Symptoms and Diagnosis of Chronic Roaring. 63 



Prince Charlie, which in the Doncaster St. Leger in 

 1872, had the other horses at his mercy for a certain 

 distance, " when he stopped as if shot," the dyspnoea being 

 too severe for him to continue. In these two examples the 

 larynges were in different conditions; in that of Prince 

 Charhe, the morbid changes had reached an advanced 

 stage ; in Ormonde and Shadow they were not so 

 developed, and although there was a certain amount of 

 obstruction to the entrance of air into the organ, sufficient 

 to produce a loud noise, yet enough gained access to 

 carry on the vital function of the lungs. Prince Charlie 

 doubtless made a whistling, screaming, or stridulous noise, 

 but I can testify that Ormonde did not, though no doubt 

 whatever could be entertained that he was affected with the 

 malady of which we are treating. 



The stage which the disease of the larynx has reached, 

 may also be inferred from the duration of the sound when 

 the horse has been stopped after exertion. In those cases 

 in which it is only commencing gradually, or which, though 

 in existence for some time, it has made no progress, the 

 noise ceases at once, or almost immediately after the 

 animal is pulled up ; but in cases in which there is much 

 alteration, the abnormal sound may be heard for several 

 seconds — even as long as one or two minutes in very bad 

 cases — after halting. Ormonde's Roaring ceased immediately 

 when stopped after galloping. 



The noise is also emitted sometimes, and especially in 

 nervous horses, when frightened or otherwise excited. In 

 the act of coition, a stallion which is a bad Roarer will 

 emit the characteristic sound ; and one of the popular tests 

 for Roaring is threatening to strike the animal when 

 placed against a wall— both acts causing a sudden inspira- 

 tion of air. The sound is also more speedily produced, and 

 is generally louder, if, during movement, the horse's nose is 

 pulled in towards the chest, and especially towards the 

 right side. The reason for this will be understood when 

 we come to study the pathology of Roaring. 



