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Anguilla
Anguilla , island and British dependency (2005 est. pop. 13,300) 35 sq mi (91 sq km), West Indies, northernmost of the Leeward Islands . The capital is the town of The Valley. The population, which is mainly of African descent, speaks English, the official language. Most Anguillans belong to Anglic...
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coal mining
coal mining physical extraction of coal resources to yield coal; also, the business of exploring for, developing, mining, and transporting coal in any form. Strip mining is the process in which the overburden (earth and rock material overlying the coal) is removed to expose a coal seam or coal bed....
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Croton Aqueduct
Croton Aqueduct , 38 mi (61 km) long, SE N.Y., carrying water from the Croton River basin to New York City; built 1837-42. It was one of the earliest modern aqueducts in the United States. Water impounded by New Croton Dam (completed 1905) is channeled S to the Bronx, for most of its length in a cov...
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Albert Pike
Albert Pike 1809-91, American lawyer, Confederate general in the Civil War, b. Boston. He settled (1832) in Arkansas, where he became a newspaper editor and a lawyer. He was a captain in the Mexican War. In the Civil War, Pike secured for the Confederacy the loyalty of the tribes in the Indian Ter...
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John William Heisman
John William Heisman , 1869-1936, American football coach, b. Cleveland. He studied and played football at Brown (1887-89) and the Univ. of Pennsylvania (1890-91). He coached football for 36 years from 1892-1927, most memorably at Auburn (1895-99), Georgia Tech (1904-19), and Rice (1924-27). At Geor...
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Carlo Rainaldi
Carlo Rainaldi , 1611-91, Italian architect of the high baroque. He followed in the steps of the great Roman masters of baroque building, Bernini, Borromini, and Cortona. Largely dependent upon them for his designs, Rainaldi developed a heavier and more austere style that was widely imitated. Most o...
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Johann Heinrich Merck
Johann Heinrich Merck , 1741-91, German critic. He was the counselor of many young writers, including Goethe, whose genius he was first to recognize.
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Elementary Particles
Elementary Particles
Elementary Particles
For each of these particles, except the photon, gluon, and Z-boson, there is an antiparticle with the same mass and opposite charge. In most cases the antiparticle is denoted by an overbar over the particle symbol (e.g., the symbol for the antiproton ...
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racquets
racquets game played by two or four persons on a court 60 by 30 ft (18.3 m by 9.1 m); it is surrounded by three walls 30 ft (9.1 m) high and a backwall 15 ft (4.6 m) high. The ball, 1 in. (2.54 cm) in diameter, is made of polyethylene with an adhesive tape cover. The gut-strung racket is 30 in. (76...
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Rudolf I
Rudolf I or Rudolf of Hapsburg , 1218-91, German king (1273-91), first king of the Hapsburg dynasty. Rudolf's election as king ended the interregnum (1250-73), during which time there was no accepted German king or Holy Roman emperor. The election was prompted by Pope Gregory X, who needed the...
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