452 
ANIMAL PATHOLOGY. 
possible. Two or three days may pass over, and there is not 
another suspicious circumstance about the animal: still he keeps 
him under quarantine, for long experience has taught him to 
listen to that warning, and at length the disease is manifest in 
its most fearful form. 
There is another partial change of voice to which the ear of the 
practitioner will by degrees become habituated, and which will 
indicate a state of the animal quite as dangerous as the direct 
howl ; I mean when there is a hoarse inward bark, with a slight 
but characteristic elevation of the tone; or, in a few cases, 
when after two or three distinct barks, comes the peculiar bark 
and howl mingled. The first of these will gradually dege- 
nerate into the hoarse grating, choaking breathing of dumb 
madness : the other will gradually shorten into the rabid 
howl. In a few instances, in the dumb madness, the choaking, 
grating breathing is never heard, or continues but a little while; 
the characteristic howl, of course, is not heard, but the bark 
gradually deepens until it becomes strangely hoarse and gruff. 
I cannot describe all the changes of voice which the inflamma- 
tion, or thickening, or oedema of the lining membrane of the 
fauces or the larynx may produce : various are the lesions of 
these parts which post-mortem examination of the rabid dog will 
display ; but I return to the principal point, that there is one 
change of voice produced by this laryngeal affection, the rabid 
howl, which cannot possibly be mistaken. 
Change in the Eyes . — The time is not yet arrived for an in- 
quiry into the causes of the various symptoms of this disease, 
but there is a singular circumstance that must not be forgotten. 
I have spoken of the peculiar brightness of the eye of the rabid 
dog. It soon passes away. You saw none of it in the dog that 
was produced on this table in the first lecture — he was rather 
cowed and frightened. It was evident enough on the following 
day ; and, ere the close of the third day it had entirely disap- 
peared. The eye does not merely return to its former hue and 
expression, but it becomes dull, and wasted — a cloudiness 
steals over the conjunctiva— -then a yellow tinge, deepening and 
assuming a dull green colour — a green-glass-bottle colour, as some 
one has well described it : in fact, a process of ulceration is set 
up deep within the eye. Its primary seat has never been satis- 
factorily determined ; but it is fearfully rapid in its progress, and 
in forty-eight hours from the first cloudiness of the eye it has 
become one disorganized mass. It has burst at the cornea, and 
it is rapidly wasting away. 
Cases. — I had a patient thus briefly described ; for I saw him 
but once, “ partial paralysis of the lower jaw — tongue hang- 
