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  GEOLOGY. 
  

  

  The 
  well 
  at 
  Lillers, 
  has 
  been 
  in 
  use 
  since 
  the 
  begin- 
  

   ning 
  of 
  the 
  twelfth 
  century, 
  and 
  has 
  aiforded, 
  during 
  a 
  

   period 
  of 
  seven 
  hundred 
  years, 
  a 
  constant 
  and 
  undimi- 
  

   nished 
  supply 
  of 
  water. 
  

  

  The 
  wells 
  at 
  Elbeuf, 
  Tours, 
  and 
  Eouen 
  have, 
  during 
  

   a 
  long 
  period, 
  been 
  equally 
  constant; 
  and 
  the 
  inference 
  

   is 
  that 
  such 
  fountains 
  are 
  inexhaustible. 
  

  

  Until 
  recently, 
  the 
  well 
  at 
  Grenelle, 
  a 
  suburb 
  of 
  Paris, 
  

   was 
  regarded 
  as 
  the 
  most 
  stupendous 
  and 
  successful 
  

   experiment 
  of 
  the 
  kind. 
  Eight 
  years 
  were 
  occupied 
  in 
  

   its 
  construction. 
  It 
  is 
  about 
  eighteen 
  hundred 
  feet 
  in 
  

   depth, 
  and 
  affords 
  about 
  half 
  a 
  million 
  of 
  gallons 
  of 
  water 
  

   in 
  twenty-four 
  hours. 
  

  

  It 
  is 
  surpassed, 
  however, 
  by 
  the 
  salt 
  well 
  at 
  Kissingen, 
  

   before 
  mentioned, 
  which 
  was 
  commenced 
  in 
  1832, 
  and 
  

   not 
  completed 
  until 
  1850. 
  Its 
  depth 
  is 
  2,325 
  feet, 
  and 
  

   the 
  cost 
  of 
  construction, 
  including 
  fixtures, 
  exceeded 
  

   thirty 
  thousand 
  dollars. 
  

  

  In 
  addition 
  to 
  those 
  already 
  mentioned, 
  the 
  most 
  con- 
  

   siderable 
  undertakings 
  of 
  the 
  kind 
  in 
  this 
  country 
  are 
  

   the 
  following: 
  Belcher's 
  Well, 
  at 
  St. 
  Louis, 
  Missouri, 
  

   which, 
  in 
  April 
  1853, 
  had 
  attained 
  the 
  depth 
  of 
  1,590 
  feet, 
  

   the 
  boring 
  being 
  still 
  prosecuted 
  day 
  and 
  night, 
  by 
  steam- 
  

   power; 
  and 
  the 
  well 
  at 
  Charleston, 
  South 
  Carolina, 
  in 
  

   which, 
  in 
  May 
  1853, 
  more 
  than 
  a 
  thousand 
  feet 
  of 
  boring 
  

   was 
  accomplished, 
  and 
  the 
  work 
  was 
  rapidly 
  progress- 
  

   ing. 
  Ultimate 
  success 
  was 
  anticipated. 
  

  

  The 
  geological 
  structure 
  of 
  a 
  considerable 
  portion 
  of 
  

   Alabama 
  and 
  Mississippi 
  also 
  is 
  favorable 
  to 
  these 
  enter- 
  

   prises. 
  

  

  In 
  the 
  former 
  State, 
  there 
  are 
  said 
  to 
  be 
  not 
  less 
  than 
  

   five 
  hundred 
  of 
  these 
  wells, 
  and 
  their 
  depth 
  rarely 
  ex- 
  

   ceeds 
  six 
  hundred 
  feet. 
  

  

  In 
  our 
  own 
  State, 
  the 
  number 
  approaches, 
  perhaps, 
  

  

  