﻿168 
  Watson 
  — 
  Meteoric 
  Iron 
  from 
  Paulding 
  County. 
  

  

  Of 
  the 
  32 
  grams 
  which 
  passed 
  through 
  the 
  20-mesh 
  

   sieve, 
  25*9 
  grams 
  were 
  strongly 
  magnetic 
  ; 
  the 
  residue 
  (6*1 
  

   grams) 
  was 
  essentially 
  nonmagnetic. 
  Of 
  the 
  111*8 
  grams 
  that 
  

   did 
  not 
  pass 
  the 
  20-mesh 
  sieve, 
  109 
  grams 
  were 
  strongly 
  mag- 
  

   netic, 
  2*8 
  grams 
  being 
  nonmagnetic 
  or 
  essentially 
  so. 
  

  

  The 
  analysis 
  by 
  Mr. 
  Thornton 
  of 
  the 
  above 
  sample 
  of 
  

   the 
  oxidized 
  iron 
  is 
  as 
  follows 
  : 
  

  

  Analysis 
  of 
  oxidized 
  portion 
  of 
  Paulding 
  County, 
  Georgia, 
  iron. 
  

  

  (Wm. 
  M. 
  Thornton, 
  Jr., 
  analyst.) 
  

  

  Per 
  cent 
  

  

  Fe. 
  2 
  3 
  36-12 
  

  

  FeO 
  41-26 
  

  

  NiO 
  6-57 
  

  

  CoO 
  __ 
  0-48 
  

  

  CuO 
  Trace 
  

  

  Si0 
  2 
  0-26 
  

  

  PA- 
  - 
  0-48 
  

  

  CI 
  2-21 
  

  

  H 
  2 
  (at 
  110° 
  O.) 
  2-77 
  

  

  H 
  2 
  0(above 
  110° 
  C.) 
  9-23 
  

  

  99-38 
  

  

  A 
  most 
  extraordinary 
  feature 
  of 
  this 
  analysis 
  which 
  the 
  

   writer 
  cannot 
  explain 
  is 
  the 
  Yery 
  abnormally 
  high 
  chlorine 
  

   content. 
  So 
  far 
  as 
  the 
  writer 
  has 
  been 
  able 
  to 
  ascertain 
  from 
  

   an 
  examination 
  of 
  many 
  hundreds 
  of 
  analyses 
  of 
  meteoric 
  

   irons 
  from 
  all 
  parts 
  of 
  the 
  world, 
  it 
  is 
  enormously 
  excessive, 
  

   being 
  many 
  times 
  greater 
  than 
  for 
  any 
  published 
  analysis. 
  In 
  

   light 
  of 
  this 
  fact 
  the 
  analyst, 
  Mr. 
  Thornton, 
  at 
  the 
  request 
  of 
  

   the 
  writer, 
  redetermined 
  the 
  chlorine 
  in 
  a 
  second 
  portion 
  of 
  

   the 
  oxidized 
  iron 
  with 
  the 
  following 
  result 
  : 
  

  

  Per 
  cent 
  

  

  H 
  a 
  Oatll0°C. 
  3-34 
  

  

  Chlorine 
  (CI) 
  _ 
  1*99 
  

  

  When 
  these 
  results 
  are 
  compared 
  with 
  the 
  same 
  constituents 
  

   in 
  the 
  analysis 
  above, 
  it 
  will 
  be 
  observed 
  that 
  a 
  difference 
  

   is 
  shown, 
  but 
  on 
  recalculating 
  the 
  two 
  chlorine 
  determin- 
  

   ations 
  to 
  the 
  same 
  (moisture 
  free) 
  basis 
  the 
  figures 
  are 
  in 
  fairly 
  

   close 
  agreement. 
  

  

  Concerning 
  these 
  results, 
  Mr. 
  Thornton 
  in 
  a 
  recent 
  personal 
  

   communication 
  to 
  the 
  writer 
  says 
  : 
  " 
  The 
  material 
  is 
  hygro- 
  

   scopic 
  and 
  the 
  moisture 
  content 
  very 
  variable 
  ; 
  . 
  . 
  . 
  I 
  think 
  

   it 
  improbable 
  that 
  my 
  first 
  determination 
  of 
  chlorine 
  (see 
  

   above) 
  in 
  the 
  first 
  drawn 
  sample 
  is 
  too 
  high." 
  

  

  Brooks 
  Museum, 
  University 
  of 
  Virginia. 
  

  

  