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Guillaume Rouelle, French Chemist

Guillaume Francois Rouelle (September 16, 1703 - August 3, 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 give it solid form (as a salt). He is known as l'Aine (the elder) to distinguish him from his younger brother, Hilaire Rouelle, who was also a chemist and known as the discoverer of urea. During 1742-68 he was a chemical demonstrator at the Jardin du Roi, Paris. He was an enthusiastic lecturer and taught most of the French chemists of the late 18th century; Denis Diderot, Antoine-Laurent de Lavoisier, Joseph Proust and Antoine-Augustin Parmentier. Rouelle believed in Stahl's incorrect phlogiston theory of combustion. Phlogiston was a flammable component of materials which was supposedly given off when they burned. This theory was disproved by Lavoisier. Rouelle was elected a foreign member of the Royal Swedish Academy of Sciences in 1749. He died.
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Title:
Guillaume Rouelle, French Chemist
Caption:
Guillaume Francois Rouelle (September 16, 1703 - August 3, 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 give it solid form (as a salt). He is known as l'Aine (the elder) to distinguish him from his younger brother, Hilaire Rouelle, who was also a chemist and known as the discoverer of urea. During 1742-68 he was a chemical demonstrator at the Jardin du Roi, Paris. He was an enthusiastic lecturer and taught most of the French chemists of the late 18th century; Denis Diderot, Antoine-Laurent de Lavoisier, Joseph Proust and Antoine-Augustin Parmentier. Rouelle believed in Stahl's incorrect phlogiston theory of combustion. Phlogiston was a flammable component of materials which was supposedly given off when they burned. This theory was disproved by Lavoisier. Rouelle was elected a foreign member of the Royal Swedish Academy of Sciences in 1749. He died
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Image size:
3223 x 4350 px | 40.1 MB
Print size:
27.3 x 36.8 cm | 10.7 x 14.5 in (300 dpi)
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