﻿558 
  

  

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

  

  Klipfoxteix 
  Station. 
  

  

  Approximate 
  longitude 
  l 
  h 
  10 
  ni 
  45 
  s 
  

  

  Approximate 
  south 
  latitude 
  29° 
  14' 
  15" 
  

  

  This 
  station 
  was 
  on 
  a 
  mountain-range 
  about 
  3000 
  feet 
  above 
  the 
  level 
  

   of 
  the 
  sea. 
  It 
  was 
  near 
  Mr. 
  Hall's 
  cottage, 
  but 
  sufficiently 
  removed 
  

   from 
  it 
  to 
  avoid 
  all 
  danger 
  of 
  disturbances 
  from 
  the 
  iron 
  in 
  or 
  about 
  the 
  

   buildings. 
  

  

  Dip 
  Observations. 
  Needle 
  A 
  2 
  B, 
  Dover. 
  

  

  o 
  

  

  1874, 
  April 
  14, 
  10\ 
  A 
  2 
  South 
  53 
  15 
  35 
  

  

  A 
  jNTorth 
  .. 
  53 
  28 
  17 
  

  

  Dip 
  = 
  53 
  21 
  56 
  

  

  Variation 
  Experiments. 
  

  

  April 
  15, 
  9 
  h 
  30 
  m 
  . 
  Temperature 
  77 
  0, 
  2. 
  Torsion 
  correction 
  insensible. 
  

   Yariation-magnet 
  : 
  — 
  

  

  O 
  / 
  // 
  

  

  Azimuthal 
  reading, 
  suspension 
  direct 
  90 
  52 
  42 
  

  

  ,, 
  „ 
  reversed 
  92 
  8 
  20 
  

  

  Azimuthal 
  reading 
  for 
  magnetic 
  meridian 
  91 
  30 
  31 
  

  

  Azimuthal 
  reading 
  for 
  magnetic 
  axis 
  of 
  vibration- 
  

   magnet 
  91 
  28 
  

  

  Azimuthal 
  reading 
  for 
  mark 
  a 
  107 
  11 
  48 
  

  

  Azimuthal 
  reading 
  for 
  mark 
  ft 
  352 
  49 
  17 
  

  

  Absolute 
  azimuth 
  of 
  mark 
  a 
  224 
  4 
  38 
  

  

  Absolute 
  azimuth 
  of 
  mark 
  (3 
  109 
  42 
  7 
  

  

  Variation, 
  28° 
  23' 
  21" 
  from 
  a. 
  

  

  28 
  23 
  21 
  from/3. 
  

  

  The 
  determinations 
  of 
  the 
  absolute 
  azimuths 
  of 
  the 
  marks 
  are 
  as 
  

   follows:— 
  , 
  „ 
  

  

  April 
  15, 
  6 
  h 
  54 
  m 
  a.m. 
  Azimuth 
  of 
  a 
  = 
  224 
  5 
  42 
  

   15, 
  4 
  49 
  p. 
  vr. 
  „ 
  224 
  3 
  49 
  

  

  J 
  3 
  

  

  16, 
  7 
  22 
  a.m. 
  „ 
  224 
  5 
  10 
  

  

  „ 
  15, 
  4 
  49 
  p.m. 
  „ 
  0=109 
  41 
  9 
  

  

  „ 
  16, 
  7 
  22 
  a.m. 
  „ 
  109 
  43 
  4 
  

  

  ]S"o 
  direct 
  determination 
  of 
  the 
  latitude 
  could 
  be 
  made 
  under 
  favourable 
  

   circumstances 
  at 
  noon 
  or 
  equally 
  distant 
  from 
  and 
  near 
  noon, 
  on 
  account 
  

   of 
  the 
  only 
  stand 
  being 
  occupied 
  at 
  these 
  hours 
  for 
  the 
  magnetical 
  obser- 
  

   vations. 
  It 
  would 
  appear, 
  from 
  the 
  small 
  discordance 
  between 
  the 
  even- 
  

   ing 
  and 
  morning 
  determinations 
  of 
  the 
  azimuth 
  of 
  the 
  marks, 
  that 
  the 
  

   adopted 
  latitude 
  is 
  slightly 
  in 
  error. 
  The 
  mean 
  of 
  the 
  evening 
  and 
  

   morning 
  determinations 
  should, 
  however, 
  be 
  sensibly 
  accurate, 
  and 
  has 
  

   been 
  adopted. 
  

  

  