﻿454 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  Lower 
  stone, 
  Howard's 
  quarry, 
  Ogdensburg: 
  

  

  Silica 
  ■ 
  17.28 
  

  

  Alumina 
  5 
  . 
  21 
  

  

  Ferric 
  oxid 
  .92 
  

  

  Lime 
  carbonate 
  58.17 
  

  

  Magnesia 
  carbonate 
  18.46 
  

  

  100.04 
  

   The 
  crystalline 
  limestones 
  of 
  St 
  Lawrence 
  county 
  form 
  a 
  belt 
  many 
  

   square 
  miles 
  in 
  extent 
  stretching 
  in 
  a 
  northeast 
  and 
  southwest 
  

   direction, 
  and 
  in 
  addition 
  there 
  are 
  small 
  scattered 
  patches, 
  which 
  

   are 
  irregularly 
  distributed 
  throughout 
  the 
  county. 
  According 
  to 
  

   Smyth 
  the 
  largest 
  limestone 
  belt 
  is 
  that 
  which 
  is 
  traversed 
  

   longitudinally 
  by 
  the 
  R. 
  W. 
  & 
  O. 
  R. 
  R. 
  and 
  extending 
  from 
  Ant- 
  

   werp 
  to 
  a 
  point 
  two 
  miles 
  east 
  of 
  De 
  Kalb 
  Junction. 
  While 
  it 
  

   ifi 
  thus 
  seen 
  that 
  the 
  limestone 
  undelies 
  a 
  considerable 
  area, 
  at 
  

   the 
  same 
  time 
  owing 
  to 
  a 
  scarcity 
  of 
  outcrops 
  its 
  presence 
  id 
  

   not 
  always 
  noticeable. 
  The 
  linear 
  extent 
  of 
  this 
  belt 
  from 
  Ant- 
  

   werp 
  to 
  its 
  probable 
  end 
  in 
  Canton 
  is 
  35 
  miles. 
  Its 
  width 
  in 
  a 
  

   northwest 
  and 
  southeast 
  direction 
  is 
  variable. 
  It 
  is 
  two 
  miles 
  

   at 
  Antwerp, 
  six 
  to 
  eight 
  at 
  Gouverneur, 
  but 
  then 
  narrows 
  again. 
  

   The 
  limestone 
  is 
  highly 
  crystalline 
  in 
  character, 
  and 
  varies 
  in 
  

   color 
  from 
  a 
  white 
  to 
  a 
  dark 
  bluish 
  gray. 
  It 
  is 
  unfortunately 
  

   often 
  rendered 
  impure 
  more 
  or 
  less 
  by 
  scattered 
  grains 
  or 
  some- 
  

   what 
  similar 
  masses 
  of 
  minerals 
  of 
  which 
  the 
  most 
  important 
  

   are 
  serpentine 
  and 
  tremolite. 
  In 
  some 
  localities 
  these 
  crystalline 
  

   limestones 
  reach 
  a 
  high 
  degree 
  of 
  purity. 
  The 
  following 
  two 
  

   analyses 
  were 
  kindly 
  furnished 
  me 
  by 
  Prof. 
  Priestley 
  of 
  St 
  

   Lawrence 
  university. 
  No. 
  1 
  is 
  a 
  stone 
  used 
  for 
  lime 
  from 
  a 
  

   locality 
  on 
  the 
  road 
  to 
  Colton 
  and 
  six 
  miles 
  from 
  Canton. 
  Ne. 
  2 
  

   is 
  from 
  Stevens 
  quarry 
  on 
  Grass 
  river 
  one 
  mile 
  above 
  Canton. 
  

  

  The 
  second 
  one 
  is 
  not 
  used 
  for 
  lime. 
  

  

  1 
  2 
  

  

  Silica 
  50 
  1.12 
  

  

  Iron 
  oxid 
  and 
  alumina 
  1.30 
  1.89 
  

  

  Lime 
  carbonate 
  * 
  88.67 
  76.48 
  

  

  Magnesia 
  carbonate 
  9.53 
  19.97 
  

  

  - 
  100.00 
  101.11 
  

  

  