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Challenger

(Encyclopedia)Challenger, U.S. space shuttle. It exploded (Jan. 28, 1986) 73 seconds into its tenth flight, killing all seven crew members, including the first civilian in space, schoolteacher Christa McAuliffe. Th...

fire clay

(Encyclopedia)fire clay, clay that has a high degree of resistance to heat. By the best standards it should have a fusion point higher than 1,600℃. The term “fire clay” is commonly held to exclude kaolin and ...

Harrow, borough, Greater London, England

(Encyclopedia)Harrow, outer borough of Greater London, SE England. For centuries Harrow grew foodstuffs for London. It is mainly residential and contains parts of the...

fluorite

(Encyclopedia)fluorite flo͞oˈərspär [key], mineral appearing in various colors, e.g., green, yellow-brown, rose, and red. Chemically, it is calcium fluoride, CaF2. Its crystals, commonly cubic, are transparent ...

Meuse, department, France

(Encyclopedia)Meuse möz [key], department (1990 pop. 196,344), NE France, in Lorraine, bordering on Belgium. Bar-le-Duc, the capital, and Verdun are the chief towns. Its industries include the manufacture of metal...

Asheville

(Encyclopedia)Asheville ăshˈvəl, –vĭl [key], city (2020 pop. 94,589), seat of Buncombe co., W N.C., on the French Broad and Swannanoa rivers and on a plateau in the Blue Ridge Mts...

Minden, city, Germany

(Encyclopedia)Minden mĭnˈdən [key], city (1994 pop. 80,423), North Rhine–Westphalia, NW Germany, a port on the Weser River and the Midland Canal. It is an industrial center and rail junction. Manufactures incl...

match

(Encyclopedia)match, small stick whose chemically coated tip bursts into flame when struck on a rough surface. Before the introduction of the match, fire was made by friction methods using the stick and the groove,...

Linz

(Encyclopedia)Linz lĭnts [key], city (1991 pop. 203,044), capital of Upper Austria, NW Austria, a major port on the Danube River. It is a commercial and industrial center and a rail junction. Manufactures include ...

Pereira, I. Rice

(Encyclopedia)Pereira, I. Rice (Irene Rice Pereira) pərāˈrə [key], 1907–71, American painter, b. Chelsea, Mass. In 1935, Pereira helped found the Federal Art Project design laboratory and taught there for sev...