﻿848 
  NEW 
  YORK 
  STATE 
  'j^niSEUM 
  

  

  Mineral 
  paint 
  

  

  By 
  this 
  term 
  is 
  meant 
  a 
  paint 
  obtained 
  by 
  taking 
  some 
  eartby 
  

   mineral 
  or 
  rock, 
  wbich 
  bas 
  tbe 
  desired 
  color, 
  grinding 
  it 
  to 
  a 
  fine 
  

   powder 
  if 
  it 
  is 
  not 
  already 
  in 
  tbat 
  condition, 
  and 
  tben 
  mixing 
  it 
  

   with 
  oil. 
  

  

  One 
  of 
  tbe 
  commonest 
  forms 
  of 
  mineral 
  paint 
  is 
  tbe 
  well-known 
  

   ocber 
  wbicb 
  is 
  simply 
  a 
  fine-grained 
  f 
  errnginons 
  clay, 
  of 
  tbe 
  proper 
  

   color. 
  Common 
  ocber 
  is 
  not 
  quarried 
  in 
  tbis 
  state, 
  but 
  a 
  variety 
  of 
  

   ocber 
  kno^vn 
  as 
  sienna 
  is 
  found, 
  forming 
  a 
  tbin 
  bed 
  in 
  tbe 
  glacial 
  

   drift 
  soutb 
  of 
  Wbiteball, 
  and 
  bas 
  been 
  worked 
  for 
  a 
  number 
  of 
  

   years. 
  

  

  In 
  tbe 
  soutbem 
  part 
  of 
  tbe 
  state 
  near 
  E-andolpb 
  tbere 
  occurs 
  a 
  

   series 
  of 
  sbale 
  beds 
  wbicb 
  exbibit 
  green, 
  brown, 
  bluisb 
  and 
  olive 
  

   colors, 
  depending 
  on 
  tbe 
  amount 
  of 
  iron 
  oxid 
  wbicb 
  tbey 
  contain 
  

   and 
  its 
  condition 
  of 
  oxidation. 
  Tbese 
  are 
  worked 
  by 
  tbe 
  Elko 
  

   mining 
  and 
  milling 
  co., 
  and 
  ground 
  for 
  mineral 
  paint. 
  

  

  Mineral 
  paints 
  made 
  from 
  clays 
  a;nd 
  sbales 
  form 
  a 
  cbeap 
  and 
  

   satisfactory 
  form 
  of 
  color 
  application 
  for 
  wooden 
  surfaces. 
  Tbe 
  

   value 
  of 
  tbe 
  material 
  depends 
  to 
  a 
  large 
  extent 
  on 
  tbe 
  sbade 
  of 
  tbe 
  

   color, 
  tbe 
  amount 
  of 
  fineness 
  wbicb 
  it 
  naturally 
  possesses 
  and 
  tbe 
  

   percentage 
  of 
  oil 
  wbicb 
  bas 
  to 
  be 
  mixed 
  witb 
  it 
  in 
  order 
  to 
  give 
  a 
  

   mixture 
  of 
  tbe 
  proper 
  consistency. 
  

  

  Clarifying 
  oils 
  and 
  fulling 
  earth 
  

  

  Under 
  tbis 
  bead 
  is 
  included 
  tbe 
  material 
  known 
  as 
  fullers' 
  eartb. 
  

   Properly 
  speaking, 
  fullers' 
  eartb 
  is 
  not 
  a 
  clay, 
  because 
  it 
  lacks 
  plas- 
  

   ticity, 
  but 
  some 
  of 
  tbe 
  material 
  wbicb 
  is 
  put 
  on 
  tbe 
  market 
  under 
  

   tbis 
  name 
  and 
  does 
  tbe 
  work 
  required 
  of 
  it 
  as 
  well 
  as 
  true 
  fullers^ 
  

   eartb 
  is 
  ordinary 
  plastic 
  clay. 
  

  

  pullers' 
  earth 
  

   Properties 
  and 
  uses. 
  Fullers' 
  eartb 
  is 
  one 
  of 
  tbe 
  most 
  interest- 
  

   ing 
  materials 
  witb 
  wbicb 
  tbe 
  economic 
  geologist 
  bas 
  to 
  deal. 
  In 
  

   appearance 
  it 
  resembles 
  clay, 
  in 
  properties 
  it 
  differs 
  from 
  it 
  very 
  

   considerably, 
  in 
  tbat 
  it 
  usually 
  lacks 
  plasticity, 
  and 
  also 
  bas 
  tbe 
  

  

  I 
  

  

  