98 yf Treatise 
ficient Time, it not only changes the febrile Hu- 
mour and ftrengthens the Fibres, but likewife, 
when the noxious Humour is entirely fubdued, 
expels it out of the Body through fome Emunc- 
tory or other. Thus, when the Bowels have re- 
covered their Tone, they then begin to perform 
their Functions. The fuperfluous Juices which 
loaded them are excreted, either by Stool, or by 
Urine, or by Sweat, or by infenfible Perfpiration * 
fo that the Bark often anfwers the Ends of a Ca- 
thartick, a Diuretick, a Sudoriiick, or a Diapho- 
retick. That it is unable to corredl the Malignity 
of peflilential Fevers, or not at leaf!:, as we have 
faid, but with great Difficulty, is by Reafon that 
the antecedent Caufe of fuch Fevers is not a Lax- 
nefs and Flaccidity of the Fibres, as in intermit- 
tents, but an Erithifm or Crifpation of them, which 
the Bark has not a fufficient Efficacy to allay. The 
Medicines indicated in this Cafe are the more pow- 
erful Cardiacks as the finer acid Salts in Combi- 
nation with oily Particles ; in order not only to 
break the Force of the thick and extremely cauftick 
febrile Venom, but alfo to attenuate its more grofs 
and fixed Salts, and fo to volatilize them, as it 
were, that they may more eafily exhale through 
the cutaneous Pores j and that the folid Fibres, 
which are lhook inordinately and with great Vio- 
lence, may be gently flimulated, and at length re- 
duced to an equable Vibration. In this Manner 
the vitiated or envenomed Juices, being fubdued 
and feparated from the Blood, will be excreted 
through the Pores of the Skin, or other Emiffia- 
ries of the Body ; or at leaft, as it fometimes hap- 
pens, will be thrown out upon fome lefs noble 
Part. 
[Befides the Properties of the Peruvian Bark 
enumerated above, we have fome Accounts in the 
Medical 
