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corrosion

(Encyclopedia)corrosion, atmospheric oxidation of metals (see oxidation and reduction). By far the most important form of corrosion is the rusting of iron. Rusting is essentially a process of oxidation in which iro...

Faraday, Michael

(Encyclopedia)Faraday, Michael fârˈədē, –dāˌ [key], 1791–1867, English scientist. The son of a blacksmith, he was apprenticed to a bookbinder at the age of 14. He had little formal education, but acquired...

Tucson

(Encyclopedia)Tucson to͞oˈsŏnˌ [key], city (1990 pop. 405,390), seat of Pima co., SE Ariz.; inc. 1877. Situated in a desert plain surrounded by mountains, Tucson is an important and growing transportation and t...

Bashkortostan

(Encyclopedia)Bashkortostan băshkĭrˈ [key], constituent republic, 55,444 sq mi (143,600 sq km), E European ...

rayon

(Encyclopedia)rayon, synthetic fibers made from cellulose or textiles woven from such fibers; more rayon is manufactured than any other synthetic fiber. The name was adopted (1924), in preference to “artificial s...

tin

(Encyclopedia)tin, metallic chemical element; symbol Sn [Lat. stannum]; at. no. 50; at. wt. 118.710; m.p. 231.9681℃; b.p. 2,270℃; sp. gr. 5.75 (gray), 7.3 (white); valence +2 or +4. Tin exhibits allotropy; abov...

Revere, Paul

(Encyclopedia)Revere, Paul, 1735–1818, American silversmith and political leader in the American Revolution, b. Boston. In his father's smithy he learned to work gold and silver, and he became a leading silversmi...

counterfeiting

(Encyclopedia)counterfeiting, manufacturing spurious coins, paper money, or evidences of governmental obligation (e.g., bonds) in the semblance of the true. There must be sufficient resemblance to the genuine artic...

etching

(Encyclopedia)etching, the art of engraving with acid on metal; also the print taken from the metal plate so engraved. In hard-ground etching the plate, usually of copper or zinc, is given a thin coating or ground ...

Hainan

(Encyclopedia)Hainan hīˈnänˈ [key], island and province, c.13,100 sq mi (33,940 sq km), China, in the S...