THE NATURE OF THE AMERICAN SWINE PLAGUE. 
411 
To combat an enemy, we must first discover its nature and 
resources. 
These have been fully demonstrated by my researches in 
Nebraska, the only assistance I have found being in the work of 
Dr. Detmers, which so largely supports my own, though done 
previously. 
The preventive treatment of swine-plague must be directed, 
then, to: 
1: All places where the disease exists, or has existed within 
two years. 
2. All sick or exposed swire, or any persons, animals or ob¬ 
jects that may have been in contact with such. 
3. The conveyances of common carriers. 
4. The burial places of diseased swine. 
5. The contamination of waterways. 
6. Controlling importation. 
7. Placarding, with signs marked “ Swine-Plague” (white 
letters on black ground), every place where the disease exists or 
has existed, until declared free from all suspicion by the State 
authorities. 
This regulative and hygienic method of prevention is directed 
entirely to the supporting or secondary causes of swine-plague. 
Its purpose is to.prevent the action of the inciting cause. 
IF hen Swine-Plague Exists in Adjoining or Distant States. 
In this regard there are two essential points which demand 
earnest consideration on the part of the respective State author¬ 
ities : 
1st. Swine-plagne introduced by diseased swine from other 
localities. 
2d. Swine-plague introduced by means of uncleansed and non- 
disinfected railroad cars or other conveyances, the property of 
common carriers. 
Let us consider the first of these conditions. 
All importation of swine from another State, either for stock 
or feeding purposes, whether or not such imported swine come 
from States or localities in which swipe-plague exists, should by 
