CONTENTS xxvii 



sensory nerves similar Responsive molecular changes and the correlated 

 tones of sensation Two kinds of nervous impulse, and their character- 

 istics Different manifestations of the same nervous impulse determined 

 by nature of indicator Electrical, motile, and sensory responses, and 

 their mutual relations The brain as a perceiving apparatus Weber- 

 Fechner's Law Elimination of psychic assumption from explanation of 

 particular relation between stimulus and resultant sensation Explana- 

 tion of the factor of quality in sensation Explanation of conversion from 

 positive to negative tone of sensation after tetanisation Various effects 

 of progressive molecular change in nerve Effects of attention and inhibi- 

 tion Polar variations of tonus, inducing acceleration and retardation . 644 



CHAPTER XLIV 



DISSOCIATION OF COMPLEX SENSATION 



Conversion of pleasurable into painful sensation, and vice versa, by electro- 

 tonus The Sensirneter Mechanical stimulation Stimulation by ther- 

 mal shocks Chemical stimulation Opposite effects of anode and 

 kathode Normal effects reversed under feeble E.M.F. Negative tone 

 of sensation blocked by alcohol and anaesthetics Separation of positive 

 and negative sensations, by lag of one wave behind the other Dissocia- 

 tion of sensation by depression of conductivity Abolition of the negative 

 or painful element by block of conduction ...... 666 



CHAPTER XLV 



MEMORY 677 



CHAPTER XLVI 



REVIEW OF RESPONSE OF ISOTROPIC ORGANS 687 



CHAPTER XLVII 



REVIEW OF RESPONSE OF ANISOTROPIC ORGANS 7 



CHAPTER XLVIII 



REVIEW OF RESPONSE OF NERVE AND RELATED PSYCHOLOGICAL 

 PHENOMENA 7*8 



CLASSIFIED LIST OF EXPERIMENTS . . . . 735 



INDEX . 747 



