the compounds of chromium. 199 
silver had subsided, the residual liquid was neither affected by 
common salt nor by nitrate of silver. 
From this analysis it is clear, that the red liquid is a com- 
pound of 1 atom chromic acid, and 1 atom chlorine, and that 
its atomic weight is 1 1 . 
From an experiment formerly given, it is easy to deduce 
that 11 grains of the red liquid contain likewise o - o866 grain 
of green oxide of chromium, doubtless, from the sweet taste 
of the liquid, held in solution by chlorine or muriatic acid. It 
would seem at first sight that this quantity, not taken into 
consideration in the analysis, vitiates the whole of the con- 
clusions. But from the length of time taken up in weighing 
the liquid, I have no doubt that just as much moisture evapo- 
rated as this increase amounts to. The reader will observe, 
that the amount of green oxide is less than 1 per cent of the 
whole. 
As this liquid possesses acid properties, I have given it the 
name of chloro-chromic acid. Water having the property of 
decomposing it, we have scarcely the means of trying whether 
it be capable of uniting with bases. The few trials which I 
made were not attended with success. 
This body, so liquid and so volatile, is a compound of a 
solid and a gas. One cubic inch of chloro-chromic acid 
contains 259-22 inches of chlorine gas. Thus the gaseous 
particles are about times nearer each other than when 
they are in the gaseous state. This, together with the 
looseness of the combination, accounts for the abominable 
smell which distinguishes this liquid. 
100 grains of the acid contain very nearly 41 grains, or 
gif cubic inches of chlorine. 
