Guillaume Francois Ruelle (1703-70) French chemist, Lavoisier's teacher. Professor (Demonstrateur) at the Jardin du Roi. Did much to popularise chemistry. Engraving published Paris 1874

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Photo credit: © Photo12/Ann Ronan Picture Library / Alamy / Afripics
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Keywords: 19th, century, experiment, france, man, portrait, science, scientist, test, tube