CONTENTS. 



Chapter I. INTRODUCTION 



Chapter II. THE PIGMENTS OF THE LEAF. 



A. General Remarks 



B. The Chemistry of Chlorophyll ... 



C. The Yellow Pigments 



D. The Extraction and Preparation of the 

 Pure Pigments from the Leaf 



E. Simple Laboratory Experiments on the 

 Leaf Pigments ... 



F. Variations in the Quantity of the Leaf 

 Pigments in Different Plants and Under 

 Different Conditions 



G. Final Remarks 



Chapter III. THE PATH OP GASEOUS EXCHANGE 



Chapter IV. THE FACTORS INFLUENCING THE 

 INTAKE OF CARBON DIOXIDE. 



A. General Remarks 



B. Temperature ... 



C. Light 



D. Carbon Dioxide Supply 



E. Chlorophyll Content 



Chapter V. THE PRODUCTS OF CARBON 

 ASSIMILATION. 



A. General Remarks 



B. The Evolution of Oxygen 



C. The Carbohydrates of the Leaf ... 



D. Quantitative Estimation of the Carbo 

 hydrates of the Leaf 



E. Variations in the Carbohydrate Content 

 OF Leaves 



F. Carbohydrate Transformations in the Leaf 



Page. 



5 



12 

 17 



18 



26 



38 

 47 



51 



64 

 69 

 81 

 83 

 86 



96 



96 



103 



107 



115 

 126 



Chapter VI. ENERGY RELATIONS IN CARBON 

 ASSIMILATION. 



A. General Remarks 



B. Quantitative Estimation of Carbon 

 Assimilation by Means of the Products 



C. The Quantitative Determination of the 

 Heat of Combustion of the Products of 

 Assimilation 



131 

 132 



137 



