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Ferguson, Adam

(Encyclopedia)Ferguson, Adam fûrˈgəsən [key], 1723–1816, Scottish philosopher and historian. He was professor of philosophy at the Univ. of Edinburgh (1759–85). His Essay on the History of Civil Society (17...

Engelmann, George

(Encyclopedia)Engelmann, George ĕngˈəlmən [key], 1809–84, American physician and botanist, b. Frankfurt-am-Main, Germany, educated at the universities of Heidelberg and Würzburg (M.D., 1831). Emigrating to A...

Tyndall, John

(Encyclopedia)Tyndall, John tĭnˈdəl [key], 1820–93, British physicist, b. Ireland. He became (1853) professor of natural philosophy at the Royal Institution and in 1867 succeeded Michael Faraday, his friend an...

Bell, Daniel

(Encyclopedia)Bell, Daniel, 1919–2011, American sociologist, b. New York City as Daniel Bolotsky, grad. City College (1939), Columbia (Ph.D., 1960). His immigrant parents changed their surname when he was 13. Bel...

Bailly, Jean Sylvain

(Encyclopedia)Bailly, Jean Sylvain zhäN sēlvăNˈ bäyēˈ [key], 1736–93, French astronomer and politician. His works on astronomy and on the history of science (notably the Essai sur la théorie des satellite...

Prada, Miuccia

(Encyclopedia)Prada, Miuccia, 1949–, Italian fashion designer, b. Milan as Maria Bianchi. She studied political science (Ph.D. Univ. of Milan, 1973) and then studied and performed mime at Milan's Teatro Piccolo. ...

proof, in mathematics

(Encyclopedia)proof, in mathematics, finite sequence of propositions each of which is either an axiom or follows from preceding propositions by one of the rules of logical inference (see symbolic logic). Mathematic...

Ostwald, Wilhelm

(Encyclopedia)Ostwald, Wilhelm vĭlˈhĕlm ôstˈvält [key], 1853–1932, German physical chemist and natural philosopher, b. Riga, Latvia. He was professor of chemistry and director of the chemical laboratory (18...

Hopkins, Mark, American educator

(Encyclopedia)Hopkins, Mark, 1802–87, American educator, b. Stockbridge, Mass., grad. Williams, 1824, and Berkshire Medical School, 1829. After a few months of medical practice he returned (1830) to Williams as p...

Ives, Frederic Eugene

(Encyclopedia)Ives, Frederic Eugene, 1856–1937, American inventor, b. Litchfield, Conn. A pioneer in the development of orthochromatic and trichromatic photography and of photoengraving, he followed an earlier su...