CONTENTS 

 OF THE SECOND VOLUME. 



PART II.— THE VITAL FUNCTIONS. 



Page 



Chapter I — Objects of Nutrition 1 



Chapter II. — Nutrition in Vegetables 15 



§ I. Food of Plants 15 



2. Absorption of Nutriment by Plants 19 



3. Exhalation 27 



4. Aeration of the Sap 29 



5. Return of the Sap 36 



6. Secretion in Vegetables 45 



7. Excretion in Vegetables 51 



Chapter III. — Animal Nutrition in general 57 



§ 1 . Food of Animals 57 



2. Series of Vital Functions 69 



Chapter IV. — Nutrition in the lower orders of 

 Animals 74 



Chapter V. — Nutrition in the higher orders of 

 Animals 104 



Chapter VI. — Preparation of Food 113 



§ 1 . Prehension of Liquid Food 113 



2. Prehension of Solid Food 117 



3. Mastication by means of Teeth 140 



