of Chlorine and Carbon, fc. 343 
heated more strongly in vapour, the iodine separates chlorine, 
reducing the perchloride to the fluid protochloride of carbon, and 
chloriodine is produced, This dissolves, and if no excess of 
iodine be present, the whole remains fluid at common tempera- 
tures. When water is added, it generally liberates a little iodine ; 
and on heating the solution, so as to drive off all free iodine, 
and testing by nitrate of silver, chloride and iodide of silver are 
obtained. 
Hydrogen and the vapour of the substance would not inflame 
at the temperature of 400° Fahr. by strong electrical sparks ; but 
when the mixture was sent through a red-hot tube, the chloride 
was decomposed, and muriatic acid gas and charcoal produced. 
The vapour of the perchloride of carbon readily detonates by 
the electric spark with a mixture of oxygen and hydrogen gases; 
but the gaseous results are very mixed and uncertain, from the 
near equipoise of affinities that exist among the elements. 
Sulphur readily unites to it when melted with it, and the mix- 
ture crystallizes on cooling into a yellowish mass. When heated 
more strongly, the substance rises unchanged, and leaves the 
sulphur unaltered; but when the mixed vapours are raised toa 
still higher temperature, chloride of sulphur and protochloride of 
carbon are formed. Sometimes there are appearances as if a 
carburet of sulphur were formed, but of this I have not satisfied 
myself, 
Phosphorus at low temperatures melts and unites with the 
substance, without any decomposition. If heated in the vapour 
of the substance, but not too highly, it takes away chlorine, and 
forms the protochlorides of phosphorus and carbon. If heated 
more highly, it frequently inflames in the vapour with a brilliant 
combustion, and abundance of charcoal is deposited. Some- 
times I have had the charcoal left in films stretching across the 
tubes, and occupying the space where the flame passed. The 
appearance is then very beautiful. 
When phosphorus is heated with the vapour of the substance 
over mercury, so as not to inflame in it, there is generally a 
small portion of muriatic acid gas formed. If great care be 
taken, this is in very minute quantity; and its variable propor- 
tion sufficiently shows, that the hydrogen which forms it does 
not come from the substance. Iam induced to believe that it 
is derived from moisture adhering to the phosphorus. The ac+ 
tion of iodine on phosphorus shows, that it is very difficult to dry 
the latter substance perfectly. 
A stick of phosphorus put into the alcoholic or ethereal solu- 
tion of the perchloride did not exert any action upon it. 
Charcoal heated in the vapour of the substance appears to 
have no action upon it. 
Most 
