TO DANIEL ELMER SALMON 



LARGELY THROUGH WHOSE LABORS THERE WAS ES- 

 TABLLSHED LX THE UNITED STATES DEPARTMENT OF 

 AGRICULTURE THE BUREAU OF ANIMAL INDUSTRY 

 WHICH HAS MADE POSSIBLE EXTENSIVE INVESTIGA- 

 TIONS INTO THE NATURE OF EPIZOOTIC DISEASES IN 

 AMERICA AND WHO FOR EIGHTEEN YEARS HAS DI- 

 RECTED THESE INVESTIGATIONS 



THIS VOLUME IS DEDICATED. 



1022G7 



