﻿310 
  Prof. 
  L. 
  T. 
  More 
  on 
  the 
  Localization 
  

  

  a 
  short 
  brass 
  T-piece 
  soldered 
  to 
  its 
  middle 
  point. 
  This 
  

   tube 
  slides 
  freely 
  in 
  two 
  other 
  brass 
  tubes, 
  AC 
  and 
  BF, 
  

   each 
  140 
  cm. 
  long. 
  The 
  ends 
  of 
  these 
  are 
  extended 
  by 
  

  

  glass 
  tubes, 
  C 
  to 
  G 
  and 
  F 
  to 
  K, 
  of 
  the 
  same 
  diameter, 
  and 
  

   joined 
  together 
  by 
  rubber 
  tubing. 
  In 
  the 
  early 
  part 
  of 
  the 
  

   work, 
  two 
  ear-caps 
  were 
  attached 
  at 
  G 
  and 
  K. 
  The 
  ear-caps 
  

   were 
  made 
  of 
  wooden 
  disks, 
  9 
  centimetres 
  in 
  diameter, 
  

   stuffed 
  with 
  soft 
  annular 
  pads 
  of 
  cotton-wool 
  covered 
  with 
  

   silk. 
  But 
  in 
  all 
  the 
  observations 
  recorded 
  two 
  long 
  rubber 
  

   tubes, 
  each 
  800 
  cm. 
  in 
  length 
  and 
  of 
  a 
  diameter 
  equal 
  to 
  

   that 
  of 
  the 
  other 
  tubes, 
  were 
  attached 
  at 
  G 
  and 
  K 
  and 
  the 
  

   ear-caps 
  added 
  to 
  their 
  free 
  ends. 
  The 
  tubes 
  A 
  to 
  G 
  and 
  

   B 
  to 
  K 
  were 
  clamped 
  to 
  the 
  top 
  of 
  a 
  table, 
  and 
  the 
  long- 
  

   tubes 
  GR 
  and 
  KL 
  were 
  laid 
  side 
  by 
  side 
  on 
  the 
  floor 
  to 
  an 
  

   adjacent 
  room, 
  where 
  the 
  listener 
  sat 
  with 
  the 
  ear-caps 
  

   attached 
  to 
  his 
  head, 
  H, 
  as 
  shown. 
  Much 
  care 
  was 
  given 
  to 
  

   making 
  the 
  whole 
  system 
  symmetrical 
  and 
  the 
  two 
  branches 
  

   of 
  exactly 
  the 
  same 
  length. 
  An 
  examination 
  of 
  the 
  results 
  

   shows 
  that 
  this 
  was 
  obtained. 
  The 
  position 
  of 
  the 
  T-piece 
  

   of 
  the 
  slider 
  was 
  read 
  from 
  a 
  scale, 
  graduated 
  in 
  centimetres^ 
  

   fastened 
  near 
  it, 
  the 
  middle 
  or 
  symmetrical 
  point 
  fixed 
  

   at 
  100. 
  

  

  The 
  tuning-forks 
  used 
  in 
  the 
  experiments 
  were 
  clamped 
  

   vertically 
  in 
  a 
  box 
  covered 
  with 
  wadded 
  cloth 
  to 
  deaden 
  the 
  

  

  