﻿42 
  

  

  Dr. 
  A. 
  D. 
  Waller. 
  

  

  There 
  was 
  no 
  apparent 
  electrical 
  reponse 
  to 
  three 
  successive 
  stimuli 
  of 
  

   smelling 
  " 
  xylol." 
  However, 
  it 
  is 
  noteworthy 
  that 
  on 
  this 
  occasion 
  the 
  

   resistance 
  of 
  the 
  hand 
  was 
  very 
  high, 
  so 
  that 
  any 
  alteration 
  of 
  resistance, 
  due 
  

   to 
  the 
  stimulus, 
  of 
  less 
  than 
  1000 
  ohms 
  would 
  hardly 
  be 
  noticeable 
  with 
  the 
  

   given 
  sensitivity 
  of 
  the 
  galvanometer. 
  In 
  the 
  record 
  taken 
  of 
  the 
  normal 
  

   hand, 
  the 
  same 
  stimulus 
  did 
  give 
  an 
  alteration 
  of 
  less 
  than 
  1000 
  ohms, 
  but 
  in 
  

   this 
  case 
  it 
  is 
  quite 
  noticeable, 
  because 
  the 
  initial 
  resistance 
  was 
  so 
  much 
  

   lower. 
  

  

  In 
  the 
  following 
  experiments 
  the 
  subject 
  was 
  put 
  into 
  the 
  double 
  circuit, 
  

   which 
  Dr. 
  Waller 
  very 
  kindly 
  worked. 
  

  

  In 
  this 
  apparatus, 
  by 
  adjusting 
  the 
  resistance 
  box 
  and 
  the 
  shunt, 
  so 
  as 
  

   always 
  to 
  bring 
  the 
  spots 
  of 
  light 
  back 
  to 
  zero, 
  the 
  sensitivity 
  of 
  the 
  two 
  

   galvanometers 
  can 
  be 
  made 
  almost 
  identical, 
  whatever 
  difference 
  of 
  resistance 
  

   exists 
  between 
  the 
  two 
  hands. 
  

  

  Experiment 
  3, 
  November 
  30. 
  — 
  At 
  1.25 
  p.m. 
  subject 
  injected 
  in 
  the 
  left 
  

   palm 
  with 
  1/200 
  grain 
  (0'000325 
  grm.) 
  atropine 
  sulphate. 
  Subject 
  put 
  into 
  

   the 
  circuits 
  at 
  3.15 
  P.M. 
  Stimulus 
  by 
  a 
  whiff 
  of 
  nitro-chloroform. 
  No 
  differ- 
  

   ence 
  in 
  reaction 
  to 
  be 
  seen 
  between 
  the 
  atropinised 
  and 
  non-atropinised 
  

   hands. 
  

  

  Fig. 
  6. 
  

  

  