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stereopticon

(Encyclopedia)stereopticon stĕrēŏpˈtĭkən [key], optical projection instrument making multiple use of the magic lantern. The magic lantern uses lenses to throw on a screen a magnified image from a transparent ...

theremin

(Encyclopedia)theremin thĕrˈəmən [key], one of the earliest electronic musical instruments, invented (1920) in the Soviet Union and named for its creator, Leon Theremin. A forerunner of the synthesizer, it cons...

Gossec, François Joseph

(Encyclopedia)Gossec, François Joseph fräNswäˈ zhôzĕfˈ gôsĕkˈ [key], 1734–1829, Belgian composer; pupil of Rameau. In 1784 he organized the École Royale de Chant and taught (1795–1816) composition at...

foehn

(Encyclopedia)foehn fān, Ger. fön [key], warm, dry wind that occurs on the leeward slopes of a ridge of mountains. The term was originally applied to a wind of the Alps but is now used as a generic term for all w...

thunderstorm

(Encyclopedia)thunderstorm, violent, local atmospheric disturbance accompanied by lightning, thunder, and heavy rain, often by strong gusts of wind, and sometimes by hail. The typical thunderstorm caused by convect...

Abel, Sir Frederick Augustus

(Encyclopedia)Abel, Sir Frederick Augustus, 1826–1902, English chemist, an authority on explosives. He was professor of chemistry at the Royal Military Academy (1851–55) and chemist to the War Dept. and governm...

Chladni, Ernst Florens Friedrich

(Encyclopedia)Chladni, Ernst Florens Friedrich ĕrnst flōˈrĕns frēˈdrĭkh klädˈnē [key], 1756–1827, German physicist. An authority on acoustics, he made studies of the transmission of sound in various gas...

flügelhorn

(Encyclopedia)flügelhorn flüˈgəlhôrnˌ [key], three-valved brass instrument similar in size and shape to the trumpet but having a conical rather than a cylindrical bore and possessing a larger bell. Because of...

Lambeth Conference

(Encyclopedia)Lambeth Conference, convocation at Lambeth Palace, London, that brings together all the bishops in the Anglican Communion. It meets about every 10 years at the invitation of the archbishop of Canterbu...

barograph

(Encyclopedia)barograph, instrument used to make a continuous recording of atmospheric pressure. The pressure-sensitive element, a partially evacuated metal cylinder, is linked to a pen arm in such a way that the v...