42 MANUAL OF MODERN FARRIERY 



by wrapping a thread round it, and pulled round once 

 daily during the twenty-four hours, taking care to 

 wipe the part which has been in the abscess, and also 

 to wet the portion which is to remain in it for a time, 

 with the above solution. 



When all the swelling has subsided, and the matter 

 assumes a thick white appearance, the seton may be 

 removed, and the wound kept clean with an antiseptic 

 lotion. 



ROARING. 



SYMPTOMS. This is a disease arising from an 

 affection of the larynx and superior portion of the 

 windpipe. When a horse so affected has been hard 

 trotted or galloped, he may be heard at some distance 

 to utter a whistling or roaring sound. Or when he is 

 standing, if touched suddenly in the flank with a whip 

 or stick, he will involuntarily grunt or groan. Dealers 

 are frequently in the habit of practising this test ; be- 

 cause, if a horse is moderately exercised or at rest, 

 this complaint never manifests itself. 



CAUSE. It is due to disease of the inferior laryngeal 

 nerve, which leads to atrophy and fatty degeneration 

 of the muscles which dilate the larynx, and as a con- 

 sequence the mouth of the windpipe is narrowed and 

 altered in its shape. After strangles this disease 

 frequently follows. Tight reining is believed by some 

 to be a cause of this evil, but cart-horses are more 

 frequent roarers than any other, and they neither wear 

 a "bearing rein," nor are driven with a tight rein. 

 The practice of what is termed coiighing a horse, to 

 ascertain the state of his wind, is apt to produce 

 roaring. This is performed by subjecting the larynx 

 or trachea to violent pressure by squeezing with the 

 fingers. A horse so afflicted is decidedly unsound. 



