﻿Concerning 
  Emotive 
  Phenomena. 
  

  

  41 
  

  

  of 
  sweat 
  glands 
  and 
  the 
  field 
  of 
  the 
  p.-g. 
  reflex 
  corresponded 
  with 
  one 
  

   another 
  in 
  a 
  very 
  close 
  manner. 
  To 
  add 
  a 
  conclusive 
  proof 
  he 
  again 
  carried 
  

   out 
  atropine 
  experiments. 
  The 
  following 
  is 
  an 
  extract 
  from 
  his 
  paper 
  : 
  — 
  

  

  " 
  Ten 
  subjects, 
  who 
  showed 
  the 
  p.-g. 
  reflex 
  in 
  a 
  normal 
  manner 
  were 
  

   injected 
  subcutaneously 
  on 
  any 
  spot 
  chosen 
  with 
  1 
  mgrm. 
  of 
  atropine 
  sulphate. 
  

   The 
  subsequent 
  observations 
  were 
  as 
  follows 
  : 
  — 
  Directly 
  after 
  the 
  injection, 
  

   and 
  for 
  the 
  next 
  10 
  to 
  15 
  minutes, 
  the 
  galvanometer 
  movement 
  was 
  of 
  normal 
  

   size. 
  After 
  15 
  to 
  25 
  minutes 
  it 
  became 
  noticeably 
  smaller, 
  and 
  after 
  about 
  

   30 
  minutes, 
  even 
  after 
  the 
  strongest 
  stimulus, 
  no 
  galvanometer 
  reaction 
  could 
  

   be 
  noticed." 
  

  

  As 
  neither 
  Veraguth 
  nor 
  Leva 
  publish 
  photographs 
  nor 
  give 
  any 
  very 
  

   detailed 
  accounts 
  of 
  these 
  experiments, 
  it 
  was 
  thought 
  worth 
  while 
  to 
  carry 
  

   them 
  out 
  yet 
  once 
  again. 
  

  

  Apparatus 
  Used. 
  

  

  In 
  the 
  first 
  two 
  experiments 
  a 
  single 
  circuit 
  was 
  used, 
  and 
  only 
  the 
  

   atropinised 
  hand 
  was 
  connected 
  to 
  the 
  instrument 
  — 
  the 
  circuit 
  consisted 
  of 
  

   two 
  Leclanche 
  cells, 
  a 
  resistance 
  box, 
  the 
  subject, 
  shunt, 
  and 
  galvanometer 
  ; 
  

   the 
  resistance 
  box 
  and 
  subject 
  being 
  put 
  into 
  the 
  circuit 
  separately 
  or 
  simul- 
  

   taneously 
  by 
  means 
  of 
  keys. 
  

  

  It 
  was 
  thought, 
  however, 
  that 
  no 
  conclusive 
  results 
  could 
  be 
  arrived 
  at 
  

   unless 
  simultaneous 
  records 
  were 
  taken 
  of 
  an 
  atropinised 
  and 
  a 
  normal 
  hand, 
  

   therefore 
  the 
  remaining 
  experiments 
  were 
  carried 
  out 
  on 
  Dr. 
  Waller's 
  

   apparatus, 
  which 
  consisted 
  of 
  two 
  circuits, 
  each 
  of 
  which 
  was 
  a 
  Wheatstone 
  

   bridge 
  — 
  in 
  one 
  arm 
  of 
  which 
  is 
  placed 
  the 
  subject, 
  and 
  in 
  the 
  other 
  a 
  

   resistance 
  box, 
  so 
  that 
  the 
  resistance 
  of 
  the 
  subject 
  can 
  be 
  read 
  directly 
  

   without 
  any 
  subsequent 
  calculation. 
  

  

  The 
  electrodes 
  used 
  were 
  zinc 
  discs 
  covered 
  with 
  blotting 
  paper 
  soaked 
  in 
  

   ZnS04. 
  The 
  galvanometer 
  excursions 
  were 
  photographed. 
  

  

  Experiment 
  1. 
  — 
  On 
  November 
  3, 
  two 
  pieces 
  of 
  1 
  per 
  cent, 
  belladonna 
  

   plaster 
  were 
  put 
  on 
  the 
  palm 
  of 
  the 
  left 
  hand 
  and 
  forearm 
  respectively. 
  On 
  

   November 
  8 
  the 
  plaster 
  was 
  taken 
  off, 
  and 
  the 
  subject 
  put 
  into 
  the 
  circuit 
  

   with 
  the 
  electrodes 
  placed 
  where 
  the 
  plaster 
  had 
  been. 
  The 
  stimulus 
  given 
  

   was 
  a 
  single 
  sharp 
  blow. 
  

  

  The 
  electrodes 
  were 
  then 
  placed 
  on 
  the 
  normal 
  right 
  palm 
  and 
  forearm, 
  

   and 
  the 
  same 
  stimulus 
  applied. 
  The 
  results 
  obtained 
  from 
  the 
  two 
  hands 
  did 
  

   not 
  differ 
  appreciably 
  from 
  one 
  another. 
  

  

  Experiment 
  2, 
  November 
  16. 
  — 
  At 
  2.25 
  p.m. 
  the 
  subject 
  was 
  injected 
  in 
  the 
  

   left 
  palm 
  with 
  1/200 
  grain 
  atropine 
  sulphate 
  (0-000325 
  grm.). 
  At 
  3.5 
  p.m. 
  

   the 
  subject 
  was 
  put 
  into 
  the 
  circuit, 
  and 
  a 
  record 
  was 
  taken. 
  

  

  