CONTENTS 



CHAP. PAGE 



I. INTRODUCTION . 1 



II. THE COLLOIDAL STATE 11 



III. PLANT ENZYMES 18 



IV. CHLOROPHYLL 27 



V. CARBOHYDRATES . 42 



VI. THE VEGETABLE ACIDS 81 



VII. FATS AND ALLIED SUBSTANCES ... 89 



VIII. AROMATIC COMPOUNDS 101 



IX. PROTEINS AND AMINO-ACIDS . . . . 132 



X. GLUCOSIDES 157 



XL PLANT BASES 169 



INDEX 183 



Ml I 



