﻿344 
  OLDHAM 
  : 
  GREAT 
  EARTHQUAKE 
  OF 
  1897. 
  

  

  Sunamganj 
  they 
  seem 
  to 
  have 
  been 
  more 
  considerable. 
  In 
  Sunamganj 
  the 
  

   largest 
  fissures 
  were 
  over 
  30 
  feet 
  broad 
  and 
  extended 
  along 
  the 
  river 
  bank 
  in 
  

   some 
  places 
  over 
  half 
  a 
  mile. 
  In 
  Jaintia 
  and 
  Karimganj 
  there 
  are 
  instances 
  of 
  

   fissures 
  extending 
  in 
  a 
  continuous 
  line 
  right 
  across 
  narrow 
  tongues 
  of 
  land, 
  thus 
  

   pearly 
  separating 
  them 
  from 
  the 
  main 
  land 
  and 
  forming 
  a 
  sort 
  of 
  khal. 
  !n 
  

   Jaintia 
  slong 
  the 
  banks 
  of 
  the 
  river 
  Surma 
  the 
  fissures 
  in 
  some 
  places 
  are 
  15 
  feet 
  

   deep 
  and 
  usually 
  over 
  6 
  feet 
  deep. 
  In 
  some 
  cases 
  the 
  bank 
  which 
  was 
  cracked 
  

   at 
  the 
  time 
  of 
  the 
  earthquake 
  did 
  not 
  subside 
  until 
  November. 
  

  

  [b) 
  The 
  outpouring 
  of 
  sand 
  seems 
  to 
  have 
  been 
  common 
  everywhere 
  in 
  the 
  

   vicinity 
  of 
  rivers 
  and 
  bils. 
  The 
  damage 
  due 
  to 
  this 
  cause 
  was 
  not 
  on 
  the 
  whole 
  

   very 
  great, 
  though 
  in 
  the 
  Jaintia 
  Parganahs 
  near 
  Kanair 
  Ghat 
  in 
  several 
  

   instances 
  paddy 
  was 
  damaged 
  by 
  the 
  upheaval 
  of 
  sand. 
  The 
  Subdivisional 
  

   Officer 
  of 
  Habigar.j 
  reports 
  that 
  the 
  sand 
  thus 
  ejected 
  has 
  had 
  a 
  fertilising 
  effect 
  

   contrary 
  to 
  expectation, 
  and 
  that 
  the 
  beds 
  of 
  tanks 
  have 
  interstices 
  in 
  the 
  Dharma 
  

   pasa 
  thana 
  of 
  Sunamganj. 
  In 
  Mouza 
  Bayangpur, 
  Parganah 
  Satbank, 
  Jaintia, 
  a 
  

   khal 
  was 
  foimed 
  about 
  f 
  mile 
  long 
  and 
  was 
  navigable 
  for 
  3 
  malla 
  boats 
  1 
  during 
  

   the 
  rains. 
  Two 
  streams 
  in 
  Mouza 
  Chikuagul, 
  Parganah 
  Panchbhag, 
  have 
  changed 
  

   their 
  course. 
  In 
  Mouza 
  Bug 
  ail 
  Kandi, 
  Parganah 
  Dhargam, 
  the 
  Piyain 
  has 
  left 
  

   its 
  old 
  course 
  and 
  now 
  flows 
  through 
  Bugail 
  bil 
  | 
  of 
  a 
  mile 
  away 
  from 
  its 
  old 
  

   bed. 
  

  

  Appendix 
  C. 
  

  

  Details 
  of 
  observations 
  made 
  for 
  the 
  purpose 
  of 
  determining 
  the 
  

   -velocity 
  of 
  movement 
  and 
  acceleration 
  oj 
  wave-particle 
  with 
  

   a 
  discussion 
  of 
  the 
  formulae 
  employed 
  and 
  the 
  results 
  obtaining. 
  

  

  In 
  this 
  statement 
  the 
  values 
  of 
  /, 
  or 
  acceleration, 
  is 
  given 
  in 
  feet 
  per 
  second 
  

   and 
  deduced 
  by 
  West's 
  formula. 
  

  

  The 
  value 
  v 
  is 
  deduced 
  from 
  Prof. 
  Haughton's 
  formula 
  as 
  given 
  in 
  Mallet's 
  

   account 
  of 
  the 
  Neapolitan 
  Earthquake 
  of 
  1857. 
  

  

  In 
  the 
  case 
  of 
  objects 
  projected 
  the 
  value 
  is 
  obtained 
  by 
  the 
  angle 
  of 
  projection 
  

   being 
  taken 
  at 
  45 
  or 
  o° 
  according 
  to 
  circumstances. 
  Where 
  the 
  vertical 
  difference 
  

   of 
  position 
  much 
  exceeds 
  the 
  horizontal 
  the 
  latter 
  gives 
  the 
  minimum 
  value, 
  

   where 
  on 
  the 
  other 
  hand 
  the 
  vertical 
  difference 
  is 
  nothing 
  or 
  small, 
  the 
  former 
  

   gives 
  the 
  minimum 
  value. 
  

  

  In 
  every 
  case 
  the 
  figures 
  in 
  the 
  last 
  three 
  columns 
  are 
  given 
  in 
  foot-second 
  

   units. 
  These 
  values 
  may 
  be 
  converted 
  into 
  millimetres 
  by 
  multiplication 
  by 
  300. 
  

   The 
  error, 
  which 
  is 
  little 
  more 
  than 
  1%, 
  is 
  immaterial 
  in 
  view 
  of 
  the 
  much 
  greater 
  

   errors 
  inherent 
  in 
  the 
  method 
  of 
  determination. 
  

  

  The 
  second 
  column 
  states 
  whether 
  the 
  value 
  is 
  a 
  maximum 
  or 
  minimum 
  one. 
  

   The 
  sign 
  < 
  representing 
  a 
  maximum 
  value, 
  or 
  that 
  the 
  real 
  value 
  is 
  less 
  than 
  the 
  

   given 
  ; 
  the 
  sign 
  > 
  on 
  the 
  contrary 
  indicating 
  a 
  minimum 
  value, 
  or 
  that 
  the 
  real 
  

   value 
  is 
  greater 
  than 
  that 
  given. 
  

  

  1 
  i.e., 
  Beats 
  requiring 
  three 
  boatmen. 
  

  

  ( 
  344 
  ) 
  

  

  