xii CONTENTS (PART II) 



CHAPTER XXIX 



Slugs 



Land and Pond'Snails . 



CM 



Collections of Shells . 



OBSERVATIONAL LESSON XXVIII 

 Spines and Prickles 



CHAPTER XXX 



The Defence of Leaves and Stems Poisons Spines and Prickles Bristles and 



QO 



Stinging Hairs 



The Means of Defence of Roots 

 How Plants heal their Wounds 

 Trees in Summer 



OBSERVATIONAL LESSON XXIX 

 PART I The Movements of Plants 

 PART II The Sun (Continued} 

 PART III A Goldfish . 



CHAPTER XXXI 

 Climbing Plants 



OBSERVATIONAL LESSON XXX 



PART I The Movements of Plants (Continued, second investigation) . .112 



PART II A Dove ... .114 



CHAPTER XXXII 

 Plant Construction . .115 



OBSERVATIONAL LESSON XXXI 



PART I The Movements of Plants (Continued, third investigation} . .117 



PART II The Sun (Continued} 

 PART III A Gall 

 PART IV The Silkworm (Continued, third investigation} 



