their uncertainty ; ana communicates the Receipt of a 
Powder, with which he hath cur'd (bme Intermittents, 
which would not yield to the Cortex Peruv. which Cor- 
tex he conftders in two whole Chapters. 
Inthefirftof which is contain'd the Natural Hiftory 
of this Bark, the Name of the Tree, the time of its 
coming into uft in Europe, and how the Europeans came 
to the knowledge of it. It feems it met with great op- 
pofition when it was firft brought into ufe at London ; . 
and fome Phyficians cry'd it down becaufe it performed 
the Cure (as they thought ) too foon; others, becaufe 
they could not reconcile the manner of its Operation 
to their Hypothefis and Do&rineof Humours, declaim'd 
againft it as a Medicine too hot or too dry, or fome way 
or other not qualify'd for thepurpofe. Some Foreigners 
indeed defended it, and maintained that it had Qualities, 
fuch as Heat, Tenuity of Parts, &c. by which it might 
well enough effed: the Cure of Agues : But our Author 
concludes, that it cures them, not as it is hot or dry, 
or poflefled of any other Qualities ; to which purpofe 
he gives an Inftance of a Fruit in Sardinia, that hath the 
feme degrees of Heat and Siccity with the Cortex, 
which creates a Tertian as certainly as the Cortex cures 
it ; and therefore the Arguments for or againft the Cor- ! 
tex taken from- its manifeft Qualities, are in his Opinion i 
of no Validity. After he hath anfvver'd the Objections | 
and Cilumnies of abundance of Foreign Authors againft j 
this Medicine, he declares that he hath never in 25* 
years Obfervation feen any ill effeft of the Cortex, on- 
ly a fmaH temporary Deafnefs, which vanifh'd upon the 
Omiffion of the Medicine. But if the Patient hath a 
great Antipathy to the Bark, it lometimes caufes Vomi- 
ting and* Fainting, and Co does Honey, and feveral other! i 
very innocent things when they meet with a peculiar] | 
Idiofyncrafie. The Author confiders in the nexc place, 
how the Cvrfex performs this Cure, and makes it appear 
• tha^ 
• 
