Chimaphila umbellata. 21 
_ CHEMICAL ANALYSIS, 
From the chemical analysis of. this + as made * Dr. John 
Mitchell,* it appears that the decoction strikes a black colour with 
the sulphate of iron ; and. that there is | pie or no difference in the 
quantity of astringency in . the lcavetee nd in te KS. The pro- 
portions of gum and resin contained in the plant ‘are, accor or 
Dr. Mitchell’s experiments, as follow: 1. Upon adding ficohol to 
half an ounce of the dried leaves, and suffering the mixture to stand 
for twenty-four hours exposed to a moderate temperature, then fil- 
tering and evaporating to dryness, a residuum weighing. eighty-six 
grains was obtained. By the addition of water to this residuum, 
nineteen grains of gum were procured. -2dly. ‘Upon adding water 
to half an ounce of the powdered leaves, ‘andAetting the mixture re- 
main quiescent for twenty-four hours, expaeen. to the same , Serer 
of heat as in the first es peri 
evaporating it to dechede ; a resit w 
eight grains. By the addition of alcohol, pe ys grains of resin 
were procured from this remaining powder. 
.* 
: x 
* MEDICAL PROPERTIES. ~* “syc 2°" > 
r cs os aes fi Fe : i ie ; . og ; ‘ rc pe = jets se = 
This mints rincipally entitled'to the attention of physicians, 
for its diuretic property ; ; for swhacll it is now sought and used by 
* Inaugural Dissertation, Un. Penn. 1803. 
