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Rydberg, Johannes Robert

(Encyclopedia)Rydberg, Johannes Robert yo͞oˈhänəs rôˈbərt rüdˈbĕryə [key], 1854–1919, Swedish physicist. Rydberg was a professor at Lund from 1901 to 1919. He is best known for his grouping of the freq...

Cronin, A. J.

(Encyclopedia)Cronin, A. J. (Archibald Joseph Cronin) krōˈnĭn [key], 1896–1981, Scottish novelist. He gave up his prosperous London medical practice to devote himself to writing after the success of his first ...

direction finder

(Encyclopedia)direction finder, electronic device used to determine the position of a ship or aircraft. In a simple direction finder a radio receiver is equipped with a revolving directional antenna. The antenna re...

Europa, in astronomy

(Encyclopedia)Europa yo͝orōˈpə [key], in astronomy, one of the 39 known moons, or natural satellites, of Jupiter. Magnetic-field data collected by the space probe Galileo in 2002 strongly indicated a liquid-wat...

Elizabeth, Saint, daughter of King Andrew II of Hungary

(Encyclopedia)Elizabeth, Saint, 1207–31, daughter of King Andrew II of Hungary and wife of Landgrave Louis II of Thuringia. She is called St. Elizabeth of Hungary. She led a simple life, personally tended the sic...

killdeer

(Encyclopedia)killdeer, common North American shorebird related to the plover and the sandpiper. It is about 10 in. (25 cm) in length and its plumage is grayish brown with a double black band across a white breast....

harmonic motion

(Encyclopedia)CE5 Harmonic motion is exhibited by a weight vibrating on the end of a spring. In A, the displacement of the object from its equilibrium position and the acceleration of the object are at a maximum...

Gray, John Chipman

(Encyclopedia)Gray, John Chipman, 1839–1915, American lawyer and teacher, b. Brighton, Mass. A graduate of Harvard Law School (1861), he served in the Civil War and then entered law practice in Boston; in 1869 he...

Holdsworth, Sir William Searle

(Encyclopedia)Holdsworth, Sir William Searle, 1871–1944, British legal historian. He was (1903–8) professor of constitutional law at University College, London. After 1922 he was Vinerian professor of English l...

Dwight, Theodore William

(Encyclopedia)Dwight, Theodore William, 1822–92, American lawyer, b. Catskill, N.Y., grad. Hamilton College, 1840. He studied at Yale law school and was admitted to the bar in 1845. He was professor of law and la...