^iMi^L 



CONTENTS. 

 LECTURE I. 



I'AtiES 



Currents of animal electricity are produced by animal 

 voltaic couples, in which injured or active proto- 

 plasm is electro-positive (" zincative "), resting 

 protoplasm electro-negative (" zincable "). 



The utilisation of a nerve as a test-object representative 

 of living matter. 



Experiments. — Current of a voltaic couple. Current of 

 injury of muscle — its negative variation. Current 

 of injury of nerve — its negative variation. Paral- 

 lelism between mechanical and electrical effects. 

 Electrical effects of non-electrical stimuli. Action 

 of ether and of chloroform upon isolated nerve ... 1-29 



LECTURE n. 



Description of method. Illustration of Ohm's law. 

 Dead-beat and oscillating magnet. Alcohol, soda 

 water, tobacco smoke. Carbonic acid. The func- 

 tion of respiration. Integration and disintegration. 

 Action of carbonic acid in further detail ... ... 30-54 



LECTURE III. 



On the production of COg by tetanised nerve. 



Hypothesis and experiment. Three stages. Compari- 

 son between the effects of CO., and of tetanisation. 



Direction of further inquiry. Significance of the stair- 

 case effect. Summation. " Bahnung." 



Postscript ... ... ... ... ... ... ._ 55-75 



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