20 
A. W. CLEMENTS. 
According to private communications, however, this organism seems 
to be identical with the one found in swine plague in England 
and Denmark. Yet I cannot come to any definite conclusion in 
the matter, as I have had no opportunity thus far to make a com¬ 
parative investigation.’’ 
This letter effectually settles the question as to whether 
American hog cholera is identical with the German schweineseuche. 
As I have said before, no one who has studied the germs of fowl 
cholera, rabbit septicaemia and swine plague, could confound with 
them for a moment the germ of hog cholera. The differences 
are radical and irreconcilable, but it has been difficult to convince 
some of our professional friends of this fact. 
To complete the chain of evidence I may add that Prof. John 
Lundgren of the Veterinary Institute of Stockholm, Sweden, has 
recently brought to my laboratory the germ of the disease as it 
exists in Sweden and he is now comparing it with the germs of 
our hog cholera. I may say now that these microbes are mor¬ 
phologically identical and that they differ in biological characters 
only to about the same extent as germs from different outbreaks 
in various sections of the United States are found to differ from 
each other. The lesions of the disease correspond to our hog 
cholera. 
We may conclude, therefore, that the outbreaks of swine disease 
during the last year in Sweden, Denmark, and at Paris and Mar¬ 
seilles in France, were practically identical with our hog cholera, 
and that the German schweineseuche is an entirely different and 
distinct disease. 
DESCRIPTION OF SOME SPECIMENS OF PLEURO-PNEUMONIA 
CONTAGIOSA. 
Presented by A. W. Clements, Y.S. 
(Abstract of remarks at the semi-annual meeting of the United States Yetei inary 
Medical Association at Baltimore, March 20, 1888.) 
Mr. President and Gentlemen: —Pleuro-pneumonia contagiosa 
is generally defined to be a contagious or infectious disease, mani¬ 
festing itself by certain characteristic lung lesions, and generally 
