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Mackenzie

(Encyclopedia)Mackenzie, river, c.1,120 mi (1,800 km) long, issuing from Great Slave Lake, Northwest Territories, Canada, and flowing generally NW to the Arctic Ocean through a great delta. Between Great Slave Lake...

Scudder, Samuel Hubbard

(Encyclopedia)Scudder, Samuel Hubbard, 1837–1911, American entomologist, b. Boston, grad. Williams (B.A., 1857) and Harvard (B.S., 1862). The founder of American insect paleontology and an authority on Orthoptera...

Saied, Kais

(Encyclopedia)Saied, Kais, 1958–, Tunisian law professor, president of Tunisia (2019–). An authority on constitutional law, he was a professor at the Univ. of Tunis (1999–2018) and has served as secretary gen...

Bédier, Joseph

(Encyclopedia)Bédier, Joseph zhôzĕfˈ bādyāˈ [key], 1864–1938, French authority on medieval literature. He was professor at the Collège de France and a member of the French Academy. His reconstruction, in ...

Tizard, Sir Henry Thomas

(Encyclopedia)Tizard, Sir Henry Thomas, 1885–1959, English physical chemist and scientific adviser. He was educated at Westminster school and Magdalen College, Oxford, from which he received honors in natural sci...

Alexander of Hales

(Encyclopedia)Alexander of Hales, d. 1245, English scholastic philosopher, called the Unanswerable Doctor by his fellow scholastics. He was a Franciscan and a lecturer at the Univ. of Paris. His Summa universae the...

Abel, Sir Frederick Augustus

(Encyclopedia)Abel, Sir Frederick Augustus, 1826–1902, English chemist, an authority on explosives. He was professor of chemistry at the Royal Military Academy (1851–55) and chemist to the War Dept. and governm...

Chladni, Ernst Florens Friedrich

(Encyclopedia)Chladni, Ernst Florens Friedrich ĕrnst flōˈrĕns frēˈdrĭkh klädˈnē [key], 1756–1827, German physicist. An authority on acoustics, he made studies of the transmission of sound in various gas...

Nyusi, Filipe Jacinto

(Encyclopedia)Nyusi, Filipe Jacinto, 1959–, Mozambican political leader. An engineer by training, he worked as a manager for Mozambique's ports and railways authority before entering politics as a member of Freli...

Mechichi, Hichem

(Encyclopedia)Mechichi, Hichem, 1974–, Tunisian political leader. A lawyer by training, he served on the National Commission to Investigate Embezzlement and Corruption and with the National Anti-Corruption Author...