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sulfate

(Encyclopedia)sulfate, chemical compound containing the sulfate (SO4) radical. Sulfates are salts or esters of sulfuric acid, H2SO4, formed by replacing one or both of the hydrogens with a metal (e.g., sodium) or a...

Armstrong, John, 1758–1843, American army officer

(Encyclopedia)Armstrong, John, 1758–1843, American army officer, U.S. Secretary of War (1813–14), b. Carlisle, Pa.; son of John Armstrong, “hero of Kittanning.” In the American Revolution he was on the staf...

lumber

(Encyclopedia)lumber, term for timber that has been cut into boards for use as a building material. The major steps in producing lumber involve logging (the felling and preparation of timber for shipment to sawmill...

Middletown, cities, United States

(Encyclopedia)Middletown. 1 Industrial city (1990 pop. 42,762), Middlesex co., central Conn., on the west bank of the Connecticut River; settled 1650, inc. 1784, town and city consolidated 1923. Its manufactures in...

Lansbury, George

(Encyclopedia)Lansbury, George lănzˈbərē [key], 1859–1940, British Labour party leader. During the 1880s he was influenced by Christian socialism, and he later joined (1892) the Social Democratic Federation. ...

Law, Andrew Bonar

(Encyclopedia)Law, Andrew Bonar bŏnˈər [key], 1858–1923, British statesman, b. Canada. He went to Scotland as a boy and in 1900, after a business career, was elected to Parliament as a Conservative. He soon be...

barite

(Encyclopedia)barite bərīˈtēz [key] [New Lat., from barium], or heavy spar, a white, yellow, blue, red, or colorless mineral. It is a sulfate of barium, BaSO4, found in nature as tabular crystals or in granular...

Tian Shan

(Encyclopedia)Tian Shan or Tien Shan both: tēĕn shän [key] [Chin.,=celestial mountains], mountain system of central Asia, extending c.1,500 mi (2,410 km) from the Pamir Mts., Tajikistan, NE through the Xinjiang ...

Rhett, Robert Barnwell

(Encyclopedia)Rhett, Robert Barnwell, 1800–1876, American politician, b. Beaufort, S.C. His family changed its name from Smith to Rhett (after a colonial ancestor) in 1837. A lawyer, he was a state legislator, st...

condor

(Encyclopedia)condor, common name for certain American vultures, found in the high peaks of the Andes of South America and the Coast Range of S California. Condors are the largest of the living birds, nearly 50 in....