SAUNDERS' QUESTION COMPENDS, NO. 20. 



ESSENTIALS OF BACTERIOLOGY: 



BEING A 



CONCISE AND SYSTEMATIC INTRODUCTION TO THE 

 STUDY OF MICRO-ORGANISMS 



FOR THE USE OF 



STUDENTS AND PRACTITIONERS. 



BY 



M. V. BALL, M.D., 



LATE RESIDENT PHYSICIAN GERMAN HOSPITAL, PHILADELPHIA; ASSISTANT IN 

 MICROSCOPY, NIAGARA UNIVERSITY, BUFFALO, NEW YORK, ETC. 



WITH SEVENTY-SEVEN ILLUSTRATIONS, SOME IN COLORS, 



PHILADELPHIA: 



W. B. S AU N DE ES, 



913 WALNUT STKEET. 

 1891. 



