﻿FOURTH 
  REPORT 
  OF 
  THE 
  DIRECTOR 
  1907 
  

  

  37 
  

  

  A 
  description 
  of 
  the 
  instruments 
  in 
  use 
  at 
  the 
  station 
  has 
  been 
  

   given 
  in 
  a 
  previous 
  report. 
  The 
  important 
  constants 
  applicable 
  to 
  

   the 
  interpretation 
  of 
  the 
  records 
  are 
  as 
  follows: 
  Latitude, 
  n. 
  42 
  ° 
  

   39/ 
  6" 
  ; 
  longitude, 
  w. 
  73 
  ° 
  45' 
  18". 
  Weight 
  of 
  each 
  pendulum, 
  in- 
  

   cluding 
  arm, 
  11.283 
  kilograms. 
  Distance 
  of 
  center 
  of 
  gravity 
  from 
  

   rotating 
  axis 
  84.6 
  centimeters. 
  The 
  period 
  of 
  the 
  pendulum 
  (time 
  

   required 
  for 
  a 
  complete 
  swing) 
  averages 
  30 
  seconds, 
  with 
  variations 
  

   of 
  two 
  or 
  three 
  seconds 
  from 
  the 
  mean. 
  The 
  recording 
  arm 
  has 
  a 
  

   multiplying 
  ratio 
  of 
  10. 
  The 
  base 
  of 
  the 
  instruments 
  is 
  approxi- 
  

   mately 
  85 
  feet 
  above 
  sea 
  level. 
  

  

  RECORD 
  OF 
  EARTHQUAKES 
  AT 
  ALBANY 
  STATION 
  OCTOBER 
  I, 
  1906 
  TO 
  

  

  OCTOBER 
  I, 
  I907 
  

  

  Standard 
  Time 
  

  

  Dae 
  

  

  1906 
  

   Oct. 
  1 
  

   Nov. 
  14 
  

   Dec. 
  3 
  

   Dec. 
  22 
  

   Dec. 
  23 
  

  

  1907 
  

  

  Jan. 
  2 
  

   Jan. 
  4 
  

   Jan. 
  14 
  

   Mar. 
  31 
  

  

  £ 
  pr 
  - 
  I5 
  

  

  May 
  28 
  

  

  May 
  31 
  

   June 
  1 
  

   June 
  4 
  

   June 
  28 
  

   July 
  1 
  

   Aug. 
  17 
  

   Sept. 
  2 
  

   Sept. 
  23 
  

  

  Beginning 
  

   preliminaries 
  

  

  h. 
  

  

  9 
  

  

  1 
  

  

  5 
  

  

  1 
  

  

  12 
  

  

  7 
  

   12 
  

  

  3 
  

   5 
  

   1 
  

   10 
  

   8 
  

  

  3 
  

   10 
  

  

  1 
  

  

  8 
  

   11 
  

   11 
  

  

  4 
  

  

  m. 
  

  

  28 
  p. 
  m 
  

   34 
  P- 
  m 
  

   03 
  p. 
  m 
  

   39 
  P-m 
  

   39 
  P-m 
  

  

  53 
  a. 
  m 
  

   43 
  a. 
  m, 
  

   47 
  p. 
  m, 
  

   16 
  p. 
  m. 
  

   14^ 
  a. 
  m. 
  

   00 
  a. 
  m. 
  

  

  a. 
  m. 
  

  

  a. 
  m. 
  

  

  p. 
  m. 
  

  

  p. 
  m. 
  

  

  a. 
  m. 
  

  

  a. 
  m. 
  

  

  a. 
  m. 
  

  

  p. 
  m. 
  

  

  02 
  

   55 
  

   31 
  

   25 
  

   14 
  

   40 
  

   12 
  

   46 
  

  

  Beginning 
  

  

  principal 
  

  

  part 
  

  

  °3 
  

  

  52 
  

  

  7 
  55 
  

   1 
  25 
  

  

  1 
  i9t 
  

  

  8 
  23 
  

   11 
  3<H 
  

  

  Maximum 
  

  

  End 
  

  

  2 
  15 
  

  

  12 
  52 
  

  

  7 
  56 
  

  

  1 
  26 
  

  

  1 
  33 
  

  

  *8 
  12 
  

  

  *8 
  28J 
  

  

  ii 
  38 
  

  

  h. 
  

   10 
  

  

  I 
  

  

  5 
  

   3 
  

  

  1 
  

  

  30 
  

  

  41 
  

   30 
  

   o 
  

  

  34 
  

  

  a 
  24 
  

  

  2 
  17 
  

  

  4 
  12 
  

  

  5 
  47 
  

  

  3 
  o 
  

  

  9 
  

  

  4 
  

  

  11 
  

  

  2 
  

  

  9 
  

  

  12 
  

  

  3 
  

  

  5 
  

  

  00 
  

   38 
  

   53 
  

   12 
  

  

  15 
  

  

  15 
  p.m. 
  

  

  00 
  p. 
  m. 
  

  

  37 
  

  

  Max. 
  

   ampli- 
  

   tude 
  

  

  mm 
  

  

  I 
  

  

  7 
  

  

  10 
  

   5 
  

  

  8 
  

   6 
  

   i-5 
  

  

  50 
  

   50 
  

  

  a 
  Amplitude 
  over 
  150mm 
  maximum 
  exceeding 
  the 
  limit 
  of 
  registry. 
  

  

  October 
  i. 
  A 
  slight 
  movement 
  lasting 
  a 
  little 
  over 
  an 
  hour 
  

   and 
  registered 
  only 
  on 
  the 
  north-south 
  pendulum, 
  showing 
  the 
  direc- 
  

   tion 
  to 
  be 
  nearly 
  at 
  right 
  angles. 
  The 
  same 
  disturbance 
  was 
  noticed 
  

   at 
  the 
  stations 
  at 
  Washington, 
  Isle 
  of 
  Wight 
  and 
  Perth, 
  Australia. 
  

   Its 
  origin 
  was 
  not 
  definitely 
  fixed, 
  so 
  far 
  as 
  has 
  been 
  learned, 
  but 
  it 
  

   was 
  probably 
  in 
  the 
  southern 
  Pacific 
  or 
  Indian 
  ocean. 
  

  

  November 
  14. 
  A 
  small 
  disturbance, 
  probably 
  centered 
  within 
  

   2000 
  miles 
  of 
  Albany. 
  Slight 
  shocks 
  were 
  reported 
  in 
  New 
  Mexico 
  

   and 
  Kingston, 
  Jamaica. 
  

  

  