Online Encyclopedia

PERMEAMETER

Online Encyclopedia
Originally appearing in Volume V21, Page 176 of the 1911 Encyclopedia Britannica.
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PERMEAMETER  , an

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instrument for rapidly measuring the
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permeability of a
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sample of
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iron or
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steel with sufficient accuracy for many commercial purposes . The name was first applied by S . P .
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Thompson to an apparatus devised by himself in 189o, which indicates the
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mechanical force required to detach one end of the sample, arranged as the core of a straight electromagnet, from an iron yoke of
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special
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form; when this force is known, the permeability can be easily calculated .

End of Article: PERMEAMETER
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PERMIAN

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