NINTH ANNUAL YEAR BOOK— PART III 101 
kind of horse, and these horses have been obliged to go into the 
ring and compete with the Hackney, and naturally they have taken 
on more of that type. 
Question: Is there any Hackney blood in these winners at the 
large shows? 
Prof. Curtiss : No, it may be said that there is not one drop of 
Hackney blood in any of them ; but it is also said that these horses 
have gone abroad and been registered as Hackneys in one or two 
instances in England. 
The President : The next number on our program is an address 
by Dr. D. E. Boughman, Assistant State Veterinarian of Fort 
Dodge, on ''Hog Cholera and the Serum Treatment." 
HOG CHOLERA AND THE SERUM TREATMENT. 
D. E. BOUGHMAN, FORT DODGE, IOWA. 
Mr. President and Members of the Association: 
It affords me great pleasure to have the opportunity to address this 
association on a subject of so vital importance to the stock growers of 
this state. 
Hog cholera is a disease as most of you know which causes a greater 
loss to the farmer than all other diseases combined. Dr. Salman esti- 
mates that our annual loss from hog cholera in the United States is ten 
million dollars. As Iowa is by far the greatest hog raising state in the 
union it would be readily seen that our losses are enormous. If this dis- 
ease can be stamped out in this state, as I firmly believe it can, it will 
save millions of dollars to our farmers. It is a heavy loss as w^ell as a 
disappointment for a farmer to raise a bunch of high grade or pure 
bred hogs, to watch them grow and feed them high-priced corn in antici- 
pation of receiving a goodly sum, possibly to pay a note or a mortgage on 
his farm; then to wake up some morning and on going to his hog pen to 
find some of them refuse to eat and with positive evidence of hog cholera 
in his herd, and almost as positive assurance that he can only expenct to 
save a small per cent of his drove. 
Through the efforts of the experimental work which has been carried 
on for a number -of years by the Bureau of Animal Industry in this state 
and at Washington, we are now able to produce a- serum that will im- 
munize our hogs against this dreaded disease. The process has been pa- 
tented by this department of the bureau in such a manner that it insures 
its free use and manufacture to all people of the United States. 
In a report made by Dr. A. D. Melvin, chief of the Bureau of Animal 
Industry at the American Veterinary Medical Association, September 10, 
1908, he says it is a well known fact, that hogs which recover from an at- 
tack of hog cholera are completely immuned w^hen subsequently exposed 
