THE NATURE OF THE AMERICAN SWINE PLAGUE. 455 
two-thirds of the hogs present. (If only a small number of hogs 
are present the trench should be dug deep enough to have six 
feet of earth over all the carcasses when covered.) As soon as 
any hogs have died the carcasses should be at once removed and 
some crude petroleum poured upon it; it should then be covered 
with a layer of quicklime and six inches of earth. The same 
should be done with each carcass. When the outbreak has come 
to an end the entire mass should be covered with six inches of 
quicklime and the trench filled up. No more hogs should be 
put into a single trench than would allow of six feet of earth to 
cover the carcasses. Such burial place should be kept securely 
fenced in for at least two years and sown down with some vigor¬ 
ously growing herbage. 
When the situation of a hog-yard or run is such that a suita¬ 
ble burial place within or adjacent to the same cannot be had on 
account of running streams, wells or some other circumstance, a 
place must be selected as near as possible. The dead hogs should 
be carefully placed in a wagon and never dragged over the ground 
when being conveyed to such burial places. Such wagons should 
be cleaned and disinfected directly after being used for such 
purpQses. 
When can an outbreak of swine-plague be declared ended 
and the infested premises be declared free from the disease f 
When all the diseased hogs have been buried ; when the cleans¬ 
ing and disinfection of the pens, etc., and plowing up of the 
grounds of the infested yards has been performed according to 
regulation; or when there has not been a single symptom of dis¬ 
ease ’among the remaining hogs after thirty days have elapsed 
from the complete recovery of the last sick hog, or no more sick¬ 
ness has occurred since the last sick hog was killed. 
The above has reference only to the hogs remaining in an in¬ 
fested herd after the disease has run its course. 
The treatment of such pens or yards, or the course to be fol¬ 
lowed in placing healthy pigs in the same, or upon the same prem¬ 
ises, has already been given. 
REMUNERATION. 
Under what circumstances, or upon what conditions should 
