AMERICAN VETERINARY COLLEGE, 
461 
ence must therefore be attributed to specific organic characteris¬ 
tics of the animal species. 
Fifth .—From these facts it results that the guinea-pig is bet¬ 
ter than the rabbit as a test of the tuberculous nature of a lesion. 
If the rabbit is used, it will be necessary to look carefully for the 
lesions, and to be satisfied with a limited number of visceral 
lesious changes. 
And they also show that the problem of the re-inoculation of 
tuberculosis can be elucidated only upon the guinea-pig. Indeed, 
in any tuberculous inoculation affecting the lung directly, in the 
rabbit, it is impossible, in presence of pulmonary lesions, to decide 
whether these are due to the first or to the second inoculation. 
On the contrary, nothing is easier than to follow, in the guinea- 
pig, the positive effects of inoculation and re-inoculation. All 
that is necessary is to perform the first on the internal face of the 
thigh, then, when the tuberculous induration of the inguinal 
glands is well marked, to perform the second at the base of the 
ear. Thanks to the swelling of the pre-auricular and pre-scapular 
glands, it will be easy to know when the organism is under the 
effect of the second inoculation, which travels in an opposite 
direction, but towards the first. As evidence of the receptivity 
of tuberculosis, this experiment escapes all serious objection. It 
is superior to that which consists in merely reproducing a simple 
ulceration in the walls of which the bacillus of Koch is found, 
■because in certain diseases, the inoculation of an active virus to 
subjects enjoying immunity may give rise to the formation of an 
abscess, at times ulcerous, whose pus and walls contain very viru¬ 
lent micro-organisms .—Presse Veterinaire. 
AMERICAN VETERINARY COLLEGE-HOSPITAL DEPARTMENT. 
Report of Cases by J. W. Soheibler, D.Y.S., House Surgeon. 
CHRONIC NAVICULAR DISEASE—SUCCESSFUL NEUROTOMY— 
PYAEMIA—DEATH. 
This is the case of a gray mare, seven years old, recently pur¬ 
chased by her present owner, Mr. M-of this city. She had 
been for some time a sufferer from lameness, the seat of which 
