﻿LIMESTONES 
  OP 
  NEW 
  YORK 
  AND 
  THEIR 
  ECONOMIC 
  VALUE 
  451 
  

  

  Large 
  quarries 
  have 
  been 
  opened, 
  and 
  the 
  crystalline 
  limestone 
  

   at 
  this 
  locality 
  close 
  to 
  the 
  railroad 
  station 
  has 
  been 
  used 
  ex- 
  

   clusively 
  for 
  road 
  making, 
  it 
  being 
  at 
  present 
  one 
  of 
  the 
  largest 
  

   producers 
  of 
  this 
  material. 
  Its 
  highly 
  siliceous 
  quality 
  makes 
  it 
  

   excellently 
  adapted 
  for 
  this 
  purpose. 
  

  

  This 
  analysis 
  shows 
  that 
  the 
  stone 
  is 
  both 
  magnesian 
  and 
  

   highly 
  siliceous. 
  The 
  following 
  analysis 
  of 
  the 
  Calciferous 
  lime- 
  

   stone 
  from 
  Miller 
  bros. 
  quarry 
  on 
  the 
  southwestern 
  edge 
  of 
  New- 
  

   burgh 
  indicates 
  the 
  rather 
  constant 
  character 
  of 
  the 
  stone*. 
  It 
  

   runs: 
  

  

  Lime 
  27.75 
  

  

  Magnesia 
  17 
  . 
  65 
  

  

  Carbonic 
  acid 
  40 
  . 
  99 
  

  

  Alumnia 
  1 
  . 
  93 
  

  

  Ferric 
  oxid 
  1 
  . 
  80 
  

  

  Silica 
  10.46 
  

  

  100.58 
  

   Newburgh. 
  The 
  Calciferous 
  is 
  exposed 
  in 
  Miller's 
  quarry 
  on 
  the 
  

   southwestern 
  edge 
  of 
  the 
  town. 
  It 
  is 
  harder 
  than 
  the 
  Tompkin's 
  

   cove 
  lime 
  and 
  like 
  the 
  latter 
  is 
  both 
  siliceous 
  and 
  magnesian. 
  It 
  

   has 
  been 
  used 
  to 
  a 
  small 
  extent 
  for 
  making 
  lime. 
  

   The 
  following 
  analysis 
  was 
  made 
  by 
  J. 
  D. 
  Irving: 
  

  

  Silica 
  . 
  10.46 
  

  

  Alumina 
  1.95 
  

  

  Ferric 
  oxid 
  , 
  . 
  1.80 
  

  

  Lime 
  27.75 
  

  

  Magnesia 
  17 
  . 
  65 
  

  

  Carbonic 
  40.46 
  

  

  100.07 
  

   Putnam 
  county 
  

  

  Two 
  quarries 
  have 
  been 
  opened, 
  the 
  one 
  near 
  Towner's, 
  the 
  

   other 
  near 
  Paterson, 
  but 
  the 
  descriptions 
  of 
  them 
  given 
  below 
  

   will 
  indicate 
  that 
  neither 
  run 
  low 
  in 
  silica. 
  

  

  The 
  quarry 
  at 
  Towner's 
  is 
  one 
  mile 
  northwest 
  of 
  the 
  N. 
  E. 
  R. 
  R. 
  

   The 
  stone 
  is 
  gray 
  and 
  white, 
  coarsely 
  crystalline 
  and 
  contains 
  

  

  