Cm ) 
pain that is, fometimes, made in the time the Blifter is 
a making. Others, that foms of the Particles of the 
Canthartdes that mix with the Blood, do induce this 
quiet, by a peculiar fort of fermentation they make in 
the Blood. 
I think the naming of thcfe Opinions, is enough to 
Ihow how unlatisfying Accounts we have of them. 
That pain very often brings a Fever, is his own, and the 
Opinion of all the World. And I think, if it is to be 
imagined, that fo coaftant a Cgufe can produce an efFedi 
fo unlike that which does moft commonly attend it ; 
we fliould have had a better Account of the Accident ; 
and fince that is not done, the falfity, and precarious put- 
ting on our underftanding is too evident to require any 
further Confideration. 
The other is as precarious, and quite as unfatisfying, 
tho' not fo falfe, if the matter was well accommodated 
and made the Subject of our Underftanding. All the 
World is full of Fermenting, and every thing is faid to 
Ferment ; and yet what Fermentation is, and what ne- 
ceffity there is for it in our Bodies efpecially, thefe 
Fermenting People, that talk fo much of it, have not yet 
(b much as told us. That by Fermentation , Bodies 
change their motion, m 'lts degree^ direiiion^ &c, is moft: 
certain: and really here is a moft confiderable alterati- 
on in the Blood's Motion, as we are informed by our 
Pulfe ; arid therefore it might be fuppofed that it did 
Ferment. But then it ifeould have, been a moft confi- 
derable and ufeful Enquiry, to know how the particulars 
of Cantharides do Ferment, and the ways of affeftion 
to make this great Change. I have Ihown in another 
place, that there is no fuch thing as a Chymical Fermen- 
tation in our Blood, and that from hints of an eminent 
Member of this Society, and perhaps the greateft Chy- 
mift that ever Liv'd : and now the ftquel of my 
Difcourib 
