﻿550 
  

  

  Mr. 
  I. 
  L. 
  

  

  Bell 
  on 
  some 
  

  

  

  [June 
  17, 
  

  

  

  Charred 
  coaly 
  

  

  Strong 
  blue 
  

  

  Grey 
  post 
  

  

  Eire- 
  

  

  

  

  shale. 
  

  

  stone. 
  

  

  clay. 
  

  

  Thickness 
  

  

  Oft, 
  3 
  in. 
  

  

  9 
  ft. 
  4 
  in. 
  

  

  1 
  ft. 
  Sin. 
  

  

  oft 
  in 
  

  

  

  39-80 
  

  

  52-85 
  

  

  67-30 
  

  

  61-65 
  

  

  

  . 
  29-91 
  

  

  28-15 
  

  

  9-47 
  

  

  23-77 
  

  

  Protoxide 
  of 
  iron 
  

  

  . 
  . 
  2-60 
  

  

  4-62 
  

  

  11-81 
  

  

  . 
  . 
  . 
  . 
  4-64 
  

  

  Sulphide 
  of 
  iron 
  

  

  

  

  

  -03 
  

  

  Lime 
  

  

  •64 
  .... 
  

  

  •68 
  

  

  1-01 
  

  

  -15 
  

  

  

  . 
  . 
  1-19 
  

  

  2-13 
  

  

  2-16 
  

  

  . 
  . 
  . 
  . 
  2-49 
  

  

  Potash 
  

  

  2-60 
  

  

  1-52 
  

  

  •61 
  

  

  2-24 
  

  

  Soda 
  

  

  •84 
  

  

  •92 
  

  

  •81 
  

  

  •21 
  

  

  Carbonic 
  acid 
  

  

  

  

  4-53 
  

  

  

  Water 
  

  

  

  8-05 
  

  

  3-35 
  

  

  5-41 
  

  

  Carbon 
  

  

  22-24 
  

  

  1-30 
  

  

  

  

  

  99-82 
  

  

  100-22 
  

  

  101-05 
  

  

  100-59 
  

  

  Having 
  now 
  considered 
  the 
  changes 
  which 
  the 
  intruded 
  igneous 
  rock 
  

   has 
  undergone, 
  the 
  alterations 
  may 
  be 
  examined 
  which 
  the 
  presence 
  of 
  a 
  

   vast 
  mass 
  of 
  highly 
  heated 
  matter 
  has 
  effected 
  on 
  the 
  adjacent 
  sedimen- 
  

   tary 
  rocks. 
  

  

  The 
  small 
  amount 
  of 
  volatile 
  constituents 
  left 
  in 
  the 
  thin 
  seam 
  of 
  

   coal 
  immediately 
  underlying 
  the 
  bed 
  of 
  whin 
  in 
  the 
  pit 
  has 
  been 
  already 
  

   explained. 
  At 
  a 
  distance 
  of 
  about 
  17 
  feet 
  below 
  this 
  is 
  a 
  second 
  bed 
  of 
  

   coal 
  5 
  inches 
  in 
  thickness 
  ; 
  but 
  to 
  it 
  the 
  intervening 
  rocks 
  have 
  acted 
  in 
  

   some 
  degree 
  as 
  a 
  protection 
  against 
  the 
  volatilizing 
  power 
  of 
  the 
  heated 
  

   basalt 
  lying 
  above. 
  

  

  By 
  its 
  analysis 
  the 
  following 
  results 
  were 
  obtained 
  : 
  — 
  

  

  Carbon 
  78*05 
  

  

  Hydrogen 
  3/78 
  

  

  Oxygen 
  4-32 
  

  

  Sulphur 
  4-33 
  

  

  Ash 
  10-15 
  

  

  100-63 
  

  

  At 
  a 
  further 
  depth 
  of 
  about 
  35 
  feet 
  from 
  this 
  perhaps 
  slightly 
  altered 
  

   coal, 
  or 
  52 
  feet 
  below 
  the 
  bed 
  of 
  basalt, 
  is 
  another 
  nearly 
  5 
  feet 
  thick, 
  

   known 
  as 
  the 
  Busty, 
  which 
  is 
  one 
  of 
  the 
  well-known 
  cokiug 
  seams 
  of 
  the 
  

   country. 
  When 
  the 
  coal 
  from 
  it 
  is 
  compared 
  with 
  that 
  obtained 
  from 
  

   the 
  same 
  bed 
  two 
  miles 
  away, 
  there 
  is 
  perceptible 
  difference 
  to 
  be 
  ob- 
  

   served. 
  We 
  may 
  therefore 
  infer 
  that 
  the 
  emission 
  of 
  heat 
  from 
  the 
  

   thick 
  body 
  of 
  melted 
  basalt 
  lying 
  about 
  50 
  feet 
  above 
  it 
  was 
  at 
  the 
  time 
  

   of 
  cooling 
  so 
  slow 
  as 
  not 
  to 
  have 
  affected 
  the 
  composition 
  of 
  this 
  coal, 
  

   which 
  loses 
  at 
  moderately 
  high 
  temperatures 
  35 
  per 
  cent, 
  of 
  its 
  weight. 
  

  

  Looking 
  at 
  the 
  very 
  complex 
  nature 
  of 
  the 
  composition, 
  already 
  re- 
  

   ferred 
  to, 
  of 
  the 
  coaly 
  shale, 
  strong 
  blue 
  shale, 
  and 
  grey 
  post 
  stone, 
  it 
  

  

  