1 5 z j4nalyjis of the Air. 



Experiment CXII. 



I have by the following Experiment found, 

 that the air will pafs here and there thro* the 

 fubftance of the lungs, with a very 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 fattened the 

 wind-pipe to a very fhort inverted leg of a 

 glafs fyphon; and then placed the inverted 

 lungs and fyphon in a large and deep glafs 

 veffel x full of water, (Fig. 32.) under the 

 air-pump receiver />/>; and paffing the longer 

 leg of the fyphon through the top of the 

 receiver, where it was cemented faft at z, as 

 I drew the air out of the receiver, the lungs 

 dilated, having a free communication with 

 the outward air, by means of the glafs fy- 

 phon ; 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 exhaufted 



no 



