Columbia Encyclopedia

(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...

(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...

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

(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...

(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...

(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...

(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...

(Encyclopedia) Cappadocia kăpədōˈshə [key], ancient region of Asia Minor, watered by the Halys River (the modern Kizil Irmak), in present E central Turkey. The name was applied at different times to territories...

(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...

(Encyclopedia)  CE5 Sikkim sĭkˈĭm [key], state (2001 provisional pop. 540,493), 2,745 sq mi (7,110 sq km), India. It is located in the E Himalayas and bordered by Nepal (W), by the Tibet region of China (N), by...