VI PREFACE 



The result is that there are many veterinarians who 

 will not attempt to cope with the disease, or who, 

 making the attempt, feel the need for guidance. 



This volume is in no sense a compilation. For the 

 most part it reflects personal experiences gained during 

 ten years of intimate contact with hog cholera in the 

 capacity of practicing and consulting veterinarian, anti- 

 hog-cholera serum producer and research worker, but 

 acknowledgment is due many other members of the 

 veterinary profession whose researches and observations 

 have revealed many of the foundation facts on which the 

 subject matter rests. For statistical and other data I 

 have consulted other authors freely, relying for sta- 

 tistics especially on the numerous and excellent publi- 

 cations of the United States Bureau of Animal Industry. 

 I am indebted to Dr. E. A. Cahill, Director of the Pit- 

 man-Moore Biological Laboratories, Zionsville, Indiana, 

 for some of the illustrations. 



Dr. V. A. Moore, Dean of the New York State Veteri- 

 nary College at Cornell University, and Dr. J. W. Benner 

 of the College Experiment Station Staff have read the 

 manuscript, and each has offered many valuable sug- 

 gestions which are deeply appreciated. 



Great care has been taken to make the book a conserva- 

 tive and accurate guide for the practicing veterinarian 

 who must accept farm conditions as he finds them and 

 handle hog cholera so as to secure and retain the con- 

 fidence of his clients. If among other imperfections 

 there are departures from this ideal I trust that my 

 readers will direct my attention to them. 



R. R. B. 



