8 
ANIMAL PATHOLOGY. 
chial passages; and I have seen it occupying the bronchi, or por¬ 
tions of them, when there was no lesion deservino^ of notice in 
the trachea. In one or two cases, the reason of this excessive 
inflammation below was sufficiently evident. Portions of hair, 
or hay, or dung, had, in some act of violent inhalation, while the 
dog was eagerly or furiously employed in searching among or 
tearing to pieces substances of this kind, entered the glottis, 
been forced down the trachea, and become impacted in the bron¬ 
chi. There was no power to force them back equal to that which 
brought them there ; the membrane of the bronchi would soon 
become engorged, and inflammation would be set up that would 
spread through a greater or less portion of the lungs. 
Shewing, also, the constitutional affection, the inflammation 
of the lungs, when it occurs, is usually of equal intensity on both 
sides of the chest. This is not so in common pneumonia; for 
although, after awhile, the disease, and especially in overworked 
horses, occupies both divisions of the thorax, yet at the com¬ 
mencement, in general cases, and often when the disease has far 
advanced, auscultation denotes a very different state of the two 
divisions of the lungs. I have the record of one case of rabies, 
in which this difference is spoken of. The tongue was swelled 
and black—the pharynx and larynx inflamed—the ramifications of 
the distended vessels of the trachea were fully brought into view— 
the left lobe of the lung was in a high state of inflammation — 
the right lung scarcely at all affected.” I consider this, how¬ 
ever, as an exception to the general rule with regard to rabies, 
for in nine cases out of ten, the inflammation, from the diffused 
action of the virus, is nearly equal on both sides of the chest. 
We do not, however, look to the lungs for any decisive character¬ 
istic symptom, for these organs sometimes exhibit the intensest 
disease, the parenchymatous substance being completely broken 
down ; while at others, and even when the larynx had not escaped, 
the lungs are nearly in a healthy state. 
There is one peculiarity, however, about them, namely, the 
affection of the pleural membrane—the singular patches of 
inflammation which it presents, varying from one or two inches 
in diameter to nearly the size of a hand, and curiously marbled 
and shaded—as often as otherwise confined to one lung, and, 
however intense a character it may seem to have assumed, yet 
never accompanied by adhesion or effusion. 
The Heart .—A veterinary teacher of eminence used to speak 
of spots of ecchymosis on the lining membrane of the ventricles 
of the heart as proofs of rabies. I must beg leave to demur to 
this opinion. They are proofs of a great degree of previous 
inflammation—they may be considered as registers of the extent 
