﻿CLAYS 
  OF 
  Is^EW 
  YOEK 
  733 
  

  

  Magnesia 
  2.6 
  

  

  Potash 
  4.1 
  

  

  Water 
  9.7 
  

  

  100.9 
  

  

  The 
  claj 
  is 
  said 
  to 
  exist 
  in 
  large 
  quantity, 
  forming 
  a 
  thick 
  layer 
  

   at 
  this 
  point 
  in 
  the 
  alluvial 
  district 
  of 
  the 
  Drowned 
  lands, 
  and 
  "un- 
  

   derlying 
  much 
  of 
  the 
  black 
  muck 
  surface 
  of 
  this 
  district. 
  The 
  

   specimen 
  sent 
  was 
  thoroughly 
  air-dried, 
  was 
  slate 
  gray 
  in 
  color, 
  

   and 
  showed 
  a 
  little 
  fine 
  gritty 
  sand. 
  It 
  contains 
  too 
  much 
  oxid 
  of 
  

   iron 
  and 
  potash 
  for 
  a 
  refractory 
  or 
  fine 
  material. 
  Washing 
  out 
  

   the 
  fine 
  sand 
  might 
  enable 
  it 
  to 
  be 
  used 
  in 
  some 
  styles 
  of 
  paper 
  

   facing. 
  It 
  is 
  most 
  interesting 
  as 
  the 
  basis 
  of 
  a 
  valuable, 
  enduring 
  

   and 
  fertile 
  soil, 
  and 
  if 
  properly 
  drained 
  it 
  would 
  be 
  unsui'passed 
  for 
  

   tiUage 
  or 
  pasturage 
  ; 
  as 
  such, 
  it 
  furnishes 
  another 
  argument, 
  for 
  the 
  

   drainage 
  of 
  this 
  tract 
  of 
  Drowned 
  lands. 
  

  

  Long 
  Island 
  and 
  Staten 
  Island 
  yards 
  

   East 
  Williston, 
  Queens 
  co. 
  W. 
  & 
  J. 
  Post 
  have 
  two 
  yards 
  at 
  

   this 
  locality. 
  Their 
  clay 
  pit 
  is 
  in 
  a 
  field 
  some 
  600 
  feet 
  west 
  of 
  the 
  

   yard 
  on 
  the 
  land 
  of 
  H. 
  M. 
  Willis. 
  The 
  clay 
  has 
  been 
  excavated 
  to 
  

   a 
  depth 
  of 
  about 
  15 
  feet. 
  It 
  is 
  chiefly 
  a 
  bluish 
  clay 
  and 
  can 
  be 
  

   easily 
  dug. 
  The 
  clay 
  is 
  extremely 
  silicious, 
  as 
  the 
  following 
  analysis 
  

   shows, 
  but 
  the 
  percentage 
  of 
  Hme, 
  magnesia 
  and 
  iron 
  is 
  low. 
  

  

  Silica 
  69 
  . 
  73 
  

  

  Alumina 
  16 
  . 
  42 
  

  

  Peroxid 
  of 
  iron 
  2.58 
  

  

  Lime 
  1.66 
  

  

  Magnesia 
  .69 
  

  

  Alkahs 
  6.27 
  

  

  97.35 
  

  

  