NINTH ANNUAL YEAR BOOK -PART VI 239 
their work out and then turned to the station vetti'inarian to check their 
work so as to be sure they had not made a mistake. They wanted to be 
checked by interested parties. We commenced along in October with 
some field experiments with the serum and blood from the government 
station. We bought some pigs from a leading stock farm and com- 
menced this test. The first test was not very satisfactory. It didn't 
test out as we thought it ought and this is one point that I want to 
emphasize because in a little while some of the manufacturing concerns 
will take up this subject and put on the market a hog cholera cure of 
inferior material, unless the plan is followed out as outlined at the 
present time. The blood must be tested, the serum must be tested. 
In this first experiment the blood was tested, but it was not virulent 
and in this test the pigs died. Now, in the second test we took some 
of these same animals that we had vaccinated, some that were not ex- 
posed and took them to a Held where a man was losing six or eight or 
ten a day. We took twenty hogs to that outbreak, and they were 
vaccinated at different times to see if we could determine upon a set 
time when hogs could be vaccinated and be immune to an outbreak. In 
this outbreak we used four animals for checks and sixteen were vac- 
cinated either with serum or virulent blood. In this outbreak one of 
the checked pigs (one that has had no treatment at all is called a check) 
died in five days. Two more died a little later and finally the fourth. 
One serum pig died, but of the sixteen pigs that we had in that out- 
break fifteen were never off their feed. We had another test where we 
put larger hogs in the government exposure pen. They had I think 
two or three animals in the pen at that time. We had four checks. 
Three of the checks became sick and died and the post-mortem showed 
hog cholera. Then three animals got sick but recovered. The other twelve 
that were vaccinated never became sick. Now, that check in a general 
way the test and proves conclusively enough to my mind that there is 
something in this vaccination if it is properly carried out. In the first 
test we went wrong. The blood was tested but was not virulent. It 
must be collected at a certain time and used in a certain way. The 
serum must be tested. There are some questions that will come up re- 
garding the distribution of this material and the manufacture of it. We 
get many inquiries at the college asking for serum, to test it, to send some, 
or can a man use it himself. Druggists write for it. I do not believe 
that at the present time the serum is safe in the hands of the laymen. 
It is not safe in the hands of anybody but those who have had some 
instruction along that line and understand the use of those products. 
Just in a general way I will show you the use of this and you will see 
why it is important that some one who is acquainted with the manufacture 
of it or knows of the nature of the material should handle it. If you have 
an outbreak it is not advisable to use serum and virulent blood because 
you have your natural exposure then. You use the serum then and let 
your hogs go right with the hogs that are sick. If you do not have it. if 
you want to go to the fair and do not want to take it home with you, 
then you would use the serum and virulent blood and at the end of the 
time of exposure you would have your animals immune. It will not do 
