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An attempt to replicate the experiment killed Georg Wilhelm Richmann in Saint Petersburg in August 1753; he was thought to be the victim of ball lightning. [4] Franklin himself is said to have conducted the experiment in June 1752, supposedly on the top of the spire on Christ Church in Philadelphia. However, the spire at Christ Church was not ...
Georg Wilhelm Richmann (Russian: Георг Вильгельм Рихман; 22 July [O.S. 11 July] 1711 – 6 August [O.S. 26 July] 1753) was a Russian physicist of Baltic German origin who did pioneering work on electricity, atmospheric electricity, and calorimetry. [1]
The experiment's purpose was to uncover then unknown facts about the nature of lightning and electricity. Reason A Bald Eagle swooned over the canvas, giving birth to an electric celebration of red white and blue, as Uncle Sam stuck his middle finger up at Zeus above, and Ben Franklin (surrounded by angels, because why not) tamed the Greek god ...
The kite experiment was repeated by Romas, who drew from a metallic string sparks 9 feet (2.7 m) long, and by Cavallo, who made many important observations on atmospheric electricity. Lemonnier (1752) also reproduced Franklin's experiment with an aerial, but substituted the ground wire with some dust particles (testing attraction).
Franklin's experiment, in its initial conception, depended on the completion of Christ Church in Philadelphia, whose steeples would be sufficiently high as to attract a lightning strike. Franklin then conceived of an alternative experiment that involved flying a kite during a thunderstorm with a metal key attached to the string. [3]
Richmann's law, [1] [2] sometimes referred to as Richmann's rule, [3] Richmann's mixing rule, [4] Richmann's rule of mixture [5] or Richmann's law of mixture, [6] is a physical law for calculating the mixing temperature when pooling multiple bodies. [5]
1745–46 – Ewald Georg von Kleist and Pieter van Musschenbroek: discovery of the Leyden jar; 1752 – Benjamin Franklin: kite experiment; 1760 – Joseph-Louis Lagrange: Lagrangian mechanics; 1782 – Antoine Lavoisier: conservation of mass; 1785 – Charles-Augustin de Coulomb: Coulomb's inverse-square law for electric charges confirmed [9]
The same decade, Romas conducted the kite experiment that Benjamin Franklin proposed in 1750 in a letter to Peter Collinson, but that had not yet reached France. Raising a wire-wrapped kite in a thunderstorm, Romas proved the electrical nature of lightning. During his experiment, he noticed ten feet long sparks and explosions.