28 
W. H. BIRCHMOKE. 
changes its aspect, becomes a little larger and approximates the 
figure 8, without the filiform elongation of some of its cultures. 
If we inoculate swine with the blood of the last rabbits, as 
compared with that of the first series, we shall observe that the 
virulency has been progressively diminishing from the first rabbit 
to the following ones. Very soon the blood of the rabbit inocu¬ 
lated to swine fails to kill, though it produces sickness. After 
their recovery, they are vaccinated against mortal hog cholera. 
This new method for the attenuation of some species of 
viruses, even the most virulent, without doubt merits the attention 
of the Academy .—Gazette Medicate. 
EXTRACTS, 
CANCER IN DOMESTICATED ANIMALS. 
Notes on Comparative Pathology, By W. H, Bikchmoke, M.D., 
Carbondale, Kansas. 
At present, when the relations between the diseases of man 
and his dependent cousins are being realized and brought to 
notice, and influencing many minds for their advancement in 
learning and to the broadening of their field of view, an account 
of cases such as the following needs no apology for intruding it¬ 
self on the time of the thinking portion of the medical profession. 
Their clinical interest is not so certain, but a priori it may be 
questioned if the food from animals in whose bodies degraded 
material processes are going on can be any more edifying than 
the mental pabulum of the same description is by some held to be. 
If the existence -of a mammary cancer in a woman would, in the 
judgment of a thoughtful practitioner, be good cause for doubt¬ 
ing the advisability, surely the existence of cancerous ulceration 
in the udder of a cow would be good cause for the disallowance 
of the use of her milk for the food of young children. 
The investigation whose results this paper offers was under¬ 
taken to obtain material for the inflammatory origin of tumors. 
But time went on its way, the paper was never written, and now 
it is offered as a contribution to the general stock-in-trade of the 
