Foreword — (Continued) 



must also have stimulus for growth. And in 

 society's increasing complexity they must be 

 given the means to cope with the mounting de- 

 mands for specific skills and specialized infor- 

 mation. We recognize these needs. Our varied 

 training programs are designed to meet the 

 challenge. 



Periodically, in order to perform effectively 

 in the present, as well as to plan for the future, 

 it becomes necessary to pause for an examina- 

 tion of the past. This handbook, intended for 

 the use of those intimately concerned with the 

 health of the livestock of the Nation, is dedi- 

 cated to that purpose. 



R. J. Anderson, Director 

 Animal Disease Eradication 

 Division 



