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Baldwin, Robert

(Encyclopedia)Baldwin, Robert, 1804–58, Canadian statesman, leader of the movement for representative government in Canada, b. York (now Toronto), Ont. His father, William Warren Baldwin (1775–1844), was a lead...

cyano group

(Encyclopedia)cyano group sīˈənō, sī-ănˈō [key], in chemistry, functional group that consists of a carbon atom joined to a nitrogen atom by a triple bond; it can be joined to an atom or another group by a s...

benzene

(Encyclopedia)benzene bĕnˈzēn, bĕnzēnˈ [key], colorless, flammable, toxic liquid with a pleasant aromatic odor. It boils at 80.1℃ and solidifies at 5.5℃. Benzene is a hydrocarbon, with formula C6H6. The s...

saturation, of an organic compound

(Encyclopedia)saturation, of an organic compound, condition occurring when its molecules contain no double or triple bonds and thus cannot undergo addition reactions. For example, ethane (H3C–CH3) is a saturated ...

welding

(Encyclopedia)welding, process for joining separate pieces of metal in a continuous metallic bond. Cold-pressure welding is accomplished by the application of high pressure at room temperature; forge welding (forgi...

Horsley, Sir Victor Alexander Haden

(Encyclopedia)Horsley, Sir Victor Alexander Haden, 1857–1916, English surgeon and neurologist. A specialist in surgery of the endocrine glands and the nervous system, he devised a noted operation for spinal-cord ...

Durant, William James

(Encyclopedia)Durant, William James, 1885–1981, American historian and essayist, b. North Adams, Mass. He received his Ph.D. from Columbia in 1917 and published his doctoral dissertation, Philosophy and the Socia...

Duval, William Pope

(Encyclopedia)Duval, William Pope do͞ovôlˈ, –vălˈ [key], 1784–1854, American frontiersman, territorial governor of Florida (1822–34), b. near Richmond, Va. He went to Kentucky as a young man, studied law...

Dwiggins, William Addison

(Encyclopedia)Dwiggins, William Addison, 1880–1956, American type designer, calligrapher, and book designer, b. Martinsville, Ohio. He attained prominence as an illustrator and commercial artist, and he brought t...

Dwight, Theodore William

(Encyclopedia)Dwight, Theodore William, 1822–92, American lawyer, b. Catskill, N.Y., grad. Hamilton College, 1840. He studied at Yale law school and was admitted to the bar in 1845. He was professor of law and la...