﻿162 
  THEOBALD: 
  GEOLOGY 
  OF 
  PEGU. 
  

  

  into 
  the 
  well 
  to 
  the 
  ordinary 
  action 
  of 
  gravity, 
  the 
  oil 
  welling 
  out 
  from 
  

   minute 
  cracks 
  in 
  which 
  it 
  lay 
  stored, 
  but 
  which 
  a 
  heavy 
  column 
  of 
  water 
  

   thirty-five 
  cubits 
  high 
  effectually 
  held 
  in 
  check 
  by 
  simple 
  hydrostatic 
  

   pressure 
  on 
  the 
  cracks 
  and 
  veins 
  containing 
  the 
  oil, 
  and 
  I 
  expressed 
  a 
  

   belief 
  that 
  on 
  operations 
  being 
  resumed 
  and 
  the 
  well 
  emptied 
  of 
  water 
  

   and 
  deepened, 
  the 
  flow 
  of 
  oil 
  would 
  again 
  commence, 
  and 
  this 
  opinion 
  

   has 
  been, 
  I 
  am 
  informed, 
  fully 
  verified. 
  

  

  The 
  specific 
  gravity 
  of 
  the 
  Burmese 
  petroleums 
  from 
  different 
  

  

  localities 
  varies 
  : 
  — 
  

  

  A 
  specimen 
  of 
  light-colored 
  oil 
  from 
  Kyoukhpew 
  showed 
  

  

  a 
  specific 
  gravity 
  of 
  ... 
  ... 
  ... 
  '815 
  

  

  A 
  sample 
  from 
  the 
  locality 
  west 
  of 
  Prome 
  ... 
  ... 
  *847 
  

  

  A 
  sample 
  of 
  the 
  Padouk-ben 
  oil 
  ... 
  ... 
  ... 
  *909 
  

  

  A 
  very 
  brief 
  extract 
  from 
  the 
  Progress 
  Report 
  of 
  the 
  Geological 
  

   Survey 
  of 
  Canada 
  by 
  Sir 
  W. 
  Logan 
  in 
  1863 
  will 
  suffice 
  to 
  show 
  the 
  

   essentially 
  different 
  conditions 
  under 
  which 
  the 
  Canadian 
  and 
  the 
  

   Burmese 
  and 
  Indian 
  oils 
  are 
  produced, 
  the 
  latter 
  originating, 
  as 
  far 
  as 
  

   can 
  be 
  judged, 
  in 
  early 
  Tertiary 
  strata, 
  the 
  former 
  being 
  developed 
  

   exclusively 
  in 
  rocks 
  of 
  Palaeozoic 
  age. 
  

  

  At 
  page 
  788, 
  Sir 
  ~W. 
  Logan 
  thus 
  describes 
  the 
  stratigraphical 
  

   position 
  of 
  the 
  napthagenous 
  strata 
  in 
  Canada 
  : 
  — 
  " 
  It 
  has 
  already 
  been 
  

   shown 
  that 
  the 
  petroleum 
  of 
  Canada 
  occurs 
  in 
  two 
  distinct 
  horizons, 
  

   the 
  one 
  in 
  the 
  limestones 
  of 
  the 
  Trenton 
  group, 
  and 
  the 
  other 
  in 
  those 
  

   of 
  the 
  Corniferous 
  formation. 
  To 
  this 
  it 
  must 
  now 
  be 
  added 
  that 
  the 
  

   petroleum 
  of 
  Gaspe 
  probably 
  belongs 
  to 
  an 
  intermediate 
  position, 
  and 
  

   is 
  to 
  be 
  referred 
  to 
  limestones 
  of 
  Upper 
  Silurian 
  age," 
  the 
  Trenton 
  

   group 
  corresponding 
  to 
  the 
  English 
  Caradoc 
  or 
  Bala 
  beds 
  of 
  Lower 
  

   Silurian 
  age, 
  the 
  Gaspe 
  beds 
  to 
  the 
  Ludlow 
  zone 
  of 
  Upper 
  Silurian 
  

   age, 
  and 
  the 
  Corniferous 
  formation 
  to 
  the 
  middle 
  Devonian 
  of 
  European 
  

   geology. 
  Paraffine, 
  so 
  largely 
  consumed 
  now 
  in 
  the 
  manufacture 
  of 
  

   candles, 
  occurs 
  in 
  greatest 
  quantity 
  in 
  the 
  Burmese 
  petroleum 
  of 
  com- 
  

   merce, 
  the 
  product 
  of 
  the 
  wells 
  in 
  Upper 
  Burmah. 
  Paraffine, 
  accordiDg 
  

  

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  ) 
  

  

  