Vlll CONTENTS. 



Page 



Specific heat of atoms . . 122 



Volumes of atoms in the gaseous state . 126 



Isomorphism . . . .133 



Classification of elements , . 142 



Dimorphism . . . . . 150 



Isomerism . . . , . 155 

 Arrangement of the elements in compounds, 



constitution of salts. . . . 158 



SECT. II. Chemical affinity . . . .179 



Solution . . . . .180 



Order of affinity . . . .186 



Influence of insolubility . . . 189 



Catalysis, or decomposition by contact . 195 



Inductive affinity . . . . 197 



Magnetical polarity . . . . 201 



Magnetical induction . . . 202 



Chemical polarity and induction . . 204 



Simple voltaic circle . . . .207 



Compound voltaic circle . . . 212 



Solid elements of the voltaic circle . . 217 



Liquid elements of the voltaic circle . . 220 



General summary . . . . 227 



Voltaic instruments . 235 



PART II. 



CHAPTER I. 

 Non-metallic elements. 



SECT. I. Oxygen ..... 242 



Combustion in air . . . 252 



SECT. II. Hydrogen ..... 255 



Water 261 



Peroxide of hydrogen . . . 267 



SECT. III. Nitrogen ..... 269 

 The atmosphere . . . .272 



Analysis of air .... 278 



Nitrous oxide, or protoxide of azote . . 283 



Nitric oxide 286 



