10 CONTENTS. 



CHAPTER II. THE LAWS OF CHANGES OCCASIONED BY HEAT* 



Sect. 1. Expansion by Heat. The Law of Dal ton and Gay-Lussac for 



Gases .................................................. 157 



Sect. 2. Specific Heat. Change of Consistence ........................ 159 



Sect. 3. The Doctrine of Latent Heat ................................. 160 



ATMOLOGY. 



CHAPTER III. THE RELATION OF VAPOR AND AIR. 



Sect. 1. The Boylean Law of the Air's Elasticity ...................... 1G3 



Sect. 2. Prelude to Dal ton'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 



CHAPTER IV. PHYSICAL THEORIES OF HEAT. 



Therrnotical Theories .............................................. 181 



Atmological Theories .............................................. 184 



Conclusion ........................................................ 187 



THE MECEANICO-CHEMICAL SCIENCES. 



BOOK XI. 



HISTORY OF ELECTRICITY. 

 Introduction 191 



CHAPTER I. DISCOVERY OF LAWS OF ELECTRIC PHENOMENA 193 



CHAPTER II. THE PROGRESS OF ELECTRICAL THEORY 201 



Question of One or Two Fluids 210 



Question of the Material Reality of the Electric Fluid 212 



