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pyroxene

(Encyclopedia)pyroxene pīˈrŏksēn [key], name given to members of a group of widely distributed rock minerals called metasilicates in which magnesium, iron, and calcium, often with aluminum, sodium, lithium, man...

quartzite

(Encyclopedia)quartzite, usually metamorphic rock composed of firmly cemented quartz grains. Most often it is white, light gray, yellowish, or light brown, but is sometimes colored blue, green, purple, or black by ...

Fuller, George

(Encyclopedia)Fuller, George, 1822–84, American portrait, figure, and landscape painter, b. Deerfield, Mass.; pupil of Henry K. Brown at Albany. He first practiced portraiture in Boston and later in New York City...

Jameson, John Franklin

(Encyclopedia)Jameson, John Franklin, 1859–1937, American historian, b. Somerville, Mass. After teaching at Johns Hopkins, Brown, and the Univ. of Chicago he was director (1905–28) of the department of historic...

Swann v. Charlotte-Mecklenburg County Board of Education

(Encyclopedia)Swann v. Charlotte-Mecklenburg County Board of Education, case decided in 1971 by the U.S. Supreme Court. The Court held that the constitutional mandate (see Brown v. Board of Education of Topeka, Kan...

Simmons, Ruth

(Encyclopedia)Simmons, Ruth, 1945–, American educator and college president, b. Grapeland, Tex., grad. Dillard Univ. (B.A., 1967) and Harvard (A.M., 1970; Ph.D., 1973). As a scholar she was primarily concerned wi...

Cantabrian Mountains

(Encyclopedia)Cantabrian Mountains kăntāˈbrēən [key], N Spain, extending c.300 mi (480 km) along the Bay of Biscay from the Pyrenees to Cape Finisterre. Torre de Cerredo (8,687 ft/2,648 m) in the Picos de Euro...

obsidian

(Encyclopedia)obsidian ŏbsĭdˈēən [key], a volcanic glass, homogeneous in texture and having a low water content, with a vitreous luster and a conchoidal fracture. The color is commonly black, but may be some s...

miniature pinscher

(Encyclopedia)miniature pinscher, breed of lively toy dog originating in Germany in the late 19th cent. It stands from 10 to 12 in. (25.4–30.5 cm) high at the shoulder and weighs from 8 to 10 lb (3.6–4.5 kg). I...

Sanborn, Franklin Benjamin

(Encyclopedia)Sanborn, Franklin Benjamin, 1831–1917, American journalist, author, and philanthropist, b. Hampton Falls, N.H., grad. Harvard, 1855. An active abolitionist, he was a friend and agent of John Brown, ...