Stock Photo - Antoine Laurent Lavoisier, French chemist, demonstrating his discovery of oxygen, 1776 (1874). On the table in the right background of the picture is his calorimeter. Lavoisier (1743-1794) is regarded as the founder of the modern science of chemistry. From Vies des Savant Illustres du XVIIIe Siecle by Louis Figuier. (Paris, 1874).

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