CONTENTS. 



eativum, tips of radicles cauterised transversely, and on theii 

 upper and lower sides— Phaseolus, cauterisation and grease on 

 the tips — Gossypium— Cucurbita, tips cauterised transversely, 

 and on their upper and lower sides — Zea, tips cauterised — Con- 

 cluding remarks and summary of chapter — Advantages of the 

 sensibility to geotropism being localised in the tips of the 

 radicles Page 23-545 



CHAPTEE XIL 



Summary akd Concluding Ebmaeks. 



Nature of the circum nutating movement — History of a germinating 

 seed — The radicle first protrudes and circumnutates — ^Its tip 

 highly sensitive — Emergence of the hypoootyl or of the epicotyl 

 from the grcund under the form of an arch — Its circumnutation 

 and that of the cotyledons — The seedling throws up a leaf- 

 bearing stem — The circumnutation of all the parts or organs- 

 Modified circumnutation — Epinasty and hyponasty — Movements 

 of climbing plants — Nyotitropic movements — Movements excited 

 by light and gi'avitation — ^Localised sensitiveness — Eesemblance 

 between the movements of plants and animals — The tip of the. 

 radicle acts like a brain 546-573 



Index 574-593 



