ng a tube about the cir- _ 
$00s' nd from 6 inches to 14 foot 
in length. It is of a colour on the exterior, and 
si er h small transy fiss or cracks; interior 
i oth, and, in or good bark, of a bright 
of a compact texture, and breaks with a short 
acture. It is the bark of the cinchona condaminia, 
known spvaede 4 e name of cascarilla fina. Yet, 
= ae this bar: appears to have held the decided 
- preference to: 1 other species, analysis fully indicates that 
“at is not equal in medicinal strength, by at least 25 per 
“cent, to that denominated calisaya. This bark is more 
astringent, and less bitter, than the calisaya. Yields from 
25 to 30 per cent. less cinchonine and quinine than the 
ealisaya arrollenda does quinine—and the proportion of 
_ cinchonine is much greater than the quinine. 
" CINCHONA OBLONGIFOLIA—2 varieties : 
1. Colorada canan, or Quill Red Bark, which occurs in quills 
of various diameters, from 3 of an inch to 2 inches in thick- 
ness; epidermis white or grey, with transversal fissures or 
_ warty concretions, of a reddish colour; interior of a brick- _ 
_ red colour; the cross fracture short and fibrous, the longi- 
tudinal fracture compact and shining. ‘Taste not so bitter _ 
as the calisaya. " 
Colorada Plancha, or flat Red Bark. In very large | hick — 
pieces, from 4 to 2 inches in thickness, and from 1 to 2 
feet in length; epidermis brown, thick, and rugged, with 
etacks running in various directions; fracture very fibrous; 
inside of a deep brick colour. Taste less bitter than the 
Quill, and of course much less than the calisayu. 
ts 
. 
These two varieties frequently come in the same seroon, and 
from their appearance, are no doubt: the product of the 
same species, or perhaps the same tree—the quill produc- 
ed by the branches, and the flat thick pieces from the 
trunk; or the former from young, and the latter from old- 
_ This bark is generally more scarce in our market than the 
yellow or pale, and commands a higiier price. 
From experiments on the above bark, I procured 20 per 
Sent. less cinchonine and quinine in combination of quan- 
tity, than the amount of quinine produced by the same 
Quantity of calisaya arrollenda bark—and the proportion 
_ OF einchonine was rather miore than half of the product of 
umine. It will appear, therefore, that notwithst din 
‘reat prejudices both of eminent authors and skilful 
