Guillaume-François Rouelle
French chemist
Died when: 66 years 321 days (802 months)Star Sign: Virgo
Guillaume François Rouelle (French pronunciation: [ɡijom fʁɑ̃swa ʁwɛl], 15 September 1703 – 3 August 1770) was a French chemist and apothecary.
In 1754 he introduced the concept of a base into chemistry as a substance which reacts with an acid to form a salt).
He is known as l'Aîné (the elder) to distinguish him from his younger brother, Hilaire Rouelle, who was also a chemist and known as the discoverer of urea.
He started a public course in his laboratory in 1738 where he taught many students among whom were Denis Diderot, Antoine-Laurent de Lavoisier, Joseph Proust and Antoine-Augustin Parmentier.
He was elected a foreign member of the Royal Swedish Academy of Sciences in 1749.
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