SAUNDERS' QUESTION-COMPENDS, No. 20 



ESSENTIALS 



OF 



BACTERIOLOGY 



BEING A 



CONCISE AND SYSTEMATIC INTRODUCTION TO THE 

 STUDY OF BACTERIA AND ALLIED MICROORGANISMS 



' >; ; M:. y^BALb, M. D, 



PROFESSOR' OF' PATHOLOGY, NEW YORK MEDICAL COLLEGE AND HOSPITAL FOR 



WOMEN, NEW YORK CITY ; MEMBER OF THE ACADEMY OF NATURAL 



SCIENCES OF PHILADELPHIA; FORMERLY INSTRUCTOR IN 



BACTERIOLOGY AT THE PHILADELPHIA POLYCLINIC. 



ASSISTED BY 



PAUL G. WESTON, M. D. 



PATHOLOGIST STATE HOSPITAL FOR INSANE AT WARREN, PA. 



SEVENTH EDITION, THOROUGHLY REVISED 

 With 118 Illustrations, some in Colors 



PHILADELPHIA AND LONDON 



W. B. SAUNDERS COMPANY 



1918 



