Georg Ernst Stahl
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Georg Ernst Stahl (October 21, 1660 - May 24, 1734), was a German chemist and physician.
He was born at Anspach. Having graduated in medicine at the University of Jena in 1683, he became court physician to Duke Johann Ernst of Sachsen Weimar in 1687. From 1694 to 1716 he held the chair of medicine at Halle, and was then appointed physician to King Friedrich Wilhelm I of Prussia in Berlin. It was there that he died.
In chemistry he is chiefly remembered in connection with the obsolete phlogiston theory, the essentials of which, however, he owed to J.J. Becher. He also propounded a view of fermentation which in some respects resembles that supported by Justus von Liebig a century and half later. In medicine he professed an animistic system, in opposition to the materialism of Hermann Boerhaave and Friedrich Hoffmann.
The most important of his numerous writings are Zymotechnia fundamenlalis sive fermentalionis theoria generalis (1697), which contains the phlogistic hypothesis; Specimen Becherianum (1702); Experimenta, observationes, aniniadversiones ... chymicae et physicae (1731); Theoria medica vera (1707); Ars sanandi cum expectalione (1730).
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