534 
COULON AND OLIVIER. 
tating, non-transmissible inflammation, whose progress and dura¬ 
tion are quite uniform, the thought must suggest itself that two 
diseases of such different nature must have very different anatomical 
characters. 
The comparative examination of these lesions confirms this 
induction. 
In opening the plenro-pneumonic cadaver, the sternal region 
and at times the neck, are the seat of swelling. This is some¬ 
times quite large, and the subcutaneous cellular tissue through 
which it exists is indurated, intimately united to the skin and 
penetrating by its deep surface into the intermuscular structures, 
in such a way that a section of them resembles much the marbred 
aspect of the lung. 
In the sporadic disease, no infiltration of the dewlap, or of 
the neck. The skin, subcutaneous connective and the intermus¬ 
cular tissue are normal. 
In the contagious disease the pleural sac is the seat of strong 
inflammation, characterized by a great exudation, reddish or yel¬ 
low, floconous ; by thick false membranes, often united together; 
and again, by the removal of the pleural epithelium, which is then 
replaced by a rough, irregular, dark red surface covering and con¬ 
cealing the aspect of the lung. 
In the sporadic disease, there is no trace of liquid in the 
pleura, which remains healthy, soft, transparent. If at times sub- 
pleural pulmonary abscesses exist, the adherence of the two layers 
is dry and limited to the extent of the abscess. 
In the pleuro-pneumonic lung, a transverse section indicates a 
lobular pneumonia; the lesions are disseminated in the whole 
organ, which presents a number of little centres which, still 
healthy, are side by side with others strongly congested or even 
completely indurated and discolored. 
The interlobular divisions, the primitive seat of the disease, are 
considerably hypertrophied, but irregularly so, and of various 
manner; while here they are very thick, there their thickness is 
quite small. There are some gorged with citrine yellow liquid, 
with fibrinous concretions in their network, while others arc 
much indurated and of fibrous texture. 
