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Williams, Ephraim

(Encyclopedia)Williams, Ephraim, 1715–55, American soldier, founder of Williams College, b. Newton, Mass. After several years as a sailor, he lived in Massachusetts and took part in defending the frontier against...

Students for a Democratic Society

(Encyclopedia)Students for a Democratic Society (SDS), in U.S. history, a radical student organization of the 1960s. In the influential Port Huron (Mich.) Statement (1962), the organization, founded in 1960, presen...

Tchernaiev, Mikhail Grigoryevich

(Encyclopedia)Tchernaiev or Chernyaiev, Mikhail Grigoryevich mēkhəyēlˈ grĭgôrˈyəvĭch chĭrnyīˈəf [key], 1828–98, Russian general and Pan-Slavist. Sent on a minor mission to central Asia in 1864, he ex...

Brome, Richard

(Encyclopedia)Brome, Richard bro͞om, brōm [key], c.1590–1652, English dramatist. He was the friend, servant, and disciple of Ben Jonson. Primarily a writer of realistic satiric comedy, picturing the life and ma...

momentum

(Encyclopedia)momentum mōmĕnˈtəm [key], in mechanics, the quantity of motion of a body, specifically the product of the mass of the body and its velocity. Momentum is a vector quantity; i.e., it has both a magn...

electrocardiography

(Encyclopedia)electrocardiography ĭlĕkˌtrōkärdēŏgˈrəfē [key], science of recording and interpreting the electrical activity that precedes and is a measure of the action of heart muscles. Since 1887, when ...

field, in physics

(Encyclopedia)field, in physics, region throughout which a force may be exerted; examples are the gravitational, electric, and magnetic fields that surround, respectively, masses, electric charges, and magnets. The...

price

(Encyclopedia)price, amount of money for which a unit of goods or services is exchanged. Price is equivalent to market value and may or may not measure the intrinsic value of the goods or services to the buyer or s...

Jevons, William Stanley

(Encyclopedia)Jevons, William Stanley jĕvˈənz [key], 1835–82, English economist and logician. After working in Australia as assayer to the mint, he taught at Owens College, Manchester, and University College, ...

Lafayette Escadrille

(Encyclopedia)Lafayette Escadrille ĕskədrĭlˈ [key], small group of American volunteer aviators in World War I, created (Apr., 1916) as Escadrille Américaine in the French air service. It was renamed the Lafaye...