THE PRINCIPLES 



OF 



BACTEEIOLOGT 



A PRACTICAL MANUAL FOR STUDENTS 

 AND PHYSICIANS 



BY 



A. C. ABBOTT, M.D. 



PROFESSOR OF HYGIENE AND BACTERIOLOGY, AND DIRECTOR OF THE SCHOOL OF 

 HYGIENE AND PUBLIC HEALTH, UNIVERSITY OF PENNSYLVANIA 



TENTH EDITION, THOROUGHLY REVISED 



WITH 121 ILLUSTRATIONS, 31 OF WHICH ARE COLORED 



LEA & FEBIGER 



PHILADELPHIA AND NEW YORK 



