2 JO Anal^fis of the Air. 
thro' thofe fmall apertures in the furfacc 
of the lungs, yet I did not perceive that the 
number of thofe apertures were incrcafed, 
or at leafl; very little. An argument that 
thofe apertures were not forcibly made by 
cxhaufting the receiver lefs than two inches, 
but were originally in the live animal 5 and 
that the lungs of living animals are fome- 
times raifed with the like force, efpecially 
in violent excrcife, I found by the follow- 
ing Experiment, viz. 
Experiment CXIII. 
I ty ed down a live T>og on his back, near the 
edge of a Table, and then made a fmall hole 
thro' the intercodal mufcles into his Tho-^ 
raxy near the T)iaphragm. I cemented faft 
into this hole the incurvated end of a glafs 
tube, whofe orifice was covered with a lit- 
tle cap full of holes, that the dilatation of 
the lungs might not at once flop the ori^ 
fice of the tube. A fmall vial full of fpirit 
of Wine was tyed to the bottom of the 
perpendicular tube, by which means the 
tube and vial could eafily yield to the mo- 
tion of the Dog's body, without danger of 
breaking . 
