ROARING IN HORSES. 39 



balloon is sufficiently distended a ligature 

 should be applied to the india-rubber tube 

 near the cap of the pavilion of the canula, 

 and the remainder of the small tube with 

 the bellows removed (fig. 9). Even when 

 the balloon is filled to the desired extent, the 

 canula has a tendency to slip towards the 

 larynx ; it should therefore be kept in place 

 by a whipcord, a dossil, or a band placed 

 under the pavilion of the tube, and the two 

 ends carried backwards (fig. 9). 



Third Phase : Ablation of the Arytenoid 

 Cartilage. — It is sufficiently easy to determine 

 which of the arytenoids is affected with 

 paralysis by a comparative examination of 

 their action, as well as to be able to judge 

 of its degree. In every operation which I 

 have made till now, the paralysis affected the 

 left side ; in three cases the two cartilages 



