k 



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la 

 it 



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Anahfis of the Air. 



*5* 



breaking the tube, which was 36 inches long. 

 The event was, that in ordinary infpirations, 

 t hc fpirit rofe about fix inches in the tube ; 

 but in great and laborious infpirations, it 

 would rife 24 and 30 inches, viz. when I 

 flopped thc Dog's noftrils and mouth, fo that 

 he could not breathe : This Experiment (hews 

 the force with which thc lungs arc raifed by 

 thc dilatation of the Thorax, either in ordi- 

 nary or extraordinary and laborious infpira- 

 tions. When 1 blew air with fome force in- 

 to the Thorax, thc Dog was juft ready to 



expire. 



By means of another Ihort tube, which 

 had a communication with that which was 

 fixed to thc Thorax near its infertion into 

 the Thorax , I could draw the tir out of the 

 Thorax, the height of the Mercury, inftead 

 of fpirit in the tube, (hewing to what degree 

 the Thorax was cxhaufted. of air : The Mer- 

 cury was hereby raifed nine inches, which 

 would gradually fubfidc as the air got into 

 the Thorax thro' the lungs. 



I then layed bare the windpipe, and ha- 

 ving cut it off a little below thc Larynx, I 

 affixed to it a bladder full of air, and then 

 continued fucking air out of the Thorax, 



with 













