56 
EXTRACTS FROM EXCHANGES. 
strain the diseased structures will reasonably withstand. (4) 
Keep the hoofs well shod with heels to protect the supporting 
structures. Examine the feet daily for wounds, or protect the 
sole against injuiy with pads. (5) Remember that an exostosis 
that only slightly interferes with the movement of a joint is a 
more serious condition for unnerving than a. large one that 
obstructs motion entirely. The friction of an exostosis on its soft 
environment is one of the common causes of break-down. (6) 
Operate so as to encourage prompt healing, and allow a reasonable 
period of rest after the .operation.— (L. A. M.) 
EXTRACTS FROM EXCHANGES. 
GERMAN REVIEW. 
By Adoi.ph Eichhorn, D.V.S., Milwaukee, Wis. 
Diphtheria in the Horse \_Louis Cobbet ].—The history 
of this remarkable case is as follows: A child became sick 
with diphtheria ; the father owned a pony, which was suffering 
from a bloody-pussy, nasal catarrh ; there were also swelling of 
the glands and dyspnoea present. From the nasal discharge of 
the horse a culture was made, in which bacilli grew similar to 
diphtheria. This bacillus proved to be pathogenic in guinea- 
pigs, in the same way as the diphtheria bacillus. Earge quan¬ 
tities of the virulent culture, or 100 fatal doses of the filtrate 
(which was taken from a bouillon culture and contained toxin) 
injected into guinea-pigs, was neutralized by the administration 
of the diphtheria antitoxin. A guinea-pig weighing 290.9 re¬ 
ceived an injection of 0.1 ccm. of the culture, and died on the 
sixth day; another guinea-pig of the same weight received 1.0 
ccm. of culture and 0.019 of diphtheria antitoxin, and remained 
well. Aside from these observations the characteristics of the 
bacilli taken from the pony in regard to the culture, are the 
same as the true diphtheria bacilli, so that the author concluded 
that they were identical. Should it be possible to record simi¬ 
lar cases, there would be a new step in regard to transmission of 
human diphtheria. The author also thinks that the facts which 
were observed so many times in regard to the antitoxic effects of 
the blood serum in horses, which were not treated for this pur¬ 
pose, can be easily explained in the way that the horses had 
already passed over an attack of diphtheria, during which the 
