Elements of chemistry : including the applications of the science in the arts . Water is elastic and compressible, yielding, according to Oersted, 53 millionthsof its bulk to the pressure of the atmosphere, and, like air, in proportion to thecompressing force for different pressures. The peculiarities of its expansion by heat,while liquid, have already been fully described (page 38). Under a barometricpressure of 30 inches, it boils at 212°, but evaporates at all inferior boiling point is elevated by the solution of salts in it, and the temperature ofthe steam from these solut
Elements of chemistry : including the applications of the science in the arts . Water is elastic and compressible, yielding, according to Oersted, 53 millionthsof its bulk to the pressure of the atmosphere, and, like air, in proportion to thecompressing force for different pressures. The peculiarities of its expansion by heat,while liquid, have already been fully described (page 38). Under a barometricpressure of 30 inches, it boils at 212°, but evaporates at all inferior boiling point is elevated by the solution of salts in it, and the temperature ofthe steam from these solutions is not constantly 212°, as has been alleged, but thatof the last strata of liquid through which the steam has passed. When mixed withair, the vapour of water has a tendency to condense, it is said, in vesicles, whichinclose air; forming in this condition the masses of clouds, which remain suspendedin the atmosphere from the lightness of the vesicles, the substance of mists and fogs,and vapour generally, in its popular meaning. The vesicles may be observed bya lens of
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