Frasera Walteri. 109 
case with the columbo. Its spirituous tincture suffers decomposition 
upon the addition of water, indicating that it contains resin, which 
the columbo does not, at least in any considerable quantity ; and the 
addition of a decoction or tincture of galls to its watery or spirituous 
infusion, causes no precipitate of cinchonin, one of the chief consti- 
tuents of columbo.”’*. (For further chemical results, see Appendix.) 
MEDICINAL PROPERTIES. 
The root of Frasera is a pure, powerful and excellent bitter, desti- 
tute of aroma. It is said to be not at all inferior to the gentian or 
columbo of the shops, and is equal to any of the common tonic bit- 
ters used in medicine. In its recent state it is said to possess consi- 
derable emetic and cathartic powers.+ I have been informed that it is 
extensively used in the western states, and that it supports its repu- 
tation wherever it is generally known. I have never used tlie plant 
in any way, and consequently can say nothing from experience on 
the subject. The late Proféssor Barton shewed me some slices of the 
dried root several years ago, but the quantity he possessed was not 
sufficient to enable him to make any extensive trials with’ it. It may 
be used in powder, decoction, infusion, and tincture. 
* Picture of Cincinnati. + Ibid. 
