g 6 ^ Treatise on 
being feparated from the Blood, it falls primarily 
and immediately upon the nervous Syftem ; And 
hence arife thofe Symptoms which are perceived in 
the Beginning of the Fever ; to wit, a Coldnefs, 
Languor, Fainting, Inquietude, Shivering, Stiff- 
nefs. Pandiculation, Giddinefs, Spafmodick Pains, 
a weak Pulfe, with Heat, Third:, and Drynefs of 
the Tongue. In the next Place, its Force is exerted 
fecondarily and mediately upon the Humours ; for 
as much as the whole Oeconomy of the Blood is 
regulated by the due Ofcillations of the nervous 
Fibres. The ofcillatory Motion of the Nerves be- 
ing interrupted, there follows a retarded Motion of 
the Blood and Juices, and the ordinary Secretions 
are fupprefled. But where the Strength of Con- 
futation is fufficient for fuftaining this Impetus , 
the Vifcidity, and flow Progrefs, of the Blood in 
Veffels occafion the whole nervous Syftem to be 
immediately moved and fhook, and to recover 
its Ofcillations with fo much Vehemence, that in a 
Ihort Time an univerfal Heat is diffufed over the 
Body, the retarded Circulation of the Blood is re- 
ftored, and the Lentor, which had been contracted 
by its Slownefs, is diftolved. By thefe Succuftions 
alfo the noxious Humour, which is impacted up- 
on the Nerves, is repelled, and caft out of the 
Habit in Sweat, or by fome other Excretion either 
fenfible or infenfible ; or being depofited on fome 
Part of the Body, as the Lips, Noftrils, &V. pro- 
duces different Sorts of Eruptions, Puftules, red 
or purple Spots, or Buboes in the Groin and Arm- 
pits *, and in other Parts Carbuncles, Boils, Tu- 
mours, Abfceftes, and various Kinds of Ulcers. 
The Peruvian Bark does not extinguish malig- 
nant and peftilential Fevers, or at leaft not without 
great Difficulty. But in intermitting and continual 
Fevers, provided it be properly given, it cures with 
Speed 
