CONTENTS 



THE FIRST VOLUME. 



CHAP. PAGE 



I. Historical introduction, . * . . i 



II. Of the atomic theory, . 29 



III. Of the specific gravity of oxygen and hydrogen gases, 49 

 SECT. 1. Of the composition of oxide of zinc, . 51 



2. Of the specific gravity of oxygen gas, . 62 



3. Of the specific gravity of hydrogen gas, 67 



IV. Of the atomic weights and specific gravities of chlo- 



rine and iodine, . . 77 

 SECT. 1. Atomic weight of chlorine, and specific 



gravity of chlorine gas, ib. 



2. Of the atomic weight of iodine, . . 88 



V. Of the atomic weight of azote, and the specific 



gravity of azotic gas, . . Qb 



VI. Of the atomic weights of the acidifiable combustibles, 133 

 SECT. 1. Of the atomic weight of carbon, . ~ 134 



2. Of the atomic weight of boron, . 157 



3. Of the atomic weight of silicon, . . 167 



