156 Analyjis of the Air. 



rity, that paffage was alfo flopped with a 



fpigot. 



As foon as the firft foffet was tied faft to 

 the wind- pipe, the bladder was blown full of 

 air thro' the other foffet ; when the Dog had 

 breathed the air in the bladder to and fro 

 for a minute or two, he then breathed very 

 faft, and {hewed great uneafinefs, as being 

 almoft fuffocated. 



Then with my hand I preffed the bladder 

 hard, fo as to drive the air into his lungs with 

 fome force -, and thereby make his Abdomen 

 rife by the preffure of the Diaphragm^ as in 

 natural breathings : Then taking alternately 

 my hand off the bladder, the lungs with the 

 Abdomen fubfided ; I continued in this man- 

 ner to make the Dog breathe for an hour > 

 during which time I was obliged to blow 

 frefti air into the bladder every five minutes, 

 three parts in four of that air being either 

 abforbed by the vapours of the lungs, or 

 efcaping thro' the ligatures, upon my pref- 

 fmg hard on the bladder. 



During this hour, the Dog was frequently 

 near expiring, whenever I preffed the air 

 but weakly into his lungs ; as I found by 

 his pulfe, which was very plain to be felt 

 in the great crural artery near the groin, 



which 

 4 



