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Julius Ludwig Weisbach (born 10 August 1806 in Mittelschmiedeberg (now Mildenau Municipality), Erzgebirge, died 24 February 1871, Freiberg) was a German mathematician and engineer. ==Life and work== Weisbach studied at the ''Bergakademie'' in Freiberg from 1822 - 1826. After that, he studied with Carl Friedrich Gauss in Göttingen and with Friedrich Mohs in Vienna. In 1831 he returned to Freiberg where he worked as mathematics teacher at the local Gymnasium. In 1833 he became teacher for Mathematics and the Theory of Mountain Machines at the Freiberg ''Bergakademie''. In 1836 he was promoted to Professor for applied mathematics, mechanics, theory of mountain machines and so-called ''Markscheidekunst''. Weisbach wrote an influential book for mechanical engineering students, called ''Lehrbuch der Ingenieur- und Maschinenmechanik'', which has been expanded and reprinted on numerous occasions between 1845 and 1863. He also refined the Darcy equation into the still widely used Darcy–Weisbach equation. In 1868 he was elected a foreign member of the Royal Swedish Academy of Sciences. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Julius Weisbach」の詳細全文を読む スポンサード リンク
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