ligneous Part of Gray Ipecacuanha. V5 
An equal quantity of the cortical part yielded by the 
medium of rectified alcohol six decigrammes of resin. 
This same part of the root in the same quantity, digested 
in 200 grammes of distilled water, furnished by evaporation 
a dry extract weighing one gramme eight decigrammes. 
This extract is entirely soluble in water, of a citrine colour, 
and of a slightly biiter taste. 
Lastly, the same substance, treated by boiling water in 
the same proportions, yielded a greater quantity of extrac 
tive matter’by nearly two grammes five decigrammes. 
I now operated upon the ligneous part in the same man- 
ner with the same agents, and I obtained the following re- 
sults : 
Ist, By the sulphuric ether, three decigrammes of resin. 
2d, By rectified alcohol, two decigrammes five centi- 
grammes of resin. 
3d, By cold water, one gramme four decigrammes of dry 
extract, 
4th, By boiling water, two grammes and eight decigram- 
mes of extractive matter. 
It often happens that alcohol dissolves more soluble matter 
than ether ; this diflerence is owing to the fluid taking off 
with the resin a small quantity of extract, but it is easy to 
separate it. 
In order to ascertain which of those two parts excited 
vomiting, or if both of them had equally an emetic and 
purgative property, I tried each of them separately in the 
hospitals of Paris. 
From the observations of medical practitioners it results 
that the resinous part, in a dose of four grains, possesses a 
decisive emetic and purgative property. 
The method of administering it consists in mixing the 
resin with a small quantity of sugar, and adding thirty or 
fifty grammes of water. 
As to the extractive part, the effects were the same ; but 
the dose was greater, namely, about six or eight grains. 
After this short explanation it is easy to see, that if the 
cortical part of the root of ipecacuanha and the ligneous part 
both contain the same principles, they should enjoy the 
same 
