﻿536 
  ON 
  THE 
  SILURIAN 
  STRATA 
  OF 
  THE 
  BALTIC 
  PROVINCES. 
  

  

  beds. 
  This 
  line 
  is 
  drawn 
  at 
  a 
  different 
  horizon 
  from 
  that 
  which 
  is 
  

   taken 
  by 
  English 
  geologists. 
  There 
  is 
  therefore 
  only 
  one 
  widely 
  

   spread 
  break 
  occurring 
  in 
  this 
  group 
  of 
  rocks, 
  and 
  it 
  is 
  that 
  sepa- 
  

   rating 
  the 
  Cambrian 
  System 
  of 
  Professor 
  Sedgwick 
  from 
  Sir 
  Eoderick 
  

   Murchison's 
  Silurian 
  System. 
  

  

  Dr. 
  Hicks 
  bore 
  testimony 
  to 
  the 
  great 
  value 
  of 
  Dr. 
  Schmidt's 
  

   paper. 
  He 
  could 
  see 
  no 
  reason 
  for 
  doubting 
  the 
  continuity 
  of 
  the 
  

   whole 
  series 
  as 
  maintained 
  by 
  Dr. 
  Schmidt. 
  It 
  was 
  impossible 
  to 
  

   believe 
  that 
  these 
  stratigraphical 
  breaks 
  were 
  universal, 
  as 
  Prof. 
  

   Hughes 
  and 
  Mr. 
  Marr 
  seemed 
  to 
  suppose. 
  

  

  