﻿822 
  NEW 
  YOEK 
  STATE 
  MUSEUM 
  

  

  It 
  is 
  probable 
  that 
  the 
  washing 
  of 
  this 
  clay 
  and 
  the 
  consequent 
  

   elimination 
  of 
  the 
  grit 
  would 
  greatly 
  increase 
  its 
  refractory 
  power. 
  

  

  The 
  black 
  clay 
  which 
  underlies 
  the 
  lower 
  is 
  somewhat 
  less 
  sandy^ 
  

   running 
  thus 
  : 
  

  

  Clay 
  substance 
  and 
  silt 
  81 
  . 
  00 
  

  

  Finest 
  sand 
  3 
  . 
  30' 
  

  

  Fine 
  sand 
  16 
  . 
  20 
  

  

  100 
  . 
  50 
  

  

  Like 
  the 
  preceding, 
  it 
  is 
  not 
  a 
  highly 
  refractory 
  clay, 
  fusing 
  com- 
  

   pletely 
  at 
  cone 
  27 
  in 
  the 
  Deville 
  furnace. 
  It 
  does, 
  however, 
  bum 
  

   to 
  a 
  dense 
  body 
  of 
  cream 
  white 
  color 
  and 
  its 
  chief 
  use 
  is 
  for 
  stone- 
  

   ware. 
  There 
  is 
  apparently 
  no 
  reason 
  why 
  it 
  should 
  not 
  work 
  for 
  

   the 
  manufacture 
  of 
  white 
  or 
  very 
  light 
  buff 
  brick. 
  The 
  shrinkage 
  

   at 
  cone 
  3 
  is 
  8^, 
  and 
  at 
  cone 
  6, 
  12^, 
  at 
  which 
  temperature 
  it 
  is 
  nearly 
  

   non-absorbent, 
  and 
  begins 
  to 
  deepen 
  in 
  color. 
  

  

  The 
  following 
  is 
  an 
  analysis 
  of 
  the 
  Eaton's 
  neck 
  clay, 
  made 
  by 
  

   Dr 
  H. 
  C. 
  Bowen. 
  

  

  Silica 
  66.46 
  

  

  Alumina 
  22.33 
  

  

  Ferrous 
  oxid 
  1.38 
  

  

  Lime 
  .67 
  

  

  Magnesia 
  .07 
  

  

  Potash 
  1.52 
  

  

  Soda 
  58 
  

  

  Phosphoric 
  acid 
  .10 
  

  

  Moisture 
  .31 
  

  

  Water 
  6.21 
  

  

  99.63 
  

  

  