﻿2 
  5 
  6 
  

  

  OLDHAM 
  : 
  GREAT 
  EARTHQUAKE 
  OF 
  1897. 
  

  

  

  

  

  Rate 
  of 
  travel. 
  

  

  

  Interval. 
  

  

  h. 
  m. 
  

  

  Distance 
  

   miles. 
  

  

  Miles 
  

  

  per 
  

  

  minute. 
  

  

  Kilomitres 
  

  

  per 
  

  

  second. 
  

  

  Edinburgh 
  . 
  

  

  Shide 
  .... 
  

  

  Leghorn 
  . 
  . 
  

  

  Rocca 
  di 
  Papa 
  . 
  • 
  , 
  

  

  Ditto 
  . 
  

   Catania 
  « 
  

  

  

  

  3 
  1 
  

  

  3 
  

   3 
  5 
  

  

  2 
  59 
  

  

  3 
  2 
  

   3 
  8 
  

  

  19,968 
  

   20,233 
  

   20,408 
  

   20,434 
  

   20,434 
  

   20,448 
  

  

  no 
  

   112 
  

   no 
  

   114 
  

   "3 
  

   109 
  

  

  2 
  -93 
  

   2*96 
  

   2-93- 
  

   3*02 
  

  

  2*98 
  

   2'88 
  

  

  Arithmetical 
  mean 
  . 
  , 
  

  

  3 
  2 
  

  

  20,321 
  

  

  in 
  

  

  2*95 
  

  

  From 
  this 
  table 
  we 
  see 
  that 
  the 
  time 
  of 
  arrival 
  and 
  the 
  rate 
  of 
  

   travel 
  of 
  these 
  undulations 
  is 
  so 
  close 
  to 
  what 
  should 
  be 
  expected 
  

   if 
  they 
  were 
  surface 
  undulations 
  travelling 
  round 
  the 
  world, 
  that 
  we 
  

   may 
  consider 
  their 
  character 
  as 
  such 
  to 
  be 
  established, 
  as 
  well 
  as 
  is 
  

   possible 
  in 
  the 
  absence 
  of 
  observations 
  from 
  intermediate 
  stations. 
  

  

  The 
  recognition 
  of 
  surface 
  undulations 
  which 
  have 
  travelled 
  

   round 
  the 
  world, 
  may 
  be 
  regarded 
  as 
  one 
  of 
  the 
  most 
  interest- 
  

   ing 
  results 
  of 
  this 
  investigation. 
  It 
  is 
  the 
  first 
  occasion, 
  since 
  

   suitable 
  instruments 
  have 
  been 
  set 
  up, 
  on 
  which 
  the 
  surface 
  

   waves 
  of 
  an 
  earthquake 
  have 
  been 
  of 
  sufficient 
  size 
  to 
  maintain, 
  

   their 
  character, 
  and 
  leave 
  a 
  recognisable 
  record, 
  after 
  traversing 
  five* 
  

   sixths 
  of 
  the 
  circumference 
  of 
  the 
  globe, 
  and 
  the 
  announcement 
  

   of 
  this 
  may 
  well 
  bring 
  the 
  report 
  of 
  the 
  great 
  earthquake 
  o£ 
  

   1897 
  to 
  its 
  close. 
  

  

  (256) 
  

  

  