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Ohio, river, United States

(Encyclopedia)Ohio, river, 981 mi (1,579 km) long, formed by the confluence of the Allegheny and Monongahela rivers in SW Pa., at Pittsburgh; it flows northwest, then generally southwest to enter the Mississippi Ri...

Dickson, Leonard Eugene

(Encyclopedia)Dickson, Leonard Eugene, 1874–1954, American mathematician, b. Independence, Iowa, grad. Univ. of Texas, 1893. He studied in Leipzig and Paris and joined the staff of the Univ. of Chicago in 1900. A...

Troy , cities, United States

(Encyclopedia)Troy. 1 City (1990 pop. 13,051), seat of Pike co., SE Ala., on the Conecuh River; inc. 1843. Products include lumber and wood items, textiles, truck bodies, feed, plastics, and pecans. Troy Univ. and ...

Education, United States Department of

(Encyclopedia)Education, United States Department of, executive department of the federal government responsible for advising on educational plans and policies, providing assistance for education, and carrying out ...

Lewin, Kurt

(Encyclopedia)Lewin, Kurt lo͞oˈĭn [key], 1890–1947, American psychologist, b. Germany, Ph.D. Univ. of Berlin, 1914. He taught at the Univ. of Berlin before coming to the United States in 1932. He was professor...

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