I 
300 CHEMICAL REMARKS ON CASCARILLA. 
nine and strychnia ; but it abundantly precipitates the five 
others as soon as the acid has been neutralised by ammo- 
nia ; it must be noticed, however, that an excess of this last 
base re-dissolves the tannate of brucia. 
Besides this, we find, and this appears to me to be 
worthy of attention, that of the two bases which are met 
with in the same plant, one is constantly protected by tarta- 
ric acid, while the other is not : the employment of this 
method is valuable, because it allows us to separate the 
two bases with the greatest precision. — Ibid, from Comp. 
Rendus. 
ART. LXXXIV.— CHEMICAL REMARKS ON CASCARILLA. 
By A. Duval. 
After giving a brief history of this substance, and de- 
tailing the analyses of it made by Boulduc, Boehmer, 
Trommsdorf, Caventou, and Felix Cadet, the author pro- 
ceeds to give an account of his own analysis. He says, the 
following are the principal substances I have found in the 
officinal cascarilla : — Albumen, a peculiar kind of tannine, a 
bitter crystallizabie principle (cascarilline,) red colouring 
matter,* fatty matter having a nauseous odour, wax, gum- 
my matter, volatile oil (this has an agreeable odour and a 
spec. grav. of 9*938,) resin, starch, pecticacid, chloride of 
potassium, calcareous salts and woody fibre. 
The most interesting of these principles is the bitter one. 
My process for extracting it is as follows: — I first select a 
* This is insoluble in aether, but it is soluble in alcohol, to which it 
imparts a fine purple colour. It readily dissolves also in water con- 
taining an alkali. 
