﻿646 
  NEW 
  YOKK 
  STATE 
  MUSEUM 
  

  

  Mixed 
  colors 
  are 
  cominonly 
  produced 
  by 
  the 
  addition 
  of 
  some 
  

   metallic 
  oxid, 
  such 
  as 
  m.anganese, 
  or 
  a 
  ferruginous 
  shale, 
  to 
  a 
  

   light 
  burning 
  clay. 
  The 
  addition 
  of 
  finely 
  powdered 
  manganese 
  

   oxid 
  to 
  a 
  buff 
  burning 
  clay 
  produces 
  a 
  gray 
  color. 
  

  

  Speckled 
  bricks 
  are 
  obtained 
  by 
  adding 
  the 
  manganese 
  in 
  a 
  

   fineh^ 
  granular 
  condition. 
  

  

  Mottled 
  bricks. 
  In 
  these 
  the 
  manganese 
  is 
  added 
  in 
  larger 
  parti- 
  

   cles. 
  Ferruginous 
  shale 
  is 
  sometimes 
  employed, 
  and 
  pyrite 
  has 
  also 
  

   produced 
  the 
  same 
  appearance. 
  

  

  These 
  manganese 
  brick 
  are 
  used 
  to 
  an 
  enormous 
  extent 
  at 
  the 
  

   present 
  day. 
  On 
  account 
  of 
  their 
  mottled 
  appearance 
  and 
  rough 
  

   surface 
  they 
  are 
  considered 
  by 
  many 
  to 
  produce 
  a 
  much 
  softer 
  

   appearance 
  and 
  richer 
  color 
  than 
  the 
  plain 
  pressed 
  brick. 
  

  

  Roman 
  tile 
  or 
  Pompeian 
  brick. 
  So 
  called 
  on 
  account 
  of 
  size 
  and 
  

   shape, 
  in 
  which 
  they 
  are 
  similar 
  to 
  those 
  used 
  in 
  Roman 
  times. 
  

   Their 
  dimensions 
  are 
  12x4x1^ 
  inches. 
  They 
  are 
  made 
  either 
  plain 
  

   or 
  speckled, 
  and 
  either 
  dry 
  pressed 
  or 
  of 
  stiff 
  muds. 
  

  

  Norman 
  tile. 
  These 
  differ 
  from 
  the 
  preceding 
  simply 
  in 
  being 
  2 
  

   instead 
  of 
  li 
  inches 
  thick. 
  

  

  Ornamental 
  brick 
  include 
  all 
  those 
  of 
  irregular 
  or 
  fancy 
  shape. 
  

   Their 
  chief 
  use 
  is 
  for 
  cornices, 
  sills, 
  panels, 
  etc., 
  and 
  they 
  are 
  made 
  

   in 
  the 
  same 
  shades 
  and 
  colors 
  as 
  the 
  ordinary 
  forms 
  of 
  pressed 
  

   brick. 
  By 
  reason 
  of 
  their 
  elaborate 
  form 
  they 
  often 
  command 
  

   high 
  prices, 
  and 
  $50-$ 
  60 
  a 
  thousand 
  is 
  not 
  uncoromonly 
  de- 
  

   manded. 
  

  

  Flashed 
  brick. 
  On 
  some 
  pressed 
  brick 
  one 
  edge 
  shows 
  a 
  darkened 
  

   and 
  slightly 
  fused 
  appearance, 
  brought 
  about 
  by 
  setting 
  the 
  brick 
  

   with 
  this 
  edge 
  exposed, 
  and 
  then 
  causing 
  a 
  reducing 
  action 
  in 
  tlie 
  

   kiln 
  near 
  the 
  end 
  of 
  the 
  burning, 
  by 
  shutting 
  off 
  as 
  much 
  air 
  from 
  

   the 
  fires 
  as 
  possible. 
  

  

  The 
  number 
  of 
  ornamental 
  shapes 
  produced 
  runs 
  up 
  into 
  the 
  

   hundreds, 
  and 
  many 
  manufacturers 
  carry 
  a 
  very 
  large 
  number 
  in 
  

   stock. 
  ' 
  

  

  