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Bible Encyclopedias

1911 Encyclopedia Britannica


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The name given to many forms of apparatus which have for their object the concentration of matter, or bringing it into a smaller volume, or the intensification of energy. In chemistry the word is applied to an apparatus which cools down, or condenses, a vapour to a liquid; reference should be made to the article Distillation for the various types in use, and also to GAS (Gas Manufacture ) and Coal Tar; the device for the condensation of the exhaust steam of a steam-engine is treated in the article Steam-Engine. In woollen manufactures, "condensation" of the wool is an important operation and is accomplished by means of a "condenser." The term is also given - generally as a qualification, e.g. condensing-syringe, condensing-pump, - to apparatus by which air or a vapour may be compressed. In optics a "condenser" is a lens, or system of lenses, which serves to concentrate or bring the luminous rays to a focus; it is specially an adjunct to the optical lantern and microscope. In electrostatics a condenser is a device for concentrating an electrostatic charge (see Electrostatics; Leyden Jar; Electrophorus).

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Bibliography Information
Chisholm, Hugh, General Editor. Entry for 'Condenser'. 1911 Encyclopedia Britanica. 1910.

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