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Thompson, William Boyce

(Encyclopedia)Thompson, William Boyce, 1869–1930, American financier, b. Virginia City, Mont. He operated silver and copper mines in Montana and Arizona before moving to New York City. He was (1914–19) a direct...

Río Tinto

(Encyclopedia)Río Tinto, Ríotinto mēˈnäs dā [key], town (1990 pop. 5,934), Huelva prov., SW Spain, in the Sierra Morena Mts., in Andalusia. It is the center of the Río Tinto mining region, named for the riv...

Rogers, Henry Huttleston

(Encyclopedia)Rogers, Henry Huttleston, 1840–1909, American financier, b. Fairhaven, Mass. After he moved (1860) to Pennsylvania, he entered the oil business, experimented in the refining of petroleum, and, in pa...

Copiapó

(Encyclopedia)Copiapó kōpyäpōˈ [key], city (1990 est. pop. 79,268), capital of Atacama region, N central Chile, on the Copiapó River. An industrial city at the southern edge of the Atacama Desert, Copiapó ha...

Falun

(Encyclopedia)Falun fäˈlŭnˌ [key], city, capital of Kopparberg co., S central Sweden; chartered 1624 an...

amalgam

(Encyclopedia)amalgam əmălˈgəm [key], alloy containing mercury. The alloy may be liquid or solid, depending on the proportion of mercury, although all naturally occurring amalgams, i.e., those of gold and silve...

ormolu

(Encyclopedia)ormolu ôrˈməlo͞o [key], finish used on metal to imitate gold. It is employed chiefly for furniture mountings. The term originally applied to a coating of ground gold and was extended to alloys of ...

oxidases

(Encyclopedia)oxidases, in biochemistry, enzymes that catalyze reactions that directly involve molecular oxygen (see oxidation and reduction). Some utilize flavin coenzymes derived from riboflavin (see vitamin B2)....

Ibaraki

(Encyclopedia)Ibaraki ēbäˈräkē [key], prefecture, 2,352 sq mi (6,092 sq km), central Honshu, Japan. ...

brazing

(Encyclopedia)brazing, method of joining metal parts using nonferrous filler metals with high melting points such as copper, silver, and aluminum alloys. Brazing differs from soldering (see solder) by using a highe...