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Poncelet, Jean Victor

(Encyclopedia)Poncelet, Jean Victor zhäNˈ vēktôrˈ pôNslāˈ [key], 1788–1867, French mathematician and army engineer. He taught at the school of mechanics at Metz and at the Faculté des Sciences and the É...

Appian

(Encyclopedia)Appian ăpˈēən [key], fl. 2d cent., Roman historian. He was a Greek, born in Alexandria. He held various offices in Alexandria, was an advocate in Rome, and then imperial procurator in Egypt. His h...

Douglas, Archibald, 3d earl of Douglas

(Encyclopedia)Douglas, Archibald, 3d earl of Douglas, 1328?–1400?, Scottish nobleman; illegitimate son of Sir James de Douglas, lord of Douglas. In 1361 he became constable of Edinburgh and in 1364 and 1368 he wa...

Harleian Library

(Encyclopedia)Harleian Library härˈlēən, härlēˈ– [key], manuscript collection of more than 7,000 volumes and more than 14,000 original legal documents, formed by Robert Harley, 1st earl of Oxford, and his ...

K'ang-hsi

(Encyclopedia)K'ang-hsi käng shē [key], 1654–1722, 2d emperor of the Ch'ing dynasty of China (1661–1722). He extended Manchu control and promoted learning in the arts and sciences. K'ang-hsi conquered the feu...

Plumb, Sir John Harold

(Encyclopedia)Plumb, Sir John Harold, 1911–2001, British historian. Educated at the universities of Leicester (B.A., 1933) and Cambridge (Ph.D., 1936), he remained at Cambridge as a research fellow from 1938 and ...

Carpenter, Mary

(Encyclopedia)Carpenter, Mary, 1807–77, English educator. She devoted her life to the establishment of schools and institutions and the promotion of educational reforms. In 1835 she organized the Working and Visi...

Lávrion

(Encyclopedia)Lávrion lôrˈēəm [key], town (1991 pop. 8,846), E central Greece, in Attica; a port on the Aegean Sea. It is a mining, smelting, and shipping center for lead, manganese, and cadmium ores. Silver w...

Sesostris I

(Encyclopedia)Sesostris I sĭsŏsˈtrĭs [key], d. 1926 b.c., king of ancient Egypt, 2d ruler of the XII dynasty; son and successor of Amenemhet I. He was coregent with his father from 1980 b.c.; from 1971 to 1926 ...

Tatian

(Encyclopedia)Tatian tāˈshən [key], 2d cent., Christian apologist. Probably born in Syria, he was a pupil of Justin Martyr. After his master's death, he left Christianity, becoming an Encratitic Gnostic—i.e., ...