viii CONTENTS 



CHAPTER IV. 

 ACTION OF EXTERNAL INFLUENCES ON BACTERIA 



SECTION 



1. INFLUENCE OF TEMPERATURE - 



2. ELECTRICITY AND MAGNETISM - 



3. LIGHT 



4. MOISTURE 



5. MECHANICAL AGITATION - 



6. GRAVITY - 



CHAPTER V. 



1. MOTILITY IN RESPONSE TO EXTERNAL STIMULI 



2. RESPIRATION OF BACTERIA 



3. THE FOOD OF BACTERIA 



4. CHIEF CONDITIONS REGULATING GROWTH 



5. PHYSIOLOGICAL CLASSIFICATION 



CHAPTER VI. 

 DISTRIBUTION OF BACTERIA 



1. BACTERIA IN THE AIR - 



Conditions determining bacterial contamination of air. 



2. BACTERIA IN WATER 



3. BACTERIA IN THE SOIL - 



CHAPTER VII. 



STERILISATION - 



Sterilisation of air disinfectants intermittent sterilisation 

 sterilisation by moist and by dry air autoclave sterilisation by 

 light sterilisation by aid of various chemical substances. 



