138 



DISEASES OF THE HORSE. 



that he was destroyed. The otlier horse was attacked in the 

 stable with violent courrhing, and soon after with roaring, pro- 

 bably from an oat or some of his food getting into the larynx. 

 He was turned to grass, and soon became so distressed, his 

 breathing being heard at a considerable distance, that it was 

 thought right to destroy him. The only morbid appearance, 

 found upon a careful examination, was a small ulcer on one 

 side of the chink of the glottis." 



[Koaring is frequent witli carriage horses, in whom it is gene- 

 rally produced by tight reining, so as to make the neck more 

 arched ; by this unnatural position the windpipe is distorted so as 

 to cause an im^^ediment to respiration, and thus produce roaring. 

 In some cases, although they are not numerous, the cause of 

 roaring has appeared to be in the lungs ; but when this is the 

 case thick wind is also present. 



The various proximate causes which produce roaring, may be 

 better understood by an inspection of the cuts which follow. 



rig. 2. 



Fig. I . represents the healthy larynx 

 and tracliwa. 



<i tlio tliyroid cartilages, 



h tile arytenoid. 



cc the cricoid. 



d the epiglottis. 



e the tracha\a or windpipe. 



Fig. 2. represents a curvature of the 

 windpipe producing roaring, caused 

 by tigiit reining. 



