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  GEOLOGY. 
  

  

  Twenty-five 
  feet 
  may 
  be 
  stated 
  as 
  the 
  average 
  depth 
  

   at 
  which 
  permanent 
  streams 
  are 
  attained 
  in 
  Amite, 
  

   Pike, 
  and 
  Marion 
  ; 
  and 
  on 
  the 
  flat 
  lands 
  nearer 
  the 
  sea- 
  

   board, 
  wells 
  rarely 
  exceed 
  fifteen 
  or 
  twenty 
  feet, 
  the 
  

   water 
  being 
  drawn 
  by 
  the 
  pole 
  and 
  sweep. 
  

  

  In 
  the 
  alluvial 
  lands 
  of 
  the 
  river 
  counties, 
  springs 
  are 
  

   much 
  less 
  common, 
  though 
  not 
  entirely 
  deficient, 
  and 
  

   well 
  water 
  is 
  freely 
  obtained 
  at 
  about 
  sixty 
  to 
  eighty 
  

   feet. 
  

  

  In 
  both, 
  however, 
  the 
  w^ater, 
  although 
  cold 
  and 
  limpid, 
  

   is 
  highly 
  impregnated 
  with 
  lime, 
  and 
  is 
  termed 
  hard 
  

   water, 
  as 
  unsuitable 
  for 
  washing, 
  and 
  not 
  much 
  less 
  so 
  

   for 
  culinary 
  purposes. 
  

  

  Being 
  also 
  regarded 
  to 
  some 
  extent 
  as 
  unwholesome 
  

   for 
  drinking, 
  cistern 
  water 
  has 
  come 
  into 
  very 
  general 
  

   use, 
  especially 
  in 
  towns 
  and 
  villages, 
  as 
  more 
  salubrious. 
  

  

  The 
  wells 
  at 
  the 
  University 
  of 
  Oxford 
  were 
  sixty 
  to 
  

   seventy 
  feet 
  deep, 
  and 
  afforded 
  a 
  plentiful 
  supply 
  of 
  

   good 
  water; 
  but 
  having 
  failed 
  in 
  the 
  spring 
  of 
  1852 
  

   (attributed 
  to 
  the 
  shock 
  of 
  an 
  earthquake 
  felt 
  very 
  per- 
  

   ceptibly 
  at 
  that 
  place 
  on 
  the 
  23d 
  of 
  January, 
  1852), 
  

   another 
  well 
  was 
  sunk 
  in 
  the 
  June 
  following, 
  to 
  the 
  

   depth 
  of 
  145 
  feet 
  before 
  water 
  was 
  obtained, 
  the 
  whole 
  

   distance 
  through 
  coarse 
  silicious 
  sand, 
  of 
  various 
  colors, 
  

   with 
  thin 
  strata 
  of 
  white 
  clay 
  ; 
  but 
  no 
  fossils 
  were 
  ob- 
  

   tained. 
  — 
  {Dr. 
  MiUington.) 
  

  

  Along 
  the 
  whole 
  extent 
  of 
  the 
  Yazoo 
  and 
  Talla- 
  

   hatchee 
  valleys, 
  and 
  the 
  whole 
  front 
  below, 
  on 
  the 
  Mis- 
  

   sissippi, 
  copious 
  springs 
  or 
  subterranean 
  streams 
  issue 
  

   from 
  the 
  base 
  of 
  the 
  bluffs 
  ; 
  the 
  water, 
  however, 
  flowing 
  

   from 
  beds 
  of 
  ochreous 
  earths, 
  and 
  pyritous 
  clays, 
  is 
  

   largely 
  charged 
  with 
  sulphate 
  of 
  iron, 
  and 
  its 
  habitual 
  

   use 
  is 
  highly 
  pernicious. 
  

  

  The 
  undermining 
  effects 
  of 
  these 
  streams, 
  some 
  of 
  them 
  

  

  