30 



ROARING IN HORSES. 



of balloon produced by inflating it, when 

 within the trachea, with air by means of a 

 small india-rubber tube provided with a 

 bellows, which is connected with it by an 



Fig. 7. — Hooked or artery forceps. 



opening in the wall of the canula from the 

 inside ; when distended the small india-rubber 

 tube is ligatured at a point outside the canula 

 and the india-rubber ball bellows removed 

 (fig. 9). In place of the above an ordinary 



