﻿18/5.] 
  

  

  Observations 
  made 
  in 
  Little 
  Namaqualand. 
  

  

  557 
  

  

  The 
  absolute 
  azimuths 
  of 
  these 
  marks 
  determined 
  on 
  April 
  10 
  were 
  

  

  as 
  follows 
  : 
  — 
  ( 
  (J 
  

  

  Azimuth 
  of 
  northern 
  mark 
  147 
  8 
  22 
  

  

  „ 
  southern 
  mark 
  6 
  4 
  33 
  

  

  Variation 
  from 
  northern 
  mark 
  28 
  54 
  17 
  

  

  „ 
  southern 
  mark 
  28 
  54 
  52 
  

  

  Variation, 
  April 
  12, 
  10 
  h 
  28 
  54 
  35 
  

  

  Vibration 
  Observations. 
  

  

  April 
  12, 
  ll 
  11 
  20 
  s 
  . 
  Temperature 
  72°. 
  90p=2' 
  10". 
  r 
  1 
  = 
  5 
  s 
  -0543, 
  

   r 
  2 
  ==5 
  s 
  *0529, 
  r=5 
  s 
  -0536. 
  

  

  The 
  changes 
  of 
  temperature 
  were 
  considerable 
  ; 
  at 
  times 
  a 
  cold 
  damp 
  

   mist 
  passed 
  over 
  from 
  the 
  sea. 
  

  

  The 
  latitude 
  was 
  determined 
  on 
  April 
  12, 
  near 
  noon, 
  and 
  found 
  to 
  be 
  

   29° 
  15' 
  30". 
  

  

  On 
  my 
  return 
  to 
  Port 
  Xolloth 
  I 
  was 
  detained 
  six 
  days 
  waiting 
  for 
  the 
  

   steamer, 
  which 
  lay 
  outside 
  the 
  bar, 
  but 
  could 
  not 
  cross 
  on 
  account 
  of 
  

   rough 
  weather. 
  During 
  the 
  greater 
  part 
  of 
  this 
  time 
  a 
  dense 
  damp 
  mist 
  

   prevailed 
  that 
  rendered 
  observations 
  impossible. 
  I 
  was, 
  however, 
  anxious 
  

   to 
  repeat, 
  at 
  least, 
  the 
  determination 
  of 
  the 
  variation 
  ; 
  and 
  this 
  was 
  done 
  

   on 
  May 
  3, 
  3 
  h 
  . 
  The 
  station 
  was 
  one 
  rather 
  nearer 
  the 
  sea 
  than 
  that 
  first 
  

   chosen. 
  

  

  Temperature 
  70°*2. 
  90^ 
  = 
  10' 
  17". 
  Correction 
  -0' 
  55". 
  

   Azimuthal 
  reading 
  for 
  magnetical 
  meridian, 
  May 
  3, 
  3 
  h 
  : 
  — 
  

  

  O 
  / 
  II 
  

  

  Suspension 
  direct 
  319 
  17 
  24 
  

  

  „ 
  reversed 
  318 
  51 
  48 
  

  

  Beading 
  = 
  319 
  4 
  36 
  

  

  Torsion 
  correction 
  . 
  . 
  . 
  . 
  = 
  55 
  

  

  319 
  3 
  41 
  

  

  Eeading 
  for 
  mark 
  320 
  27 
  2 
  

  

  Excess 
  of 
  reading 
  for 
  mark 
  1° 
  23' 
  21" 
  

  

  The 
  azimuth 
  of 
  the 
  mark 
  was 
  found 
  as 
  follows 
  : 
  — 
  

  

  1874, 
  May 
  3 
  152 
  26 
  49 
  

  

  May 
  5 
  152 
  26 
  41 
  

  

  The 
  variation 
  on 
  May 
  3, 
  3 
  h 
  =28° 
  56' 
  36". 
  The 
  results 
  for 
  Port 
  

   Kolloth 
  are 
  therefore 
  as 
  follows 
  : 
  — 
  

  

  ^Variation 
  =28° 
  55' 
  36" 
  { 
  ™an 
  of 
  i-esiilts 
  % 
  April 
  12 
  

  

  [ 
  and 
  May 
  3. 
  

  

  X= 
  Horizontal 
  force 
  = 
  4*4464 
  

   m= 
  Magnetic 
  moment 
  = 
  0*4264 
  

   D=Dip 
  =53° 
  22' 
  46" 
  

  

  E 
  = 
  Total 
  force 
  = 
  74540 
  

  

  