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 arisinof 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 co2ighing 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. 



