﻿CLAYS 
  OF 
  2sEW 
  YOEK 
  

  

  559 
  

  

  The 
  silica 
  used 
  in 
  the 
  experiments 
  was 
  quartz, 
  ground 
  to 
  pass 
  

   a 
  100 
  mesh 
  sieve 
  and 
  purified 
  by 
  boiling 
  in 
  nitro-hydroehloric 
  acid. 
  

   It 
  had 
  99.88;^ 
  silica. 
  The 
  alumina 
  contained 
  98.48 
  Al.^ 
  Og. 
  

  

  The 
  method 
  followed 
  was 
  to 
  weigh 
  out 
  samples 
  of 
  1 
  gram 
  of 
  the 
  

   clay 
  to 
  be 
  tested 
  and 
  mix 
  them 
  severally 
  with 
  .1, 
  .2, 
  .3, 
  etc., 
  

   gTams 
  of 
  the 
  silica-alumina 
  mixture. 
  The 
  samples 
  were 
  then 
  tested 
  

   in 
  the 
  Deville 
  furnace. 
  

  

  The 
  following 
  table 
  gives 
  the 
  results 
  of 
  the 
  experiments 
  just 
  de- 
  

   scribed, 
  the 
  clays 
  being 
  arranged 
  in 
  the 
  order 
  of 
  their 
  refractoriness, 
  

   and 
  in 
  each 
  case 
  the 
  amount 
  of 
  flux 
  being 
  given 
  that 
  was 
  required 
  

   to 
  raise 
  the 
  fusing 
  point 
  to 
  that 
  of 
  cone 
  26 
  of 
  Soger. 
  

  

  Analyses 
  and 
  results 
  of 
  tests. 
  

  

  Sample 
  no. 
  

  

  26« 
  

  

  25« 
  

  

  3« 
  

  

  22^ 
  

  

  24« 
  

  

  23« 
  

  

  1982& 
  

  

  SiOa 
  

  

  Per 
  

  

  cent 
  

  

  64.10 
  

  

  21.79 
  

  

  6.05 
  

  

  Per 
  

  

  cent 
  

  

  55.60 
  

  

  24.34 
  

  

  6.75 
  

  

  Per 
  

  

  cent 
  

  

  57.10 
  

  

  21.29 
  

  

  6.00 
  

  

  Per 
  

  

  cent 
  

   57.45 
  

  

  21.06 
  

   5.90 
  

  

  Per 
  

  

  cent 
  

  

  57.15 
  

  

  20.26 
  

  

  5.50 
  

  

  Per 
  

  

  cent 
  

  

  49.30 
  

  

  24.00 
  

  

  9.40 
  

  

  Per 
  

   cent 
  

   43.94 
  

  

  AlA 
  

  

  lisO 
  comb. 
  . 
  . 
  

  

  11.17 
  

   3.90 
  

  

  Total 
  

  

  91.94 
  

  

  86.69 
  

  

  84.39 
  

  

  84.41 
  

  

  82.91 
  

  

  82.70 
  

  

  59.01 
  

  

  F2O3 
  

  

  CaO 
  

  

  MgO 
  

  

  K2O 
  

  

  2.51 
  

   0.10 
  

   0.58 
  

   2.62 
  

   0.03 
  

  

  6.11 
  

   0.43 
  

  

  0.77 
  

   3.00 
  

   0.09 
  

  

  7.31 
  

   0.29 
  

   1.53 
  

   3.44 
  

   0.61 
  

  

  7.54 
  

   0.29 
  

   1.22 
  

   3.27 
  

   0.39 
  

  

  7.54 
  

   0.90 
  

   1.62 
  

   3.05 
  

  

  0.58 
  

  

  8.40 
  

   0.56 
  

   1.60 
  

   3.91 
  

   0.17 
  

  

  3.81 
  

  

  11.64 
  

  

  4.17 
  

  

  2 
  90 
  

  

  ^NaaO 
  

  

  0.7 
  

  

  Total 
  

  

  5.84 
  

  

  10.40 
  

  

  13.18 
  

  

  12.71 
  

  

  13.69 
  

  

  14.63 
  

  

  23.23 
  

  

  Moisture 
  .... 
  

  

  1.10 
  

  

  2.65 
  

  

  1.30 
  

  

  1.90 
  

  

  2.70 
  

  

  1.20 
  

  

  15. 
  66« 
  

  

  Grand 
  total.. 
  

  

  98.88 
  

  

  99.74 
  

  

  98.87 
  

  

  99.02 
  

  

  99.30 
  

  

  98.54 
  

  

  98.00^ 
  

  

  Stiffening 
  in- 
  

   gredient, 
  p.c. 
  

  

  20 
  

  

  40 
  

  

  60 
  

  

  80 
  

  

  80 
  

  

  100 
  

  

  180 
  

  

  « 
  Analyzed 
  by 
  N. 
  W. 
  Lord. 
  

   c 
  Includes 
  C02- 
  

  

  ^ 
  Analyzed 
  by 
  E. 
  Orton 
  jr. 
  

   ^ 
  Includes 
  P=^05, 
  0.10^. 
  

  

  