SYNOPSIS xvii 



PAGE 



The Effect of Electrical Stimulation upon Growth : Currents artificially 

 sent through a root said to retard growth Statement not 

 warranted by fact^Experiments with potatoes, with plants in 

 greenhouse, and with onions Question of polarity, not 

 electricity Variously stimulated onions illustrated - - 39 



CHAPTER III 

 THE EMPLOYMENT OF ELECTRICITY IN AGRICULTURE 



Review of the last one hundred and fifty years Results considered 

 Chlorosis in plants Iron and oxygen in plant life Periods of 

 drought The savoy cabbage - -42 



Note for Guidance in Testing : The electrodes and how to connect 



them (illustrated) - - - - - - 44 



SYNOPSIS OF PART II 



STUDIES IN ELECTRO-PHYSIOLOGY : ANIMAL 

 AND VEGETABLE 



CHAPTER IV 

 REVIEW OF ELECTRO-PHYSIOLOGICAL RESEARCH 



Present state of knowledge Galvani, Volta, Humboldt, Aldini, 

 Nobili, Matteucci, Du Bois-Reymond, Radcliffe, Trowbridge 

 Causes of confusion Certain factors not discovered - - 49 



Causes which have Contributed to Error : Generation and dissipation 

 of nerve force Insulation of the body Air and earth 

 Individuals differ electrically Conflicting results and the 

 reason therefor Personal capacity Capacity of liquids and 

 moist substances Non-polarisable electrodes Other electrodes 

 and their reliability Dr. Longridge's experiments Dr. Martin's 

 experiments Other tests of electrodes Argument " Sugges- 

 tion " The hand-to-hand deflection and thumb-pressure 

 Structure of the body primarily electrical - - 54 



CHAPTER V 

 THE NATURE OF THE NERVE IMPULSE 



Rival theories, physiological and physical Argument that impulse 

 is chemical more in favour of it being electrical Argument 

 Professor Rosenthal and peripheric nerves Inhibition Velocity 



