164 C. M. Warren on a new process 
slightly milky; this may, therefore, be taken as about the tem- 
perature at which chlorid of copper begins to suffer decomposi- 
tion. At 267°, a solution of nitrate of silver was instantly pre- 
cipitated. 
Thinking that perhaps the small quantity of chlorine evolved 
under these circumstances might be taken up again and retained 
if oxyd of copper were present, and possibly, also, that in that 
case a higher temperature might be safely employed,—to make 
the conditions of the experiment conform in this particular to 
those which exist in an analysis, all but one inch of the chlorid 
of copper was removed from the tube, and in its place was 
put a mixture of asbestos and oxyd of copper, occupying a space 
of four inches in length, forward of the chlorid. The experi- 
ment was then repeated. Prolonged heating in a current of air, 
and afterwards in oxygen, during which the thermometer rose 
to 350°, produced no reaction with nitrate of silver. From this 
the combustion there was no appearance of chlorid of copper, 
except in the first half-inch at the back end of the column of 
the mixture of oxyd of copper and asbestos; showing that the 
temperature employed was favorable for rapid and complete ab- 
sorption of the chlorine. 
lis of the Analysis.—0°1682 gram of chlorid of amyl gave © 
wee of carbonic acid, 0°1633 of water, and 0°2233 of chlorid 
of silver. 
Calculated. Found. 
Carbon C€,, 60 563910 56-522 
Hydrogen H,, 11 103383 10-761 
Chlorine Cl 35°4 33°2707 82°773 
100 109-056 
- 
_ Analysis 2.—The oxyd of copper employed was of the same 
preparation as that used in Analysis 1. The space occupied by 
the mixture of asbestos and oxyd of copper was only 34 inches 
in length, but contained the same quantity, viz. 5 grams of 
the oxyd of copper, as used in the previous analysis. The tem- 
perature of the air-bath ranged from 250° to 253°. At the close 
