98 SANGUINARIA €ANADENSIS. 
a colour from the remainder. Aither receives 
from the root a yellowish colour, and when eya- 
porated, leaves the resin nearly pure. In this 
state it is moderately adhesive, of a deep orange 
colour, bitter and acrid, diffusible, but not soluble 
in water, The resin may also be precipitated in 
small quantities from alcohol by water. 
2. A bitter principle. Both water and alcohol 
acquire a strong bitter taste when digested on the 
root. From both these solutions a copious pre- 
cipitate is thrown down by the nitrate of silver 
and the acetite of lead. Muriate of tin gradually 
renders the solution turbid, but without a precipi- 
tate. Oxymuriatie acid renders the alcoholic so- 
lution turbid, but produces no change in the wa- 
tery solution for some time. At length a precip- 
itate forms and slowly subsides ; but produces no 
change in the watery solution. No precipitate was 
formed from the cold aqueous infusion in an hour 
by the sulphuric or nitric acids, by lime water, ni- 
trate of mercury, muriate of barytes, oxalate of 
ammonia, sulphate of iron, gelatine or bydro-sul- 
phuret of potash. After standing twenty four 
hours, a very slight precipitate was discovered 
from the lime water and nitrate of mercury only. 
3. An acrid principle. The acrimony resides 
in part in the resin, but is also communicated to 
