A TEXT-BOOK OF 



B ACTE RI OLOGY 



A PRACTICAL TREATISE FOR STUDENTS A ( 

 AND PRACTITIONERS OF MEDICINE 



BY 



PHILIP HANSON^HISS, JR., M.D. 



LATE PROFESSOR OF BACTERIOLOGY, COLLEGE OF PHYSICIANS AND SURGEONS, 

 COLUMBIA UNIVERSITY, NEW YORK CITY 



AND 



HANS ZINSSER, M.D. 



PROFESSOR OF BACTERIOLOGY, COLLEGE OF PHYSICIANS AND SURGEONS, COLUMBIA UNI- 

 VERSITY, NEW YORK CITY; BACTERIOLOGIST TO THE PRESBYTERIAN HOSPITAL; 



FORMERLY PROFESSOR OF BACTERIOLOGY AND IMMUNITY, STANFORD 



UNIVERSITY, CALIFORNIA; MAJOR, MEDICAL OFFICERS' 

 RESERVE CORPS, U. S. A. 



WITH A SECTION ON THE PATHOGENIC PROTOZOA 



BY 



FREDERICK F. RUSSELL, M.D. 



MAJOR MEDICAL CORPS, U. S. A.; FORMERLY PROFESSOR OF BACTERIOLOGY AND 

 PATHOLOGY, ARMY MEDICAL SCHOOL AND GEORGE WASHINGTON UNIVERSITY 



WITH ONE HUNDRED AND NINETY-EIGHT ILLUSTRATIONS IN THE 

 TEXT, SOME OF WHICH ARE COLORED 



FOURTH EDITION 



Q ' 



NEW YORK AND LONDON 

 D. APPLETON AND COMPANY 



1919 



154103 



