ON CINCHONA. 329 
Red Cinchonic. 
Gum. 
Amylum. 
Kinate of Lime. 
Lignin. 
Various experiments have been made to ascertain the quan- 
tities of Quinia and Cinchonia present. The following are 
the results of Goebel and Kirst: 
Quinia. Cinchonia. 
lib. hard Carthagena bark ... 56 grs. 43 grs. 
lib. fibrous Carthagena bark . . 54 grs. no trace. 
If this analysis be correct, it certainly shows a remarkable 
distinction between the two kinds. 
3. Cusco Bark. 
This bark has only been known during the last seven years. 
It is the Ecorce d'Jirica of Pelletier, and China rubiginosa 
of Bergen; but it is not described in the monograph of this 
last writer. It is characterized by a white, smooth, uncracked 
epidermis; which, however, is sometimes partially or wholly 
removed by the orange red tint of the other parts of the bark, 
by its fibrous appearance, and lastly, by an infusion of it not 
precipitating a solution of the sulphate of soda. This bark 
principally deserves notice in consequence of MM. Pelletier 
and Coriol having discovered in it a new T alkali, which they 
have termed Aricina. 
(c.) Red Barks with a White Epidermis. 
4. Cinchona Nova. 
History and synonymes. — The Quinquina nova is plac- 
ed by Guibourt among the false Cinchonas, though I know 
not for what reason, since he asserts it is the red bark of 
Mutis, which is obtained from the Cinchona oblongijolia. In 
speaking of the origin of ihe red bark of commerce, I have 
already mentioned that Bergen declares the Quina roxa (ob- 
tained from C. oblongifolia) of Ruiz's collection, to be the 
Quinquina nova of commerce. On these grounds, then, I 
VOL. V. NO. IV. 42 
