CONTENTS. 

 CHAPTER VII. 



PAGE 



OF THE STRUCTURE OF LEAVES . . 145 



CHAPTER VIII. 



OF THE FUNCTIONS OF LEAVES . . . . . . .167 



EXHALATION 168 



ABSORPTION OF FLUID BY THE LEAVES . . . ' . . 177 



ON RESPIRATION . . . . . . . 183 



FIXATION OF CARBON .186 



INFLUENCE OF VEGETATION ON THE ATMOSPHERE . . 189 



RETURN OF THE ELABORATED SAP 192 



DEVELOPMENT AND DEATH OF LEAVES 193 



CHAPTER IX. 



GENERAL REVIEW OF THE NUTRITIVE PROCESSES IN PLANTS . . 202 



CHAPTER X. 



OP THE SECRETIONS OF PLANTS . . . . . . . 225 



CHAPTER XI. 



OF THE PRODUCTION OF LIGHT, HEAT, AND ELECTRICITY BY PLANTS 260 

 OF THE MOTIONS OF PLANTS 265 



CHAPTER XII. 

 OF THE REPRODUCTION OF PLANTS . . . . . .271 



ADDENDUM ,311 



