THE PRINCIPLES 



OF 



BACTEEIOLOGY 



A PRACTICAL MANUAL FOR STUDENTS 

 AND PHYSICIANS 



BY 



A. C. ABBOTT, M.D. 



PROFESSOR OF HYGIENE AND BACTERIOLOGY, AND DIRECTOR OF THE LABOR- 

 ATORY OF HYGIENE, UNIVERSITY OF PENNSYLVANIA 



NINTH EDITION, THOROUGHLY REVISED 

 WITH 113 ILLUSTRATIONS, 28 OF WHICH ARE COLORED 



LEA & FEBIGER 



PHILADELPHIA AND NEW YORK 

 1915 



