﻿Watson 
  — 
  Meteoric 
  Iron 
  from 
  Paulding 
  County. 
  167 
  

  

  Cooperstown 
  Tennessee 
  irons 
  show 
  lower 
  iron 
  and 
  higher 
  

   nickel 
  than 
  the 
  Paulding 
  County, 
  Georgia, 
  iron, 
  which 
  alone 
  

   is 
  sufficient 
  to 
  distinguish 
  them. 
  

  

  A 
  separate 
  chemical 
  analysis 
  was 
  made 
  of 
  (a) 
  the 
  fresh 
  iron 
  

   and 
  (b) 
  the 
  oxidized 
  portion 
  of 
  the 
  mass 
  by 
  Mr. 
  Wm. 
  M. 
  

   Thornton, 
  Jr., 
  of 
  Yale 
  University. 
  The 
  results 
  are 
  given 
  

   below. 
  For 
  purposes 
  of 
  comparison 
  there 
  is 
  given 
  in 
  column 
  

   II 
  an 
  analysis 
  by 
  Doctor 
  H. 
  IS. 
  Stokes* 
  of 
  the 
  Canton 
  octahe- 
  

   drite 
  (coarsest) 
  from 
  Cherokee 
  County, 
  Georgia. 
  

  

  I 
  II 
  

  

  Per 
  cent 
  Per 
  cent 
  

  

  Iron 
  (Fe). 
  93-26 
  91-96 
  

  

  Nickel 
  (Ni) 
  6-34 
  6*70 
  

  

  Cobalt 
  (Co) 
  __- 
  _- 
  0-50 
  0-50 
  

  

  Copper 
  (Cu) 
  Trace 
  0-03 
  

  

  Phosphorus 
  (P) 
  0-23 
  0*11 
  

  

  Chlorine 
  (CI) 
  0-01 
  

  

  Sulphur(S) 
  None 
  0*01 
  

  

  Silicon 
  (Si) 
  _ 
  None 
  Trace 
  

  

  Carbon 
  (C) 
  _' 
  - 
  Trace? 
  

  

  100-34 
  9931 
  

  

  Specific 
  gravity 
  7*886 
  

  

  I. 
  Paulding 
  County, 
  Georgia, 
  fresh 
  iron, 
  Wm. 
  M. 
  Thornton, 
  Jr., 
  analyst. 
  

   II. 
  Cherokee 
  County 
  (Canton), 
  Georgia, 
  iron, 
  H. 
  N. 
  Stokes, 
  analyst. 
  

  

  The 
  analysis 
  shows 
  nothing 
  unusual 
  in 
  the 
  composition 
  of 
  

   the 
  Paulding 
  County 
  iron. 
  Because 
  of 
  the 
  limited 
  amount 
  of 
  

   the 
  fresh 
  iron 
  available 
  for 
  analysis, 
  no 
  search 
  was 
  made 
  for 
  

   the 
  rarer 
  elements 
  frequently 
  reported 
  in 
  minute 
  quantitj 
  7 
  in 
  

   many 
  octahedrites.f 
  

  

  In 
  the 
  preparation 
  of 
  the 
  oxidized 
  portion 
  of 
  the 
  iron 
  used 
  

   for 
  analysis? 
  all 
  coarse 
  fragments 
  were 
  sorted 
  out 
  and 
  discarded, 
  

   no 
  fragments 
  or 
  particles 
  being 
  broken 
  or 
  crushed. 
  The 
  

   remainder 
  of 
  the 
  mass 
  (143*8 
  grams) 
  was 
  thrown 
  on 
  a 
  sieve 
  of 
  

   20 
  meshes 
  to 
  the 
  linear 
  inch. 
  Out 
  of 
  the 
  143*8 
  grams, 
  32 
  

   grams 
  passed 
  through 
  which 
  still 
  contained 
  small 
  cores 
  of 
  

   metallic 
  iron. 
  It 
  was 
  therefore 
  quartered 
  and 
  the 
  portion 
  thus 
  

   obtained 
  gently 
  ground 
  in 
  an 
  agate 
  mortar 
  and 
  passed 
  through 
  

   silk 
  bolting 
  cloth 
  of 
  about 
  100 
  meshes 
  to 
  the 
  linear 
  inch. 
  This 
  

   process 
  was 
  repeated 
  upon 
  the 
  residue 
  until 
  practically 
  no 
  

   powder 
  passed 
  through 
  the 
  sieve. 
  The 
  sifted 
  portions, 
  after 
  

   being 
  mixed 
  together, 
  made 
  up 
  the 
  sample 
  for 
  chemical 
  

   analysis. 
  

  

  * 
  Howell, 
  E. 
  E., 
  this 
  Journal, 
  vol. 
  1, 
  p. 
  252, 
  1905. 
  

  

  f 
  Merrill, 
  Geo. 
  P. 
  : 
  Minor 
  Constituents 
  of 
  Meteorites, 
  this 
  Journal, 
  vol. 
  

   xxxv, 
  pp. 
  509-525, 
  1913. 
  

  

  