■l 



■ ll 







I 



250 Analyfis of the Atrl „ 



thro' thofe fmall apertures in the futfaccLf** 1 

 of the lungs, yet I did not perceive that the ,** 

 number of thofe apertures were increafedL irf 

 or at Jeaft very little. An argument that'^r 

 thofe apertures were not forcibly made by 

 exhaufting the receiver lefs than two inches, 

 but were originally in the live animal ; and 

 that the lungs of living animals are fome- ^ , 

 times raifed with the like force, efpecially 

 in violent exercife, I found by the follow- 

 ing Experiment, viz, fa» w 





i 



Experiment CXIIL 









wd 



I ty ed down a live fDog on his back, near the 

 edge of a Table, and then made a fmall holciac ft 

 thro' the intercoftal mufcles into his Tho-r 

 rax, near the 'Diaphragm. I cemented faft 

 into this hole the incurvated end of a glafsufcj 

 tube, whofe orifice was covered with a lit-^^ 

 tic 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- r 

 tion of the Dog's body, without danger of U 



breaking **fc 







