160 EXAMINATION OF THE BARK OF MONESIA. 
Boutron Charlard, from the bark of the Quillaia saponaria, an 
acrid matter, which, to a certain extent, presents an analogy 
with saponine. (Journ. de Pharmacie.) 
Malate of Lime. 
We have stated previously, that the hydrochloric tincture 
of Monesia allowed to deposit, at the end of some time, a 
pretty abundant rose colored or whitish precipitate. Desirous 
of knowing the nature of this deposit, we in the first place 
boiled it with alcohol, at 35°, to deprive it of all coloring mat- 
ter. It was then drained and dried, when it was treated with 
warm water sharpened with sulphuric acid; after proper boil- 
ing, a little animal black was added; it was filtered, boiling, and 
the half of the liquid, when evaporated, left, with sulphate of 
lime, a white salt, which was destroyed by calcination in the 
atmosphere, leaving a little carbon and carbonate of lime; the 
other half, by the addition of acetate of lead in sufficient quan- 
tity, furnished, cold, a white precipitate. This precipitate, 
washed and drained, boiled with water, and filtered boiling, 
afforded, by evaporation, small needle-shaped crystals, recog- 
nised as malate of lead. 
This salt, brought in contact with sulphuret of barium, dis- 
solved in water, gave rise to sulphuret of lead and a liquid, 
from which was obtained, by means of the careful addition of 
sulphuric acid, the malic acid with its characteristic proper- 
ties. 
Treatment by Water. 
After finishing with ether and alcohol, we submitted the 
bark, in great part exhausted of its principles, to the action of 
distilled boiling water; the fluid, however, still removed some 
red coloring matter, traces of tannin, of acrid matter, glycyr- 
rhizine, &c, but no fecula. The liquid contained gum, or a 
principle of this kind, and some salts of potassa, as the sul- 
phate, chloride, and malate. 
