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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...

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...

Strauss, Levi

(Encyclopedia)Strauss, Levi, 1829–1902, American merchant, b. Buttenheim, Germany, as Löb Strauss. He moved with his mother and sisters to New York City in 1847 to join his brothers' wholesale dry-goods company....

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...

van Dyke, Henry

(Encyclopedia)van Dyke, Henry, 1852–1933, American clergyman, educator, and author, b. Germantown, Pa., grad. Princeton, 1873, and Princeton Theological Seminary, 1874. He was pastor of the Brick Presbyterian Chu...

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...