VI CONTENTS. 



gean hypocotyls Circumnutation of hypocotyls and epicotyls 

 when erect Circumnutation of cotyledons Pulvini or joints of 

 cotyledons, duration of their activity, rudimentary in Oxalis 

 corniculata, their development Sensitiveness of cotyledons to 

 light and consequent disturbance of their periodic movements 

 Sensitiveness of cotyledons to contact Page 07-128 



CHAPTEE III. 



SENSITIVENESS OF THE APEX OF THE RADICLE TO CONTACT AND 

 TO OTHER IRRITANTS. 



Manner in which radicles bend when they encounter an obstacle in 

 the soil Vicia faba, tips of radicles highly sensitive to con- 

 tact and other irritants Effects of too high a temperature 

 Power of discriminating between objects attached on opposite 

 sides Tips of secondary radicles sensitive Fisum, tips of 

 radicles sensitive Effects of such sensitiveness in overcoming 

 geotropism Secondary radicles Phaseolus, tips of radicles 

 hardly sensitive to contact, but highly sensitive to caustic and 

 to the removal of a slice Tropseolum Gossypiura Cucurbita 

 Eaphanus JBecuhts, tip not sensitive to slight contact, highly 

 sensitive to caustic Quercus, tip highly sensitive to contact 

 Power of discrimination Zea, tip highly sensitive, secondary 

 radicles Sensitiveness of radicles to moist air Summary of 

 chapter 129-200 



CHAPTER IV. 



TlIE CiRCUMNCTATING MOVEMENTS OF THE SEVERAL PARTS OF 

 MATURE PLANTS. 



Circumnutation of stems : concluding remarks on Circumnutation 

 of stolons : aid thus afforded in winding amongst the stems of 

 surrounding plants Circumnutation of flower-stems Circum- 

 nutation of Dicotyledonous leaves Singular oscillatory move- 

 ment of leaves of Dionaea Leaves of Cannabis sink at night 

 Leaves of Gymnosperms Of Monocotyledons Cryptogams 

 Concluding remarks on the Circumnutation of leaves : generally 

 rise in the evening and sink in the morning .. .. 201-262 



