& * 
—— a 
S, o 
St ae 
oc. aes 
50 "Cornus florida: 
ihe addition of the acid, Dr. Walker inferred that the want of trans- 
3 eta in the sores pom ae was not agin owing to the pre- 
“ny the tale of colour noticed above, was owing to the carbona- 
tion of these particles by the acid.”* The Cornus florida contains 
more extract t and —_—* than pre hermes nr and ism more e soluble in 
‘he seit of the bark of Cornus florida i is more mis- 
bl om ian that of the Cinchona, for the same reason.t ~ 
So bebe rom a summary of Dr.-Walker’s experiments, that 
= Dogwood and Peruvian Bark possess the same ingredients: 
eu mucilage, and extract ; and that the last contains the gallic acid, 
oug 1 in different proportions. The Dogwood possesses 
: Sir 1, mucilage and extract; and the Peruvian Bark, 
the most resin. The extract and resin possess all their active vir- 
tues ; the extract all their tonic power. ‘The resin when separated 
from the extract is stimulant only ; and probably the tonic powe 
ar of 
the extract is increased, when combined with a portion of the resin, 
ey pe as pie Sa *: 5 Bs a gg of . 
MEDICAL PROPERTIES, 
The similarity between the Dogwood and the Peruvian bark, in 
their = ame, their chemical = and their action on 
ie 
~tomgueli Ue: p- "ss + Ibid. p. 28. Ibid. p. 29. 
P 7 ) 
ee 
