DISEASES OF THE CHEST AND LUNGS. 299 . 



cells. The langs are in a state of fearful congestion', and it 

 often happens that simple congestion, such as maybe caused 

 by violent over-exertion at any time, brings on an attack of 

 pneumonia. 



" The unfavorable symptoms," says Youatt, '* are, increased 

 coldness of the ears and feet, if that be possible; partial 

 sweats ; grinding of the teeth ; evident weakness ; staggering, 

 the animal not lying down. The pulse becomes quicker, and 

 weak and fluttering ; the membrane of the nose paler, but of 

 a dirty hue, the animal growing stupid, comatose. At length 

 he falls, but he gets up immediately. For awhile he is up 

 and down almost every minute, until he is no longer able to 

 rise; he struggles severely; he piteously groans; the pulse 

 becomes more rapid, fainter, and he dies of suffocation. The 

 disease sometimes runs its course with strange rapidity. A 

 horse has been destroyed by pure pneumonia in twelve hours. 

 The vessels ramifying over the cells have yielded to the fear- 

 ful impulse of the blood, and the lungs have presented one 

 mass of congestion. 



"The favorable symptoms are, the return of a little warmth 

 to the extremites, the circulation b^inning again to assume 

 its natural character; and, next to this, the lying down quietly 

 and without uneasiness, shoeing us that he is beginning to 

 do without the auxiliary muscles. These are good symptoms, 

 and they will rarely deceive. 



" Congestion is a frequent termination of pneumonia. Not 

 only are the vessels gorged — the congestion which accom- 

 panies common inflammation — but their parietes are neces- 

 sarily so thin, in order that the change in the blood may 

 take place, although they are interposed, that they are easily 

 ruptured, and the cells are filled with blood. This eftused 

 blood soon coagulates, and the lung, when cut into, presents 

 a black, softened, pulpy kind of appearance, termed, by the 

 farrier and the groom, rottenness, and being supposed by them 

 to indicate an old disease. It proves only the violence of 

 the disease, the rupture of many a vessel surcharged with 

 blood; and it also proves that the disease is of recent date; 



