﻿534 
  The 
  Magnetic 
  Elements 
  at 
  the 
  Cape 
  of 
  Good 
  Hope. 
  

  

  § 
  3. 
  Declination. 
  

  

  The 
  following 
  list 
  contains 
  all 
  the 
  records 
  of 
  declination 
  

   determination 
  at 
  the 
  Gape 
  o£ 
  Good 
  Hope 
  which 
  have 
  come 
  

   under 
  our 
  observation. 
  

  

  Date. 
  

  

  Observers. 
  

  

  Declination. 
  

  

  Authorities. 
  

  

  Remarks. 
  

  

  1605. 
  

  

  Davis 
  

  

  30 
  B. 
  of 
  N. 
  

  

  1609. 
  

  

  Keeling 
  

  

  12 
  W. 
  of 
  N 
  

  

  1614. 
  

  

  Pring 
  

  

  1 
  30 
  „ 
  

  

  1614. 
  

  

  Daunton 
  

  

  1 
  45 
  „ 
  

  

  1622. 
  

  

  

  2 
  „ 
  

  

  1675. 
  

  

  

  8 
  „ 
  

  

  1675. 
  

  

  Leydeker 
  

  

  8 
  28 
  „ 
  

  

  1691. 
  

  

  

  11 
  „ 
  

  

  1721. 
  

  

  Mathews 
  

  

  16 
  25 
  „ 
  

  

  1724. 
  

  

  Mathews 
  

  

  16 
  23 
  „ 
  

  

  1751. 
  

  

  

  19 
  15 
  ,. 
  

  

  1753. 
  

  

  La 
  Caille 
  

  

  19 
  00 
  „ 
  

  

  1768. 
  

  

  Wallis 
  

  

  19 
  30 
  „ 
  

  

  1768. 
  

  

  Carteret 
  

  

  19 
  30 
  „ 
  

  

  1770. 
  

  

  Ekeberg 
  

  

  19 
  10 
  „ 
  

  

  1771. 
  

  

  Cook 
  

  

  20 
  30 
  „ 
  

  

  1772. 
  

  

  Wales 
  

  

  20 
  26 
  „ 
  

  

  1774. 
  

  

  Ekeber°" 
  

  

  21 
  39 
  „ 
  

  

  1774. 
  

  

  Dayley 
  

  

  21 
  36 
  „ 
  

  

  1775. 
  

  

  Wales.... 
  

  

  21 
  14 
  „ 
  

  

  1780. 
  

  

  Cook 
  

  

  22 
  16 
  „ 
  

  

  1783. 
  

  

  Lodberg 
  

  

  22 
  23 
  „ 
  

  

  1788. 
  

  

  Bligh 
  

  

  24 
  4 
  „ 
  

  

  1791. 
  

  

  Vancouver 
  

  

  25 
  40 
  „ 
  

  

  1792. 
  

  

  Dentrecasteaux 
  

  

  24 
  31 
  „ 
  

  

  1818. 
  

  

  Freycinet 
  

  

  26 
  31 
  „ 
  

  

  1836. 
  

  

  Fitzroy 
  

  

  28 
  30 
  „ 
  

  

  1839. 
  

  

  DuPetit-Thouars... 
  

  

  29 
  9 
  „ 
  

  

  1841. 
  

  

  E.. 
  A. 
  Detachment 
  ... 
  

  

  29 
  0-2 
  „ 
  

  

  1842. 
  

  

  R.A. 
  

  

  29 
  50 
  ., 
  

  

  1843. 
  

  

  R.A. 
  

  

  29 
  6-0 
  „ 
  

  

  1844. 
  

  

  R.A. 
  

  

  29 
  6-2 
  „ 
  

  

  1845. 
  

  

  R.A. 
  

  

  29 
  7-4 
  „ 
  

  

  1846. 
  

  

  R.A. 
  

  

  29 
  9-2 
  „ 
  

  

  1847. 
  

  

  

  29 
  124 
  „ 
  

  

  1848. 
  

  

  

  29 
  140 
  „ 
  

  

  1849. 
  

  

  

  29 
  16-4 
  „ 
  

  

  1850. 
  

  

  

  29 
  18-8 
  „ 
  

  

  1851. 
  

  

  

  29 
  20-9 
  ,, 
  

  

  1852. 
  

  

  

  29 
  22-9 
  „ 
  

  

  )ct. 
  11, 
  1857. 
  

  

  

  29 
  344 
  „ 
  

  

  1860. 
  

  

  

  29 
  41-8 
  ., 
  

  

  1861. 
  

  

  

  29 
  44-8 
  t> 
  

  

  1862. 
  

  

  

  29 
  50-3 
  ., 
  

  

  1863. 
  

  

  

  29 
  521 
  „ 
  

  

  1864. 
  

  

  

  29 
  53-9 
  „ 
  

  

  1865. 
  

  

  

  30 
  01 
  „ 
  

  

  1866. 
  

  

  

  30 
  2-0 
  , 
  

  

  1867. 
  

  

  

  30 
  1-7 
  „ 
  

  

  1868. 
  

  

  

  30 
  1-9 
  „ 
  

  

  Jan. 
  1869. 
  

  

  

  30 
  1-5 
  „ 
  

  

  Nov. 
  1873. 
  

  

  

  30 
  4-0 
  „ 
  

  

  Jan. 
  1890. 
  

  

  Preston 
  

  

  29 
  360 
  „ 
  

  

  Jan. 
  1895. 
  

  

  Finlay 
  

  

  29 
  18-0 
  „ 
  

  

  Nov. 
  1897. 
  

  

  Finlay 
  

  

  29 
  2-0 
  „ 
  

  

  Dec. 
  1900. 
  

  

  Beattie 
  & 
  Morrison 
  

  

  2S 
  530 
  „ 
  

  

  

  Taken 
  from 
  Sabine's 
  

  

  Mao-uetical 
  and 
  

  

  Meteorological 
  Ob- 
  

  

  servations 
  at 
  the 
  

  

  | 
  Cape 
  of 
  Good 
  Hope. 
  

   Vol. 
  I. 
  Magnetism. 
  

  

  

  

  R. 
  Obs. 
  C. 
  of 
  G. 
  Hop< 
  

   Magnetic 
  Records. 
  

   Reise 
  der 
  ' 
  No 
  vara.' 
  

  

  From 
  April 
  1841 
  to 
  July 
  1846 
  inclu- 
  

   sive 
  the 
  declination 
  was 
  observed 
  

   hourly. 
  The 
  declination 
  given 
  for 
  

   each 
  year 
  is 
  the 
  mean 
  of 
  all 
  the 
  ob- 
  

   servations 
  for 
  that 
  year. 
  

   From 
  Sept. 
  1846 
  to 
  Aug. 
  1850 
  the 
  

   declination 
  was 
  observed 
  five 
  times 
  

   daily. 
  The 
  declination 
  given 
  for 
  

   the 
  year 
  is 
  the 
  mean 
  of 
  all 
  the 
  ob- 
  

   servations 
  for 
  that 
  year. 
  

  

  From 
  Sept. 
  1850 
  to 
  Mar. 
  

   1852 
  the 
  declination 
  was 
  

   observed 
  five 
  times 
  dailv. 
  

  

  Magnetic 
  Records, 
  R. 
  

   Obs. 
  C. 
  of 
  G. 
  Hope. 
  

  

  ' 
  Challenger 
  ' 
  Reports, 
  

   Narrative, 
  vol. 
  ii. 
  

  

  U.S. 
  Coast 
  and 
  Geodetic 
  

   Survey, 
  Bull. 
  23. 
  

  

  Magnetic 
  Records, 
  R. 
  

   Obs. 
  C. 
  of 
  G. 
  Hope. 
  

  

  From 
  October 
  1860 
  U 
  

   January 
  1869 
  the 
  

   declination 
  was 
  ob- 
  

   served 
  twice 
  daily. 
  

  

  