94 DISEASES OF THE LUNGS. 



SO that when the head is hung down, the discharge, when 

 very great, will pour out from the air-passages. This is all 

 very favorable, since such fluxes will carry off the im- 

 pending inflammatory action. The worst turn an attack of 

 bronchitis can take is the insidious one which commences 

 with some irritation about the throat, accompanied with 

 sore and oppressed cough, and, without occasioning much 

 discharge, communicates itself to the substance of the lung, 

 and, may be, pleural membrane as well, and so changes its 

 character into either pneumonia or pleuro-pneumonia. 



Bronchitis will break out without precursory 

 CATARRH. — The horse will suddenly fall ill, be seized with 

 violent blowing and distressful breathing, and all at once 

 will emit copious outbreaks of mucous matters from his 

 nose, from which he will at the moment, perhaps, obtain 

 some relief; though they may, should they occnr often, 

 prove so dangerous as to produce suffocation even. Com- 

 monly, however, these sudden and violent attacks soften 

 down into ordinary bronchitis ; though at times they run 

 the opposite way, and end in pulmonic disease. 



Epidemic or influenzal bronchitis is attended with 

 exceeding sore throat and profuse discharges from the nose, 

 at the same time the latter are modified and varied in their 

 character, being sometimes white, sometimes yellow, and 

 even at times green in colour, according to circumstances : 

 the green tinge being given to it either through malig- 

 nancy or while the horse is feeding on green-meat. The 

 disease is so much more asthenic than sthenic as sometimes 

 to be attended with great weakness of loin and prostration 

 of strength, and with low febrile irritation : the blood 

 evidently showing that the pulmonary changes requisite 

 for its healthy conditions but imperfectly take place, 

 seemingly owing to the obstructed condition of the smaller 

 ramifications of the bronchial tubes. 



The pathognomonic symptoms of bronchitis are — in- 

 ordinate nasal flux, with reddening of the Schneiderian 

 membrane, cough, sore throat, dyspnoea. Auscultation will 

 assist us in our diagnosis. In place of the natural, soft. 



