Wednesday, April 9, 2008

Today in History: April 9

  • 1770 German physicist Thomas Seebeck born; discovered the Seebeck effect (inverse of the Peltier effect) where for a circular metal loop, half of one metal and half of another, if you keep one bimetallic join cooler than the other, electricity flows in the loop; AKA the thermocouple effect.
  • 1794 Bavarian musician Theobald Boehm born; invents the modern flute fingering mechanism.
  • 1869 French mathematician √Člie Cartan born; introduced modern differential forms, wedge products and the exterior derivative; invented spinor theory used in quantum mechanics.
  • 1919 American engineer Presper Eckert born; coinventor (with John Mauchly) of the first general-purpose electronic computer, ENIAC.
  • 1928 American songwriter Tom Lehrer born; wrote "Be Prepared", "Lobachevsky", "Poisoning Pigeons in the Park", "The Elements", "The Masochism Tango", "Rickety Tickety Tin".
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