CONTENTS 



SECTION I. THE FORM AND OCCURRENCE OF BACTERIA 



EXERCISE PAGE 



1. THE FORMS OF BACTERIA 2 



2. TYPES OF BACTERIA 2 



3. SPORES OF. BACTERIA 2 



4. MOTILITY OF BACTERIA 4 



5. ZOOGLCEA FORMS 4 



6. COMPARISON OF THE SHAPES OF YEASTS AND MOLD FUNGI 



WITH BACTERIA 5 



SECTION II. THE NUTRITION OF BACTERIA 



7. PREPARATION OF NUTRIENT AGAR 6 



8. PREPARATION OF BOUILLON 9 



9. PREPARATION OF NUTRIENT GELATIN 10 



10. PREPARATION OF POTATOES FOR CULTURES . 11 



SECTION III. STERILIZATION 



11. STERILIZATION OF CULTURE MEDIA WITH MOIST HEAT IN THE 



ARNOLD TYPE OF STERILIZER 12 



12. STERILIZATION OF CULTURE MEDIA WITH MOIST HKAT IN THK 



AUTOCLAVE i:-j 



13. RESULTS OF FRACTIONAL STERILIZATION 14 



14. STERILIZATION OF DISHES AND INSTRUMENTS BY Ditv HKAT !"> 



SECTION IV. RELATION OF BACTERIA TO FACTORS OF 

 THE PHYSICAL ENVIRONMENT 



15. RELATION OF BACTERIA TO OXYGEN (GROWTH) 16 



16. RELATION OF BACTERIA TO OXYGEN (MOTILITY) . . . . . 16 



17. EFFECT OF LIGHT UPON BACTERIA 16 



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