CHAPTER III

.--THE RELATION OF VAPOR AND AIR.

_Sect._ 1. The Boylean Law of the Air's Elasticity. 163 _Sect._ 2. Prelude to Dalton's Doctrine of Evaporation. 165 _Sect._ 3. Dalton's Doctrine of Evaporation. 170 _Sect._ 4. Determination of the Laws of the Elastic Force of Steam. 172 _Sect._ 5. Consequences of the Doctrine of Evaporation.--Explanation of Rain, Dew, and Clouds. 176

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