Vlll CONTENTS. 



CHAPTER IX. 



The Effects of certain Alkaloid Poisons, other 

 Substances and Vapours. 



Stryclinine, salts of — Quinine, sulphate of, does not soon 

 arrest tlie movement of the protoplasm — Other salts of 

 quinine — Digitaline — Nicotine — Atropine — Vera trine — 

 Colchicine — Theine — Curare — Morphia — Hyoscyamus — 

 Poison of the cobra, apparently accelerates the movements 

 of the protoplasm — Camphor, a powerful stimulant, its 

 vapoui" 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 op the Leaves, and on the Lines 

 OF Transmission of the Motor Impulse. 



Glands 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 of 

 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 — Ee-expansion of the tentacles .. 229-261 



CHAPTER Xr. 



Eeoapitulation of the Chief Observations on 

 , Drosera rotundifolia. 



262-277 



