﻿218 
  

  

  Havens 
  and 
  Way— 
  Separation 
  of 
  Iron. 
  

  

  better, 
  therefore, 
  to 
  use 
  lower 
  temperatures, 
  raising 
  the 
  heat 
  for 
  

   a 
  few 
  minutes 
  when 
  the 
  action 
  is 
  apparently 
  complete 
  to 
  ensure 
  

   the 
  removal 
  of 
  the 
  last 
  traces 
  of 
  iron. 
  Tests 
  showed 
  the 
  

   residual 
  oxides 
  from 
  which 
  the 
  ferric 
  oxide 
  had 
  been 
  removed 
  

   in 
  this 
  manner 
  to 
  be 
  entirely 
  free 
  from 
  iron. 
  

  

  Exp. 
  

  

  FeaOg 
  taken. 
  

  

  CrsOa 
  taken. 
  

  

  CraOs 
  found. 
  

  

  Error. 
  

  

  

  grams. 
  

  

  grams. 
  

  

  grams. 
  

  

  grams. 
  

  

  1 
  

  

  

  

  0-]008 
  

  

  0-1008 
  

  

  0-0000 
  

  

  2 
  

  

  0-1007 
  

  

  0-1006 
  

  

  0-1006 
  

  

  0-0000 
  

  

  3 
  

  

  0-1007 
  

  

  0-1000 
  

  

  0-1002 
  

  

  + 
  0-0002 
  

  

  4 
  

  

  0-1010 
  

  

  0-1005 
  

  

  0-1003 
  

  

  -0-0002 
  

  

  5 
  

  

  0-1019 
  

  

  0-1006 
  

  

  0-1005 
  

  

  -0-0001 
  

  

  6 
  

  

  0-2007 
  

  

  0-1003 
  

  

  ZrOa 
  taken, 
  

   grams. 
  

  

  0-0999 
  

  

  ZrOo 
  found, 
  

   grams. 
  

  

  -0-0004 
  

  

  7 
  

  

  

  

  0-1516 
  

  

  0-1516 
  

  

  0-0000 
  

  

  8 
  

  

  0-1053 
  

  

  0-1010 
  

  

  0-1010 
  

  

  0-0000 
  

  

  9 
  

  

  0-1204 
  

  

  0-1519 
  

  

  0-1523 
  

  

  + 
  0-0004 
  

  

  10 
  

  

  0-1236 
  

  

  0-1516 
  

  

  0-1517 
  

  

  + 
  0-0001 
  

  

  11 
  

  

  0-2150 
  

  

  0-1517 
  

  

  BeO 
  taken, 
  

   grams. 
  

  

  0-1519 
  

  

  BeO 
  found, 
  

   grams. 
  

  

  + 
  0-0002 
  

  

  12 
  

  

  

  

  0-1309 
  

  

  0-1311 
  

  

  + 
  0-0002 
  

  

  13 
  

  

  

  

  0-1285 
  

  

  0-1285 
  

  

  0-0000 
  

  

  14 
  

  

  0-0997 
  

  

  0-0456 
  

  

  0-0457 
  

  

  + 
  0-0001 
  

  

  15 
  

  

  0-1045 
  

  

  0-1099 
  

  

  0-1099 
  

  

  0-0000 
  

  

  16 
  

  

  0-1215 
  

  

  0-1080 
  

  

  0-1081 
  

  

  + 
  0-0001 
  

  

  17 
  

  

  0-1510 
  

  

  0-1305 
  

  

  0-1290 
  

  

  -0-0015 
  

  

  18 
  

  

  0-2030 
  

  

  0-1081 
  

  

  0-1083 
  

  

  + 
  0-0002 
  

  

  The 
  separation 
  of 
  iron 
  from 
  chromium, 
  zirconium, 
  and 
  

   beryllium 
  by 
  this 
  method 
  is 
  obviously 
  complete 
  within 
  very 
  

   satisfactory 
  limits 
  of 
  error. 
  

  

  