Vlll CONTENTS. 



CHAPTER IX. 



THE EFFECTS OF CERTAIN ALKALOID POISONS, OTHER 

 SUBSTANCES AND VAPOURS. 



Rlrychuine, salts of Quinine, sulphate of, does not 



arrest the movement of the protoplasm Other salts oi 

 quinine Digitaline Nicotine Atropine Veratrine - 

 Colchicine Theine Curare Morphia Hyoscyamus - 

 Poison of the cobra, apparently accelerates the movements 

 of the protoplasm Camphor, a powerful stimulant, its 

 vapour narcotic Certain essential oils excite movement 

 Glycerine Water and certain solutions retard or prevent 

 the subsequent action of phosphate of ammonia Alcohol 

 innocuous, its vapour narcotic and poisonous Chloroform, 

 sulphuric and nitric ether, their stimulant, poisonous, and 

 narcotic power - - Carbonic acid narcotic, not quickly 

 poisonous Concluding remarks Pages 199-228 



CHAPTER X. 



ON THE SENSITIVENESS OF THE LEAVES, AND ON THE LINKS 

 OF TRANSMISSION OF THE MOTOR IMPULSE. 



'Jr lands and summits of the tentacles alone sensitive Trans- 

 mission of the motor impulse down the pedicels of the 

 tentacles, and across the blade of the leaf Aggregation oi 

 the protoplasm, a reflex action First discharge of the 

 motor impulse sudden Direction of the movements of the 

 tentacles Motor impulse transmitted through the cellular 

 tissue Mechanism of the movements Nature of the 

 motor impulse Re-expansion of the tentacles .. 229-261 



CHAPTER XL 



RECAPITULATION OF THE CHIEF OBSERVATIONS ON 

 DROSERA ROTUNDIFOLIA. 



2G2-277 



