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blackbody

(Encyclopedia)blackbody, in physics, an ideal black substance that absorbs all and reflects none of the radiant energy falling on it. Lampblack, or powdered carbon, which reflects less than 2% of the radiation fall...

British Library

(Encyclopedia)British Library, national library of Great Britain, located in London; one of the world's great libraries. Long a part of the British Museum, the library collection originated in 1753 when the governm...

Shostakovich, Dmitri

(Encyclopedia)Shostakovich, Dmitri dyĭmēˈtrē shŏstŏkôˈvĭch [key], 1906–75, Russian composer, b. St. Petersburg. Shostakovich studied at the Leningrad Conservatory (1919–25). The early success of his Fi...

Taft, William Howard

(Encyclopedia)Taft, William Howard, 1857–1930, 27th President of the United States (1909–13) and 10th chief justice of the United States (1921–30), b. Cincinnati. Taft retired from public life and taught ...

progressivism

(Encyclopedia)progressivism, in U.S. history, a broadly based reform movement that reached its height early in the 20th cent. In the decades following the Civil War rapid industrialization transformed the United St...

criticism

(Encyclopedia)criticism, the interpretation and evaluation of literature and the arts. It exists in a variety of literary forms: dialogues (Plato, John Dryden), verse (Horace, Alexander Pope), letters (John Keats),...

Air Force, United States Department of the

(Encyclopedia)Air Force, United States Department of the, military department within the U.S. Dept. of Defense (see Defense, United States Department of). The Air Force traces its roots to the founding of the Aeron...

Royal Society

(Encyclopedia)Royal Society, oldest scientific organization in Great Britain and one of the oldest in Europe. It was founded in 1660 by a group of learned men in London who met to promote scientific discussion, par...

rickettsia

(Encyclopedia)rickettsia rĭkĕtˈsēə [key], any of an order (Rickettsiales) of very small microorganisms, many disease-causing, that live in vertebrates and are transmitted by bloodsucking parasitic arthropods s...

Diderot, Denis

(Encyclopedia)Diderot, Denis dənēˈ dēdərōˈ [key], 1713–84, French encyclopedist, philosopher of materialism, and critic of art and literature, b. Langres. He was also a novelist, satirist, and dramatist. D...