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war, laws of

(Encyclopedia)war, laws of, in international law, rules and principles regulating an armed conflict between nations. These laws are designed to minimize the destruction of life and property, to proscribe cruel trea...

Royal George

(Encyclopedia)Royal George, British naval vessel that sank on Aug. 29, 1782, while undergoing repairs at Spithead. Its commander, Admiral Richard Kempenfelt, and about 800 sailors and visitors were drowned. The inc...

Four-H

(Encyclopedia)Four-H or 4-H, organization for boys and girls, generally from 8 to 18 years of age; some states offer programs for younger children, and there are also collegiate programs. 4-H teaches young people l...

pyranometer

(Encyclopedia)pyranometer pĭrˌənŏmˈətər [key], actinometer used to measure the total radiation incident on a surface. ...

refraction

(Encyclopedia)refraction, in physics, deflection of a wave on passing obliquely from one transparent medium into a second medium in which its speed is different, as the passage of a light ray from air into glass. O...

Newtown

(Encyclopedia)Newtown, town (1990 pop. 20,779), Fairfield co., SW Conn., on the Housatonic; inc. 1711. Pressure gauges, plastics, and paper and metal products are made, and dairy and fruit farms are in the area. In...

Compton effect

(Encyclopedia)Compton effect [for A. H. Compton], increase in the wavelengths of X rays and gamma rays when they collide with and are scattered from loosely bound electrons in matter. This effect provides strong ve...

Roberts, Elizabeth Madox

(Encyclopedia)Roberts, Elizabeth Madox, 1886–1941, American poet and novelist, b. Perryville, Ky., grad. Univ. of Chicago, 1921. She is best known for her novels and stories of the Kentucky mountain people, whose...

King, Coretta Scott

(Encyclopedia)King, Coretta Scott, 1927–2006, American civil-rights leader, b. Heiberger, Ala.; the wife (1953–68) of Martin Luther King, Jr. After her husband's assassination, she carried on his civil-rights w...

Doddridge, Philip

(Encyclopedia)Doddridge, Philip, 1702–51, English nonconformist minister and noted hymn writer. His Rise and Progress of Religion in the Soul (1745) has been much translated. His many hymns include “Awake, My S...