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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...

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...

Fay, Sidney Bradshaw

(Encyclopedia)Fay, Sidney Bradshaw, 1876–1967, American historian, b. Washington, D.C. Fay, professor of history at Dartmouth College (1902–14), Smith (1914–29), and Harvard (1929–46), earned his name as an...

Hilgard, Eugene Woldemar

(Encyclopedia)Hilgard, Eugene Woldemar hĭlˈgärd [key], 1833–1916, American agricultural chemist and geologist, Ph.D. Univ. of Heidelberg, 1853. Born in Germany, he was brought to the United States in 1836. An ...

Gautier, Émile Félix

(Encyclopedia)Gautier, Émile Félix āmēlˈ fālēksˈ gōtyāˈ [key], 1864–1940, French geographer, an authority on Algiers, the Sahara, and the French African possessions. He explored W Madagascar (1892–94...

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...

Martens, Feodor

(Encyclopedia)Martens, Feodor fyôˈdər märˈtyĭns [key], 1845–1909, Russian diplomat and authority on international law. He became an official in the foreign ministry in 1868 and was professor of internationa...