﻿120 
  

  

  new 
  york 
  State 
  museum 
  

  

  indicated 
  northern 
  extremity 
  of 
  the 
  Phillips 
  vein. 
  If 
  the 
  presence 
  

   of 
  a 
  fault 
  is 
  assumed 
  to 
  account 
  for 
  the 
  relations 
  of 
  the 
  latter 
  to 
  the 
  

   main 
  zone, 
  the 
  line 
  would 
  coincide 
  with 
  the 
  probable 
  direction 
  of 
  

   displacement 
  so 
  that 
  the 
  drill 
  hole 
  actually 
  may 
  be 
  considerably 
  

   above 
  the 
  horizon 
  of 
  the 
  ore 
  bodies. 
  

  

  The 
  Phillips 
  vein 
  has 
  been 
  tested 
  by 
  two 
  drill 
  holes. 
  Two 
  

   parallel 
  bodies 
  of 
  ore 
  have 
  been 
  found 
  with 
  a 
  thickness 
  of 
  50 
  feet. 
  

   The 
  dip 
  is 
  8o° 
  northwest. 
  

  

  Chemical 
  analyses. 
  There 
  is 
  a 
  wide 
  range 
  in 
  the 
  mineral 
  com- 
  

   position 
  of 
  the 
  ore 
  and 
  consequently 
  in 
  the 
  chemical 
  composition. 
  

   Some 
  portions 
  of 
  the 
  deposits 
  have 
  only 
  small 
  amounts 
  of 
  admixed 
  

   gangue 
  minerals 
  so 
  that 
  the 
  iron 
  content 
  may 
  run 
  as 
  high 
  as 
  50 
  per 
  

   cent 
  or 
  even 
  more. 
  The 
  quantity 
  of 
  such 
  ore 
  mined, 
  however, 
  is 
  

   not 
  large 
  when 
  compared 
  with 
  the 
  total 
  output. 
  On 
  an 
  average 
  

   the 
  iron 
  runs 
  between 
  the 
  approximate 
  limits 
  of 
  30 
  and 
  35 
  per 
  

   cent. 
  

  

  The 
  analyses 
  below 
  furnish 
  the 
  essential 
  details 
  as 
  to 
  the 
  chemi- 
  

   cal 
  composition 
  of 
  the 
  crude 
  ore 
  and 
  of 
  the 
  concentrates 
  made 
  by 
  

   magnetic 
  separation 
  as 
  now 
  practised. 
  No. 
  1 
  represents 
  a 
  sample 
  

   of 
  relatively 
  rich 
  ore, 
  such 
  as 
  was 
  formerly 
  shipped 
  without 
  con- 
  

   centration. 
  No. 
  2 
  is 
  an 
  average 
  of 
  concentrating 
  ore, 
  and 
  Nos. 
  

   3 
  and 
  4 
  of 
  concentrates. 
  For 
  analyses 
  Nos. 
  2 
  and 
  3 
  the 
  writer 
  is 
  

   indebted 
  to 
  Mr 
  James 
  Brakes, 
  chemist 
  at 
  the 
  mines. 
  Analysis 
  

   No. 
  1 
  is 
  quoted 
  from 
  an 
  article 
  by 
  James 
  M. 
  Swank 
  published 
  in 
  

   the 
  volume 
  of 
  the 
  " 
  Mineral 
  Resources 
  " 
  for 
  1883 
  and 
  1! 
  

  

  Fe 
  2 
  3 
  47-38 
  31.48 
  

  

  FeO 
  21. 
  32 
  15. 
  81 
  

  

  FeO 
  (gangue) 
  2 
  . 
  83 
  

  

  Si0 
  2 
  20.89 
  33- 
  16 
  

  

  Ti0 
  2 
  427 
  

  

  S 
  .084 
  .027 
  

  

  P 
  2 
  5 
  057 
  .043 
  

  

  A1 
  2 
  3 
  4.02 
  4-90 
  

  

  MnO 
  „ 
  21 
  .115 
  

  

  CaO 
  3 
  . 
  72 
  4 
  .96 
  

  

  MgO 
  2. 
  11 
  2. 
  10 
  

  

  K 
  2 
  1.438 
  

  

  Na 
  2 
  2.283 
  

  

  H 
  2 
  25 
  

  

  60. 
  128 
  

  

  63 
  

  

  062 
  

  

  28.850 
  

  

  28 
  

  

  996 
  

  

  • 
  257 
  

   6.880 
  

  

  

  

  4 
  

  

  740 
  

  

  • 
  417 
  

  

  

  

  .022 
  

  

  

  031 
  

  

  .023 
  

  

  

  012 
  

  

  .900 
  

  

  

  339 
  

  

  . 
  107 
  

  

  

  !34 
  

  

  .660 
  

  

  

  740 
  

  

  • 
  405 
  

  

  

  434 
  

  

  •494 
  

  

  •777 
  

   .040 
  

  

  

  

  

  

  

  

  

  99.791 
  99.823 
  99.960 
  98.488 
  

  

  