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Still, Andrew Taylor

(Encyclopedia) Still, Andrew Taylor, 1828–1917, founder of osteopathy, b. Jonesboro, Va. He evolved the theory that all diseases and physical disorders ultimately derived from dislocations (which he…

Sauer, Carl Ortwin

(Encyclopedia) Sauer, Carl Ortwin, 1889–1975, American geographer, b. Warrenton, Mo., grad. Univ. of Chicago (Ph.D., 1915). Sauer was a professor for over 50 years at the Univ. of California at…

naturalism, in art

(Encyclopedia) naturalism, in art, a tendency toward strict adherence to the physical appearance of nature and rejection of ideal forms. Artists as diverse as Velázquez, J. F. Millet, and Monet, have…

physician assistant

(Encyclopedia) physician assistant (PA), health-care professional who provides patient services ranging from taking medical histories and doing physical examinations to performing minor surgical…

Crapsey, Algernon Sidney

(Encyclopedia) Crapsey, Algernon Sidney, 1847–1927, American Episcopal clergyman, b. Fairmont, Ohio. In 1879 he became rector of St. Andrew's Church, Rochester, N.Y., which under his administration…

Franck, James

(Encyclopedia) Franck, JamesFranck, Jamesfrängk [key], 1882–1964, German physicist. He was professor of physics at Göttingen and at Johns Hopkins (1935–38) and professor of physical chemistry at the…

van't Hoff, Jacobus Hendricus

(Encyclopedia) van't Hoff, Jacobus Hendricusvan't Hoff, Jacobus Hendricusyäkōˈbəs hĕndrēˈkəs vänt hôf [key], 1852–1911, Dutch physical chemist. He taught at the universities of Amsterdam (1878–96)…

Tizard, Sir Henry Thomas

(Encyclopedia) Tizard, Sir Henry Thomas, 1885–1959, English physical chemist and scientific adviser. He was educated at Westminster school and Magdalen College, Oxford, from which he received honors…

Leopardi, Giacomo

(Encyclopedia) Leopardi, GiacomoLeopardi, Giacomojäˈkōmō lāōpärˈdē [key], 1798–1837, Italian poet and scholar, considered Italy's outstanding 19th-century poet. An intellectual prodigy, he taught…

perception

(Encyclopedia) perception, in psychology, mental organization and interpretation of sensory information. The Gestalt psychologists studied extensively the ways in which people organize and select…