﻿558 
  Proceedings. 
  

  

  4. 
  " 
  Description 
  of 
  a 
  new 
  Crustacean 
  from 
  the 
  Auckland 
  Islands," 
  by 
  

   George 
  M. 
  Thomson. 
  [Transactions, 
  p. 
  249.) 
  

  

  Ninth 
  Meeting. 
  2ith 
  September, 
  1878. 
  

  

  W. 
  N. 
  Blair, 
  President, 
  in 
  the 
  chair. 
  

  

  New 
  Members. 
  — 
  C. 
  H. 
  Eobson, 
  A. 
  Moritzson. 
  

  

  The 
  Eev. 
  A. 
  E. 
  Fitchett 
  gave 
  a 
  lecture 
  on 
  " 
  Domestic 
  ^Esthetics, 
  and 
  

   the 
  Higher 
  Education 
  of 
  Women." 
  

  

  Tenth 
  Meeting. 
  8th 
  October, 
  1878. 
  

   Prof. 
  Hutton, 
  Vice-president, 
  in 
  the 
  chair. 
  

   New 
  Members. 
  — 
  Mrs. 
  Edwards, 
  Miss 
  V. 
  Edwards, 
  W. 
  G. 
  Jenkins. 
  

   1. 
  " 
  On 
  Magnetic 
  Dip," 
  by 
  A. 
  H. 
  Eoss. 
  

  

  ABSTBACT. 
  

  

  After 
  describing 
  the 
  nature 
  of 
  magnetic 
  dip 
  and 
  the 
  circumstances 
  that 
  

   led 
  to 
  its 
  discovery, 
  the 
  author 
  proceeds 
  to 
  state 
  that 
  " 
  the 
  first 
  magnetical 
  

   observation 
  taken 
  on 
  the 
  shores 
  of 
  New 
  Zealand 
  of 
  which 
  I 
  can 
  find 
  any 
  

   record 
  was 
  taken 
  by 
  Captain 
  Cook 
  at 
  Dusky 
  Bay 
  in 
  May, 
  1773, 
  one 
  hun- 
  

   dred 
  and 
  five 
  years 
  ago. 
  He 
  then 
  found 
  by 
  tliree 
  different 
  needles 
  the 
  

   variation 
  or 
  declination 
  to 
  be 
  13° 
  49' 
  E., 
  and 
  the 
  dip 
  or 
  inchnation 
  70° 
  5' 
  45". 
  

   The 
  next 
  observation, 
  in 
  the 
  same 
  place, 
  was 
  taken 
  by 
  Captain 
  Stokes 
  in 
  

   1851, 
  the 
  declination 
  then 
  being 
  15° 
  34' 
  E., 
  and 
  the 
  inclination 
  69° 
  47', 
  the 
  

   decrease 
  in 
  the 
  angle 
  of 
  inclination 
  having 
  been 
  18' 
  45" 
  in 
  seventy-eight 
  

   years. 
  It 
  is 
  not 
  at 
  all 
  improbable, 
  however, 
  that 
  the 
  inclination 
  was 
  

   increasing 
  in 
  1773, 
  and 
  having 
  attained 
  its 
  maximum 
  at 
  some 
  period 
  of 
  

   which 
  we 
  have 
  no 
  record, 
  had 
  decreased 
  to 
  the 
  amount 
  observed 
  by 
  Captain 
  

   Stokes 
  in 
  1851. 
  

  

  " 
  The 
  inclination 
  of 
  the 
  needle 
  is 
  also 
  subject 
  to 
  diurnal 
  variation, 
  being 
  

   in 
  the 
  morning 
  of 
  each 
  day 
  4' 
  greater 
  than 
  in 
  the 
  afternoon 
  ; 
  it 
  also 
  changes 
  

   when 
  the 
  needle 
  is 
  elevated 
  to 
  considerable 
  heights. 
  

  

  "I 
  have 
  made 
  these 
  few 
  remarks 
  in 
  reference 
  to 
  the 
  inchnation 
  with 
  a 
  

   view 
  of 
  compensating 
  for 
  the 
  dryness 
  of 
  what 
  is 
  really 
  my 
  paper 
  of 
  to- 
  

   night, 
  and 
  which 
  consists 
  solely 
  of 
  a 
  tabulated 
  statement 
  of 
  observations 
  

   made 
  by 
  me 
  during 
  a 
  recent 
  voyage 
  from 
  England, 
  chiefly 
  with 
  the 
  object 
  

   of 
  ascertaining 
  the 
  position 
  in 
  reference 
  to 
  the 
  geographical 
  equator 
  of 
  the 
  

   point 
  in 
  the 
  magnetic 
  equator 
  over 
  which 
  our 
  vessel 
  passed, 
  and 
  which 
  is 
  

   shown 
  to 
  have 
  been 
  situated 
  in 
  latitude 
  8° 
  30' 
  S. 
  and 
  longitude 
  25° 
  30' 
  W. 
  

   The 
  observations 
  were 
  taken 
  whenever 
  practicable 
  by 
  means 
  of 
  an 
  instru- 
  

   ment 
  specially 
  constructed 
  for 
  the 
  purpose 
  by 
  Mr. 
  Casella, 
  of 
  London. 
  At 
  

   the 
  commencement 
  of 
  the 
  voyage, 
  the 
  case 
  containing 
  my 
  instruments 
  was 
  

  

  