26 THE PRACTICE OF VETERINARY MEDICINE. 



muscles of the left side which underojo the degenerative 

 process ; but disease causing roaring is essentially a disease 

 of a progressive character, and sometimes it exists to such a 

 degree in old cases, where probably the muscles of both sides 

 are atrophied, that a trot of a hundred yards will cause the 

 animal to stop and show symptoms of suffocation, as stagger- 

 ing and roaring, to an alarming degree. It is an act of mercy 

 to destroy such an animal. However, the animal may be 

 relieved by tracheotomy, and used for slow work. 



TRACHITIS. 



Definition. — Inflammation of the mucous membrane 

 lining the trachea. 



Inflammation of the trachea is generally due to the 

 presence of some foreign body, or exists as a complication 

 of laryngitis, etc. 



Symjytoms. — The respiration is somewhat laboured, and 

 on auscultation of the tracheal region a rattling sound may 

 be plainly heard, except in the early stages ; there is a 

 nasal discharge which relieves the trouble considerably. 



Treatment. — Clip the hair over the course of the trachea, 

 and apply the ammoniacal liniment, or mustard ; the latter 

 being the best, as well as being a very safe application — in 

 an hour or two it may be sponged off", especially if the 

 horse becomes excited and irritable. Medicinal agents are 

 tr. aconite, potassium chlorate, potassium nitrate, etc. Clothe 

 the patient and keep out of draughts, and do not allow 

 the animal to breathe very cold air. 



Tracheotomy. — Sometimes, as a result of tracheotomy, 

 there is noticed a tumour, or growth of a cartilaginous 

 nature at the opening. 



Treatment. — Unguentum iodi, simple or compound, but 

 in all cases strong, should be frequently and freely applied. 



Trachea. — I recollect Professor Smith, in one of his 



