PRACTICAL 

 DAIRY BACTERIOLOGY 



PREPARED FOR THE USE OF STUDENTS 

 DAIRYMEN, AND ALL INTERESTED IN 

 THE PROBLEMS OF THE RELATION OF 

 MILK TO PUBLIC HEALTH : : : : 



By 

 H. W. CONN, Ph.D. 



Professor of Biology of Wesleyan University and Bacferioiogist of 



the State Board of Health of Connecticut 



ILLUSTRA TED 



NEW YORK 

 ORANGE JUDD COMPANY 



LONDON 



KEGAN PAUL, TRENCH, TRUBNER & Co., LIMITED 

 1907 



OF THE 



t UNIVERSITY 



