ON VEGETABLE CHEMISTRY. 
331 
dark brown color immediately resulted, which had every ap- 
pearance of malate of iron. 
The second portion was treated with acetate of lead until it 
ceased to occasion any turbidity. When the deposition was 
completed, a little more water was added, and the mixture 
heated to ebullition. After boiling for two or three minutes 
the whole of the precipitate was redissolved; it was then fil- 
tered, and set aside to cool. In about an hour, the inside of 
the glass displayed a beautiful arrangement of minute crystals 
of extreme whiteness. These crystals were collected, dried 
on bibulous paper, diffused through distilled water, and then 
decomposed by sulphuric acid. The sulphate of lead was al- 
lowed to settle, and the liquid, after filtration, was tested with 
sulphate of iron, when the characteristic brown color again 
resulted. 
The third portion w T as tested with nitrate of silver. On the 
addition of this salt a darkish precipitate was obtained, soluble 
in boiling water, out of which it crystallized on cooling in 
shapeless particles that were nearly black from the reduction 
of oxide of silver. 
The fourth part, by digestion in nitric acid, on a sand bath, 
and a heat of 130°, was totally converted into oxalic acid. 
The residue left by the alcohol, indicating no traces of 
acidity, was boiled in repeated portions of distilled water, un- 
til all the soluble matter was removed. The solutions, after 
being mixed and concentrated, were suffered to cool, when a 
small quantity of bitartrate of potass was deposited, and the 
liquid on examination displayed all the characteristics of 
gum. 
The matter left by the boiling water was small in quantity, 
soluble in liquor potassae, and, to all appearance lignin. 
Experiment 2. — Some gooseberries were gathered before 
they were fully ripe, having a bright red instead of a deep 
claret hue, and after due crushing were boiled in repeated 
portions of strong alcohol. The alcoholic solutions were in- 
termixed, allowed spontaneously to evaporate, and the residual 
matter redissolved in distilled water. Acetate of lead was 
