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phlogiston theory

(Encyclopedia)phlogiston theory flōjĭsˈtŏn [key], hypothesis regarding combustion. The theory, advanced by J. J. Becher late in the 17th cent. and extended and popularized by G. E. Stahl, postulates that in all...

Silvestre de Sacy

(Encyclopedia)Silvestre de Sacy: see Sacy, Antoine Isaac, Baron Silvestre de. ...

Vernet

(Encyclopedia)Vernet vĕrnāˈ [key], French family of painters. Claude Joseph Vernet, 1714–89, marine painter, b. Avignon, studied with his father, Antoine Vernet, a decorative painter, and in Rome, where he acq...

Diefenbaker, John George

(Encyclopedia)Diefenbaker, John George dēˈfənbāˌkər [key], 1895–1979, Canadian political leader. Elected to Parliament (1940), he succeeded George Drew as leader of the Progressive Conservative party (1956)...

earth, in chemistry

(Encyclopedia)earth, in chemistry, metallic oxide not readily reducible by chemical means, e.g., alkaline earths, rare earths, and alumina. The name is also applied to certain absorbent clays, e.g., fuller's earth,...

Le Nain

(Encyclopedia)Le Nain lə năN [key], family of French painters consisting of three brothers: Antoine Le Nain, 1588?–1648, Louis Le Nain, 1593?–1648, and Mathieu Le Nain, 1607–77. They went to Paris from Laon...

Becquerel

(Encyclopedia)Becquerel bĕkərĕlˈ [key], family of French physicists. Antoine César Becquerel, 1788–1878, was a pioneer in electrochemical science. He was professor of physics at the Muséum d'Histoire nature...

Garnier-Pagès, Étienne Joseph Louis

(Encyclopedia)Garnier-Pagès, Étienne Joseph Louis ātyĕnˈ zhôzĕfˈ lwē gärnyāˈ-päzhĕsˈ [key], 1801–41, French politician; brother of Louis Antoine Garnier-Pagès. He was a leading figure in the oppos...

Cavendish, Henry

(Encyclopedia)Cavendish, Henry, 1731–1810, English physicist and chemist, b. Nice. He was the son of Lord Charles Cavendish and grandson of the 2d duke of Devonshire. He was a recluse, and most of his writings we...

Claude, Jean

(Encyclopedia)Claude, Jean klōd [key], 1619–87, French Protestant theologian. As Protestant pastor at Paris, Claude received considerable attention for his disagreements with the Roman Catholic apologist Jacque...