yi CONTENTS. 



PART II, 



NUTRITION IN PLANTS AND ANIMALS. 



CHAPTER V. 



On the Absorption and Cibculation of Food in Plants 

 AND Animals, - 85 



CHAPTBK VI. 



On the Nutritite Processes of Respiration and Assim- 

 ilation, - 104 



PART 111. 



BEPRODUCTION IN PLANTS AND ANIMALS. 



CHAPTER VII. 



General Considerations on Reproduction in Plants 



and Animals, - 123 



Hybridization, 131 



CHAPTER VIII. 

 On the Essential and Consecutive Phenomena of Re- 

 production, 135 



PART IV. 



ON THE GEOGRAPHICAL DISTRIBUTION OF PLANTS 

 AND ANIMALS. 



CHAPTER IX. 



On the laws, according to which Plants and Animals 



ARE Distributed on the Surface of the Globe, 153 



CHAPTER X. 



On the Geological Succession of Plants and Animals, 



OR THEIR Distribution in Time, 168 



1* 



