CONTENTS 



PAGE. 



CHAPTER I. PLAN OF THE INVESTIGATION 9-32 



Principles of selection of the experimental processes 13 



General methodological considerations 18 



Normal or basal experiments 20 



Control mixtures 22 



Subjects 24 



Statistical expression of the measurements 27 



Dosage 29 



General arrangement of the apparatus 30 



CHAPTER II. EFFECT OF ALCOHOL ON THE SIMPLEST NEURAL ARCS 33-74 



Available human reflexes 34 



Effect of alcohol on the patellar reflex 35 



Technique 36 



Stimulus 37 



Recording device 40 



Experimental procedure 41 



Results 44 



Variability of the patellar reflex 44 



Normal variations in the case of Subject II 46 



Summary of the effect of alcohol on the patellar reflex 54 



Effect of alcohol on the protective lid-reflex 56 



Technique 56 



Stimulus 57 



Eyelash 58 



Photographic recording camera 58 



Experimental procedure 60 



Records 61 



Results 62 



Summary of the effect of alcohol on the protective lid-reflex 71 



CHAPTER III. EFFECT OF ALCOHOL ON COMPLEX NEURAL ARCS 75-108 



Effect of alcohol on the reaction of the eye to perip 1 eral visual stimuli 76 



Methods for recording the eye-reactions 77 



Theory of recording the movements of the eye by photographing the move- 

 ment of reflection from the cornea 78 



Reaction-time of the eye 78 



Apparatus 79 



Recording camera 79 



Head-rest 81 



Recording light 81 



Exposure apparatus and stimulus 81 



Time records 82 



Experimental procedure 82 



Results 83 



Summary of eye-reaction data 89 



Variability of the measurements 89 



Effect of alcohol on the eye-reaction 90 



Effect of alcohol on the reaction-time in reading isolated words . 90 



Exposure apparatus 91 



Voice-reaction key 97 



Experimental procedure 99 



Records 101 



Results 101 



Summary of the word-reactions 106 



Effect of alcohol on word-reaction 108 



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