292 MEDICAL HISTORY or THE 
removed, the ftomach and bowels braced up, and, by the 
interpofition of opiates, the fpafms were removed. 
Having fent feveral fpecimens of the bark for a trial 
to different parts of the continent of America, and parti- 
cularly to my worthy friend Door Hall of Peteriburgh 
Virginia, I impatiently wait the refult of your trials, and 
will efteem myfelf particularly obliged by your commu- 
nication. If you chufe, I fhall fend you fome of the 
young trees planted in tubs, with fome of the feeds. 
Should it be found to anfwer my expectation, the plea- 
fure refulting from the thoughts of having communicat- 
ed fomething ufeful, will be to me ample enough recom- 
penfe. Ihave the honor to be, 
With the utmoft refpect, 
Your moft obedient humble fervant, 
GEORGE DAVIDSON. 
P.S. Dr. Wright of Jamaica (in fifth vol. of medical 
commentaries,) defcribes a {fpecies of Cinchona, with only 
one flower on a footftalk; the fame was likewife found at 
the Havanna. It differs in that particular from the old 
bark, which refembles the St. Lucia bark, in having feve- 
ral flowers on each footftalk. 
The following is a Defcription of the CINCHONA CaRI- 
BEA SANCT#& Luciz. 
The tree is commonly found in ravines, near fprings, 
under the fhade of a larger tree. It delights in places well 
fhaded, and defended from .the north-eaft trade wind. 
The foil is commonly a ftiff red earth with a clayey fub- 
ftratum ; quantities of {mall beautiful chryftals, of a regu- 
lar angular form, are found intermixed. 
The tree is about the fize of the cherry tree; feldom 
exceeding the thicknefs of the thigh, and twenty-five feet 
in height. 
The 
