Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 165
e-fining petroleum to get naptha, kerosene, paraffine, etc. 562. Moisture of the Air. Water constantly evaporatesinto the air. It follows that the air is never completelyfree from moisture. Nor is it often completely saturated,that is, so filled as to be incapable of dissolving more. Thepoint of… … Pig. 182. 563. Hygrometers are instruments for measuring the 156 HEAT.
Physics
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