17o 
D. P. YONKERMAN. 
specific character of these ulcerative, neoplastic conditions must 
fall to the ground entirely without other argumentation, as they 
will then be found to occur in two entirely different diseases. 
The presence of the different micro-organisms in the two dis¬ 
eases can alone decide this question. 
So far as our American swine plague goes, it knocks the bot¬ 
tom out of the theory of the Koch school with regard to the 
bacilli of tuberculosis being the cause of caseation, and, as I have 
already shown in another paper —(Journal of Com. Med. 1886) 
it is really due to an incipient weakness in the cells, aided by 
anaemic conditions. 
{To be continued .) 
THE VETERINARIAN AS A MEMBER OF SOCIETY. 
By D. P. Yonkerman, Cleveland, O. 
As the great human family becomes multiplied aud civiliza¬ 
tion rapidly advances, the demands of life become increased and 
more complicated ; but intelligence, which advances with civiliza¬ 
tion, redoubles the efforts made to maintain the equilibrium be¬ 
tween the growth of populations and the necessary supply of 
food. 
It is these demands which have brought the cultivation of the 
soil to such perfection—which have reclaimed lands not only bar¬ 
ren, but positively injurious, because they were the sources of 
pernicious maladies and the laboratories of pestilential emana¬ 
tions. 
These demands have also perfected and enormously increased 
in number the domesticated animals so essential to mankind, and 
it is entirely owing to them that commerce has become so ex¬ 
tended between countries as to greatly diminish the chances of 
the occurrence of those terrible famines which so frequently 
ushered in the plagues of man and beast. 
But on the other hand, as civilization removes or tends to re¬ 
move the ancient generators of disease, it brings about changes 
which are not without drawbacks. The more artificial conditions 
