156 
EXAMINATION OF THE BARK OF MONESIA. 
this menstruum removed the sugary matter, which we regard 
as glycyrrhizine, and which remained, after filtering and eva- 
poration, under the form of a dry matter, reducible to a 
slightly reddish powder. 
Alcoholic Treatment. 
To the action of sulphuric ether we made succeed that of 
hot alcohol at 30° ; the clear liquid obtained was permitted 
to stand some days in a closed vessel, when it afforded a pow- 
dery precipitate of a rosy white; this was collected and im- 
mediately examined. 
The alcoholic tincture was sensibly acid to blue paper, of 
a deep brown color, like the solutions of catechu and kino; 
its taste in the first instance was styptic, then bitter, and very 
acrid to the throat. 
After distillation, pushed to dryness, we had as a residue a 
deep brown extract, very dry and friable, affording a dull 
brick dust red powder; this extract, when treated with cold 
water, was completely dissolved, with the exception of some 
flocks of brown apothema. The filtered liquid, tested by re- 
agents, gave the following reactions. 
1. With gelatine an abundant precipitate, without complete 
decoloration. 
2. With tartar emetic a flocculose precipitate, idem. 
3. With sulphate of iron a bluish black precipitate. 
4. With potassa and ammonia a reddish brown gelatinous 
precipitate. 
5. With the acids the liquid assumes a color somewhat red- 
dish. 
6. With lime and baryta a precipitate is formed, of gelati- 
nous consistence, and reddish. 
7. With acetate of lead, the same. 
A portion (A) of the extract was weighed with care in a 
state of dryness, then dissolved in distilled water and filtered; 
there remained upon the filter a small quantity of brown 
powder, again the apothema of tannin. In the clear reddish 
