ROARING IN HORSES. 33 



and soap, and then with a one per thousand 

 solution of corrosive sublimate. 



Method of Operating. — First Phase : 

 Incisioit of the Skin and Muscles which cover 

 the Larynx. — The incision of the tissues which 

 cover the lower surface of the larynx should 

 be made on the middle line, and extend 

 from the body of the thyroid to the second 

 or third ring of the trachea. These points 

 can be easily distinguished on examining the 

 region. That done, the skin is divided to 

 the full extent at one cut, the edges being 

 slightly turned back the intersection of the 

 sterno-hyoidean and omoplat-hyoidean muscles 

 is seen. The muscular coat can by that 

 means be cut through exactly in the middle 

 line. The division of the encircling laryn- 

 geal connective tissue completes the first part 

 of the operation. There is never much 



