418 ZINC, CADMIUM, LEAD, &c. 



Copper 80 

 Oxygen 20 



100 



So that by the addition of 80 grains, the copper 

 in the liquid is exactly doubled, while the oxy- 

 gen with which it is combined remains the same 

 as at first. Hence, suboxide of copper is ob- 

 viously composed of 



Copper 160 or 16 or 8 

 Oxygen 20 - 2-1 



It is a compound of 2 atoms copper and 1 atom 

 oxygen, and its atomic weight is 9 

 Chloride of 7. Chlorine and copper combine in two pro- 

 portions, and form two chlorides analogous in 

 their composition to the two oxides of copper. 



The perchloride is easily obtained by dis- 

 solving peroxide of copper in muriatic acid, 

 and concentrating the green coloured solution. 

 Permuriate of copper is formed, and may be ob- 

 tained in long four-sided rectangular prisms with 

 square bases. This salt I find, by a careful ana- 

 lysis, is composed of 



1 atom muriatic acid 4 '62 5 



1 atom oxide of copper 5 



2 atoms water . 2-25 



11-875 



