﻿96 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  foreign 
  matter 
  to 
  be 
  suitable 
  for 
  the 
  furnace 
  without 
  undergoing 
  

   some 
  form 
  of 
  selection 
  or 
  concentration. 
  In 
  the 
  recent 
  operations 
  

   the 
  product 
  has 
  been 
  milled 
  and 
  separated 
  magnetically. 
  Peg- 
  

   matite 
  and 
  quartz 
  are 
  the 
  principal 
  foreign 
  ingredients. 
  Small 
  

   calcite 
  veins 
  with 
  a 
  deep 
  purple 
  fluorite 
  also 
  occur. 
  In 
  the 
  rich 
  

   ore 
  apatite 
  is 
  quite 
  abundant. 
  The 
  results 
  obtained 
  by 
  milling 
  

   operations 
  show 
  that 
  a 
  little 
  less 
  than 
  two 
  tons 
  of 
  crude 
  ore 
  are 
  

   required 
  for 
  one 
  of 
  concentrates. 
  By 
  the 
  method 
  of 
  magnetic 
  

   separation 
  some 
  loss 
  is 
  entailed 
  by 
  the 
  fact 
  that 
  the 
  magnetite 
  

   has 
  been 
  oxidized 
  in 
  part 
  to 
  martite, 
  which 
  has 
  the 
  chemical 
  com- 
  

   position 
  of 
  hematite 
  and 
  is 
  very 
  weakly 
  magnetic. 
  The 
  analyses- 
  

   given 
  below 
  communicated 
  by 
  the 
  Arnold 
  Mining 
  Co., 
  were 
  made 
  

   from 
  samples 
  of 
  rich 
  ore 
  (1) 
  and 
  the 
  admixed 
  lean 
  material 
  (2), 
  

   Owing 
  to 
  the 
  failure 
  to 
  determine 
  the 
  alkalis 
  present, 
  they 
  are 
  not 
  

   complete, 
  but 
  the 
  discrepancy 
  is 
  important 
  only 
  in 
  the 
  case 
  of 
  the 
  

   lean 
  ore 
  which 
  contains 
  feldspar. 
  The 
  small 
  percentages 
  of 
  copper 
  

   and 
  nickel 
  are, 
  so 
  far 
  as 
  known, 
  unusual 
  to 
  Adirondack 
  magne- 
  

   tites. 
  These 
  elements 
  are 
  probably 
  combined 
  with 
  sulfur; 
  pyrite 
  

   and 
  pyrrhotite 
  suggest 
  themselves 
  as 
  the 
  most 
  likely 
  combinations 
  

  

  in 
  which 
  they 
  may 
  occur. 
  

  

  1 
  2 
  

  

  ' 
  Fe 
  2 
  3 
  57-85 
  20.30 
  

  

  FeO 
  27.50 
  10-15 
  

  

  Si0 
  2 
  7-62 
  50.82 
  

  

  Ti0 
  2 
  39 
  -33 
  

  

  S 
  038 
  .044 
  

  

  P 
  2 
  s 
  618 
  .43 
  

  

  A1 
  2 
  3 
  1.68 
  8.32 
  

  

  MnO 
  15 
  -2o 
  

  

  CaO 
  2.48 
  2.26 
  

  

  MgO 
  1.26 
  1.55 
  

  

  Cu 
  006 
  

  

  Ni 
  • 
  .072 
  

  

  99.664 
  94.384 
  

  

  Iron 
  61.90 
  23.00 
  

  

  Phosphorus 
  . 
  269 
  . 
  188 
  

  

  Manganese 
  .116 
  .155 
  

  

  Titanium 
  24 
  .198 
  

  

  Arnold 
  mine. 
  This 
  has 
  been 
  the 
  largest 
  producer 
  of 
  all 
  and 
  for 
  

   many 
  years 
  supplied 
  the 
  entire 
  output. 
  The 
  deepest 
  workings 
  

   are 
  about 
  800 
  feet. 
  The 
  loss 
  of 
  the 
  main 
  shaft 
  by 
  caving, 
  10 
  or 
  

  

  