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sonar

(Encyclopedia)sonar sōˈnär [key], device used underwater for locating submerged objects and for submarine communication by means of sound waves. The term sonar is an acronym for sound navigation ranging. The mai...

propeller

(Encyclopedia)propeller, device consisting of a hub with one or more blades that propels a craft to which it is attached by rotating its blades in a fluid such as air or water. In the latter part of the 1830s the S...

Jackson

(Encyclopedia)Jackson. 1 City (1990 pop. 37,446), seat of Jackson co., S Mich., on the Grand River; inc. 1857. It is an industrial and commercial center in a farm region. The city's chief manufactures are machinery...

Dunmore, John Murray, 4th earl of

(Encyclopedia)Dunmore, John Murray, 4th earl of, 1732–1809, British colonial governor of Virginia, a Scottish peer. Appointed governor of New York in 1770, he remained there for about 11 months before being trans...

Cornell University

(Encyclopedia)Cornell University, mainly at Ithaca, N.Y.; with land-grant, state, and private support; coeducational; chartered 1865, opened 1868. It was named for Ezra Cornell, who donated $500,000 and a tract of ...

Charles I, king of Hungary

(Encyclopedia)Charles I, 1288–1342, king of Hungary (1308–42), founder of the Angevin dynasty in Hungary; grandson of Charles II of Naples, who had married a daughter of Stephen V of Hungary. On the death (1301...

Wade, Benjamin Franklin

(Encyclopedia)Wade, Benjamin Franklin, 1800–1878, U.S. senator from Ohio (1851–69), b. near Springfield, Mass. He moved (1821) to Ohio and studied law. He was successively prosecuting attorney of Ashtabula co.,...

Pusey, Nathan Marsh

(Encyclopedia)Pusey, Nathan Marsh pyo͞oˈzē [key], 1907–2001, American educator, b. Council Bluffs, Iowa, grad. Harvard (B.A., 1928; M.A., 1932; Ph.D., 1937). A classical scholar, Pusey taught at Lawrence Colle...

settlement house

(Encyclopedia)settlement house, neighborhood welfare institution generally in an urban slum area, where trained workers endeavor to improve social conditions, particularly by providing community services and promot...

Evarts, William Maxwell

(Encyclopedia)Evarts, William Maxwell ĕvˈərts [key], 1818–1901, American lawyer and statesman, b. Boston; grandson of Roger Sherman. After attending Harvard Law School he began (1841) to practice law in New Yo...