Template:Selected anniversaries/September 21: Difference between revisions

Revision as of 14:48, 11 September 2018

1576: Gerolamo Cardano dies. He was one of the most influential mathematicians of the Renaissance.
1577: Mathematician, cosmographer, and crime-fighter Pedro Nunes publishes new class of Gnomon algorithm functions based on navigation and cartography to detect and prevent crimes against mathematical constants at sea.
1703: Mathematician and scientist Vincenzo Viviani dies. In 1660, Viviani and Giovanni Alfonso Borelli conducted an experiment to determine the speed of sound. Timing the difference between the seeing the flash and hearing the sound of a cannon shot at a distance, they calculated a value of 350 meters per second (m/s), considerably better than the previous value of 478 m/s obtained by Pierre Gassendi.
1781: Joseph-Louis Lagrange writes to d'Alembert: "It appears to me also that the mine [of mathematics] is already very deep and that unless one discovers new veins it will be necessary sooner or later to abandon it." This view is prevalent at the end of the eighteenth century.
1792: French Revolution: The National Convention declares France a republic and abolishes the absolute monarchy.
1853: Physicist and academic Heike Kamerlingh Onnes born. He will receive widespread recognition for his work, including the 1913 Nobel Prize in Physics for "his investigations on the properties of matter at low temperatures which led, inter alia, to the production of liquid helium".
1854: Signed first edition of Leonardo Draws Clock Head sells fifty thousand dollars.

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 |File:Giovanni Antonio Magini.jpg|link=Giovanni Antonio Magini (nonfiction)|1616: Mathematician, cartographer, and astronomer [[Giovanni Antonio Magini (nonfiction)|Giovanni Antonio Magini]] dies. He supported a geocentric system of the world, in preference to Copernicus's heliocentric system.
-File:Vincenzo Viviani.jpg|link=Vincenzo Viviani (nonfiction)|1703: Mathematician [[Vincenzo Viviani (nonfiction)|Vincenzo Viviani]] dies. In 1660, Viviani and Giovanni Alfonso Borelli conducted an experiment to determine the speed of sound. Timing the difference between the seeing the flash and hearing the sound of a cannon shot at a distance, they calculated a value of 350 meters per second (m/s), considerably better than the previous value of 478 m/s obtained by Pierre Gassendi.
+File:Vincenzo Viviani.jpg|link=Vincenzo Viviani (nonfiction)|1703: Mathematician and scientist [[Vincenzo Viviani (nonfiction)|Vincenzo Viviani]] dies. In 1660, Viviani and Giovanni Alfonso Borelli conducted an experiment to determine the speed of sound. Timing the difference between the seeing the flash and hearing the sound of a cannon shot at a distance, they calculated a value of 350 meters per second (m/s), considerably better than the previous value of 478 m/s obtained by Pierre Gassendi.
 ||1756: John Loudon McAdam born ... engineer.