INVESTIGATIONS OF THE 
BUREAU OF ANIMAL INDUSTRY. 545 
duced here because if there ever was a case of swine pldgue 
which absolutely corresponded in every particular to Mr. Sal¬ 
mons ‘ hog cholera/ this one did. Hence the most exact 
search was made in seeking micro-organisms, but in the blood, 
in the spleen, in the liver, in the lymph-glands, both Dr. Rob¬ 
erts or myself could not find any other organism than that 
described bv me in this report as the only germ of swine 
plague. Cultures were made and the same organism de¬ 
veloped. Dr. Roberts being here with me, and interested in 
this work, as well as being a Regent of the University, he 
was doubly interested in endeavoring to find anything like 
the organism described by Mr. Salmon as occurring, accord¬ 
ing to him, in just such cases. Here was no room to say with 
Salmon, the lungs being affected, the germ of swine plague 
and that of hog cholora may both be present. After spend¬ 
ing more than an hour in examining and re-examining the 
fresh organs, all of which were kept carefully covered, ex¬ 
cept for the moment necessary to clip out a small piece of 
tissue, we gave up the search, finding nothing but the one 
organism, and nothing resembling in any way the one de¬ 
scribed by Mr. Salmon in 1885 as the cause of swine plague, 
which had no polar staining whatever, and in 1886 as the cause 
of his ‘ hog cholera.’ 
“ Such testimony as this should be conclusive. A mistake 
is absolutely impossible under the circumstances. This result 
simply corresponds with over five hundred such experiences. 
(L. c. p. 259.) 
Finally, referring to my experiments in producing im¬ 
munity in pigeons with the chemical products developed 
during the growth of the hog cholera,bacterium, he writes: 
“ Hueppe seems to be absolutely unaware of the fact that 
the experiments he refers to were published in Mr. Salmon’s 
report of 1885, when he said that the peculiar organism, which 
he then called the ‘ new microbe of swine plague,’ was en¬ 
tirely different from that of Schutz. Hueppe is also unaware 
of the fact that that same organism suddenly became the cause 
of Mr. Salmon’s ‘ hog cholera ’ in 1886 as he is that that same 
organism has no existence in the American swine plague. 
(L. c. p. 394-) 
