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oxalic acid

(Encyclopedia)oxalic acid ĕthˌāndīōĭk [key], HO2CCO2H, a colorless, crystalline organic carboxylic acid that melts at 189℃ with sublimation. Oxalic acid and oxalate salts are poisonous. Oxalic acid is found...

stereoscope

(Encyclopedia)stereoscope stĕrˈēəskōpˌ [key], optical instrument that presents to a viewer two slightly differing pictures, one to each eye, to give the effect of depth. In normal vision the two eyes, being a...

Callahan, Harry Morey

(Encyclopedia)Callahan, Harry Morey, 1912–99, American photographer, b. Detroit. Self-taught, he began taking pictures (1938) as a hobby and, inspired by the work of Ansel Adams, began to produce professional-qua...

Mannes, David

(Encyclopedia)Mannes, David mănˈĭs [key], 1866–1959, American violinist, conductor, and educator, b. New York City. Mannes was violinist in the New York Symphony Orchestra from 1891 and its concertmaster from ...

prospecting

(Encyclopedia)prospecting, search for mineral deposits suitable for mining. Modern prospecting has replaced earlier methods based on chance or superstition (e.g., use of the divining rod) with others based on a sci...

Abbott, Berenice

(Encyclopedia)Abbott, Berenice bĕrˌənēsˈ [key], 1898–1991, American photographer, b. Springfield, Ohio. Abbott, who had left (1918) the Midwest for Greenwich Village, then (1921) Paris, had become a sculptor...

Brassaï

(Encyclopedia)Brassaï bräsīˈ [key], 1899–1984, French photographer, b. Brassó, Hungary (now Braşov, Romania), as Gyula Halász. Particularly known for his nightime photographs of Paris, he studied art in Hu...

portraiture

(Encyclopedia)portraiture, the art of representing the physical or psychological likeness of a real or imaginary individual. The principal portrait media are painting, drawing, sculpture, and photography. From earl...

Kertész, André

(Encyclopedia)Kertész, André kĕrtĕshˈ [key], 1894–1985, American photographer, b. Budapest. His black-and-white modernist photographs often capture small, lyrical, and emotionally resonant moments while also...

Eames, Charles

(Encyclopedia)Eames, Charles āmz [key], 1907–78, American designer, b. St. Louis, Mo. He opened his own architectural practice in 1930 and in the late 30s studied with Eliel Saarinen at the Cranbrook Academy, Bl...