114 Germ of the Southern Cattle Plague. 
tivated in an absolutely pure form upon and in artificial media. 
Gophers, or ground squirrels, have been inoculated with such culti- 
vations and died from the effects, and the same germ found in their 
blood and tissues, and in sections made from their organs, Culti- 
vations from the same have been also made, invariably showing the 
same germ as that got from the cattle. 
These results, however, do not show that this was the germ of 
Southern Cattle Plague. They only show that a germ was found 
in the tissues of Texas fever diseased animals that had fatal disease- 
producing properties. 
ow, then, can we tell that it is the specific germ of the South- 
ern Cattle Plague? 
To be able to affirm this fact positively cattle must be inoculated, 
as the ground squirrels were, with unquestionably pure cultivations, 
and the Southern Cattle Plague produced in those cattle, and the 
same germ found in their tissues and cultivated from them. We 
have done this, and can demonstrate the entire series-of facts by cul- 
tures and microscopic specimens of the tissues.! 
1Above I have stated the conditions which must be fulfilled in 
order to completely substantiate the discovery of a specific germ. 
I wish, however, to call attention to the discovery of another patho- 
genetic organism in which th diti tatp t be fulfilled 
and may never be so conclusively as we are enabled to do with germs 
of animal diseases. I allude to the germ of Yellow Fever, for which 
I claim not only the first discovery by an American, but for the only 
exact description of it. Babes saw it and partially described it, “ Les 
Bacteries-Babes-Cornil,”’ 1885, as follows :— 
‘ The capillaries of. the liver and kidneys contain great numbers of 
jointed filaments. With a Zeiss yẹ H. I., one sees these filaments to be 
made up of elliptoid-cylindrical granule united in pairs, or forming small 
clusters, in which they are united by a pale intermediate substance. 
The filaments are thus made up of diplococci or of very short segments,” 
p. 448. In the“ Comptes Rendus,” Aug. 1887, p. 289, Lacerda attempts 
to describe an organism which he says is the same as that described by 
Babes, but his description is such a lamentable failure that no one would 
recognize the germ from it. In pieces of liver and kidneys from a ¢as¢ 
of ‘‘ Undoubted Yellow Fever,” sent me by Dr. Geo. M. Sternberg, ! 
discovered the same organism described by Babes, and, no other being 
present, and the yellow fever a specific septicemia, and this organis™ 
belonging to the same group, I make no hesitancy in affirming that it 
is the germ of the yellow fever, even though unable to fulfill all the 2 
necessary postulates of exact experimentation. On the other hand, thé 
description of the germs of the Southern Cattle Plague and Swine 
Plague belonging to the same group, and an accurate knowledge of a 
several others belonging to this species, warrants the assertion that tbis { 
