CONTENTS OF VOLUME I. 



Page. 



PLAN OF THE WORK, - - 1 



INTRODUCTION, - - . - 7 



PART I. IMPONDERABLE AGENTS. 



Sec. I. LIGHT, . . 35 



Its materiality velocity, - -25 



Its refraction, . - 26 



Solar phosphori, - - - 29 



Its chemical agency, - 31 



" action on animals and vegetables, - - - 32 



" " " mineral bodies, - 33 



" connection with magnetism sources of light 



Leslie's Photometer, - - - 34 



Sec. II. HEAT OR CALORIC, . 35 



General nature, - ~ " 



Conclusions, - 42 



Effects, . 44 



1. Expansion, - " 

 Thermometers, - - - 54 



2. Distribution of Temperature, - 63 

 Conduction Radiation, - - 65 



3. Congelation and Liquefaction, - 82 



4. Vaporization and Gasification, - 84 

 Steam Engines, 92 



5. Spontaneous evaporation, - - 104 

 Effects cold, &c. 105 

 Wollaston's cryophorus, - 116 



6. Ignition or Incandescence, 117 



7. Capacity for Heat Specific Heat, - 1 19 



8. Combustion, - 126 

 Sec. III. APPENDIX TO CALORIC SOURCES OF HEAT AND 



COLD, 127 



Blowpipe, 128 



Table of freezing mixtures, - 136 



Sec. IV. ATTRACTION, - 137 



Gravitation, - 



Magnetism Galvanism, - 138 



Cohesion and Aggregation, - 139 



Crystallization, - 141 



Chemical Attraction or Affinity, 151 



Definite proportions, 160 



