THE PRINCIPLES 



OF 



BACTERIOLOGY 



A PRACTICAL MANUAL FOR STUDENTS 

 AND PHYSICUNS. 



A. C. ABBOTT, M.D., 



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

 RATORY OF HYGIENE, UNIVERSITY OF PENNSYLVANIA. 



SIXTH EDITION, 

 ENLAEGED AND THOROUGHLY BEVISED. 



Wiih 777 Illustrations, of which 26 are colored. 



LEA BROTHEES & CO., 



PHILADELPHIA AND NEW YORK. 



1902. 



