i tnses 
_ of heat, and a diminution of the original volume 
_ after the mixture of two liquids has become cool; but no brom- 
Rrentgldsideid obdhe Acetate of Ethyl. - 43 
HO, and is a reaction which of late has attracted the attention 
of chemists. ; 
In the case of the body, C,H,BrO,, which I hoped to obtain 
from the acetate of ethyl, it was a question of some interest to 
determine whether this reaction would be represented by the 
first or the second of the two following equations: 
Glycol. Acetate of Silver. 
C,H,O C,H C,H,0 
L C2 y pO tAg20+H0= 24102243 OF ARBr; 
bgt prt Alcohol. 
©,H,BrO Ea aN oF : 
Il. OH "0-+Ag,0-+H,0= *agcet 27,°O-+AgBr: 
in other words, whether the bromine had been substituted for 
Acetete of ethyl. 
C,H,0,+2Br=C,H,BrO,+-HBr. 
The reaction of bromine proved, however, to be entirely differ- 
No product 
-ent from that of chlorine on the acetate of ethy 
of substitution was formed, and therefore the question proposed 
ve could not be resolved; but the results which I obtained 
in making the experiment possess sufficient interest to induce 
_ me to publish them. 
romine dissolves in the acetate of ethyl with sor ee 
es place 
hydric acid is disengaged, and the mixture, even after it has 
been exposed to the diffuse light in the laboratory for several 
weeks, when distilled, passes over mostly between 60° and 80° C., 
and can be separated, by washing with a dilute alkaline solution, 
- into bromine and acetate of ethyl unchanged. 
f, however, one molecule of acetate of ethyl and two equiv- 
_ alents of bromine are heated together in a glass tube y 
_ drawing the end to a point and melting it with the blast lamp, 
_ the color of the bromine disappears almost immediately at a 
_ temperature of 150°, or after twelve to twenty hours at 106°. 
_ No bromhydric acid is disengaged on opening the tube, and the 
_ liquid contains only a small quantity in solution, which is given 
- 
