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  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  situated 
  near 
  Conklingville, 
  8 
  miles 
  west 
  of 
  Hadley, 
  Saratoga 
  co. 
  

   Only 
  experimental 
  runs 
  have 
  been 
  made 
  thus 
  far. 
  The 
  deposit 
  

   is 
  reported 
  to 
  be 
  extensive. 
  It 
  belongs 
  to 
  the 
  sedimentary 
  type, 
  

   the 
  graphite 
  being 
  distributed 
  along 
  the 
  bedding 
  or 
  cleavage 
  

   planes 
  of 
  a 
  quartzite. 
  

  

  The 
  Empire 
  Graphite 
  Go. 
  has 
  a 
  property 
  near 
  Greenfield, 
  Sara- 
  

   toga 
  co., 
  and 
  began 
  active 
  work 
  in 
  the 
  early 
  part 
  of 
  1908. 
  

  

  In 
  St 
  Lawrence 
  county 
  some 
  attention 
  has 
  been 
  given 
  to 
  a 
  

   deposit 
  occurring 
  on 
  the 
  Indian 
  river 
  about 
  3 
  miles 
  from 
  Rossie 
  

   village. 
  The 
  graphite 
  forms 
  the 
  principal 
  constituent 
  of 
  a 
  

   schist, 
  through 
  the 
  body 
  of 
  which 
  it 
  is 
  distributed 
  richly 
  in 
  very 
  

   small 
  scaly 
  particles. 
  It 
  is 
  a 
  crystalline 
  graphite, 
  but 
  too 
  fine 
  in 
  

   size 
  to 
  be 
  easily 
  separated. 
  Trial 
  shipments 
  of 
  the 
  crude 
  material 
  

   were 
  reported 
  to 
  have 
  given 
  satisfactory 
  results 
  when 
  used 
  for 
  

   foundry 
  purposes. 
  

  

  The 
  wide 
  distribution 
  of 
  graphite 
  in 
  the 
  Adirondack 
  region 
  

   undoubtedly 
  makes 
  it 
  a 
  promising 
  field 
  for 
  prospecting 
  and 
  

   mining, 
  but 
  there.are 
  strict 
  limitations 
  surrounding 
  the 
  industry, 
  

   the 
  neglect 
  of 
  which 
  on 
  the 
  part 
  of 
  the 
  mining 
  companies 
  has 
  

   led 
  to 
  many 
  failures. 
  The 
  amount 
  of 
  capital 
  expended 
  in 
  the 
  

   erection 
  of 
  new 
  milling 
  plants 
  and 
  mine 
  equipment 
  during 
  the 
  

   last 
  five 
  years 
  aggregates 
  several 
  hundred 
  thousand 
  dollars, 
  and 
  

   in 
  many 
  cases 
  there 
  has 
  been 
  little 
  or 
  no 
  return 
  for 
  the 
  outlay. 
  

  

  The 
  separation 
  and 
  refining 
  of 
  graphite 
  under 
  the 
  conditions 
  

   presented 
  by 
  the 
  Adirondack 
  occurrences 
  involve 
  unusual 
  diffi- 
  

   culties. 
  As 
  described 
  in 
  previous 
  reports, 
  the 
  deposits 
  that 
  have 
  

   been 
  the 
  main 
  sources 
  of 
  supply 
  consist 
  of 
  disseminated 
  flakes 
  

   in 
  a 
  gangue 
  that 
  ranges 
  from 
  quartzite 
  to 
  a 
  feldspar-quartz 
  

   schist 
  with 
  a 
  considerable 
  percentage 
  of 
  dark 
  silicates. 
  While 
  

   the 
  graphite 
  has 
  a 
  specific 
  gravity 
  somewhat 
  below 
  that 
  of 
  the 
  

   accompanying 
  minerals, 
  the 
  difference 
  is 
  not 
  sufficient 
  to 
  make 
  

   a 
  separation 
  by 
  gravity 
  methods 
  alone 
  practicable, 
  and 
  in 
  fact 
  

   is 
  of 
  less 
  importance 
  than 
  the 
  scaly 
  habit 
  of 
  the 
  mineral. 
  The 
  

   first 
  separation 
  is 
  carried 
  out 
  by 
  shaking 
  tables, 
  buddies 
  or 
  by 
  

   the 
  pneumatic 
  jig, 
  and 
  the 
  product 
  secured, 
  corresponding 
  to 
  

   the 
  tailings 
  in 
  the 
  concentration 
  of 
  metallic 
  ores, 
  contains 
  a 
  cer- 
  

   tain 
  amount 
  of 
  slimes 
  or 
  dust 
  and 
  any 
  other 
  scaly 
  minerals, 
  as 
  

   well 
  as 
  the 
  graphite. 
  The 
  elimination 
  of 
  the 
  granular 
  impurities 
  

   can 
  be 
  effected 
  satisfactorily^ 
  if 
  the 
  graphite 
  is 
  relatively 
  coarse, 
  

   by 
  the 
  pneumatic 
  or 
  flotation 
  methods 
  of 
  refining, 
  but 
  scaly 
  sili- 
  

   cates 
  like 
  mica 
  are 
  not 
  readily 
  removed. 
  

  

  Biotite 
  and 
  phlogopite 
  are 
  the 
  varieties 
  of 
  mica 
  commonly 
  

  

  