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Catlett, Elizabeth

(Encyclopedia)Catlett, Elizabeth, 1915–2012, American-Mexican sculptor, painter, and printmaker, considered one of the foremost African-American artists of her era, b. Washington, D.C., grad. Howard Univ. (B.A., ...

Black, Jeremiah Sullivan

(Encyclopedia)Black, Jeremiah Sullivan, 1810–83, American cabinet officer, b. Somerset co., Pa. Admitted to the Pennsylvania bar in 1830, Black became a successful lawyer. As U.S. Attorney General (1857–60) und...

Weber and Fields

(Encyclopedia)Weber and Fields wĕbˈər [key], American comedy team. The partners were Joe Weber (Joseph Maurice Weber), 1867–1942, and Lew Fields (Lewis Maurice Schanfield), 1867–1941, both born in New York C...

bestiary

(Encyclopedia)bestiary bĕsˈchēĕrˌē [key], a type of medieval book that was widely popular, particularly from the 12th to 14th cent. The bestiary presumed to describe the animals of the world and to show what ...

Ronstadt, Linda

(Encyclopedia)Ronstadt, Linda (Linda Maria Ronstadt), 1946–, American singer, b. Tucson, Ariz. She is known for the clarity and strength of her soprano voice and for the range of song genres in which she performe...

Laplace, Pierre Simon, marquis de

(Encyclopedia)Laplace, Pierre Simon, marquis de pyĕr sēmôNˈ märkēˈ də läpläsˈ [key], 1749–1827, French astronomer and mathematician. At 18 he went to Paris, proved his gift for mathematical analysis to...

calculus of variations

(Encyclopedia)calculus of variations, branch of mathematics concerned with finding maximum or minimum conditions for a relationship between two or more variables that depends not only on the variables themselves, a...

relativity

(Encyclopedia)relativity, physical theory, introduced by Albert Einstein, that discards the concept of absolute motion and instead treats only relative motion between two systems or frames of reference. One consequ...

Meléndez, Luis

(Encyclopedia)Meléndez, Luis lo͞oēsˈ mālānˈdāth [key], 1716–80, Spanish painter. He assisted his father, artist Francisco Melendez, until 1737, when he began studying with Lewis-Michel Vanloo, the court p...

Holm, Jeanne Marjorie

(Encyclopedia)Holm, Jeanne Marjorie, 1921–2010, U.S. military officer, the first female general in the U.S. air force, b. Portland, Oreg. Enlisting in the Women's Army Auxiliary Corps in 1942, she soon joined (19...