( M ) 
What has been faid, will alfo fufficiently account 
for the anodine Power of Opium ; for if it impedes 
the Secretion of the animal Spirits, the immediate 
aftive Inftruments of all Senfation, it inuft certainly 
obtund or abolilh for that Time the difagreeable Sen- 
fation of Pain. 
The third Difficulty is, how Pus ffiould be the 
ProduQ of Chyle , and not of the Blood or Serum . 
As to which, I think it would not be difficult to prove' 
that all the grofs Secretions are from the Chyle ; 
thefe being only the Depurations of it in Sanguifica- 
tion, or in order to bring that crude and grols Fluid 
the Chyle into pure and deficated Blood, from which 
no Secretion can afterwards be made, but of that 
pureft Fluid , which it fecretes into the Nerves for 
the Ufe of the whole Oeconomy, 
If this be true, then Pus in a Wound, Ulcer, or 
Impoftume, being a very grofs feculent Humour, is 
likelier to iffue from the Chyle than from the purer 
and more defecated Part of theMafs^ but the farther 
Proof of this would be too tedious for this Place. 
N. B. The Reader will he pleafed to excufie an 
Owijfion in § VII, of Symptoms in the EJfay here re- 
ferred to , N° 414, p. 344, relating to the Quantity 
•of Urine, where the following Words ought to 
have been added , [Not exceeding 3, or at mod 4 
Ounces in 24 Hours, fo far as I was able to judge 
without meafuring it.] 
E * 
D 
III. A 
