vi TABLE OF CONTENTS. 



CHAPTER IV. 



FERMENTS AND FERMENTATION. PAGE 



1. Organic Ferments 79 



2. Inorganic Ferments 93 



CHAPTER V. 



THE ACTION OP THE ENZYMES FOUND IN THE HUMAN ALIMENTARY 

 TRACT. 



1. Amylase 99 



2. Maltase 104 



3. Caseinase. . .110 



CHAPTER VI. 



THE ACTION OF THE ENZYMES FOUND IN THE HUMAN ALIMENTARY 

 TRACT (Continued). 



4. Acid-proteinase 114 



5. Alkali-proteinase 122 



CHAPTER VII. 



THE ACTION OF THE ENZYMES FOUND IN THE HUMAN ALIMENTARY 

 TRACT (Continued'). 



6. Quantitative Estimation of the Proteinases 129 



7. Antiproteinase 133 



8. Why the Alimentary Tract Does not Digest Itself 135 



9. The Reversible Action of the Proteinases.. . 140 



CHAPTER VIH. 



THE ACTION OF THE ENZYMES FOUND IN THE HUMAN ALIMENTARY 

 TRACT (Concluded). 



10. Protease 146 



11. Lipase 149 



12. Sucrase 153 



13. Lactase 157 



14. Arginase 158 



CHAPTER IX. 



THE BACTERIA OF THE ALIMENTARY TRACT . 160 



