154 EXAMINATION OF THE BARK OF MONES1A. 
We have repeated our first analysis to render it complete; 
the following is the result of our second effort. 
Chemical Analysis. 
Monesia bark in powder, exhausted by water in a displace- 
ment apparatus, affords a liquid of a reddish brown ; acid, as 
regards litmus paper, having a taste at first sugary sweet, then 
styptic, bitter, and very acrid. This liquid affords a pale yel- 
low precipitate with tartar emetic, a grayish brown with ace- 
tate of lead; gelatine forms with it abundant yellow nocculi, 
and the sulphate of iron a bluish black precipitate, like that 
of the substances containing tannin with iron. The liquid 
evaporated by a mild temperature to dryness, left 24 to 25 
per cent, of a reddish brown extract, the appearance of which 
resembled catechu or kino. This extract is soluble in alcohol 
and in water, with the exception of a small quantity of apo- 
thema of tannin, formed during concentration. 
To isolate the different principles contained in Monesia 
bark, we have followed the common method, which consists 
in acting upon it with different menstrua, such as sulphuric 
ether, alcohol, water, hot or cold, acids, &c; and for these 
operations we have employed the displacement apparatus. 
Treatment by Ether. 
Sulphuric ether, after having acted upon the powdered bark 
of Monesia for several days and exhausted it, assumes a 
greenish yellow tint; distilled then to |§ths it leaves a deep 
green residue, which separates from a liquid part, which is yel- 
low and sugary. If this residue be treated with cold water, 
the greenish substance is isolated, which appears formed of 
wax and chlorophylle, besides a crystallizable fatty sub- 
stance. 
Chlorophylle and Wax. 
This chlorophylle has been isolated by aid of cold alcohol, 
or of water slightly alkaline; it was soluble in ether and boil- 
