﻿CLAYS 
  OF 
  NEW 
  YORK 
  755 
  

  

  uniform 
  results 
  for 
  any 
  given 
  mal^e 
  of 
  brick, 
  and 
  while 
  it 
  is 
  dis- 
  

   tinctly 
  more 
  sensitive 
  in 
  indicating 
  the 
  softer 
  grades 
  of 
  brick, 
  the 
  

   device 
  as 
  now 
  manufactured 
  embodies 
  objectionable 
  features 
  which 
  

   the 
  committee 
  think 
  can 
  be 
  remedied. 
  As 
  between 
  the 
  present 
  

   standard 
  N. 
  B. 
  M. 
  A. 
  test 
  described 
  above, 
  and 
  the 
  Talbot 
  standard 
  

   test, 
  the 
  committee 
  found 
  that 
  the 
  latter 
  is 
  much 
  more 
  sensitive 
  m 
  

   selecting 
  the 
  soft 
  brick, 
  and 
  also 
  gives 
  more 
  uniform 
  results 
  than 
  

   the 
  present 
  standard. 
  

  

  The 
  committee 
  therefore 
  recommended 
  the 
  abandoning 
  of 
  the 
  

   present 
  IST. 
  B. 
  '}!. 
  A. 
  test, 
  and 
  the 
  adopting 
  of 
  the 
  Talbot 
  standard 
  

   test, 
  .which 
  is 
  to 
  be 
  carried 
  out 
  as 
  follows: 
  

  

  1 
  All 
  brick 
  shall 
  be 
  thoroughly 
  dried 
  before 
  testing 
  in 
  the 
  rattler. 
  

  

  2 
  The 
  present 
  standard 
  rattler, 
  28 
  inches 
  in 
  diameter, 
  and 
  20 
  

   inches 
  long, 
  shall 
  be 
  retained. 
  It 
  is 
  preferably 
  made 
  of 
  steel 
  plates 
  

   in 
  place 
  of 
  east 
  iron, 
  which 
  peels 
  a^id 
  ultimately 
  breaks 
  under 
  the 
  

   wearing 
  action 
  on 
  the 
  inside. 
  The 
  rattler 
  shall 
  be 
  run 
  not 
  less 
  than 
  

   28 
  nor 
  more 
  than 
  30 
  revolutions 
  a 
  minute 
  for 
  1800 
  revolutions. 
  

  

  3 
  The 
  charge 
  to 
  be 
  placed 
  in 
  the 
  rattler 
  shall 
  consist 
  of 
  nine 
  

   paving 
  blocks 
  or 
  12 
  paving 
  bricks 
  together 
  with 
  300 
  pounds 
  of 
  

   shot 
  made 
  of 
  ordinary 
  machinery 
  cast 
  iron. 
  This 
  shot 
  shall 
  be 
  of 
  

   two 
  sizes; 
  the 
  larger 
  size 
  to 
  weigh 
  about 
  7-J 
  pounds, 
  and 
  to 
  be 
  2i^ 
  

   inches 
  square 
  and 
  4rJ 
  inches 
  long, 
  with 
  slightly 
  rounded 
  edges; 
  the 
  

   smaller 
  sizes 
  to 
  be 
  cubes, 
  1^ 
  inches 
  on 
  a 
  side, 
  with 
  rounded 
  edges. 
  

   Farther, 
  the 
  individual 
  pieces 
  of 
  cast 
  iron 
  shall 
  be 
  replaced 
  by 
  

   new 
  ones 
  when 
  they 
  have 
  lost 
  yVof 
  their 
  original 
  weight. 
  One 
  

   fourth 
  (75 
  pounds) 
  of 
  the 
  short 
  charge 
  shall 
  be 
  always 
  composed 
  of 
  

   the 
  large 
  cast 
  iron 
  blocks, 
  and 
  three 
  fourths 
  (225 
  pounds) 
  of 
  the 
  

   small 
  cast 
  iron 
  blocks. 
  

  

  New 
  York 
  paving 
  hHck 
  industry 
  

  

  Most 
  of 
  the, 
  paving 
  brick 
  manufactured 
  in 
  this 
  state 
  are 
  made 
  

   from 
  shale. 
  The 
  localities 
  are 
  as 
  follows. 
  

  

  Corning. 
  The 
  Corning 
  brick 
  and 
  terra 
  cotta 
  company 
  manu- 
  

   factures 
  a 
  paving 
  brick 
  from 
  the 
  Chemung 
  shales. 
  The 
  brick 
  are 
  

  

  