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ON RESINEONE OF TAR. 
Without adopting this conclusion, which could only be 
the result of numerous experiments, it may be well to call 
to mind a very old experiment of Dr. Vogel, sen., in which 
phosphorus, exposed to complete isolation in hydrogen gas 
or in vacuo was converted into a red body analogous to the 
oxide of this body. 
Ibid, from Journ de Pharm. 
ART. LX. — RESINEONE OF TAR A THERAPEUTICAL AGENT. 
By Dr. Peraire. 
Dr. Peraire, knowing long ago that tar is an efficacious 
therapeutical agent, but that owing to its being disliked by 
most patients, it acquired only little reputation in medicine, 
he contrived to separate from this body, so disagreeable in 
taste and odour, the active matter, which may easily be 
employed. The important researches of M. Fremy (Jiiin- 
de Chimie et de Physiq. vol. lix.) paved the way for M° 
Peraire. This distinguished physician, however, experi- 
mented with the tar itself, and not with the resin. The 
process which he adopled is as follows: — 
It is known that on distilling tar, either with water or 
unmixed, an oil is obtained, which is called oil of cade. 
M. Peraire subjected this product to a fresh distillation, and 
the results were nearly the same which M. Fremy obtained 
from the resin. 
Previous to commencing the operation, a fragment of 
potassa is put into the oil of cade, to saturate any acids 
present. On placing the mixtnre in a retort, and applying 
heat, it behaves in the following manner: — Like the resin, 
the tar boils at 158° F., and on distillation a colourless oil 
