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Selected Articles. 
whilst at the present day we are fully satisfied that the fluid 
in question may owe its physiological properties to the pre- 
sence of a small quantity of creosote. 
Extracts. — The formula of the older pharmaceutists, al- 
ready alluded to, those of Hombert, Diest, Baume, Josse, 
Limousin Lamothe, Cartheuser, Crohare, and finally, that of 
Cornet, which is now adopted, and consists of several times 
macerating for thirty-six to forty-eight hours, opium of com- 
merce, in six times its weight of cold water, filtering, evapo- 
rating, redissolving the product when reduced to the state of 
a soft extract in eight parts of cold water ; again filtering 
and evaporating three different times, appear to me to fur- 
nish aqueous extracts, containing the various articles found 
in that analized by M. Pelletier, namely, acid meconate of 
morphine, meconine, narceine, gum, narcotine, resin, oily 
matter, brown acid colouring matter. 
I would add: volatile virous principle, acid meconate of 
codeine, discovered since the analysis of M. Pelletier, sul- 
phate of morphine, sulphate of potash, and sulphate of lime. 
The residue is therefore composed of : a little brown acid 
extractive matter, which is never wholly taken up by the 
water, a little gum, a large proportion of the virous prin- 
ciple, of the narcotine, fatty matter, resinous matter and sul- 
phate of lime, all the caoutchouc, bassorine and vegetable 
fibre. 
But it should be remarked, that in these different extracts, 
the soluble principles must not be expected to be always 
found in equal proportions. For example, the narcotine, re- 
sin and fatty matter appear to be more abundant in extracts 
made by means of hot water, than in those in which cold 
water has been used ; in extracts made by treating the opium 
by small quantities of water at a time, than in those made 
with a large proportion of water ; in extracts made by sim- 
ple evaporation than in those by successive solutions and 
evaporations. The cause of this is, first, that the presence of 
a large proportion of the soluble principles of opium favours 
the solution of principles which; in themselves, are but 
slightly, or not at all soluble ; second, that this solubility is also 
