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West Mifflin

(Encyclopedia)West Mifflin, borough (1990 pop. 23,644), Allegheny co., SW Pa., a suburb SE of Pittsburgh, on the Monongahela River. Transportation equipment, fabricated metal products, and asphalt are produced in W...

University City

(Encyclopedia)University City, city (1990 pop. 40,087), St. Louis co., E Mo.; inc. 1906. A residential suburb of St. Louis, the city has light manufacturing, including textiles and metal fabrication. Washington Uni...

Weatherford

(Encyclopedia)Weatherford, city (1990 pop. 14,804), seat of Parker co., N central Tex.; inc. 1856. It is in a fertile region that yields horticultural crops, peanuts, pecan, and peaches; cattle and horses are raise...

Lansing

(Encyclopedia)Lansing. 1 Village (1990 pop. 28,086), Cook co., NE Ill., a suburb of Chicago, near the Ind. line; inc. 1893. Among the city's industries are meatpacking, food processing, and the manufacture of metal...

firebrick

(Encyclopedia)firebrick, brick that can withstand high temperatures, used to line flues, stacks, furnaces, and fireplaces. In general, such bricks have high melting points that range from about 2,800℉ (1.540℃) ...

Henderson

(Encyclopedia)Henderson. 1 City (2020 pop. 27,801), seat of Henderson co., NW Ky., on the Ohio River, in an oil, coal, tobacco, corn, and livestock area; founded ...

oxide

(Encyclopedia)oxide, chemical compound containing oxygen and one other chemical element. Oxides are widely and abundantly distributed in nature. Water is the oxide of hydrogen. Silicon dioxide is the major componen...

vanadium

(Encyclopedia)vanadium vənāˈdēəm [key], metallic chemical element; symbol V; at. no. 23; at. wt. 50.9415; m.p. about 1,890℃; b.p. 3,380℃; sp. gr. about 6 at 20℃; valence +2, +3, +4, or +5. Vanadium is a ...

magnesium

(Encyclopedia)magnesium măgnēˈzēəm, –zhəm [key], metallic chemical element; symbol Mg; at. no. 12; at. wt. 24.3050; m.p. about 648.8℃; b.p. about 1,090℃; sp. gr. 1.738 at 20℃; valence +2. In 1808, Sir...

potassium

(Encyclopedia)potassium pətăsˈēəm [key], a metallic chemical element; symbol K [Lat. kalium=alkali]; at. no. 19; at. wt. 39.0983; m.p. 63.25℃; b.p. 760℃; sp. gr. .862 at 20℃; valence +1. Potassium is a s...