﻿562 
  Magnetical 
  Observations 
  in 
  Little 
  Namaqu 
  aland. 
  [June 
  17, 
  

  

  appeared, 
  from 
  similar 
  barometrical 
  determinations, 
  to 
  be 
  from 
  1500 
  to 
  

   1700 
  feet 
  above 
  the 
  sea-level. 
  The 
  position 
  was 
  not 
  altogether 
  a 
  favour- 
  

   able 
  one 
  for 
  magnetical 
  observations. 
  I 
  had 
  but 
  little 
  choice 
  of 
  stations. 
  

   I 
  fear 
  some 
  little 
  local 
  magnetic 
  disturbances 
  in 
  the 
  observations 
  made 
  

   here, 
  such 
  that 
  the 
  elements 
  might 
  have 
  been 
  found 
  to 
  have 
  differed 
  

   somewhat 
  considerably 
  with 
  a 
  comparatively 
  small 
  shift 
  in 
  geographical 
  

   position. 
  I 
  should 
  therefore 
  have 
  been 
  glad 
  to 
  have 
  supplemented 
  these 
  

   observations 
  with 
  a 
  set 
  on 
  the 
  Bushman 
  flats, 
  the 
  bed 
  of 
  a 
  recent 
  sea 
  

   with 
  numerous 
  islands 
  (kopies) 
  ; 
  but 
  this 
  could 
  not 
  have 
  been 
  done 
  with- 
  

   out 
  proper 
  arrangements 
  for 
  the 
  supply 
  of 
  water. 
  

  

  Dip 
  Observations. 
  

  

  April 
  26, 
  9\ 
  A 
  2 
  South 
  53 
  39 
  18 
  

  

  A 
  2 
  North 
  54 
  14 
  

  

  Dip 
  = 
  53° 
  49' 
  46", 
  

   a 
  larger 
  dip 
  than 
  that 
  obtained 
  at 
  any 
  other 
  station 
  by 
  about 
  2'. 
  

   The 
  latitude 
  was 
  determined 
  near 
  noon. 
  

  

  V 
  ariation. 
  

  

  April 
  26, 
  l 
  h 
  . 
  o 
  , 
  a 
  

  

  Azimuthal 
  reading 
  of 
  mark 
  266 
  33 
  45 
  

  

  f 
  351 
  26 
  45 
  

  

  Variation-magnet 
  i 
  28 
  33 
  

  

  Eeading 
  for 
  magnetical 
  meridian 
  350 
  57 
  39 
  

  

  Beading 
  with 
  vibration-magnet 
  350 
  58 
  50 
  

  

  Azimuthal 
  reading 
  of 
  mark 
  repeated 
  266 
  34 
  

  

  Excess 
  reading 
  for 
  the 
  magnetic 
  meridian 
  =84 
  23 
  46 
  

  

  Vibrations. 
  

  

  April 
  26, 
  2 
  h 
  . 
  Temperature 
  80°. 
  90p 
  = 
  6' 
  45". 
  

   Three 
  threads 
  were 
  used 
  for 
  suspension 
  at 
  this 
  station, 
  but 
  the 
  torsion 
  

   was 
  carefully 
  got 
  rid 
  of. 
  

  

  ri 
  = 
  5 
  s 
  -0988, 
  r 
  2 
  = 
  5 
  p 
  -0920, 
  r=5 
  s 
  -0954. 
  

  

  Deflections. 
  

   April 
  27, 
  10\ 
  Temperature 
  79°-5. 
  

  

  Distance 
  1*0 
  foot 
  

  

  10 
  59 
  45 
  

  

  11 
  3 
  50 
  

   11 
  4 
  10 
  

  

  111 
  40 
  

  

  Hence 
  X=4-3798, 
  m==0-4271. 
  

  

  w=ll° 
  2 
  

  

  o 
  o' 
  a" 
  

  

  