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lamp

(Encyclopedia)lamp, originally a vessel for holding oil or some combustible substance that could be burned through a wick for illumination; the term has been extended to other lighting devices. Stones, shells, and ...

Field, Eugene

(Encyclopedia)Field, Eugene, 1850–95, American poet and journalist, b. St. Louis. After working on several Midwestern newspapers, in 1883 he became a columnist for the Chicago Daily News (later the Record). His u...

apatite

(Encyclopedia)apatite ăpˈətīt [key], mineral, a phosphate of calcium containing chlorine or fluorine, or both, that is transparent to opaque in shades of green, brown, yellow, white, red, and purple. Apatite is...

heartwood

(Encyclopedia)heartwood, the central, woody core of a tree, no longer serving for the conduction of water and dissolved minerals; heartwood is usually denser and darker in color than the outer sapwood. Before the s...

molybdenite

(Encyclopedia)molybdenite məlĭbˈdənīt, mō– [key], a mineral, molybdenum disulfide, MoS2, blue-gray in color, with a metallic luster and greasy feel. It occurs in crystals of the hexagonal system but more co...

Beke, Charles Tilstone

(Encyclopedia)Beke, Charles Tilstone bēk [key], 1800–1874, English explorer and author. In Ethiopia in 1840–43 he mapped c.70,000 sq mi (181,300 sq km) of the country, determined the approximate course of the ...

waltz

(Encyclopedia)waltz, romantic dance in moderate triple time. It evolved from the German Ländler and became popular in the 18th cent. The dance is smooth, graceful, and vital in performance. The waltz in Vicente Ma...

Whiteman, Paul

(Encyclopedia)Whiteman, Paul, 1891–1967, American conductor, b. Denver. Whiteman played viola in the Denver Symphony Orchestra and in 1915 joined the San Francisco Symphony. During World War I he was an army band...

Wad Madani

(Encyclopedia)Wad Madani wäd mädäˈnē [key], city (1993 pop. 211,362), SE cental Sudan, on the Blue Nile River. It is linked by rail with Khartoum and is the chief center of the Al Gezira agricultural region. C...

Bruce, James

(Encyclopedia)Bruce, James, 1730–94, Scottish explorer in Africa. He explored Roman ruins in N Africa (1755) from Tunis to Tripoli and visited Crete, Rhodes, and Asia Minor. In 1768 he traveled down the Red Sea a...