﻿30 
  

  

  Dr. 
  A. 
  D. 
  Waller. 
  

  

  Galvanometer 
  

  

  Movement 
  

   recorder 
  

  

  50 
  ^(20,000 
  go) 
  

  

  40/(25,OOOw) 
  

  

  111 
  ||H30y(33,333u) 
  

   Time 
  10 
  20 
  30 
  sees. 
  

  

  Lost 
  time 
  (2 
  sees.) 
  of 
  the 
  emotive 
  effect 
  produced 
  in 
  the 
  palm 
  of 
  the 
  hand 
  by 
  a 
  

   voluntary 
  cough. 
  

  

  The 
  moment 
  of 
  the 
  cough 
  is 
  indicated 
  by 
  an 
  air 
  recorder 
  strapped 
  to 
  the 
  forearm, 
  of 
  

   such 
  delicacy 
  that 
  it 
  shows 
  the 
  volume-pulse 
  (80 
  per 
  minute) 
  as 
  well 
  as 
  the 
  mechanical 
  

   movement 
  of 
  the 
  forearm 
  accompanying 
  the 
  cough. 
  The 
  dimensions 
  of 
  the 
  effect 
  are 
  as 
  

   follows 
  : 
  lost 
  time 
  = 
  2 
  sees. 
  ; 
  rise 
  of 
  conductance 
  from 
  46 
  - 
  5 
  to 
  51*25 
  y 
  (= 
  fall 
  of 
  resist- 
  

   ance 
  from 
  21,510 
  to 
  1950 
  or 
  2010 
  ohms, 
  i.e., 
  in 
  laboratory 
  language, 
  a 
  " 
  2000-ohm 
  cough 
  "). 
  

  

  y 
  

   30 
  

  

  25 
  

  

  zo 
  

  

  Threat 
  

  

  Jj 
  

   P4 
  

  

  

  

  

  

  

  1 
  1 
  '1 
  1 
  

  

  3m. 
  

  

  012 
  .. 
  . 
  

  

  A.M. 
  W. 
  — 
  Normal 
  emotive 
  response, 
  4 
  p.m., 
  May 
  19, 
  to 
  a, 
  the 
  threat 
  of 
  a 
  pin-prick 
  ; 
  

  

  b, 
  a 
  real 
  pin-prick. 
  

  

  