﻿» 
  MALLET 
  : 
  VOLCANOES 
  OF 
  BARREN 
  ISLAND 
  AND 
  NARCONDAM. 
  

  

  In 
  February 
  1884, 
  Captain 
  Hobday 
  and 
  I 
  visited 
  the 
  islands 
  in 
  the 
  

   Government 
  steamer 
  c 
  Celerity/ 
  commanded 
  by 
  Captain 
  Edwards, 
  and 
  

   spent 
  nine 
  days 
  at 
  Barren 
  Island 
  and 
  four 
  at 
  Narcondam. 
  During 
  that 
  

   time 
  Captain 
  Hobday 
  constructed 
  maps 
  of 
  the 
  volcanoes 
  on 
  the 
  scale 
  of 
  8 
  

   inches 
  to 
  the 
  mile, 
  of 
  which 
  copies, 
  reduced 
  to 
  the 
  scale 
  of 
  one-half, 
  are 
  

   herewith 
  appended. 
  The 
  results 
  of 
  my 
  geological 
  work 
  are 
  embodied 
  

   in 
  the 
  following 
  pages. 
  

  

  The 
  last 
  recorded 
  visit 
  previous 
  to 
  ours 
  was 
  made 
  in 
  1873, 
  by 
  

   Professor 
  V. 
  Ball, 
  late 
  of 
  the 
  Geological 
  Survey 
  of 
  India. 
  In 
  his 
  

   account 
  of 
  Barren 
  Island 
  * 
  attention 
  is 
  called 
  to 
  the 
  erroneous 
  idea 
  that 
  

   the 
  sea 
  surrounds 
  the 
  inner 
  cone, 
  which 
  seems 
  to 
  have 
  originated 
  with 
  

   Von 
  Buch, 
  and 
  to 
  have 
  been 
  accepted 
  on 
  his 
  authority 
  by 
  various 
  other 
  

   authors. 
  Although 
  the 
  misconception 
  on 
  this 
  point 
  had 
  been 
  previous- 
  

   ly 
  pointed 
  out 
  by 
  Dr. 
  Liebig 
  in 
  1858, 
  2 
  and 
  by 
  the 
  Rev. 
  Charles 
  Parish 
  

   in 
  1862, 
  3 
  it 
  has 
  been 
  repeated 
  in 
  text-books 
  of 
  geology 
  published 
  within 
  

   the 
  last 
  few 
  years. 
  Full 
  references 
  to 
  previous 
  accounts, 
  and 
  a, 
  precis 
  of 
  

   the 
  information 
  contained 
  in 
  them, 
  are 
  given 
  by 
  Mr. 
  Ball, 
  so 
  that 
  it 
  is 
  

   unnecessary 
  for 
  me 
  to 
  allude 
  to 
  them 
  further 
  here, 
  although 
  I 
  shall 
  have 
  

   occasion 
  to 
  cite 
  them 
  frequently 
  in 
  the 
  following 
  pages. 
  

  

  Barren 
  Island 
  lies 
  approximately 
  in 
  N. 
  lat. 
  1£°-15', 
  E. 
  long. 
  93°-50 
  / 
  , 
  

  

  and 
  Narcondam 
  in 
  N. 
  lat. 
  13°-26', 
  E. 
  long. 
  

  

  NarcJnTam 
  ittuate/on 
  94°-15'. 
  Most 
  writers 
  on 
  vulcanology 
  have 
  re- 
  

  

  theSundazoneofvolcanic 
  ded 
  tbem 
  ag 
  geafced 
  • 
  ^ 
  continuation 
  of 
  

  

  energy. 
  & 
  

  

  that 
  great 
  zone 
  of 
  volcanic 
  energy 
  which 
  stretches 
  

  

  for 
  some 
  2,000 
  miles 
  along 
  the 
  Sunda 
  group 
  of 
  islands, 
  the 
  terrible 
  activity 
  

   of 
  which 
  has 
  been 
  recently 
  illustrated 
  by 
  the 
  explosive 
  eruption 
  at 
  

   Northern 
  extension 
  of 
  Krakatau. 
  Some 
  authors, 
  Mrs. 
  Sommerville 
  and 
  

   the 
  zone. 
  Scrope 
  amongst 
  others, 
  consider 
  that 
  the 
  exten- 
  

  

  sion 
  of 
  the 
  same 
  zone 
  is 
  to 
  be 
  found 
  in 
  the 
  islands 
  of 
  Arakan, 
  some 
  of 
  

  

  1 
  Records, 
  Geol. 
  Surv. 
  India, 
  Vol. 
  VI, 
  page 
  81 
  ; 
  also 
  Geol. 
  Mag., 
  Lond., 
  1879, 
  Vol. 
  VI, 
  

   page 
  16. 
  

  

  2 
  Selections 
  from 
  the 
  Records 
  of 
  the 
  Government 
  of 
  India 
  (Home 
  Department), 
  

   No. 
  XXV, 
  page 
  124 
  ; 
  republished 
  in 
  J. 
  A. 
  S. 
  B., 
  Vol. 
  XXIX. 
  

  

  3 
  Froc. 
  Geog. 
  Soc, 
  Lond., 
  1862, 
  Vol. 
  VI, 
  page 
  216. 
  

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  252 
  ) 
  

  

  