COMMON DISEASES OF SWINE 331 
Association, Dr. A. D, Melvin, Chief of the Bureau of Animal 
Industry, U. S. Department of Agriculture, gives results of 
extensive tests, involving several thousand hogs upon farms, 
under practical conditions. In the course of his address, 
Courtesy Tennessee Department of Agriculture. 
Fic. 95.—Injecting serum behind ear (large hog). 
Dr. Melvin makes the following statements regarding the 
experiments: 
“Tn no cases were any of the ordinary methods of 
combating hog cholera by disinfection and separation of the 
sick from the apparently healthy practised. Where dis- 
ease was present at the time of treatment, the treated were 
