and Alcohol with volatile Oils. 453 
of the acid. The greater the quantity of camphor, the less is 
the portion of acid remaining with the water; the latter con- 
tains also a small quantity of camphor, but that which water 
cannot separate: this quantity of camphor ought to be nearly 
the same as that which remains in the acidulated water, when 
oil of camphor is decomposed by water. ) 
These effects are not confined to greasy bodies and to acids ;. 
they occur equally between alcohol and these same greasy bo- 
dies. 
Having long ago been applied to by the Regie des Octrois de 
Paris, to know whether it be possible to introduce under colour 
of essences, turpentine for example, a certain quantity of alco- 
hol (a fraud which can only be effected by the manufacturers of 
varnishes), 1 made on this subject some experiments, which 
proved to me that a certain quantity of alcohol can be mixed: 
with essences, withcut our being able to detect it by the ordinary 
means, because, as long as the bulk of alcohol does not exceed 
that of oil, the mixture or combination will not be disturbed by 
water, and the odour will be masked by that of the essence which 
is strongest. 
I have repeated lately some of these experiments; the fol- 
lowing are the results: 
Exp. 1.—100 parts of volatile oil of turpentine and 20 parts 
of alcohol mixed together, did not separate on being left to set- 
tle, and formed a homogeneous body : this effect is produced by 
the solution of the alcohol in the oil ; for one portion of alcohol 
cannot dissolve five parts of oil. 
Exp. 2.—The above mixture, shaken for a long time, and at 
intervals with water added, was reduced to 108. The water 
had therefore abstracted 12 parts of alcohol from the oil, and 
the oil had preserved 8. 
Oil of turpentine may therefore contain a twelfth of its bulk 
of alcohol without its being liable to be perceived, unless it be 
through the specific gravity, which is a little diminished: how- 
ever, if the lotions are repeated enough, the whole of the alcohol 
may be at last separated from the oil. 
The mixture or combination of 100 parts of oil of turpentine, 
and 20 parts of alcohol, is not disturbed by water; but when 
poured upon water and slightly agitated, a portion of the alcohol 
will be seen to detach itself,and to form, in uniting with the 
water, some very marked streaks. 
7 
XCIII, No- 
