PREFACE 



The experience of the writer in teaching, and 

 in the manufacture and distribution of anti-hog 

 cholera serum, no less than in practice, has 

 forcibly impressed upon him the need of the 

 veterinary profession for more general knowl- 

 edge of the diseases of swine. 



They are not few who maintain that vet- 

 erinary practice in the future will be concerned 

 largely with the food-producing animals. The 

 automobile has already supplanted most of the 

 fancy driving horses; the auto-truck does much 

 that would otherwise be accomplished by 

 horses; and predictions are rife that the gaso- 

 lene tractor will soon be made practicable for 

 work on small farms. All things considered it 

 seems probable that the equine population of 

 the country is destined to increase but slowly if 

 at all. The keeping of pet animals, including 

 dogs and cats, is being looked upon more and 

 more as an insanitary practice, while the farm 

 dog -and the roaming cur are becoming more 

 and more the object of antagonistic legislation. 

 Contrasted with the foregoing, the increasing 

 price of meat food products makes it seem de- 

 sirable that veterinarians in general better equip 

 themselves for the treatment of the ailments of 

 food producing animals and thus qualify them- 

 selves to render greater service to the public in 



