﻿ADIRONDACK 
  MAGNETIC 
  IRON 
  ORES 
  Jl 
  

  

  The 
  Cheever 
  ore 
  resembles 
  very 
  closely 
  the 
  Old 
  Bed 
  variety 
  at 
  

   Mineville. 
  It 
  is 
  not 
  quite 
  so 
  rich 
  in 
  phosphorus, 
  but 
  is 
  still 
  

   rather 
  high 
  in 
  this 
  element. 
  Mr 
  Putnam 
  for 
  the 
  Tenth 
  Census 
  

   [XV: 
  114] 
  took 
  six 
  samples, 
  four 
  underground 
  and 
  two 
  from 
  stock 
  

   piles 
  on 
  the 
  surface, 
  which 
  showed 
  the 
  following 
  percentages: 
  

  

  Iron 
  65.33 
  63.5 
  63.86 
  64.42 
  64.77 
  6 
  3-° 
  8 
  

  

  Phosphorus. 
  0.643 
  0.603 
  0.689 
  0.452 
  0.673 
  0.573 
  

  

  Titanic 
  acid 
  was 
  found 
  in 
  five 
  of 
  the 
  six, 
  but 
  its 
  amount 
  is 
  very 
  

   small. 
  The 
  ore 
  is 
  rich 
  and 
  as 
  shown 
  by 
  the 
  analyses, 
  it 
  is 
  of 
  quite 
  

   remarkable 
  uniformity. 
  Recently 
  [1907] 
  a 
  small 
  magnetic 
  mill 
  

   has 
  been 
  built 
  and 
  concentration 
  of 
  the 
  leaner 
  unused 
  ore 
  is 
  to 
  be 
  

   attempted, 
  accompanied 
  by 
  a 
  reduction 
  of 
  the 
  phosphorus. 
  

  

  Nos. 
  5 
  and 
  6. 
  These 
  two 
  pits 
  are 
  called 
  the 
  Pilfershire. 
  They 
  

   lie 
  at 
  the 
  western 
  foot 
  of 
  the 
  ridge 
  which 
  intervenes 
  between 
  

   Moriah 
  Center 
  and 
  the 
  lake. 
  Not 
  far 
  above 
  them 
  is 
  the 
  Grenville 
  

   with 
  its 
  limestones, 
  and 
  the 
  relations 
  are 
  extraordinarily 
  like 
  those 
  

   at 
  Cheever. 
  Even 
  the 
  gabbro 
  appears 
  not 
  far 
  to 
  the 
  eastward 
  as 
  

   detected 
  by 
  F. 
  L. 
  Nason, 
  who 
  has 
  called 
  the 
  writer's 
  attention 
  to 
  it. 
  

  

  The 
  southern 
  pit 
  is 
  a 
  small 
  one 
  and 
  of 
  no 
  particular 
  importance. 
  

   The 
  northern 
  pits 
  consist 
  of 
  three 
  larger 
  and 
  two 
  smaller 
  openings. 
  

   They 
  strike 
  nearly 
  north 
  and 
  south 
  and 
  dip 
  6o° 
  west, 
  passing 
  below 
  

   the 
  highway 
  50 
  feet 
  lower 
  down. 
  The 
  wall 
  rock 
  is 
  the 
  familiar 
  

   green 
  gneiss 
  which 
  in 
  thin 
  section 
  shows 
  plagioclase 
  and 
  pyroxene. 
  

   The 
  mines 
  are 
  now 
  abandoned 
  and 
  full 
  of 
  water. 
  

  

  The 
  close 
  parallelism 
  between 
  the 
  geological 
  relations 
  here 
  dis- 
  

   played 
  and 
  those 
  at 
  the 
  Cheever 
  is 
  worthy 
  of 
  emphasis. 
  In 
  both 
  

   the 
  ore 
  belt 
  strikes 
  nearly 
  north 
  and 
  south 
  and 
  dips 
  at 
  about 
  

   6o° 
  west. 
  It 
  is 
  in 
  the 
  characteristic 
  green 
  gneiss 
  of 
  almost 
  identi- 
  

   cal 
  mineralogy. 
  Just 
  above 
  are 
  the 
  Grenville 
  limestones. 
  Just 
  

   below 
  but 
  after 
  an 
  interval 
  of 
  gneiss 
  is 
  the 
  gabbro. 
  Between 
  

   the 
  two 
  stands 
  a 
  ridge 
  of 
  old 
  syenitic 
  gneisses, 
  with 
  no 
  Grenville 
  

   involved 
  and 
  extending 
  2 
  miles 
  without 
  a 
  break. 
  Undoubtedly 
  

   faulted 
  upward, 
  they 
  make 
  a 
  mountain 
  summit, 
  500 
  feet 
  above 
  

   the 
  Pilfershire 
  and 
  1000 
  feet 
  above 
  the 
  Cheever. 
  

  

  Nos. 
  7 
  through 
  11. 
  Mineville 
  group. 
  1 
  A 
  general 
  outline 
  of 
  the 
  

  

  *In 
  the 
  preparation 
  of 
  tnese 
  notes, 
  every 
  possible 
  kindness 
  has 
  been 
  

   extended 
  to 
  the 
  writer 
  by 
  Mr 
  S. 
  Norton, 
  general 
  manager 
  of 
  Witherbee, 
  Sher- 
  

   man 
  & 
  Co., 
  Mr 
  S. 
  LeFevre, 
  chief 
  engineer, 
  and 
  Mr 
  Rogers 
  Hunt, 
  assistant 
  

   engineer. 
  Mr 
  Guy 
  C. 
  Stoltz, 
  engineer 
  for 
  the 
  Port 
  Henry 
  Co., 
  has 
  been 
  

   equally 
  courteous 
  and 
  helpful 
  in 
  affording 
  data 
  and 
  advice 
  regarding 
  the 
  

   adjacent 
  properties. 
  

  

  