The Joseph Proust reference article from the English Wikipedia on 24-Jul-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Joseph Proust

Joseph Louis Proust, born September 26, 1754 in Angers in the Maine-et-Loire, departement of France - died July 5, 1826, was a chemist.

He first published his law of definite proportions (or Law of Constant Composition) in 1794.

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