850s.jpg|link=Francis Galton (nonfiction)| | File:Francis Galton 1850s.jpg|link=Francis Galton (nonfiction)|1823: Polymath and crime-fighter [[Francis Galton (nonfiction)|Francis Galton]] publishes new class of [[Gnomon algorithm functions]] based on psychometrics which predict and prevent [[crimes against mathematical constants]]. | ||
||Johann Friedrich Pfaff ( | File:Johann Friedrich Pfaff.jpg|link=Johann Friedrich Pfaff (nonfiction)|1825: Mathematician [[Johann Friedrich Pfaff (nonfiction)|Johann Friedrich Pfaff]] dies. He worked on partial differential equations of the first order Pfaffian systems, as they are now called, which became part of the theory of differential forms. | ||
||Samuel Slater (d. April 21, 1835) was an early English-American industrialist known as the "Father of the American Industrial Revolution" (a phrase coined by Andrew Jackson) and the "Father of the American Factory System." In the UK, he was called "Slater the Traitor" because he brought British textile technology to America, modifying it for United States use. | ||Samuel Slater (d. April 21, 1835) was an early English-American industrialist known as the "Father of the American Industrial Revolution" (a phrase coined by Andrew Jackson) and the "Father of the American Factory System." In the UK, he was called "Slater the Traitor" because he brought British textile technology to America, modifying it for United States use. | ||
Revision as of 13:01, 22 November 2017
1719: Painter, mathematician, astronomer, and architect Philippe de La Hire dies.
1774: Physicist, astronomer, and mathematician Jean-Baptiste Biot born. He will establish the reality of meteorites, make an early balloon flight, and study the polarization of light.
1793: American captain and mathematician Nathaniel Bowditch publishes new class of Gnomon algorithm functions which improved maritime navigation techniques.
1822: Priest and inventor Hannibal Goodwin born. He will invent and patent rolled celluloid photographic film.
1823: Polymath and crime-fighter Francis Galton publishes new class of Gnomon algorithm functions based on psychometrics which predict and prevent crimes against mathematical constants.
1825: Mathematician Johann Friedrich Pfaff dies. He worked on partial differential equations of the first order Pfaffian systems, as they are now called, which became part of the theory of differential forms.
1882: Physicist and academic Percy Williams Bridgman born. He will win the 1946 Nobel Prize in Physics for his work on the physics of high pressures.
1883: Twain reminisces about Mark Twain Interviews Wallace War-Heels, calls it "the interview of a lifetime, and a singular bauble in the treasure-chest of my heart."
1910: Writer, entrepreneur, publisher and lecturer Mark Twain dies.
1910: Mathematician Richard Courant demonostrates that the existence of a physical solution does not obviate proof of crimes against mathematical constants.