﻿234 
  OLDHAM: 
  GREAT 
  EARTHQUAKE 
  OF 
  1897. 
  

  

  maximum 
  on 
  the 
  N-S 
  pendulum 
  at 
  nh. 
  47m 
  8s. 
  The 
  maximum 
  on 
  the 
  

   E-W 
  component 
  is 
  somewhat 
  later, 
  but 
  the 
  maximum 
  of 
  the 
  resultant 
  

   of 
  the 
  two 
  coincides 
  very 
  closely 
  with 
  that 
  on 
  the 
  N-S 
  component. 
  

   The 
  trace 
  continues 
  disturbed 
  till 
  14I1. 
  

  

  Rome.— 
  Ufficio 
  centrale 
  di 
  Meteorologia 
  e 
  di 
  Geodinamica.— 
  

   A 
  very 
  detailed 
  account 
  of 
  the 
  records 
  obtained 
  at 
  this 
  observatory 
  

   is 
  published 
  in 
  the 
  Boll. 
  Soc. 
  Sismol. 
  Ital., 
  Ill, 
  pt. 
  ii, 
  pp. 
  253-267, 
  

   from 
  which 
  the 
  following 
  has 
  been 
  abstracted 
  : 
  — 
  

  

  Sismometografo 
  medio 
  (8m., 
  100 
  kg., 
  amplification 
  10 
  times) 
  — 
  

   Commencement 
  abrupt 
  at 
  nh. 
  17m. 
  5S. 
  + 
  5S., 
  maximum 
  displacement 
  

   2-5 
  mm. 
  NW-SE, 
  3*0 
  mm. 
  NE-SVV; 
  resultant 
  nearly 
  E-W. 
  After 
  

   coming 
  to 
  rest 
  the 
  disturbance 
  due 
  to 
  the 
  second 
  phase 
  commenced 
  

   between 
  i|h. 
  24m. 
  and 
  I 
  ih. 
  24m. 
  20s., 
  the 
  maximum 
  displacement 
  

   being 
  3 
  mm. 
  shortly 
  after 
  the 
  latter 
  time. 
  The 
  great 
  undulations 
  

   began 
  at 
  nh. 
  43m. 
  30s. 
  and 
  reached 
  their 
  maximum 
  of 
  10mm. 
  at 
  nh. 
  

   47m. 
  30s. 
  The 
  disturbance 
  ended 
  at 
  I2h. 
  5m. 
  

  

  Sismometografo 
  grande 
  (16m., 
  200kg 
  , 
  amplification 
  12 
  times). 
  — 
  

   Commencement 
  at 
  nh. 
  17m. 
  2o.+ 
  5s., 
  maximum 
  of 
  first 
  phase 
  5mm. 
  

   at 
  nh. 
  20m. 
  2os., 
  decreasing 
  to 
  almost 
  extinction. 
  The 
  second 
  

   phase 
  commenced 
  at 
  lib. 
  25m. 
  20s. 
  reaching 
  a 
  maximum 
  at 
  I2h. 
  

   28m. 
  15s. 
  on 
  the 
  NE-SW 
  component, 
  and 
  at 
  nh. 
  27m. 
  30s. 
  on 
  

   the 
  NW-SE. 
  The 
  great 
  undulations 
  commenced 
  at 
  nh. 
  43m. 
  8s. 
  

   and 
  reached 
  their 
  maximum 
  at 
  nh. 
  46m. 
  58s. 
  or 
  shortly 
  after. 
  

  

  Padua. 
  — 
  In 
  the 
  University 
  of 
  Padua 
  two 
  microseismographs 
  have 
  

   been 
  set 
  up 
  by 
  Prof. 
  Vicentini 
  ; 
  one 
  a 
  simple 
  pendulum 
  of 
  1*5 
  metres 
  

   length 
  with 
  a 
  bob 
  weighing 
  100 
  kgm. 
  ; 
  the 
  other 
  a 
  simple 
  pendulum 
  

   of 
  10 
  metres 
  length 
  and 
  400 
  kgm. 
  weight. 
  1 
  A 
  reproduction 
  and 
  dis- 
  

   cussion 
  of 
  the 
  diagram 
  obtained 
  from 
  the 
  first 
  of 
  these 
  is 
  given 
  in 
  a 
  

   paper 
  by 
  Dr. 
  M. 
  Baratta. 
  2 
  As 
  at 
  Ischia, 
  the 
  first 
  movements 
  were 
  

   of 
  a 
  rapid 
  to 
  and 
  fro 
  nature 
  ; 
  they 
  commence 
  somewhat 
  abruptly 
  at 
  

  

  1 
  For 
  a 
  detailed 
  description 
  and 
  illustrations 
  of 
  these 
  instruments, 
  see 
  a 
  paper 
  by 
  

   Dr. 
  Giulio 
  Pacher, 
  Atti 
  del 
  R. 
  Instituto 
  Veneto 
  de 
  scienze 
  lettere 
  ed 
  arte, 
  7th 
  series, 
  

   VIII, 
  1896-97, 
  and 
  also 
  in 
  Boll. 
  Soc. 
  Sismol. 
  Ital., 
  Ill, 
  pt. 
  i, 
  65-131 
  (1197). 
  

  

  2 
  Boll. 
  Soc. 
  Geog. 
  Ital., 
  1897, 
  fasc. 
  viii. 
  

  

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  234 
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