﻿THE 
  EARTHQUAKE 
  SOUND. 
  191 
  

  

  to 
  me 
  that 
  natural 
  currents 
  of 
  great 
  intensity 
  and 
  alternating 
  polarity 
  were 
  being 
  

   generated 
  by 
  each 
  shock 
  of 
  earthquake, 
  which 
  had 
  the 
  effect 
  of 
  neutralising 
  and 
  

   restoring 
  the 
  battery 
  current. 
  There 
  being 
  a 
  second 
  line 
  available, 
  it 
  was 
  made 
  

   use 
  of 
  as 
  a 
  return 
  wire, 
  when 
  no 
  further 
  trouble 
  was 
  experienced 
  in 
  working. 
  Since 
  

   then 
  earthquake 
  shocks 
  have 
  not 
  had 
  the 
  least 
  influence 
  on 
  our 
  work 
  though 
  

   repeatedly 
  felt 
  up 
  to 
  the 
  time 
  of 
  my 
  writing. 
  

  

  In 
  conclusion 
  1 
  would 
  beg 
  to 
  add 
  that 
  between 
  the 
  12th 
  and 
  16th 
  June, 
  before 
  

   communication 
  was 
  restored, 
  repeated 
  attempts 
  were 
  made 
  by 
  me 
  to 
  get 
  Gauhati 
  

   and 
  Sylhet, 
  and 
  it 
  was 
  noticed 
  that 
  severe 
  electrical 
  shocks 
  were 
  felt, 
  often 
  

   accompanied 
  by 
  flashes, 
  and 
  in 
  every 
  instance 
  simultaneous 
  with 
  the 
  earthquake 
  

   rumble, 
  which 
  immediately 
  preceded 
  each 
  shock." 
  

  

  Leaving 
  out 
  of 
  consideration 
  the 
  explanation 
  proposed, 
  this 
  

  

  account, 
  like 
  the 
  first, 
  shows 
  that 
  there 
  were 
  marked 
  electric 
  currents 
  

  

  accompanying 
  the 
  after 
  shocks 
  in 
  the 
  neighbourhood 
  of 
  Shillong, 
  

  

  which 
  rendered 
  it 
  impossible 
  to 
  utilise 
  the 
  earth 
  as 
  a 
  return 
  for 
  the 
  

  

  current. 
  The 
  intensity 
  of 
  these 
  currents 
  was 
  too 
  great 
  for 
  them 
  

  

  to 
  be 
  explained 
  as 
  a 
  purely 
  mechanical 
  result 
  of 
  the 
  disturbance 
  

  

  of 
  the 
  soil 
  in 
  contact 
  with 
  the 
  earth 
  plates, 
  though 
  this 
  is 
  known 
  to 
  

  

  produce 
  slight 
  electric 
  currents, 
  and 
  the 
  cause 
  must 
  be 
  looked 
  for 
  at 
  

  

  a 
  greater 
  depth 
  and 
  more 
  directly 
  connected 
  with 
  the 
  origin 
  of 
  the 
  

  

  disturbance. 
  

  

  Chapter 
  XIII.— 
  THE 
  EARTHQUAKE 
  SOUNDS, 
  WITH 
  SOME 
  

   REMARKS 
  ON 
  THE 
  BARISAL 
  GUNS. 
  

  

  Like 
  everything 
  else 
  connected 
  with 
  this 
  earthquake, 
  the 
  sound 
  

   phenomena, 
  which 
  are 
  so 
  usual 
  an 
  accompaniment 
  of 
  earthquakes, 
  

   were 
  exhibited 
  on 
  an 
  unusual 
  scale. 
  Yet, 
  probably 
  on 
  account 
  of 
  

   the 
  greater 
  impression 
  left 
  by 
  the 
  more 
  obvious 
  and 
  awe-inspiring 
  

   effects 
  of 
  the 
  earthquake, 
  it 
  has 
  not 
  been 
  possible 
  to 
  collect 
  informa- 
  

   tion 
  which 
  will 
  add 
  much 
  to 
  the 
  solution 
  of 
  the 
  many 
  vexed 
  questions 
  

   connected 
  with 
  the 
  origin 
  of 
  the 
  earthquake 
  sounds. 
  

  

  Almost 
  the 
  only 
  definite 
  fact 
  to 
  be 
  noted 
  in 
  this 
  connection 
  is 
  

   that 
  the 
  earthquake 
  was 
  distinctly 
  heard, 
  though 
  not 
  felt, 
  in 
  the 
  mines 
  

   of 
  the 
  Raniganj 
  coalfield. 
  In 
  this 
  same 
  region 
  the 
  earthquake, 
  as 
  felt 
  

   above 
  ground 
  might 
  almost 
  have 
  been 
  called 
  severe 
  ; 
  it 
  was 
  universally 
  

   felt 
  and 
  caused 
  some 
  damage 
  to 
  buildings. 
  

  

  ( 
  I9i 
  ) 
  

  

  