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WILLIAM HENRY (1795-1836)

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Originally appearing in Volume V13, Page 302 of the 1911 Encyclopedia Britannica.
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WILLIAM HENRY (1795-1836)  ,
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English chemist, son of Thomas Henry (1734—1816), an apothecary and writer on chemistry, was born at Manchester on the 12th of December 1775 . He began to study
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medicine at
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Edinburgh in 1795, taking his doctor's degree in 1807, but
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ill-
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health interrupted his practice as a physician, and he devoted his time mainly to chemical research, especially in regard to gases . One. of his best-known papers (Phil . Trans., 1803) describes experiments on the quantity of gases absorbed by
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water at different temperatures and under different pressures, the conclusion he reached (" Henry's law ") being that " water takes up of
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gas condensed by one, two or more additional atmospheres, a quantity which, ordinarily compressed, would be equal to twice, thrice, &c. the
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volume absorbed under the
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common pressure of the atmosphere." Others of his papers
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deal with gas-analysis, fire-
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damp,
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illuminating gas, the composition of hydrochloric acid and of
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ammonia, urinary and other morbid concretions, and the disinfecting powers of heat . His Elements of Experimental Chemistry (1799) enjoyed considerable vogue in its day, going through 11
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editions in 30 years . He died at Pendlebury, near Manchester, on the and of September 1836 .

End of Article: WILLIAM HENRY (1795-1836)
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