﻿86 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  texture 
  is 
  to 
  be 
  ascribed. 
  Occasionally 
  masses 
  of 
  very 
  large 
  fibers 
  

   in 
  closely 
  compacted 
  parallel 
  arrangement 
  are 
  met 
  with, 
  very 
  similar 
  

   in 
  appearance 
  to 
  amphibole 
  asbestos. 
  The 
  usual 
  grade, 
  however, 
  

   consists 
  of 
  a 
  belted 
  mass 
  of 
  interlacing 
  fibers, 
  seldom 
  more 
  than 
  a 
  

   fraction 
  of 
  an 
  inch 
  in 
  length, 
  and 
  sometimes 
  so 
  fine 
  as 
  to 
  resemble 
  

   massive 
  talc. 
  

  

  On 
  the 
  western 
  end 
  of 
  the 
  talc 
  belt, 
  the 
  mineral 
  is 
  quite 
  often 
  

   foliated. 
  Certain 
  mines 
  in 
  this 
  section 
  yield 
  the 
  foliated 
  variety 
  

   in 
  quantity, 
  as 
  intercalated 
  seams 
  in 
  the 
  fibrous 
  talc. 
  The 
  name 
  

   rensselaerite 
  has 
  commonly 
  been 
  applied 
  to 
  the 
  foliated 
  variety, 
  

   but 
  such 
  usage 
  is 
  not 
  warranted. 
  The 
  t3^pe 
  specimens 
  of 
  rens- 
  

   selaerite 
  collected 
  and 
  described 
  by 
  Ebenezer 
  Emmons 
  show 
  it 
  to 
  

   be 
  harder 
  than 
  talc 
  and 
  more 
  nearly 
  allied 
  to 
  serpentine 
  in 
  physical 
  

   character, 
  . 
  while 
  it 
  is 
  an 
  alteration 
  product 
  of 
  pyroxene. 
  The 
  foli- 
  

   ated 
  talc 
  is 
  white 
  with 
  often 
  a 
  greenish 
  tint 
  and 
  at 
  times 
  yields 
  

   quite 
  large 
  and 
  transparent 
  leaves, 
  resembling 
  selenite. 
  

  

  Near 
  the 
  surface 
  the 
  deposits 
  show 
  discoloration 
  from 
  iron 
  and 
  

   organic 
  matter, 
  but 
  at 
  a 
  little 
  depth 
  they 
  yield 
  material 
  which 
  when 
  

   ground 
  is 
  a 
  beautiful 
  opaque 
  white, 
  light 
  in 
  texture 
  and 
  very 
  

   uniform. 
  

  

  The 
  only 
  defect 
  in 
  the 
  talc 
  from 
  this 
  section 
  is 
  the 
  presence 
  

   oftentimes 
  of 
  a 
  certain 
  amount 
  of 
  grit 
  which 
  is 
  hard 
  to 
  eliminate 
  

   from 
  the 
  ground 
  product. 
  It 
  can 
  be 
  traced 
  to 
  fine 
  particles 
  of 
  quartz 
  

   disseminated 
  through 
  the 
  talc 
  and 
  in 
  the 
  case 
  of 
  the 
  fibrous 
  variety 
  

   also 
  to 
  the 
  existence 
  of 
  some 
  unaltered 
  tremolite. 
  Samples 
  of 
  the 
  

   prepared 
  fiber 
  when 
  examined 
  under 
  the 
  polarizing 
  microscope 
  will 
  

   commonly 
  reveal 
  a 
  little 
  of 
  the 
  original 
  tremolite. 
  The 
  proportion 
  

   of 
  grit 
  is 
  so 
  small 
  as 
  to 
  have 
  little 
  or 
  no 
  effect 
  upon 
  the 
  uses 
  of 
  

   the 
  talc 
  for 
  many 
  purposes, 
  yet 
  it 
  limits 
  the 
  market 
  to 
  some 
  extent, 
  

   and 
  efforts 
  have 
  been 
  made 
  to 
  devise 
  a 
  method 
  for 
  its 
  separation, 
  

   though 
  up 
  to 
  the 
  present 
  time 
  without 
  much 
  success. 
  

  

  Mining 
  of 
  talc. 
  The 
  mine 
  openings 
  are 
  situated 
  along 
  the 
  out- 
  

   crop 
  of 
  the 
  talc 
  beds 
  which 
  have 
  a 
  northeasterly 
  strike 
  in 
  con- 
  

   formity 
  with 
  that 
  of 
  the 
  inclosing 
  limestones. 
  With 
  the 
  exception 
  

   of 
  the 
  mines 
  owned 
  by 
  the 
  Union 
  Talc 
  Co. 
  near 
  Silvia 
  lake 
  on 
  the 
  

   southwestern 
  end 
  of 
  the 
  belt 
  they 
  lie 
  in 
  proximity 
  to 
  the 
  Oswe- 
  

   gatchie 
  river, 
  which 
  furnishes 
  most 
  of 
  the 
  power 
  used 
  in 
  the 
  talc 
  

   mills. 
  The- 
  American 
  and 
  Arnold 
  mines 
  of 
  the 
  Union 
  Talc 
  Co. 
  are 
  

   2 
  or 
  3 
  miles 
  south 
  of 
  the 
  river. 
  In 
  the 
  central 
  part 
  of 
  the 
  belt 
  near 
  

   Fullerville 
  the 
  Ontario 
  Talc 
  Co. 
  owns 
  three 
  mines. 
  The 
  eastern 
  

   portion 
  of 
  the 
  belt 
  around 
  Talcville 
  includes 
  the 
  mines 
  of 
  the 
  

  

  