2$z Analyfis of the Air . 
Experiment CXIL 
I have by the following Experiment 
found, that the air will pafs here and there 
thro’ the fubftance of the lungs, with a ve- 
ry fmall force, viz. 
I cut afunder the bodies of feveral young 
and fmall animals juft below the ‘Diaphragm, 
and then taking care not to cut any veffel 
belonging to the lungs, I laid the Thorax 
open by taking away the Diaphragm , and 
fo much of the ribs, as was needful to ex- 
pofe the lungs to full view, when blown 
up. And having cut off the head, I faftned 
the windpipe to a very Ihort inverted leg of 
a glafs fyphon ;• and then placed the invert- 
ed lungs and fyphon in a large and deep 
glafs veffel x full of water, (Fig. 32,.) under 
the air pump receiver p p, and palling the 
longer leg of the fyphon thro’ the top of the 
receiver, where it was cemented fall at z, 
as I drew the air out of the receiver, the 
lungs dilated, having a free communica- 
tion with the outward air, by means of the 
glafs fyphon 5 fome of which air would 
here and there pafs in a few places thro’ 
the fubftance of the lungs, and rife in fmall 
ftreams thro’ the water, when the receiver 
was 
