CONTENTS 



SECTION I. THE FORM AND OCCURRENCE OF BACTERIA 



EXERCISE PAGE 



1. The Forms op Bacteria 2 



2. Types of Bacteria 2 



3. Spores op Bacteria 2 



4. Motility op 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 op Nutrient Agar 6 



8. Preparation op Bouillon .... .... 9 



9. Preparation op 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 op Sterilizer 12 



12. Sterilization of Culture Media with Moist Heat in the 



Autoclave 13 



13. Results op Fractional Sterilization 14 



14. Sterilization of Dishes and Instruments by Dry Heat 15 



SECTION IV. RELATION OF BACTERIA TO FACTORS OF 

 THE PHYSICAL ENVIRONMENT 



15. Relation op Bacteria to Oxygen (Growth) 16 



16. Relation of Bacteria to Oxygen (Motility) 16 



17. Effect of Light upon Bacteria 16 



V 



