ROARING. 5 1 



When all the swelling has subsided, and the tumour 

 becomes flattened, and the matter assumes a thick white 

 appearance, the seton may be removed, and the ulcer dressed 

 with the following ointment : — 



Digestive ointment . . ^ ounce, 

 Nitrated ointment of mercury, I ounce, 

 Bees'-wax . . . i ounce. 



The wound should be washed with a lotion composed of 

 Muriate of mercury . . -^ drachm, 

 Lime-water ... 6 ounces. 



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 grunting sound. Or 

 when he is standing, if touched suddenly in the loins with 

 a whip or stick, he will involuntarily grunt or groan. 

 Dealers are frequently in the habit of practising this test ; 

 because, if a horse is moderately exercised or at rest, this 

 complaint never manifests itself. 



Cause. — It is supposed to be produced by a thickening of 

 the larynx and upper portion of the windpipe, in conse- 

 quence of previous inflammation, and thus obstructing the 

 passage and limiting its action. After strangles this disease 

 frequently follows. Tight reining is also a common cause 

 of this evil. By this the action of the larynx and superior 

 muscles of the windpipe are circumscribed, and ultimately 

 become semi-paralysed, with consequent loss of power and 

 action ; therefore, the opening not being sufficiently capacious 

 during the rapid breathing occasioned by violent exercise, 

 the pressure of the air rushing through the circumscribed 

 space, the sound is produced which has been absurdly termed 



