CEREBRO-SPINAL MENINGITIS. 
829 
If time permitted it would be interesting to analyse the 
arguments which have been advanced to prove the identity of 
these affections. It would be equally instructive to discuss the 
various experiences in reference to certain properties of these 
bacteria, such for example, as the formation of indol, their re¬ 
action to the Widal serum test, and their toxins and antitoxins. 
These, however, are still in the experimental stage. It should 
be stated, that while it may be possible, under certain restricted 
conditions, to point out more similarities than differences, I 
have failed in my task if I have not shown that from first to 
last these diseases are different. When their investigation is 
extended by any of the methods of modern bacteriological or 
pathological research we are impressed with their striking dis¬ 
similarities, rather than with their exceptional resemblances. 
Thus, in the study of their morbid anatomy, the morphology 
and biochemic properties of their specific organisms, or in the 
mysterious problems of artificial immunity and resistance, they 
differ the one from the other. Finally, as I understand them, 
the diseases known in America as hog cholera and swine plague 
are separate and independent affections, and each should have an 
unchallenged place in the annals of comparative medicine and 
pathology. 
CEREBRO-SPINAL MENINGITIS. 
By W. J Martin, V. S., Kankakee, III. 
On September i6 of last year, I was requested by Mr. J. G. 
to go to his barn about 20 miles west of this city to examine a 
sick mare, he stating that he had recently lost two young horses 
from the same sickness the mare now had, the nature of which 
was totally unknown to him. Upon my arrival at the barn, 
I found a bay mare, aged seven years, suffering from chronic 
cerebral disease, it being nearly seven weeks since the mare 
was first noticed to be “off her feed.” She died a few days 
later. It is not this particular case which I wish to call to the at¬ 
tention of the members of the profession, but the common prev¬ 
alence of this form of cerebral disease in certain sections of 
