REPORTS OF CASES. 
217 
the proportion of seven out of ten. This fact, with others that 
we have already published, show that eacli species of animal has 
a receptivity of its own for each breed of bacteridies, which can 
be created by artificial cultures. 
The diminution of the virulency of the spores of bacteridie, 
and their death under the action of diluted sulphuric acid, take 
place so much more rapidly when the temperature is higher and 
the acid more concentrated, and so much slower when the tern- 
perature is low and the acid solution more diluted —Academie 
des Sciences. 
REPORTS OF CASES, 
(From the Hospital Department of the American Veterinary College.) 
RAPID AMPUTATION OF AN EXTRA SCROTAL CHAMPIGNON BY 
MEANS OF THE ELASTIC LIGATURE. 
By W. D. Critoherson, D.V.S., House Surgeon. 
The subject upon which this operation was performed was a 
dark brown gelding, seven years of age, and used for driving 
purposes. According to the history he has had a sore on his 
scrotum which had been discharging for the past three months. 
At the time of admission to the hospital the animal was in 
the following condition : External appearance very good; body 
rather fleshy; in. good spirits; in fact all the functions seem to 
be normal. There is neither lameness or stiffness shown in 
action. 
The scrotal region is considerably swollen, hard, painless on 
manipulation, and the seat of several fistulous openings, varying 
in depth, which run into the enlargement. 
Upon the center of the left side there is an extra scrotal tumor, 
having a circumference of about thirteen inches, and a base 
attached by a peduncle to the scrotum, which is about six inches 
in diameter. This abnormal growth is round, smooth, and bleed¬ 
ing here and there. 
After having been prepared, and a dose of chloral adminis¬ 
tered at two o’clock p.m. on the 3d of Julv, he was cast and 
secured. 
