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barograph

(Encyclopedia)barograph, instrument used to make a continuous recording of atmospheric pressure. The pressure-sensitive element, a partially evacuated metal cylinder, is linked to a pen arm in such a way that the v...

Sliven

(Encyclopedia)Sliven slēˈvĕn [key], city (1993 pop. 106,958), E central Bulgaria, at the foot of the Balkan Mts. A textile center, it also produces carpets, wood and metal products, foodstuffs, and wine. Sliven ...

europium

(Encyclopedia)europium yo͝orōˈpēəm [key] [from Europe], metallic chemical element; symbol Eu; at. no. 63; at. wt. 151.964; m.p. about 820℃; b.p. about 1,600℃; sp. gr. 5.25 at 25℃; valence +2 or +3. Europ...

engraving

(Encyclopedia)engraving, in its broadest sense, the art of cutting lines in metal, wood, or other material either for decoration or for reproduction through printing. In its narrowest sense, it is an intaglio print...

harness

(Encyclopedia)harness, comprehensive term for the gear of a draft animal, excluding the yoke, by which it is attached to the load that it pulls. Although harnesses are used on dogs (for drawing travois and dogsleds...

osmium

(Encyclopedia)osmium ŏzˈmēəm [key], metallic chemical element; symbol Os; at. no. 76; at. wt. 190.23; m.p. 3,045±30℃; b.p. 5,027±100℃; sp. gr. 22.57 at 20℃; valence usually +0 to +8. Osmium is a very ha...

Peoria

(Encyclopedia)Peoria pēôrˈēə [key]. 1 City (1990 pop. 50,618), Maricopa co., central Ariz., a suburb of Phoenix; settled 1897, inc. 1954. With the completion of the Arizona Canal in 1885, the area was settled ...

Wheeling

(Encyclopedia)Wheeling. 1 Village (1990 pop. 29,911), Cook co., NE Ill., a suburb of Chicago; founded c.1830, inc. 1894. Machinery, computer supplies, metal and paper products, security devices, insulation, and che...

terbium

(Encyclopedia)terbium tûrˈbēəm [key] [from Ytterby, a village in Sweden], metallic chemical element; symbol Tb; at. no. 65; at. wt. 158.92535; m.p. 1,356℃; b.p. 3,123℃; sp. gr. about 8.25; valence +3 or +4....

ytterbium

(Encyclopedia)ytterbium ĭtûrˈbēəm [key] [for Ytterby, a town in Sweden], metallic chemical element; symbol Yb; at. no. 70; at. wt. 173.054; m.p. 819℃; b.p. about 1,194℃; sp. gr. about 7.0; valence +2 or +3...