CONTENTS. 



PAGE 



Chapter I. Intkoddction. 



Introduction '. 1 



The Conditions Essential to Life 6 



The Living Matter and the Actively Living Structure 7 



Chapter II. Respiration. 



Respiration 13 



Intramolecular Respiration 37 



Fermentations 30 



Chapter III. Nutrition. 



Nutrition 40 



The Food-materials 43 



Carbon 43 



Chlorophyll 51 



Photosynthesis 58 



Nitrogen 66 



Root-tubercle Plants 73 



Humus Plants 78 



Carnivorous Plants 81 



Parasites 85 



Ash-constituents 93 



Chapter IV. Absorption and Movement of Water. Food Dis- 

 tribution. 



Absorption 103 



Diffusion and Osmosis 108 



Means of Absorption of Nutrient Solutions 113 



Means of Transfer of Nutrient Solutions 116 



Secretion 185 



Sap-pressure and Bleeding : 130 



Transpiration 136 



Stomata and the Aerating System 143 



Gases and Movements of Gases 151 



Translocation of Foods 155 



Chapter V. Growth. 



Growth 163 



Periodicity of Growth 169 



Relations of Growth and Turgor 173 



Growth Pressures 174 



Rate of Growth 176 



Limit of Growth 179 



V 



