ROARING IN HORSES. 



55 



mucous membrane is penetrated from front 

 to back and from without to within ; then, 

 at a corresponding point, the posterior Hp is 

 traversed from front to back and. from within 

 to without (fig. 15). One of the ends of the 

 catgut thread is retained at the outside of 

 the posterior lip of the wound, and the other 

 is drawn back with the needle to the outside 

 of the anterior lip ; the ends of the thread 

 are then knotted together and drawn suffi- 

 ciently tight without injuring the mucous 

 tissue. To accomplish this rather delicate 

 part of the operation, the thumb or index 

 finger may be passed into the larynx, and 

 draw gently on each end of the thread ; the 

 extremities of the suture are then cut off 

 close to the knot. 



The other two sutures are placed in the 

 same manner (fig. 16). When the laryngeal 



