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Joseph Louis Proust - LoveToKnow 1911 |
 | | JOSEPH LOUIS PROUST (1754-1826), French chemist, was born on the 26th of September 1754 at Angers, where his father was an apothecary. |
 | | Proust, on the other hand, maintained that compounds always contain definite quantities of their constituent elements, and that in cases where two or more elements unite to form more than one compound, the proportions in which they are present vary per sallum, not gradually. |
 | | Proust also investigated the varieties of sugar that occur in sweet vegetable juices, distinguishing three kinds, and he showed that the sugar in grapes, of which he announced the existence to his classes at Madrid in 1799, is identical with that obtained from honey by the Russian chemist J. Lowitz (1757-1804). |
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