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Ryman, Robert Tracy

(Encyclopedia)Ryman, Robert Tracy, 1930–2019, American painter, b. Nashville, Tenn. While working (1953–60) as a guard at the Museum of Modern Art in New York City he was immersed in modern and contemporary wor...

electrolysis

(Encyclopedia)CE5 Electrolysis: In a typical reaction electrodes are placed in a solution of hydrogen chloride, HCl, which contains both hydrogen and chlorine ions. The battery removes electrons from the anode, ...

Kaiser, Henry John

(Encyclopedia)Kaiser, Henry John, 1882–1967, American industrialist, b. Sprout Brook, N.Y. He organized his first construction company in 1913, soon entered the road-paving business, and by 1930 was a leader in t...

mordant

(Encyclopedia)mordant môrˈdənt [key] [Fr.,=biting], substance used in dyeing to fix certain dyes (mordant dyes) in cloth. Either the mordant (if it is colloidal) or a colloid produced by the mordant adheres to t...

Niagara Falls, city, United States

(Encyclopedia)Niagara Falls, city (1990 pop. 61,840), Niagara co., W N.Y., at the great falls of the Niagara River opposite Niagara Falls, Ont.; inc. 1892. Tourism is one of its oldest industries, and many state pa...

Winston-Salem

(Encyclopedia)Winston-Salem, city (1990 pop. 143,485), seat of Forsyth co., central N.C., in the Piedmont; inc. 1913. It is one of North Carolina's largest cities and foremost industrial centers. Historically a maj...

snowshoes

(Encyclopedia)snowshoes, footgear enabling the wearer to walk on soft snow without sinking. A snowshoe consists of a light frame of tough wood or aluminum, roughly the shape of a large tennis racket, which is strun...

Terre Haute

(Encyclopedia)Terre Haute tĕrˈə hōt, tĕrˈē hŭt [key], city (1990 pop. 51,483), seat of Vigo co., W Ind., on the Wabash River; inc. 1816. The commercial and trade center of a farm and coal-mining region, its...

topaz

(Encyclopedia)topaz tōˈpăz [key], aluminum silicate mineral with either hydroxyl radicals or fluorine, Al2SiO4(F,OH)2, used as a gem. It is commonly colorless or some shade of pale yellow to wine-yellow; pale bl...

tourmaline

(Encyclopedia)tourmaline to͝orˈməlĭn, –lēn [key], complex borosilicate mineral with varying amounts of aluminum, iron, magnesium, sodium, lithium, potassium, and sometimes other elements, used as a gem. It o...