﻿560 
  

  

  Mr. 
  E. 
  J. 
  Stone 
  on 
  Magnetical 
  [June 
  17, 
  

  

  Deflections. 
  

   April 
  20, 
  3 
  h 
  . 
  Temperature 
  82°. 
  

  

  10 
  52 
  20 
  ■ 
  

  

  ^ 
  10 
  52 
  46 
  f 
  w 
  = 
  10 
  ° 
  53 
  ' 
  6 
  "* 
  

   1 
  10 
  56 
  29 
  J 
  

  

  Vibrations. 
  

  

  April 
  20, 
  4 
  h 
  21 
  m 
  p.m. 
  Temperature 
  67°. 
  90p 
  = 
  2' 
  50". 
  r 
  x 
  = 
  5 
  s 
  -0593, 
  

   r 
  2 
  = 
  5 
  s 
  -0623, 
  7-=5 
  s 
  -0611 
  ; 
  from 
  which 
  X=4-4252, 
  m= 
  0-4262. 
  

  

  Variation. 
  

  

  April 
  20, 
  5 
  h 
  . 
  Temperature 
  67°. 
  90p=2' 
  50". 
  

  

  r 
  229 
  3 
  40 
  

  

  Beadings 
  for 
  the 
  variation-magnet 
  suspension. 
  . 
  j 
  ^27 
  40 
  30 
  

  

  Beading 
  for 
  magnetic 
  meridian 
  228 
  22 
  5 
  

  

  Beading 
  for 
  magnetic 
  meridian, 
  vibration-magnet 
  . 
  228 
  23 
  12 
  

  

  Beading 
  for 
  chimney 
  (2) 
  271 
  40 
  1 
  

  

  Excess 
  of 
  reading 
  for 
  chimney 
  (2) 
  43 
  17 
  56 
  

  

  An 
  attempt 
  was 
  made 
  to 
  obtain 
  another 
  determination 
  of 
  the 
  variation 
  

   on 
  April 
  22, 
  but 
  the 
  thread 
  broke 
  during 
  the 
  observations. 
  

  

  April 
  23, 
  10\ 
  Temperature 
  82°. 
  

  

  Beadings 
  for 
  magnetic 
  meridian 
  suspension 
  . 
  . 
  . 
  . 
  | 
  ^jj^ 
  ^ 
  ^ 
  

  

  Beading 
  for 
  magnetic 
  meridian 
  195 
  32 
  42 
  

  

  „ 
  Kokerboom 
  . 
  220 
  16 
  8 
  

  

  chimney 
  (1) 
  237 
  19 
  36 
  

  

  chimney 
  (2) 
  238 
  46 
  49 
  

  

  Excess 
  of 
  reading 
  for 
  Kokerboom 
  .... 
  24° 
  43' 
  26" 
  

   „ 
  „ 
  chimney 
  (1) 
  . 
  . 
  . 
  . 
  41 
  46 
  54 
  

  

  „ 
  „ 
  chimney 
  (2) 
  .... 
  43 
  14 
  7 
  

  

  The 
  latitude 
  was 
  determined 
  April 
  20, 
  near 
  noon. 
  

  

  Absolute 
  azimuths 
  of 
  marks 
  : 
  — 
  . 
  

  

  April 
  20. 
  Azimuth 
  of 
  Kokerboom 
  183 
  37 
  6 
  

  

  April 
  22. 
  „ 
  „ 
  183 
  35 
  36 
  

  

  Azimuth 
  of 
  Kokerboom 
  183 
  36 
  21 
  

  

  April 
  20. 
  Chimney 
  (2) 
  165 
  5 
  46 
  

  

  April 
  22. 
  Chimney 
  (1) 
  166 
  31 
  20 
  

  

  The 
  two 
  determinations 
  of 
  the 
  azimuth 
  of 
  Kokerboom 
  do 
  not 
  agree 
  

   so 
  closely 
  as 
  could 
  be 
  wished. 
  I 
  cannot 
  find 
  any 
  thing 
  wrong 
  in 
  the 
  

  

  