Joseph Proust
French chemist · France · Scientists · Lived 1754 to 1826 · aged 71
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Something wrong?The chemist who proved that nature follows recipes: chemical compounds lock into fixed ratios, never fudging the proportions.
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Proust joseph
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Aérostat "La Marie-Antoinette" lancé à Versailles le 23 Juin 1784 par Jean-François Pilâtre de Rozier et Louis Joseph Proust. Pag. 62 - estampe - btv1b55001480v
David d'Angers - Proust
Expérience de l'Aérostat nommé la Mongolfière faite par Mr Pilatre du Rozier à Versailles le 23 juin1784. G.43180
Joseph Louis Proust. Stipple engraving by A. Tardieu after Albuerne Wellcome V0004799
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Portrait de Louis-Joseph Proust (1754-1826), chimiste, S447Awards
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Joseph Louis Proust was born in France on 26 September 1754. Working as a chemist through the turn of the 19th century, he arrived at a discovery that redrew the ground rules: in 1797 he announced the law of definite proportions, the principle that chemical compounds always combine in constant, unchanging ratios. It was a line in the sand against randomness, proof that matter obeyed strict mathematical order. He died on 5 July 1826, leaving chemistry with a law it still teaches in every first-year course.
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