CONTENTS. 



sntivTim, tips of ranicles cauterised transversely, and on theii 

 upper and lower sides— Phaseolus, cauterisation and gr(ase on 

 the tips — Gossypium — Cucurbita, lips cauterised transverse!}, 

 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 tbe tips of the 

 radicles Page 23-545 



OHAPTEE XII. 



SUMMABY AKD CONCLUDING ReMAKKS. 



Nature of the eircumnutating movement — History of a germinating 

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

 highly sensitive — Emergence of the hypocotyl 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 — '1 he circumnutation of all the parts or organs — 

 Modified circumnutation — Epinastyand hyponasty — Movements 

 of climbing plants — Nyctitropic movements— M ovements excited 

 by light and gravitation — Localised sensitiveness — Resemblance 

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

 radicle acts like a biain 546-573 



Index 574-593 



