The liquefaction of gases : papers / by Michael Faraday, (1823-1845) ; with an appendix consisting of papers by Thomas Northmore on the compression of gases. (1805-1806).

  • Michael Faraday
Date:
1904
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Licence: In copyright

Credit: The liquefaction of gases : papers / by Michael Faraday, (1823-1845) ; with an appendix consisting of papers by Thomas Northmore on the compression of gases. (1805-1806). Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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    apparatus, have been equal to many atmospheres, but that being condensible, a part became liquid, and thus assisted in reducing the force within, to what it was found to be. Ammo7iia.—I find the condensation of ammoniacal gas referred to in Thomson's System, first edition, i. 405, and other editions; Henry's Chemistry, i. 237; Accum's Chemistry, i. 310; Murray's Chemistry, ii. 73; and Thenard's Traite de Chimie, ii. 133. Mr. Accum refers to the experiments of Fourcroy and Vauquelin, Ann. de Chimie, xxix. 289, but has mistaken their object. Those chemists used highly saturated solution of am- monia, see pp. 281, 286, and not the gas ; and their experiments on gases, namely, sulphurous acid gas, muri- atic acid gas, and sulphuretted hydrogen gas, they state were fruitless, p. 287. All we can say is, that the con- densation of most of these gases was above three fourths of their volume. Thomson, Henry, Murray, and, I suppose, Thenard, refer to the experiments of Guyton de Morveau, Ann. de ChiiJiie, xxix. 291, 297. Thomson states the result of Hquefaction at a temperature of - 45°, without referring to the doubt, that Morveau himself raises, respecting the presence of water in the gas ; but Murray, Henry, and Thenard, in their statements notice its probable presence. Morveau's experiment was made in the following manner : a glass retort was charged with the usual mixture of muriate of ammonia, and quick lime, the former material being sublimed, and the latter carefully made from white marble, so as to exclude water as much as possible. The beak of the retort was then adapted to an apparatus con- sisting of two balloons, and two flasks successively con- nected together, and luted by fat lute. The balloons were empty, the first flask contained mercury, the second, water. Heat was then applied to the retort, and the first globe cooled to - 21.25°C., aqueous vapours soon rose.
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