DISEASES OF THE RESPIRATORY ORGANS oq5 



cient force to cause the bones to bulge out, but there will be a constant 

 flow of i)us from the nostril, sufficient being forced through the passage 

 b}'^ the pressure, to keep up the discharge. 



How to know it. — The general health is not in the least affected, 

 except, perhaps, in long standing cases. There is a continual flow of thick, 

 offensive, yellowish matter that will usually sink in water. One nostril 

 usually runs more than the other, and oftentimes the chrome trouble is 

 entirely confined to one side. The face between the eyes will be found 

 to be full, giving a dull, solid sound when tapped on each side of the 

 median line running down the centre of the face. In long standing, bad 

 cases the bone of the face, referred to above, will be bulged out, and 

 great pain evinced when tapped. 



Pus is, naturally, the blandest secretion of the body ; but being con- 

 fined, it corrupts, and then smells abominably. The facial sinuses formed 

 in nasal gleet, oi)en to the nostrils on either side by two comparatively 

 small flaps, slits or valves. These are their only means of communica- 

 tion with the external atmosphere ; and through these valves all the pus 

 must flow. It is not surprising that such structures occasionally become 

 clogged, till the accumulated secretion, or the increased breathing, or the 

 position of the head, obliges the passage to give way. 



What to do. — If the sinus is full, there is no cure for it without the 

 operation of trephining to remove a portion of the bone, to evacuate the 

 sinus, and give local treatment ; but if there is no bulging 

 of the bone, it may be cured by syringing out the nostril 

 with warm water to clean it, then injecting a little of lotion 

 No. 39 with along-nozzled syringe, using considerable force 

 to cause a spray when it strikes the back of the nose. 

 Repeat this, morning and night, for a month or so, and 

 give internally. No. 34. The operation of trephining the 

 frontal sinus, will be found described in the chapter on 

 operations. 



All treatment, except the operation, may be continued 

 and the horse kept at his work, unless he is laid up on 

 account of the appearance of the nostril, as it looks very nasal gleet. 

 bad to drive a horse with a chronic discharge from the "wuh iTasaVgieel 



and bulging of 

 the trontal sinus. 



V. Laryngitis, Roaring and Whistling. 



This is what is ordinarily known as sore throat. The inflammation 

 liea in the lining of the larynx — that is, the cartilaginous box in (he throat, 

 which is the upper end of the windpipe or trachea containing the vocal 

 cords, and is the seat of roaring. 



