viii CONTENTS. 



LECTURE VI. 



PAGE 



THE MOVEMENT OF WATER IN PLANTS .... 89102 



LECTURE VII. 

 TRANSPIRATION . ." 1 03 120 



LECTURE VIII. 

 THE FOOD OF PLANTS . ... . . . . . 121138 



LECTURE IX. 



THE METABOLISM OF PLANTS . . . . . . 139161 



1. The Formation of Non-nitrogenous Organic Sub- 



stance, 140 



2. The Formation of Nitrogenous Organic Substance, 148 



3. The Function of Chlorophyll, 1 5 1 



4. The Action of Light, 157 



LECTURE X. 



METABOLISM (continued} 162186 



5. The Distribution of Organic Substance in the 



Plant, 162 



LECTURE XI. 



METABOLISM (continued} 187 215 



6. The Metabolic Processes, 187 



LECTURE XII. 



METABOLISM (continued} 216 250 



7. The Products of Metabolism, 216 



LECTURE XIII. 



METABOLISM (continued} 251 287 



8. The Supply of Energy, 251 



Light, 252 



Heat, 268 



LECTURE XIV. 



METABOLISM (continued} 288330 



9. The Expenditure of Energy, 288 



1. The Accumulation of Energy, 289 



2. The Dissipation of Energy, 290 



