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Edison, Thomas Alva

(Encyclopedia)Edison, Thomas Alva, 1847–1931, American inventor, b. Milan, Ohio. A genius in the practical application of scientific principles, Edison was one of the greatest and most productive inventors of his...

hedge fund

(Encyclopedia)hedge fund, in finance, a largely unregulated investment device with a relatively small number of investors that aims to outperform the markets. Originating in the 1950s, the funds “hedge” by offs...

Hesse

(Encyclopedia)Hesse hĕs, hēsˈē, hĕsˈə [key], Ger. Hessen, state, 8,150 sq mi (24,604 sq km),...

pragmatism

(Encyclopedia)pragmatism prăgˈmətĭzəm [key], method of philosophy in which the truth of a proposition is measured by its correspondence with experimental results and by its practical outcome. Thought is consid...

voting machine

(Encyclopedia)voting machine, instrument for recording and counting votes. The voting machine itself is generally positioned in a booth, often closed off by a curtain to assure secrecy for the voter. In the case of...

protection

(Encyclopedia)protection, practice of regulating imports and exports with the purpose of shielding domestic industries from foreign competition. To accomplish that end, certain imports may be excluded entirely, imp...

pressure

(Encyclopedia)pressure, in mechanics, ratio of the force acting on a surface to the area of the surface; it is thus distinct from the total force acting on a surface. A force can be applied to and sustained by a si...

European Southern Observatory

(Encyclopedia)European Southern Observatory (ESO), an intergovernmental organization for astronomical research with headquarters in Garching, near Munich, Germany. The ESO began in 1962 as a consortium among Belgiu...

Byzantine music

(Encyclopedia)Byzantine music, the music of the Byzantine Empire composed to Greek texts as ceremonial, festival, or church music. Long thought to be only a further development of ancient Greek music, Byzantine mus...

specific gravity

(Encyclopedia)specific gravity, ratio of the weight of a given volume of a substance to the weight of an equal volume of some reference substance, or, equivalently, the ratio of the masses of equal volumes of the t...