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phonon

(Encyclopedia)phonon fōˈnŏn [key], quantum of vibrational energy. The atoms of any crystal are in a state of vibration, their average kinetic energy being measured by the absolute temperature of the crystal. In ...

De la Beche, Sir Henry Thomas

(Encyclopedia)De la Beche, Sir Henry Thomas də lä bāsh, dĕləbĕshˈ [key], 1796–1855, English geologist. As a result of his private undertaking to prepare a geological map of England, the British government ...

Heinze, Frederick Augustus

(Encyclopedia)Heinze, Frederick Augustus hīnˈzē [key], 1869–1914, American copper magnate, b. Brooklyn, N.Y. He went in 1889 to Butte, Mont., as engineer for a mining company. In 1893 he organized the Montana ...

Angell, James Rowland

(Encyclopedia)Angell, James Rowland, 1869–1949, American educator and psychologist, b. Burlington, Vt., grad. Univ. of Michigan (B.A. 1890; M.A. 1891), M.A. Harvard, 1892; son of James B. Angell. After study abro...

Hadley, Arthur Twining

(Encyclopedia)Hadley, Arthur Twining, 1856–1930, American economist and educator, b. New Haven, Conn.; son of James Hadley. A graduate (1876) of Yale, he was on the faculty (1879–99) and later was president (18...

Greenleaf, Simon

(Encyclopedia)Greenleaf, Simon, 1783–1853, American legal writer, b. Newburyport, Mass. A member of the Maine bar, he won a high reputation for legal scholarship early in his career. With the admission (1820) of ...

meter, unit of measure

(Encyclopedia)meter, abbr. m, fundamental unit of length in the metric system. The meter was originally defined as 1/10,000,000 of the distance between the equator and either pole; however, the original survey was ...

Mahan, Dennis Hart

(Encyclopedia)Mahan, Dennis Hart, 1802–71, American soldier and educator, b. New York City; father of Alfred Thayer Mahan. He graduated (1824) from West Point, and from that year until 1871, except for four years...

Lawrence, William Beach

(Encyclopedia)Lawrence, William Beach, 1800–1881, American political leader and jurist, b. New York City. He was appointed secretary of the legation in Great Britain in 1826 and was made (1827) chargé d'affaires...

Leacock, Stephen Butler

(Encyclopedia)Leacock, Stephen Butler, 1869–1944, Canadian economist and humorist, b. England, grad. Univ. of Toronto (B.A., 1891), Univ. of Chicago (Ph.D., 1903). Head of the department of political science and ...