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brasses, ornamental

(Encyclopedia)brasses, ornamental. Brass, a copper-zinc alloy produced since imperial Roman times, is closely associated in art with bronze, a copper-tin alloy (see bronze sculpture). Brass was generally fashioned ...

halogen

(Encyclopedia)halogen hălˈəjĕn [key] [Gr.,=salt-bearing], any of the chemically active elements found in Group 17 of the periodic table; the name applies especially to fluorine (symbol F), chlorine (Cl), bromin...

Cerro de Pasco

(Encyclopedia)Cerro de Pasco sĕrˈrō ᵺā päsˈkō [key], city, capital of Pasco dept., central...

Superior

(Encyclopedia)Superior, city (1990 pop. 27,134), seat of Douglas co., NW Wis., on Superior Bay of Lake Superior, at the mouths of the St. Louis and the Nemadji rivers; inc. 1883. It is a port of entry with many rai...

Sierra Morena

(Encyclopedia)Sierra Morena syāˈrä mōrāˈnä [key], mountain range, SW Spain, extending c.375 mi (600 km) eastward along the southern edge of the Meseta (central plateau) from the Portuguese border to the Sier...

Martin, Archer John Porter

(Encyclopedia)Martin, Archer John Porter, 1910–2002, English biochemist, educated at Cambridge. From 1938 to 1946 he carried on chemical research in the laboratories of the Wool Industries Association at Leeds, Y...

Helsingborg

(Encyclopedia)Helsingborg or Hälsingborg both: hĕlsĭngbôrˈyə [key], city, Malmöhus co., S Sweden...

Nogales

(Encyclopedia)Nogales nōgäˈlās [key], city (1990 pop. 19,489), Santa Cruz co., S Ariz. on the Mexican border with its adjacent city, Nogales (1990 pop. 105,873), Sonora, NW Mexico. There are copper, silver, and...

Tarsus

(Encyclopedia)Tarsus tärˈsəs, Turk. tärso͝osˈ [key], city (1990 pop. 191,333), S Turkey, in Cilicia, on the Tarsus (anc. Cydnus) River, near the Mediterranean Sea. It is an agricultural trade center; copper, ...

isomer

(Encyclopedia)isomer īˈsəmər [key], in chemistry, one of two or more compounds having the same molecular formula but different structures (arrangements of atoms in the molecule). Isomerism is the occurrence of ...