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Mariotte, Edme

(Encyclopedia)Mariotte, Edme ĕdˈmə märyôtˈ [key], 1620?–1684, French physicist. His De la nature de l'air (1676) includes a statement of Boyle's law (see gas laws), which he discovered independently and whi...

Kanawha

(Encyclopedia)Kanawha kənôˈwə [key], principal river of W.Va., 97 mi (156 km) long, formed by the confluence of the New and Gauley rivers, S central W.Va., and flowing NW to the Ohio River at Point Pleasant; Ch...

Fredonia

(Encyclopedia)Fredonia frēdōˈnēə [key], village (2020 pop. 9,585), Chautauqua co., SW N.Y., near Lake Erie; ...

Findlay

(Encyclopedia)Findlay fĭnˈlē, fĭndˈlē [key], city (2020 pop. 40,313), seat of Hancock co., NW Ohio, on the ...

rotary engine

(Encyclopedia)rotary engine, internal-combustion engine whose cycle is similar to that of a piston engine, but which produces rotary motion directly without any conversion from reciprocating motion. A major problem...

carbon black

(Encyclopedia)carbon black, mixture of partially burned hydrocarbons. Carbon black is produced by partial combustion of natural gas. It is used as a black pigment for inks and paints, and is used in large amounts b...

bleaching powder

(Encyclopedia)bleaching powder, white or nearly white powder that is usually a mixture of calcium chloride hypochlorite, CaCl(OCl); calcium hypochlorite, Ca(OCl)2; and calcium chloride, CaCl2. Sometimes called chlo...

hydrogen

(Encyclopedia)hydrogen hīˈdrəjən [key] [Gr.,=water forming], gaseous chemical element; symbol H; at. no. 1; interval in which at. wt. ranges 1.00784–1.00811; m.p. −259.14℃; b.p. −252.87℃; density 0.08...

Kyzyl Kum

(Encyclopedia)Kyzyl Kum or Kizil Kum both: kəzŭlˈ ko͞om [key] [Turk.,=red sand], desert, c.115,000 sq mi (297,900 sq km), in Kazakhstan and Uzbekistan. This vast region SE of the Aral Sea between the Amu Darya ...

Laghouat

(Encyclopedia)Laghouat lägwätˈ [key], town (1998 pop. 96,342), N Algeria, an oasis on the north edge of the Sahara Desert. It is an important administrative and military center and marketplace and is known for r...