﻿40 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  probable 
  that 
  the 
  Ulster 
  county 
  grit 
  might 
  be 
  well 
  adapted 
  for 
  

   the 
  lining 
  of 
  pebble 
  mills, 
  an 
  application 
  which 
  has 
  not 
  been 
  

   attempted, 
  hitherto, 
  so 
  far 
  as 
  known. 
  Such 
  mills 
  are 
  employed 
  

   quite 
  extensively 
  for 
  fine 
  grinding 
  of 
  feldspar 
  and 
  other 
  hard 
  

   materials. 
  They 
  are 
  usually 
  lined 
  with 
  imported 
  French 
  rock 
  

   which 
  is 
  furnished 
  in 
  small 
  blocks 
  dressed 
  to 
  the 
  required 
  shape. 
  

   In 
  its 
  general 
  freedom 
  from 
  iron 
  or 
  other 
  coloring 
  agents, 
  the 
  

   grit 
  fulfils 
  one 
  of 
  the 
  important 
  requisites 
  for 
  such 
  material, 
  but 
  

   its 
  wearing 
  qualities 
  under 
  the 
  severe 
  conditions 
  can 
  not 
  be 
  de- 
  

   termined 
  except 
  by 
  actual 
  test. 
  

  

  The 
  production 
  of 
  millstones 
  in 
  1907 
  amounted 
  to 
  a 
  value 
  of 
  

   $21,806, 
  as 
  compared 
  with 
  $22,442 
  in 
  1906 
  and 
  $22,944 
  in 
  1905. 
  

   The 
  production 
  includes 
  also 
  the 
  blocks 
  and 
  disks 
  quarried 
  and 
  

   sold 
  for 
  roll 
  crushers. 
  At 
  one 
  time 
  the 
  output 
  of 
  Ulster 
  county 
  

   was 
  valued 
  at 
  over 
  $100,000 
  annually. 
  

  

  MINERAL 
  PAINT 
  

  

  The 
  term 
  mineral 
  paint 
  is 
  here 
  used 
  to 
  designate 
  the 
  natural 
  

   mineral 
  colors 
  obtained 
  by 
  grinding 
  an 
  ore 
  or 
  rock. 
  The 
  ma- 
  

   terials 
  suitable 
  for 
  this 
  purpose 
  that 
  are 
  found 
  in 
  New 
  York 
  

   State 
  include 
  iron 
  ore, 
  shale, 
  slate 
  and 
  ocher. 
  

  

  For 
  metallic 
  paint 
  and 
  mortar 
  colors 
  some 
  form 
  of 
  iron 
  ore, 
  

   generally 
  Hematite 
  or 
  limonite, 
  is 
  commonly 
  employed, 
  but 
  only 
  

   a 
  few 
  localities 
  are 
  known 
  where 
  the 
  ore 
  possesses 
  the 
  requisite 
  

   qualities 
  of 
  color 
  and 
  durability. 
  The 
  fossil 
  hematite 
  from 
  the 
  

   Clinton 
  formation 
  is 
  perhaps 
  most 
  widely 
  used 
  in 
  this 
  country. 
  

   The 
  mines 
  owned 
  by 
  C. 
  A. 
  Borst 
  at 
  Clinton, 
  Oneida 
  co., 
  and 
  

   those 
  of 
  the 
  Furnaceville 
  Iron 
  Co. 
  at 
  Ontario, 
  Wayne 
  co., 
  supply 
  

   much 
  of 
  the 
  crude 
  material. 
  The 
  red 
  hematite 
  mined 
  by 
  the 
  

   Rossie 
  Iron 
  Ore 
  Co. 
  at 
  Rossie, 
  St 
  Lawrence 
  co., 
  also 
  yields 
  a 
  good 
  

   metallic 
  paint. 
  

  

  Mineral 
  paint 
  made 
  from 
  shale 
  and 
  slate 
  is 
  quite 
  extensively 
  

   used 
  for 
  wooden 
  structures. 
  When 
  there 
  is 
  a 
  considerable 
  per- 
  

   centage 
  of 
  iron 
  oxids 
  present, 
  the 
  shale 
  and 
  slate 
  may 
  be 
  sold 
  for 
  

   metallic 
  paint. 
  Their 
  value 
  depends 
  largely 
  upon 
  the 
  depth 
  and 
  

   durability 
  of 
  their 
  color 
  ; 
  but 
  the 
  degree 
  of 
  natural 
  fineness 
  and 
  

   the 
  amount 
  of 
  oil 
  required 
  in 
  mixing 
  must 
  also 
  be 
  considered 
  in 
  

   determining 
  their 
  utility. 
  At 
  Randolph, 
  Cattaraugus 
  co., 
  beds 
  

   of 
  green, 
  brown 
  and 
  bluish 
  shale 
  occur 
  in 
  the 
  Chemung 
  forma- 
  

   tion. 
  They 
  are 
  worked 
  by 
  the 
  Elko 
  Paint 
  Co. 
  In 
  years 
  past 
  

   red 
  shale 
  has 
  been 
  obtained 
  in 
  Herkimer 
  county 
  from 
  the 
  Vernon 
  

  

  