﻿GEOLOGY. 
  265 
  

  

  stone 
  not 
  exceeding 
  a 
  foot 
  in 
  thickness, 
  the 
  water 
  rushed 
  

   up 
  to 
  within 
  eighty 
  feet 
  of 
  tlie 
  surface, 
  with 
  such 
  force 
  

   as 
  to 
  clog 
  up 
  the 
  boring, 
  which 
  had 
  not 
  been 
  tubed. 
  

  

  Near 
  the 
  same 
  place, 
  two 
  years 
  later, 
  he 
  repeated 
  the 
  

   experiment 
  with 
  the 
  same 
  result. 
  

  

  In 
  a 
  third 
  attempt, 
  an 
  imperfect 
  tubing, 
  formed 
  of 
  

   plank, 
  inserted 
  down 
  to 
  the 
  rock 
  before 
  penetrating 
  it, 
  

   enabled 
  him 
  to 
  continue 
  the 
  boring; 
  and 
  at 
  the 
  further 
  

   depths 
  of 
  fifty 
  and 
  one 
  hundred 
  feet 
  respectively, 
  other 
  

   water-bearing 
  strata 
  were 
  encountered, 
  each 
  of 
  which 
  

   afforded 
  an 
  obvious 
  increase 
  of 
  water, 
  which 
  had 
  risen 
  

   near 
  the 
  surface 
  when 
  the 
  auger 
  was 
  broken, 
  and 
  could 
  

   not 
  ])G 
  extracted. 
  

  

  In 
  1852, 
  he 
  renewed 
  his 
  experiments 
  on 
  the 
  public 
  

   square 
  in 
  Canton, 
  one 
  hundred 
  and 
  two 
  feet 
  below 
  the 
  

   level 
  of 
  his 
  former 
  attempts. 
  

  

  Allowing 
  for 
  the 
  difference 
  of 
  elevation, 
  he 
  found 
  a 
  

   general 
  correspondence 
  in 
  the 
  strata 
  penetrated. 
  A 
  

   depth 
  of 
  280 
  feet 
  was 
  attained, 
  when 
  the 
  rush 
  of 
  water 
  

   became 
  so 
  great 
  as 
  to 
  fill 
  up 
  the 
  imperfect 
  and 
  badly- 
  

   adjusted 
  tubing, 
  which 
  at 
  that 
  point, 
  by 
  an 
  untoward 
  

   accident, 
  became 
  hopelessly 
  crushed 
  and 
  deranged. 
  

  

  In 
  neither 
  of 
  these 
  borings 
  were 
  the 
  cretaceous 
  rocks 
  

   reached, 
  but 
  the 
  tertiary 
  green-sand 
  marl, 
  with 
  fossils 
  

   similar 
  to 
  those 
  found 
  at 
  Jackson, 
  I 
  understand, 
  was 
  

   penetrated. 
  

  

  The 
  process 
  of 
  boring, 
  as 
  I 
  witnessed 
  it 
  in 
  Lowndes 
  

   County, 
  is 
  easy 
  ; 
  the 
  apparatus 
  is 
  simple, 
  and 
  attended 
  

   with 
  but 
  moderate 
  expense 
  or 
  consumption 
  of 
  time. 
  

   (See 
  Plate 
  XIII.) 
  A 
  tripod, 
  formed 
  of 
  common 
  poles, 
  

   about 
  thirty 
  feet 
  high, 
  sustains 
  a 
  block 
  over 
  the 
  aperture 
  

   from 
  which 
  the 
  boring 
  rods 
  are 
  suspended, 
  and 
  which 
  

   are 
  managed 
  by 
  two 
  laborers, 
  who 
  walk 
  around 
  at 
  oppo- 
  

   site 
  ends 
  of 
  a 
  short 
  movable 
  lever, 
  connected 
  with 
  the 
  

  

  