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Langer, Susanne Knauth

(Encyclopedia)Langer, Susanne Knauth nouth lăngˈər [key], 1895–1986, American philosopher, b. New York City, grad. Radcliffe (B.A., 1920; Ph.D., 1926). After holding various teaching posts, she was a lecturer ...

Queensberry, John Sholto Douglas, 8th marquess of

(Encyclopedia)Queensberry, John Sholto Douglas, 8th marquess of, 1844–1900, British nobleman, originator of the code of rules that governs modern boxing. He served in the British army and navy and later was a mem...

Perkins, Frances

(Encyclopedia)Perkins, Frances, 1882–1965, U.S. Secretary of Labor (1933–45), b. Boston. She worked at Hull House, was executive secretary of the New York Consumers' League (1910–12) and of the New York Commi...

Fermat, Pierre de

(Encyclopedia)Fermat, Pierre de pyĕr də fĕrmäˈ [key], 1601–65, French mathematician. A magistrate whose avocation was mathematics, Fermat is known as a founder of modern number theory and probability theory....

Maxwell, James Clerk

(Encyclopedia)Maxwell, James Clerk klärk [key], 1831–79, great Scottish physicist. After a brilliant career at Edinburgh and Cambridge, where he won early recognition with mathematical papers, he was a professor...

celestial mechanics

(Encyclopedia)celestial mechanics, the study of the motions of astronomical bodies as they move under the influence of their mutual gravitation. Celestial mechanics analyzes the orbital motions of planets, dwarf pl...

Kepler's laws

(Encyclopedia)CE5 Schematic representation of Kepler's second law: The areas ABF and A′B′F′ are equal and are swept out in equal intervals of time by a planet orbiting around the sun (at F). Kepler's laws...

Frank, Robert

(Encyclopedia)Frank, Robert, 1924–2019, Swiss-American photographer and filmmaker, b. Zürich. He immigrated to the United States in 1947 and became a citizen in 1963. One of the 20th century's most influential p...

Hawks, Howard

(Encyclopedia)Hawks, Howard (Howard Winchester Hawks), 1896–1977, American film director, b. Goshen, Ind. Although not as well known as such contemporaries as John Ford and Alfred Hitchcock, he has been criticall...

giardiasis

(Encyclopedia)giardiasis jēärdīˈəsĭs, järdīˈəsĭs [key], infection of the small intestine by a protozoan, Giardia lamblia. Giardia, which was named after Alfred M. Giard, a French biologist, is spread via...