626 REVIEW — ON THE EPIZOOTIC IN CATTLE. 
disease has quickly run its course, and that death has been some- 
what sudden. But when the disease is protracted, there is always 
more or less hepatisation, adhesive matter being effused into the 
cellular connecting substance : the lungs are thus blocked up; the 
action of the air is prevented ; abscesses may be formed ; and the 
lung becomes a mottled indurated mass, easily torn, but so solid 
and heavy as to sink in water. 
“The lining membrane of the bronchi is more or less injected, 
and the mucous secretion is very abundant. 
“The extensive pleural adhesions which so many cases of pleuro- 
pneumonia exhibit, and which are regarded as strictly diseased 
conditions, result from an effort of nature to prevent the friction 
caused by the contact of the inflamed surfaces. Serum is thrown 
out, and lymph and albumen deposited ; which becoming coagu- 
lated, the flocculi arrange themselves in layers, and are streaked 
with pink lines, or interspersed with red patches, caused by the 
colouring matter of the blood. These layers are more vascular 
and red nearest to the ribs and the lungs. A serous or albuminous 
deposit may be re-absorbed, but lymph becomes organised, and 
those morbid adhesions ensue which no treatment can remove. 
Where a great accumulation of organised lymph has taken place, 
the lung, although not of itself having been the seat of inflamma- 
tion, becomes compressed, loses its elasticity, its light spongy ap- 
pearance, and seems in its structure more to resemble muscle than 
lung. From the adhesion and subsequent separation of their sur- 
faces, the pleurae are sometimes found rough, and studded with 
small points. Serous effusion within the cavity of the chest results 
from the increased action of the pleural vessels, and many gallons 
of water are thus poured out. Sometimes the fluid is albuminous, 
and sometimes it contains pus. 
“ By sympathetic action, all the serous membranes are more or 
less affected. The pericardium sometimes contains as much as 
a gallon of serum. Its visceral and parietal layers may, like the 
pleural surfaces, be adherent, and covered with deposits of lymph 
and albumen. 
“ The substance of the heart may participate in the disease, but 
such cases are exceedingly rare. The cavities of the organ, how- 
ever, are generally filled with dark grumous blood. 
“ The bronchial glands are sometimes in a state of suppuration. 
“In some cases the liver is entirely disorganised, and the bile 
thickened and dark-coloured. 
“ The third stomach will sometimes be found distended with dry 
hardened food, which is caked on the surface of its leaves. This 
condition depends upon the disordered state of the digestive sys- 
tem, and the rapid absorption of the more fluid contents of the 
