166 C. M. Warren on a new process, etc, 
bath reached 170°. Slight carbonization occurred just at the 
close of the combustion, from extending the heat backward too 
soon, under a wrong impression that the substance was all burnt. 
Were it not for this circumstance, it is believed that this would 
have been a good analysis, although the temperature of the air- 
bath was kept so low. That a higher temperature of the bath 
is desirable, however, is shown by the fact that the chlorid of 
copper appeared diffused over a space of 24 inches. The length 
of the column of mixed asbestos and oxyd of copper was only 
four inches in this experiment, containing but one gram of the 
oxyd. 
Results of the Analysis—0°1568 gram of chlorid of amyl gave 
0°3195 of carbonic acid, and 0°1522 of water. 
Calculated. Found. 
Carbon C 60 56-3910 55574 
Hydrogen Ha, 11 10°3383 10°784 
Chlorine Cl 854 83-2707 
Analysis 5.—The oxyd of copper employed was of the same 
preparation as that of analyses 3 and 4. The temperature of the 
air-bath, however, was considerably higher, ranging from 240° 
to 247°. The mixture of asbestos and oxyd of copper occupied 
a space of five inches in length, but contained only two grams of 
the oxyd. At the close of the combustion there was no appear- 
ance of chlorid of copper, except at the back end of the column, 
a space # of an inch in length. 
fesults of the Analysis—0°1631 gram of chlorid of amyl gave 
gt of carbonic acid, 0°1557 of water, and 0-2157 of chlorid 
of silver. 
Calculated. Found. 
Carbon Ci 6 60 56-3910 56542 
Hydrogen H,, 11 10°3383 10°607 
Chlorine = Cl 35°4 =. 33-2707 32-649 
100° 99°798 
t bestos ; hence 1 
is obvious that but little of a solvent is needed to extract the 
chlorid. In this respect the new process bears a striking contrast 
to the old one, which inyolves the use of a large quantity of 
Time, necessitating a corresponding quantity of acid, and intro- 
ducing disagreeable manipulation, which tend to increase the 
liability to error. 
I have not yet tried the process recently described by Carius," 
* Annalen der Chimie und Pharmacie. 
