Swine Growers' Session. 97 



but I think that when we learn how to grow it, when we learn how 

 to treat the different kinds of soil, that we will be able to grow 

 alfalfa as widely as it is now grown in Nebraska and Kansas. 



Q. Is it not a dangerous process to put alfalfa on tile- 

 drained land? 



Prof. Miller— No, I think not. Wing Bros., the big alfalfa 

 growers, have all their alfalfa land under-drained, and I have 

 heard of no trouble. 



Mr — I think in the case of the gentleman from 



Pettis county, he ought to under-drain his soil. It is better than 

 manuring. Under-draining is the main point in any soil of that 

 kind. 



Prof. Miller — Yes, that is true; and we should always begin 

 in a small way to grow alfalfa. If you sow 50 acres you are al- 

 most sure to fail. It is better to start with 2 acres rather than 50. 



IMMUNIZATION OF SWINE AGAINST HOG CHOLERA. 



J. W. Oonnaway, Veterinarian, Oollege of Agriculture and Experiment Station 



University of Missouri. 



Gentlemen of the Live Stock Breeders' Association: 



The economic relation of "hog cholera" to the swine industry 

 is so important that the discussion of this subject is always in 

 order at a meeting of this kind; and I am glad to be able to give 

 you some hope that the losses from this plague will in the near 

 future be greatly diminished by means of "preventive inoculation." 

 With the possible exception of tuberculosis, the "infectious 

 diseases of swine" have engaged the attention of the farming pub- 

 lic and of veterinary scientists to a greater extent than any other 

 disease affecting farm animals. 



Nearly thirty years ago, and before the organization of the 

 United States Bureau of Animal Industry, the Commissioner of 

 Agriculture caused important investigations to be made into the 

 nature of these diseases. Dr. D. E. Salmon, who was later ap- 

 pointed Chief of the Bureau of Animal Industry, Dr. James Law of 

 Cornell University, and Dr. H. J. Detmers were appointed to carry 

 on investigations, independently, in different parts of the country. 

 The reports of their investigations left but little to be added in 

 the way of description of the gross objective features of the dis- 

 ease or diseases, which we now know as "hog-cholera" and "swine 



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