Johann von Segner, Carpatho-German Scientist
Johann Andreas von Segner (October 9, 1704 - October 5, 1777) was a Hungarian-born Carpatho-German scientist. In 1729 he received a medical certificate and returned to Pressburg, where he started to work as a physician. In 1735 he became the first professor of mathematics, a position created for him, at the University of Gottingen. In 1755 he became a professor at Halle, where he established an observatory. He was the first scientist to use the reactive force of water and constructed the first water-jet, the Segner wheel, which resembles one type of modern lawn sprinkler. He, also produced the first proof of Descartes' rule of signs. Historians of science remember him as the father of the water turbine. One of the best-known scientists of his age, he was a member of the academies of Berlin, London, and Saint Petersburg. He died in 1777 a few days shy of his 73rd birthday.
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