KABIES IN THE DOG.—SYMPTOMS. 
7 
to account for the harsh guttural breathing which frequently 
accompanies the dumb madness. 
The Larynx ,—The same remark may be made with regard to 
the interior of the larynx. The inflammatory blush that is 
observed here, the turgescence of the mucous membrane, althougli 
existing in the slightest possible degree, and whether confined to 
the inner edge of the glottis, or extending to the chordae vocales, 
or occupying the ventricles—these circumstances are deserving 
of attention, not as being invariable lesions, but as usually found 
when the voice is materially changed, or there has been a harsh 
guttural sound accompanying the breathing. It is true, these al¬ 
terations of structure must be looked closely after, in order to be 
found, and, when found, they are often insignificant, compared 
with their supposed effect. This, however, is nothing new ; for 
after the most careful examination, and with regard to all the dis¬ 
eases of the larynx and the changes of voice, very little propor¬ 
tion can be traced between them. 
The Trachea .—The appearance of the lining membrane of this 
tube will only indicate the degree of inflammation, and not its 
cause. I have seen it existing in the highest intensity through 
the whole of this canal,—or the inflammatory blush has died 
away, at a very small distance from the larynx,—or the trachea 
has been perfectly devoid of inflammation, although the epi¬ 
glottis and the glottis have been injected and tumefied to a very 
great extent. 
The Bronchi and Lungs ,—The membrane of the bronchi 
is occasionally highly inflamed, and even the lower part of the tra¬ 
chea may be filled with a viscid or bloody spume. M. Trolliet 
having observed this in some cases of rabies in the wolf, and one or 
two in the dog, fixed on the bifurcation of the trachea, and the com¬ 
mencement of the bronchi, as the chosen residence of the disease ; 
and the spot at which the virus is chiefly or solely eliminated. 
The poison, in his opinion, resides not in the saliva, but in the 
secretion from this portion of the respiratory canal. I am now 
conscious of having inexcusably neglected the opportunities 
which I enjoyed some years ago, of testing many of the opinions 
entertained with regard to the nature of rabies ; but this point I 
did, to my own satisfaction at least, set completely at rest. For 
a considerable period, this part was never overlooked in my exami¬ 
nation of the rabid dog; and I can truly say, that not in one case 
out of three did I find any considerable inflammation of the 
bronchi, and not in one in a score, the viscid and bloody spume 
which M. Trolliet describes. 
In a few cases, however, the inflammation does extend down 
the trachea, and through a greater or lesser jiortion of the bron- 
