a line of practice that is not likely to be affected 

 by progress and invention. 



It is the aim of this work to supply this in- 

 formation in a compact, readily assimilated 

 form for both students and practitioners. Ac- 

 knowledgement must be made to Dr. D. M. 

 Campbell, editor of the American Journal of 

 Veterinary Medicine for the illustrations 

 used herein, and he wishes me to, in turn, 

 acknowledge his indebtedness to Dr. L. Enos 

 Day, in charge of the Branch Pathological 

 Laboratory of the Bureau of Animal Industry 

 of Chicago, and his assistant Dr. G. Tinsley 

 Creech, for permission to photograph a number 

 of specimens in the very excellent museum 

 maintained in connection with their laboratory. 

 And also indebtedness to the American 

 Serum Company of Kansas City for photographs 

 of their plant used in illustrating the manu- 

 facture of anti-hog cholera serum. 



A. T. KINSLEY. 

 Kansas City, December 1914. 



