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Hall, Marshall

(Encyclopedia)Hall, Marshall, 1790–1857, English physician and physiologist, M.D. Univ. of Edinburgh, 1812. He practiced medicine in Nottingham and in London. He opposed bloodletting and devised a method of artif...

Wolff, Caspar Friedrich

(Encyclopedia)Wolff, Caspar Friedrich käsˈpär frēˈdrĭkh vôlf [key], 1733–94, German biologist, a founder of observational embryology. In his Theoria generationis (1759) he reintroduced the theory of epigen...

Stahl, Georg Ernst

(Encyclopedia)Stahl, Georg Ernst gāˈôrkh ĕrnst shtäl [key], 1660–1734, German physician and chemist. He taught (1694–1716) at the Univ. of Halle, then went to Berlin as court physician. He is known for his...

Butlerov, Aleksandr Mikhailovich

(Encyclopedia)Butlerov, Aleksandr Mikhailovich əlyĭksänˈdər mēkhīlˈəvĭch bo͞otˈlyərôf [key], 1825–86, Russian chemist. As professor at the Univ. of Kazan he founded the first school of Russian chemi...

intelligent design

(Encyclopedia)intelligent design, theory that some complex biological structures and other aspects of nature show evidence of having been designed by an intelligence. Such biological structures are said to have int...

Christian, Charlie

(Encyclopedia)Christian, Charlie (Charles Henry Christian), 1916–42, African-American jazz guitarist, b. Bonham, Tex. The son of a singer-guitarist father and pianist mother, he grew up in Oklahoma City, where he...

fall line

(Encyclopedia)fall line, boundary between an upland region and a coastal plain across which rivers from the upland region drop to the plain as falls or rapids. A fall line is formed in an area where the rivers have...

Roach, Hal

(Encyclopedia)Roach, Hal (Harold Eugene Roach, Sr.), 1892–1992, American move producer and director, b. Elmira, N.Y. He entered (1912) the motion-picture industry as an extra, and by 1914 had founded a production...

campanile

(Encyclopedia)campanile kămpənēˈlē, Ital. kämpänēˈlā [key], Italian form of bell tower, constructed chiefly during the Middle Ages. Built in connection with a church or a town hall, it served as a belfry ...

Lorenz, Edward Norton

(Encyclopedia)Lorenz, Edward Norton, 1917–2008, American meteorologist and pioneer of chaos theory, b. West Hartford, Conn., Ph.D. Massachusetts Institute of Technology, 1948. Lorenz became interested in meteorol...