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Freundlich, Erwin Finlay

(Encyclopedia)Freundlich, Erwin Finlay froindˈlĭkh [key], 1885–1964, German astronomer. Freundlich obtained a doctorate in mathematics at Göttingen, then joined the Royal Observatory at Berlin, where he worked...

Froude, William

(Encyclopedia)Froude, William fro͞od [key], 1810–79, English engineer and naval architect, brother of J. Anthony Froude; educated at Oxford. In 1837 he worked on the Bristol and Exeter railroad, constructing the...

amplitude

(Encyclopedia)amplitude ămˈplĭto͞odˌ [key], in physics, maximum displacement from a zero value or rest position. In the harmonic motion of a pendulum, the amplitude of the swing is the greatest distance reache...

Tibbett, Lawrence

(Encyclopedia)Tibbett, Lawrence tĭbˈĭt [key], 1896–1960, American baritone, b. Bakersfield, Calif. He made his debut at the Metropolitan Opera House in 1923. After a successful appearance as Ford in Verdi's Fa...

Addams, Charles Samuel

(Encyclopedia)Addams, Charles Samuel, 1912–88, American cartoonist, b. Westfield, N.J. Beginning in 1932, Addams's work appeared regularly in the New Yorker, to which he eventually contributed more than 1,300 car...

Tobey, Mark

(Encyclopedia)Tobey, Mark, 1890–1976, American painter, b. Centerville, Wis. An avid traveler, Tobey visited China and Japan in 1934. He then developed his celebrated “white writing,” in which he attempted to...

Burns, George

(Encyclopedia)Burns, George, 1896–1996, b. New York City as Nathan Birnbaum, and his wife Gracie Allen, 1906–64, b. San Francisco, American comedy team (1923–58). In vaudeville in the 1920s, on radio (1932–...

Dreyer, Carl Theodor

(Encyclopedia)Dreyer, Carl Theodor kärl tāˈōdôrˌ drīˈər [key], 1889–1968, Danish motion picture director. He began making films in Denmark in 1919. His Passion of Joan of Arc (1928), widely regarded as a...

gyroscope

(Encyclopedia)CE5 Three-frame gyroscope gyroscope jīˈrəskōpˌ [key], symmetrical mass, usually a wheel, mounted so that it can spin about an axis in any direction. When spinning, the gyroscope has special p...

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...