146 Veterinary Medicine. 



excision of the left arytenoid cartilage. As improved by Moller 

 and others this consists in an incision through the cricoid cartilage 

 and crico-thyroid membrane (or even the first rings of the trachea) 

 and the complete extirpation of the left arytenoid cartilage and 

 left vocal cord. The manipulations belong to surgery. The re- 

 sult is satisfactory in removing the violent dyspnoea in hurried 

 breathing and in very favorable cases in obviating noise alto- 

 gether. More commonly some stridor remains but not enough to 

 interfere with pace or with heavy draft. From my personal ex- 

 perience in performing the operation, I would recommend it in all 

 cases in which the obstruction is so great as to interfere with the 

 use of the horse on the track, or road, or for heavy draught. But in 

 slight cas2S, in which the disease causes little or no inconvenience 

 beside the noise, I would advise some less radical measure. 



Another obvious line of treatment is by the use of electricity 

 locally and of strychnine internally. A weak current kept up for 

 fifteen minutes may be sent from the positive pole in the left jug- 

 ular furrow to the negative pole over the left side of the larnyx. 

 Strychnia in the dose of two grains may be given daily in the food 

 or in half that amount hypodermically over the left side of the 

 larnyx. This would be useful only in the early stages with little or 

 no fatty degeneration of the muscles. 



