﻿BARREN 
  ISLAND. 
  5 
  

  

  The 
  frontispiece, 
  copied, 
  with 
  Mr. 
  Jules 
  Schaumburg's 
  usual 
  artistic 
  

   skill, 
  from 
  a 
  photograph 
  taken 
  during 
  our 
  visit 
  by 
  Mr. 
  C. 
  F. 
  Wight 
  > 
  

   2nd 
  officer 
  of 
  the 
  I. 
  Gr. 
  S. 
  * 
  Celerity/ 
  gives 
  a 
  very 
  good 
  idea 
  of 
  the 
  

   central 
  cone 
  and 
  the 
  lava 
  streams 
  at 
  the 
  base. 
  The 
  point 
  of 
  view 
  is 
  a 
  

   slight 
  eminence 
  about 
  200 
  yards 
  south 
  of 
  the 
  hot 
  spring. 
  

  

  As 
  mentioned 
  above, 
  the 
  great 
  crater 
  is 
  about 
  a 
  mile 
  in 
  diameter, 
  the 
  

  

  diameter 
  of 
  the 
  island, 
  which 
  is 
  not 
  far 
  from 
  

   The 
  ancient 
  cone. 
  . 
  ... 
  

  

  circular, 
  being 
  about 
  twice 
  as 
  much. 
  The 
  external 
  

  

  slopes 
  are 
  naturally 
  longesu 
  on 
  the 
  side 
  where 
  the 
  edge 
  of 
  the 
  crater 
  is 
  

  

  highest, 
  and, 
  in 
  consequence 
  of 
  this, 
  the 
  centre 
  of 
  the 
  island 
  does 
  not 
  

  

  quite 
  coincide 
  with 
  the 
  centre 
  of 
  the 
  crater. 
  

  

  This 
  leads 
  to 
  the 
  question 
  why 
  one 
  side 
  of 
  the 
  crater 
  is 
  higher 
  than 
  

  

  w 
  m 
  the 
  remaining 
  portion 
  of 
  the 
  circumference. 
  It 
  

   Inequality 
  of 
  the 
  N.W. 
  m 
  ° 
  

  

  and 
  S.E. 
  sides 
  of 
  the 
  is 
  well 
  known 
  that 
  cones 
  formed 
  mainly 
  of 
  scoriae, 
  

   &c, 
  are 
  often 
  highest 
  on 
  the 
  side 
  to 
  leeward 
  with 
  

   respect 
  to 
  the 
  prevalent 
  wind, 
  but 
  the 
  peculiarity 
  in 
  question, 
  if 
  due 
  in 
  any 
  

   degree 
  to 
  this 
  cause, 
  can 
  only 
  be 
  so 
  very 
  partially 
  and 
  indirectly. 
  The 
  

   prevalent 
  winds 
  in 
  the 
  region 
  under 
  discussion 
  are 
  the 
  south-west 
  and 
  

   the 
  north-east 
  monsoons, 
  the 
  former 
  blowing 
  for 
  six 
  months 
  of 
  the 
  year, 
  

   and 
  with 
  considerably 
  more 
  force 
  than 
  the 
  latter, 
  which 
  blows 
  for 
  the 
  

   remaining 
  six. 
  1 
  There 
  would 
  be 
  a 
  tendency 
  therefore 
  for 
  the 
  fragmentary 
  

   ejecta 
  to 
  accumulate, 
  during 
  the 
  course 
  of 
  ages, 
  most 
  abundantly 
  

   on 
  the 
  north-eastern 
  side 
  of 
  the 
  volcano, 
  with 
  a 
  minor 
  accumulation 
  

   to 
  the 
  south-west, 
  and 
  a 
  minimum 
  quantity 
  on 
  the 
  intervening 
  portions. 
  

  

  rugged 
  streams 
  of 
  lava 
  which 
  have 
  poured 
  down 
  the 
  valleys 
  hear 
  no 
  slight 
  resemblance 
  in 
  

   general 
  fornrto 
  a 
  bifurcating 
  glacier 
  with 
  its 
  moraine-covered 
  and 
  fissured 
  surface, 
  while 
  the 
  

   ash 
  slopes, 
  formed, 
  as 
  they 
  have 
  been, 
  like 
  those 
  of 
  snow, 
  by 
  particles 
  of 
  matter 
  falling 
  

   through 
  the 
  air, 
  preserve 
  very 
  similar 
  contours. 
  Looked 
  at 
  with 
  a 
  not 
  too 
  critical 
  eye, 
  the 
  

   black 
  and 
  white 
  products 
  of 
  heat 
  and 
  of 
  cold 
  bear 
  somewhat 
  the 
  same 
  relation 
  to 
  each 
  other 
  

   that 
  a 
  nesrative 
  photograph 
  bears 
  to 
  the 
  positive. 
  

  

  1 
  The 
  mean 
  velocity 
  of 
  the 
  wind 
  at 
  Port 
  Blair 
  during 
  the 
  south-west 
  monsoon 
  is 
  rather 
  

   more 
  than 
  1£ 
  times 
  that 
  during 
  north-east 
  (Report 
  on 
  the 
  Meteorology 
  of 
  India 
  in 
  1882). 
  

   The 
  pressure, 
  therefore, 
  which 
  varies 
  as 
  the 
  square 
  of 
  the 
  velocity, 
  would 
  be 
  about 
  2# 
  times 
  

   as 
  great. 
  

  

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  ) 
  

  

  