THE PRINCIPLES 



OF 



BACTERIOLOGY: 



A PRACTICAL MANUAL FOR STUDENTS AND 

 PHYSICIANS. 



BY 



A. C. ABBOTT, M.D., 



FIRST ASSISTANT, LABORATORY OP HYGIENE, UNIVERSITY OP PENNSYLVANIA, 

 PHILADELPHIA. 



THIRD EDITION, ENLARGED AND THOROUGHLY 

 REVISED. 



With 98 Illustrations, of which 17 are colored. 



PHILADELPHIA: 



LEA BROTHERS & CO 

 1895. 



