Germ of the Southern Cattle Plague. 127 
could be found in their blood or tissues, nor did any develop in 
tubes inoculated from them. Inoculation upon Gophers and mice 
with pure cultivations of the troublesome cocci gave absolutely neg- 
ative results, no disturbance except a little stiffness and swelling of 
the limb occurring. 
The reason that the color of the agar agar, and especially pota- 
to cultures of the Swine Cholera-Plague germ was not affected by 
these cocci was that the former are so much larger and grow so 
much faster as not to be much affected thereby on that medium ; 
while in gelatine this whole group of germs finds a poor nutrient 
material, and grow very slowly; on the contrary, the small cocci 
grew exceedingly fast in the gelatine, and also caused its fluidifica- 
tion with greater rapidity than any pathogenetic organism with 
which I am acquainted, not excepting Finkler’s and the cheese 
“Comma.” Second, they are almost transparent, and have no 
chromogenic properties. 
That they had less specific gravity than the Southern Cattle- 
Plague germ could be determined by a microscopic examination of 
the material at the apex of the fluidification, by tipping the tubes 
gently; here the Southern Cattle Plagne organism greatly pre- 
dominated. A 
THE GROWTH OF THE GERMS OF SOUTHERN CATTLE PLAGUE 
IN Beer-Inrusion GELATINE AS COMPARED WITH 
THOSE OF THE AMERICAN SWINE PLAGUE. 
While neither of these micro-organisms cause fluidification of 
the beef-infusion gelatine, still there are certain minor points which 
have a degree of differentiating value for each of them. 
The germs of the Southern Cattle Plague have more desire for 
the air than those of the Swine Plague, they are more ærobic; while 
they spread slowly over the surface of the gelatine, still they do it more 
rapidly than the swine-plague organism. Along the line of punc- 
ture in the substance of the gelatine there is, however, no percep- 
tible difference in the deportment of the two germs. 
They each form individual colonies along the line, which gives to 
it an irregular jagged appearance, resembling the cutting edge of a 
saw. 
If anything, this surface is more dentoid in the Southern Cattle 
Plague cultures than the Swine Plague growths in beef-infusion 
gelatine, 
