352 CLINICAl, VETKKINARV AIKDICINK AND SURdEKV. 



57. A six-year-old Anglo-Norman horse, left in hospital 24th 

 January, 1895. 



In March, 1894, this horse had suffered from pneumonia. On return- 

 ing to work towards the end of the following month it had shown 

 difficulty in breathing, which was noisy. During the hot weather the 

 roaring increased and the animal underwent various treatment, but 

 without improvement. It was finally sent to Alfort to be operated on. 



Nothing abnormal was detected on exploring the nostrils and nasal 

 cavities, or on externally examining the larynx and trachea. At a slow 

 trot the horse roared after five minutes. When pushed it almost 

 immediately began to whistle loudl}-, producing a noise audible from a 

 considerable distance ; respiration became painful, the nostrils dilated, 

 and the animal, though in very good condition, was obliged to slacken 

 its pace. 



Having been prepared for several days and submitted to two further 

 tests, which gave results similar to the first, the horse was subjected to 

 operation on the 28th January under chloroform. 



The larynx having been opened, the left arytaenoid was seen to be 

 paralysed. The cartilage was removed, only a very small fragment of 

 the articular angle being left, and at the same time the vocal cord was 

 excised. The mucous membrane was not sutured. The parts were 

 dressed with gauze, and sutures passed through the muscles fixing the 

 gauze and cannula in position. The skin was separately sutured. 



The animal was kept without food throughout the day. After-treat- 

 ment was similar to that in the preceding case. From the second to 

 the fifth day the temperature oscillated between 39° C. and 39'7° C. 

 Up to the loth February saliva, drinking-water, and fragments of food 

 passed into the larynx. After the latter date the external wound healed 

 rapidly. On the 8th administration of iodide of potassium had been 

 commenced. On the 17th February the wound was closed. 



When exercised in the riding school on the ist, 3rd, and 5th of 

 March, the horse roared much more loudly than before operation. 



It left hospital on the 7th March. Some days afterwards tracheo- 

 tomy became necessar}-. 



58. Four-year-old Norman horse suffering from severe roaring, 

 which prevented its being used. Left in hospital on the 31st August, 

 1898. 



When ridden in the riding school a roaring sound was produced in 

 a few minutes, and rapidly grew more marked. 



On the 5th September operation was performed ; the left arytjenoid 

 cartilage and internal wall of the corresponding ventricle of the larynx 

 were removed. Dressing and after-treatment were similar to those in 

 the preceding cases. 



Next day the morning temperature was 39"i° C. ; evening tempera- 

 ture 5g'8° C. On the 7th the temperature again became normal. 



Until the nth a little liquid and fragments of food passed through 

 the laryngeal wound. After the 12th, li to 3 drachms of potassium 

 iodide were given daily in the water. Trifling discharge occurred from 

 both nostrils. 



