Columbia Encyclopedia

(Encyclopedia) rectifier, component of an electric circuit used to change alternating current to direct current. Rectifiers are made in various forms, all operating on the principle that current passes through them ...

(Encyclopedia) Emanuel, Rahm Israel, 1959–, American politician, b. Chicago, grad. Sarah Lawrence College (B.A., 1981), Northwestern Univ. (M.A., 1985). A seasoned Democratic power broker and skilled dealmaker kno...

(Encyclopedia) Helvellyn hĕlvĕlˈĭn [key], mountain, 3,118 ft (950 m) high, in the Lake District, NW England, SE of Keswick. Near the summit is a memorial to Charles Gough, who died (1805) there of exposure. He w...

(Encyclopedia) White, John, fl. 1585–93, artist, cartographer, and Virginia pioneer, b. probably in England. In 1585 he was commissioned to go with the expedition to Roanoke Island to depict life in the New World....

(Encyclopedia) Schmoller, Gustav go͝osˈtäf shmôlˈər [key], 1838–1917, German economist. He was the leader of the younger school of German historical economists, who tried to interrelate economics with the ot...

(Encyclopedia) Edwards, Edward, 1812–86, English library pioneer. As assistant from 1839 in the British Museum, he helped Sir Anthony Panizzi draw up the rules for the catalog. Edwards collected library statistics...

(Encyclopedia) Leonard, Buck (Walter Fenner Leonard), 1907–1997, African-American baseball player, b. Rocky Mount, N.C. Beginning in 1933, he played semiprofessional ball with the Baltimore Stars and the Brooklyn ...

(Encyclopedia) Earn, Loch lŏkh ûrn [key], lake, 7 mi (11.2 km) long and 1 mi (1.6 km) wide, Perth and Kinross and Stirling, central Scotland. Ardvorlich House, on its shore, is the Darlinvarach of Sir Walter Scott...

(Encyclopedia) Anson, George Anson, Baron, 1697–1762, British admiral. In his famous voyage (1740–44) around the world, Anson, in spite of shipwrecks and scurvy, inflicted great damage on Spanish shipping and re...

(Encyclopedia) Berg, Paul, 1926–2023, American biologist, b. New York City, Ph.D. Western Reserve Univ., 1952. A professor at Washington Univ. at St. Louis and Stanf...