Contents ix 



PART II 



The Powers of Life 



CHAPTER VIII 



I. The task of fhysiology — a. The seat of life — 3. The energy of life — 

 4. Cells, the elements of life — S- The machinery of life — 6. Proto- 

 plasm. — 7, The chemical elements of life — 8. Growth — 9. Origin 

 of life ...... Pages 125-142 



CHAPTER IX 



THE DIVIDED LABOURS OF THE BODY 



1. Division of labour — 2. The functions of the body: Movement; 

 Nutrition ; Digestion ; Absorption ; The work of the liver and 

 the kidneys ; Respiration ; Circulation ; The changes within the 

 cells ; The activities of the nervous system — 3. Sketch of 

 Psychology ...... 143-152 



CHAPTER X 



INSTINCT 



I. General usage of the term — 2. Careful usage of the term — 3. 



Examples of instinct — 4. The origin of instinct . 153-166 



