395 
new compound of chlorine and carbon. 
chlorine, which was readily found in it. When detonated with 
oxygen, the substance being in excess, there was expansion 
«f volume, carbonic oxide, carbonic acid, and chloride of 
mercury being formed. 
When phosphorus, iron, tin, &c. were heated to redness in 
its vapour over mercury, it was decomposed, chlorides of those 
substances being formed, and charcoal deposited ; and M. 
Julin has shown that the same effect is produced by po- 
tassium. 
Three grains of this substance were passed in vapour over 
pure peroxide of copper, heated to redness in a green glass 
tube : a very small portion passed undecomposed. The gas 
received over mercury equalled 5.7 cubic inches ; it was car- 
bonic acid gas. A small part of the oxide of copper was 
reduced, and portions of a crystalline body appeared within 
the tube, which, on examination, proved to be chloride of 
copper. Some of this was used in making experiments on 
its nature ; but when that was ascertained, the remaining con- 
tents of the tube were dissolved in nitric acid, and precipi- 
tated by nitrate of silver: 6.1 grains of chloride of silver were 
obtained. 
Two grains were passed over pure quick lime, raised to a 
red heat in #green glass tube. The moment the vapour 
came in contact with the hot lime, ignition took place, and the 
earth burned as long as the vapour passed over it. When 
cold, the tube was examined, and much charcoal found de- 
posited at the spot where the ignition occurred. The con- 
tents of the tube were dissolved in nitric acid, and the filtered 
solution precipitated by nitrate of silver : 5.9 grains of chloride 
of silver were obtained. 
3 E 
MDCCCXXI. 
