﻿34^ 
  

  

  OLDHAM: 
  GREAT 
  EARTHQUAKE 
  OF 
  1897. 
  

  

  

  

  ~5 
  

  

  > 
  

  

  Overthrow 
  

  

  Projec- 
  

  

  

  

  M 
  

  

  and 
  fiacture. 
  

  

  tion. 
  

  

  Nature 
  of 
  object 
  and 
  refer 
  

  

  ENCE. 
  

  

  Relation 
  

   real 
  to 
  

   value, 
  

  

  

  

  

  

  / 
  

  

  V 
  

  

  V 
  

  

  Cherrapunji 
  — 
  

  

  

  

  

  

  

  Inglis' 
  house 
  gate 
  pillars 
  

  

  P-273 
  . 
  

  

  < 
  

  

  8'3 
  

  

  3*5 
  

  

  ' 
  .€. 
  

  

  „ 
  pillar 
  on 
  wall 
  

  

  P- 
  273 
  - 
  

  

  < 
  

  

  13*9 
  

  

  48 
  

  

  ... 
  

  

  Hudson's 
  house 
  gate 
  pillars 
  . 
  

  

  p. 
  318 
  . 
  

  

  < 
  

  

  107 
  

  

  4*8 
  

  

  ... 
  

  

  Cylindrical 
  pillar 
  . 
  . 
  • 
  

  

  P-273 
  • 
  

  

  < 
  

  

  9-1 
  

  

  3-6 
  

  

  ... 
  

  

  Do. 
  . 
  

  

  P. 
  273 
  • 
  

  

  < 
  

  

  9-1 
  

  

  3' 
  6 
  

  

  ... 
  

  

  Rembrai 
  — 
  

  

  

  

  

  

  

  Stone 
  projected 
  s 
  = 
  45° 
  . 
  

  

  p. 
  131 
  . 
  

  

  > 
  

  

  ... 
  

  

  ... 
  

  

  iS'5 
  

  

  Sylhet 
  — 
  

  

  

  

  

  

  

  Tomb 
  of 
  Ensign 
  Spooner 
  

  

  p. 
  274 
  . 
  

  

  > 
  

  

  32 
  

  

  ii*4 
  

  

  ... 
  

  

  Gate 
  pillar 
  near 
  hospital 
  

  

  p. 
  275 
  • 
  

  

  > 
  

  

  1173 
  

  

  4'o 
  

  

  •H 
  

  

  Church 
  northern 
  gate 
  pillar 
  . 
  

  

  p. 
  276 
  . 
  

  

  > 
  

  

  24 
  

  

  81 
  

  

  ... 
  

  

  „ 
  southern 
  do. 
  

  

  p. 
  276 
  . 
  

  

  > 
  

  

  19*2 
  

  

  79 
  

  

  ... 
  

  

  SlLCHAR— 
  

  

  

  

  

  

  

  Cylinder 
  seismometer 
  

  

  p. 
  358 
  . 
  

  

  > 
  

  

  4 
  

  

  27 
  

  

  • 
  . 
  . 
  

  

  Bullet 
  projected 
  

  

  P. 
  358 
  , 
  

  

  > 
  

  

  

  

  i'4 
  

  

  Gate 
  pillar 
  overturned 
  . 
  , 
  . 
  

  

  p. 
  318 
  . 
  

  

  < 
  

  

  65 
  

  

  ... 
  

  

  

  Remarks 
  on 
  the 
  formulae 
  used 
  and 
  results 
  obtained* 
  

   Taking 
  the 
  attempts 
  to 
  deduce 
  the 
  velocity 
  or 
  acceleration 
  of 
  wave-particle 
  

   from 
  objects 
  overthrown 
  by 
  the 
  earthquake 
  in 
  order 
  o^ 
  date, 
  we 
  have 
  first 
  the 
  

   formula 
  of 
  Prof. 
  Haughton, 
  published 
  in 
  Mallet's 
  account 
  of 
  the 
  Neapolitan 
  

   earthquake 
  of 
  1857. 
  l 
  

  

  The 
  investigation 
  proceeds 
  as 
  follows 
  and 
  may 
  be 
  given 
  in 
  Mr. 
  Mallet's 
  own 
  

   words 
  : 
  — 
  

  

  " 
  In 
  order 
  to 
  upset 
  the 
  body, 
  the 
  

   horizontal 
  velocity 
  impressed 
  by 
  the 
  shock 
  

   (whatever 
  be 
  the 
  duration 
  of 
  the 
  latter) 
  

   must 
  be 
  sufficient 
  to 
  make 
  it 
  turn 
  upon 
  

   one 
  of 
  the 
  arrises 
  or 
  angles 
  of 
  its 
  base 
  

   through 
  an 
  angle 
  formed 
  by 
  the 
  line, 
  

   Fig. 
  42, 
  joining 
  the 
  centre 
  of 
  gravity 
  

   with 
  that 
  angle 
  or 
  arris, 
  and 
  the 
  vertical 
  

   Fig. 
  42. 
  through 
  it. 
  

  

  * 
  R 
  Mallet, 
  Great 
  Neapolitan 
  earthquake 
  of 
  1857. 
  The 
  First 
  Principles 
  of 
  Observational 
  

   Seismology 
  as 
  developed 
  in 
  the 
  report 
  to 
  the 
  Royal 
  Society 
  of 
  London 
  of 
  the 
  expedition 
  made 
  by 
  

   Command 
  of- 
  the 
  Society 
  into 
  the 
  interior 
  of 
  the 
  Kingdom 
  of 
  Naples, 
  to 
  investigate 
  the 
  circum- 
  

   stances 
  of 
  the 
  Great 
  Earthquake 
  of 
  December 
  1857. 
  2 
  vols., 
  London, 
  1862. 
  Vol. 
  I 
  , 
  p. 
  125. 
  

  

  ( 
  346 
  ) 
  

  

  