Foreign Vegetables. 8i 
chiefly to be accounted for from the Exhalation of 
the Oil, the Particles of Earth and Salt, which 
were carried off therewith, bearing but a fmali 
Proportion to it. This Mixture of acid Salt and 
Oil conftitutes a Refin, which may be obtained, by 
the Affiftance of a proper Menftruum , in a Quanti- 
ty almoft equal to a fourth Part of the Bark : But 
the Proportion of Gum is vaftly lefs. To this we 
may add, that an Infufion of the Bark turns blue 
Paper reddiffi : Whence it is evident, that among 
its oily Parts it greatly abounds with acid Salts, 
and that its Energy is, in a great Meafure, owing 
to them. 
The Peruvian Bark is reckoned, with other Bit- 
ters, in the Number of Stomachicks. It flrength- 
ens the Stomach, raifes the Appetite, helps Digef- 
tion, difcufles Wind, kills Worms, and provokes 
Urine and the Menfes : But it is chiefly to be ex- 
tolled on Account of its Virtue in conquering in- 
termitting Fevers ; for provided it be properly ad- 
miniftered, it cures them with Safety and Speed, 
and without creating Difguft in the Patient. The 
Dofe in Powder is from gfs. to gij. either mixed 
withfome Liquor, or made into a Bolus with Syrup. 
An Infufion thereof, in the Proportion of §j. to 
ibj. of red Wine, may be given to £vj. as may 
likewife a Decodion of it in Water, allowing 3-j. of 
the Bark to fbifs. of Water, and boiling till the 
third Part is evaporated. Sometimes, in Compli- 
ance with the Loathing of the Sick, this Decodion 
is ordered by Way of Clyfter, to the Quantity of 
Ibj. for grown up Perfons, and to ffefs. for Chil- 
dren. But, in Regard to thefe feveral Ways of 
prefcribing it, we mud take Notice that it is more 
efficacious in Powder than in Decodion or Infufi- 
on ; and that the Infufion in Wine is much better, 
than an Infufion or Decoction in an aqueous Men- 
G Jlruum 
