EPIZOOTIC PL ETJRO-PNEUMONIA. 
67 
breast and upon the sides, I find those parts well prepared for the 
reception of setons or rowels, or blisters, should it be deemed ad- 
visable — which to me it generally is — to have recourse to them. 
No doubt can exist in any practitioner’s mind of the benefit deriv- 
able from counter-irritation ; at the same time, T, for my own part, 
entertain very great doubt of its utility in any form than that of 
stimulation, until such time as the inflammatory action has shewn 
signs of being on the decline. That stage of the inflammation 
when effusion is about to take place seems to me to be, of all 
others, the fittest for the employment of our blisters and setons. 
Some cases on or about the seventh day shew oedema of the 
belly, sheath, breast, and, either at the same time or afterwards, 
of the legs as well. This, in general, may be regarded as favour- 
able — critical indeed — since it occurs on a critical day ; for, that 
the third, seventh, and eleventh or twelfth, are critical days in this 
disease, my experience has always led me to believe, and to look 
to as such. I expect to find my patient exceedingly ill on the third 
day, and if this continues unabated on the fourth I look forward to 
the seventh ; should he pass which unrelieved, I fix my hopes on 
the eleventh or twelfth, beyond which I have little hope of 
saving life. 
The ‘post-mortem appearances are — signs of intense and ex- 
tensive inflammation of the pleura ; coatings of its surfaces with 
albuminous matter ; hydrothorax ; condensation or hepatization 
of the substance of the lungs, and, when the disease has been of 
any duration, to that extent in places as clearly to indicate the 
commencement of tubercle. Should the recent disease have su- 
pervened upon (or attacked the lungs in) any state of former dis- 
ease, the tuberculous changes will appear more advanced, or may 
be perfected, the horse dying phthisical. 
EPIZOOTIC PLEURO-PNEUMONIA. 
By Mr. COPEMAN, Walpole. 
[Continued from p. 17.] 
PATHOLOGY. — In the respiratory organs the air may be said to 
undergo a process of digestion, certain proportions or elements of 
it entering into the circulation with the blood, and noxious emana- 
tions conveyed to the lungs during the respiratory process most 
probably affect the condition of the circulating organs, and of the 
blood itself. 
Inflammation produced by animal emanations generally assumes 
