Analyfis of the Air • 2,47 
fome of it, together with the acid fpirits, 
with which the air abounds, are conveyed 
to the blood, which we fee is by an admi- 
rable contrivance there fpread into a vaft 
expanfe, commcnfurate to a very large fur- 
face of air, from which it is parted by very 
thin partitions j fo very thin, as thereby 
probably to admit the blood and air particles 
(which are there continually changing from 
an elaftick to a ftrongly attracting ftate) 
within the reach of each others attraction, 
whereby a continued fucceffion of frefh air 
may be abforbed by the blood. 
And in the analyfis of the blood, either 
by fire or fermentation in Exper. 49, and 80, 
we find good plenty of particles ready to re- 
fume the elaftick quality of air : But whe- 
ther any of thcfe air particles enter the 
blood by the lungs, is not eafy to deter- 
mine 5 becaufe there is certainly great ftore 
of air in the food of animals, whether it be 
vegetable or animal food. Yet when we 
confider how much air continually lofes its 
elafticity in the lungs, which feem purpofely 
framed into innumerable minute meanders, 
that they may thereby the better feize and 
bind that volatile Hermes: It makes it very 
probable, that thcfe particles which are 
R 4 now 
