TABLE OF CONTENTS 



CHAPTER I 



PAGE 



The Bacteria in Natural Waters i 



CHAPTER II 

 The Quantitative Bacteriological Examixation of Water.. 29 



CHAPTER III 



The Interpretation of the Quantitatixt; Bacteriological 

 Examination 51 



CHAPTER IV 



Determination of the Number of Organisms Developen'g at 

 THE Body Temperature 61 



CHAPTER V 



The Isolation of Specific Pathogenes from Water 74 



CHAPTER VI 



The Colon Group of Bacilli and Methods for Their Isolation 99 



xiii 



