[ 37 1 5 
mon with acids (and which were firft detected by 
sir john pringle, and have lince been more fully 
explained by Mr. macbride and Dr. priestly)j 
we then, in fome meafure, may account for thofe 
extraordinary effects, which this kind of air is found 
to produce in the cure of many obftinate difeafes, 
with which mankind are afflidted. 
B b b 2 
XL. Par- 
