PNEUMONIA. 103 



The MORBID APPEARANCES exhibited by the lungs iu this 

 stage are, an uniform arterial scarlet tint of the parenchyma, 

 with a slight cast of yellow from the surface of any divided 

 part; attributable to the exhalation of serosity into the 

 interstices of the parenchyma, in particular around the 

 borders of the inflamed places. The lung has lost its elas- 

 ticity and crepitating property, and has increased in weight 

 and density, but still swims in water. Its cut surface is 

 frothy also. This accords with my own observation. 



A horse came under my care for pneumonia on the 19th 

 of March, in whom inflammation ran so high that several 

 bloodlettings, &c. were required before it gave way. He 

 was discharged '' cured^-' on the 13th of the following month 

 — April. A week afterwards, the same horse returned wdth 

 a locked-jaw, of which he died on the third day from the 

 attack. His lungs were now examined. On one side they 

 were found quite sound. On the other, their substance 

 was redder than natural, and there was slight interstitial 

 efi*usion, augmenting their solidity, but not sufficiently so to 

 sink them in water, or to warrant the application of the 

 epithet ^^ livery" or " hepatized" to them. 



The PROGRESS of pneumonia will vary according to cir- 

 cumstances. Generally speaking, in a few days the disease 

 will reach its height, and in a few days more evince indica- 

 tions either of gradually abating, and at length disappearing 

 altogether, or of having set in to produce consequences 

 likely to end in the destruction of life. 



The FAVORABLE SIGNS are — abatement of the embarrassed 

 and quickened respiration ; comparative distinctness in the 

 beats of the pulse; return of warmth to the extreme parts, 

 moisture to the mouth, and secretion to the nose ; SAvelling 

 of the legs, which commonly commences in the hind ones ; 

 and sometimes of the sheath and breast (if the latter have 

 been blistered or rowelled) as well ; return of appetite; the 

 coat becoming smooth and soft; rowel and blisters acting 

 well, should either or both have been applied ; the animal 

 lying down and taking his rest. 



Unfavorably must be regarded symptoms the reverse 



