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pyrotechnics
(Encyclopedia)pyrotechnics pīˌrōtĕkˈnĭks, pīˌrə– [key], technology of making and using fireworks. Gunpowder was used in fireworks by the Chinese as early as the 9th cent., and it was they who brought fir...fireworks
(Encyclopedia)fireworks: see pyrotechnics.ammonium nitrate
(Encyclopedia)ammonium nitrate, chemical compound, NH4NO3, that exists as colorless, rhombohedral crystals at room temperature but changes to monoclinic crystals when heated above 32℃. It is extremely soluble in ...Del Tredici, David
(Encyclopedia)Del Tredici, David dĕl trədēˈchē [key], 1937–, American composer, b. Cloverdale, Calif. Originally a pianist, he made his debut with the San Francisco Symphony at 16, and studied composition wi...Brooks, Garth
(Encyclopedia) Brooks, Garth , 1962- , American country singer/songwriter, b. Luba, OK, Oklahoma State Univ. (B.A., 1984). Brooks's mother was a country singer who pe...Saint Gall, canton, Switzerland
(Encyclopedia)Saint Gall sānt gôl, găl, gäl [key], Ger. Sankt Gallen, canton (1993 pop. 432,800), 777 sq mi (2,012 sq km), NE Switzerland. Bordering on Lake Constance in the north and on the Rhine River in the ...barium
(Encyclopedia)barium bârˈēəm [key] [Gr.,=heavy], metallic chemical element; symbol Ba; at. no. 56; at. wt. 137.327; m.p. 725℃; b.p. 1,640℃; sp. gr. 3.5 at 20℃; valence +2. Barium is a soft, silver-white, ...Hunan
(Encyclopedia)Hunan ho͞oˈnänˈ [key] [south of the lake], province, c.80,000 sq mi (207,254 sq km), S ce...strontium
(Encyclopedia)strontium strŏnˈshēəm [key] [from Strontian, a Scottish town], a metallic chemical element; symbol Sr; at. no. 38; at. wt. 87.62; m.p. 769℃; b.p. 1,384℃; sp. gr. 2.6 at 20℃; valence +2. Stro...arsenic
(Encyclopedia)arsenic ärˈsənĭk [key], a semimetallic chemical element; symbol As; at. no. 33; at. wt. 74.92160; m.p. 817℃ (at 28 atmospheres pressure); sublimation point 613℃; sp. gr. (stable form) 5.73; va...Browse by Subject
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