2 y 1 Anal^fis of the Air. 
with a force fufficient to keep the lungs 
pretty much dilated. As the Mercury fub- 
fided in the gage, I repeated the fuftion for 
a quarter of an hour, till a good part of the 
air in the bladder was either drawn thro' 
the fubftance of the lungs into the Thorax^ 
or had loft its elafticity. When I prefled the 
bladder, the Mercury fubfided the fafter $ the 
Dog was all the while alive, and would 
probably have lived much longer, if the 
Experiment had been continued j as is likely 
from the followmg Experiment, viz. 
Experiment CXI V. 
I tyed a middle fized Dog down alive on 
a table, ind having layed bare his windpipe, 
I cut it afunder juft below the Larynx^ and 
fixed faft to it the fmall end of a common 
foffet 5 the other end of the foffet had a 
large bladder tyed to it, which contained 
i6i cubick inches •, and to the other end of 
the bladder was tyed the great end of ano- 
ther foffet, whofe orifice was covered with 
a valve, which opened inward, fo as to ad- 
mit any air that was blown into the bladder, 
but none could return that way; yet for fur- 
ther 
