﻿122 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  jjlt 
  is 
  apparent 
  that 
  the 
  percentage 
  of 
  free 
  silica 
  in 
  the 
  form 
  of 
  

   quartz 
  must 
  be 
  small. 
  The 
  relative 
  proportions 
  of 
  the 
  chem- 
  

   ical 
  constituents 
  agree 
  quite 
  closely 
  with 
  those 
  found 
  in 
  many 
  

   syenites. 
  

  

  ^jParkhurst 
  mine. 
  This 
  mine 
  has 
  been 
  opened 
  on 
  the 
  north- 
  

   eastern 
  part 
  of 
  the 
  ore 
  belt. 
  The 
  shaft 
  is 
  about 
  2 
  miles 
  from 
  Lyon 
  

   Mountain 
  station. 
  Within 
  a 
  short 
  distance 
  north 
  of 
  the 
  Williams 
  

   mine 
  the 
  outcrop 
  of 
  the 
  deposits 
  passes 
  beneath 
  drift 
  and 
  is 
  nowhere 
  

   exposed 
  over 
  the 
  northern 
  section. 
  There 
  is 
  no 
  interruption 
  in 
  the 
  

   lines 
  of 
  magnetic 
  attraction, 
  however, 
  so 
  that 
  it 
  seems 
  safe 
  to 
  

   assume 
  that 
  the 
  ore 
  continues 
  unbroken 
  in 
  the 
  interval 
  which 
  is 
  

   something 
  over 
  a 
  mile. 
  

  

  The 
  shaft 
  has 
  been 
  put 
  down 
  on 
  the 
  slope 
  of 
  a 
  small 
  hill 
  at 
  a 
  

   point 
  a 
  few 
  hundred 
  feet 
  east 
  of 
  the 
  railroad 
  and 
  perhaps 
  a 
  hundred 
  

   feet 
  above 
  it. 
  The 
  shaft 
  was 
  located 
  with 
  a 
  view 
  to 
  striking 
  ore 
  near 
  

   the 
  outcrop, 
  the 
  line 
  of 
  which 
  had 
  been 
  previously 
  approximated 
  

   by 
  magnetic 
  determinations. 
  The 
  first 
  work 
  on 
  the 
  shaft 
  was 
  

   done 
  over 
  20 
  years 
  ago. 
  After 
  passing 
  through 
  70 
  feet 
  of 
  drift, 
  

   rock 
  was 
  encountered 
  and 
  sinking 
  was 
  discontinued 
  for 
  a 
  time. 
  

   Later 
  on 
  a 
  drill 
  hole 
  which 
  had 
  been 
  put 
  down 
  in 
  the 
  bottom 
  of 
  the 
  

   shaft 
  showed 
  ore 
  at 
  a 
  depth 
  of 
  145 
  feet 
  from 
  the 
  surface 
  with 
  an 
  

   apparent 
  thickness 
  of 
  48 
  feet 
  and 
  an 
  average 
  iron 
  content 
  of 
  40.41 
  

   per 
  cent. 
  The 
  shaft 
  was 
  then 
  sunk 
  to 
  the 
  ore 
  and 
  mining 
  begun. 
  

   In 
  the 
  period 
  of 
  operations 
  from 
  1889 
  to 
  1892 
  inclusive 
  the 
  output 
  

   according 
  to 
  company 
  records 
  amounted 
  to 
  about 
  40,000 
  tons, 
  of 
  

   which 
  37,500 
  tons 
  was 
  classed 
  as 
  furnace 
  ore 
  and 
  was 
  smelted 
  

   without 
  concentration 
  in 
  the 
  furnace 
  at 
  Standish. 
  

  

  The 
  shaft 
  is 
  now 
  partially 
  filled 
  with 
  water, 
  preventing 
  access 
  

   to 
  the 
  underground 
  workings. 
  The 
  character 
  of 
  the 
  rock 
  dumps 
  

   about 
  the 
  shaft 
  indicate 
  that 
  the 
  walls 
  are 
  made 
  up 
  of 
  a 
  schist 
  

   similar 
  to 
  that 
  at 
  the 
  Williams 
  mine. 
  There 
  is 
  much 
  pegmatite 
  in 
  

   both 
  ore 
  and 
  country 
  rock 
  and 
  the 
  existence 
  of 
  one 
  or 
  more 
  diabase 
  

   dikes 
  is 
  inferred. 
  

  

  The 
  magnetite 
  has 
  a 
  granular 
  texture, 
  coarser 
  than 
  the 
  average 
  

   of 
  the 
  ore 
  found 
  in 
  the 
  workings 
  farther 
  south, 
  and 
  is 
  intermixed 
  

   with 
  a 
  gangue 
  consisting 
  mainly 
  of 
  quartz 
  and 
  feldspar. 
  It 
  con- 
  

   tains 
  apatite 
  in 
  crystals 
  and 
  grains 
  of 
  macroscopic 
  size, 
  indicating 
  

   a 
  fairly 
  high 
  phosphorus 
  content. 
  According 
  to 
  analyses 
  that 
  were 
  

   made 
  during 
  the 
  period 
  of 
  operations, 
  the 
  ore 
  shipped 
  to 
  the 
  Standish 
  

   furnace 
  averaged 
  49.73 
  P 
  er 
  cerrt 
  i 
  ron 
  an 
  d 
  about 
  .1 
  per 
  cent 
  phos- 
  

   phorus. 
  The 
  following 
  two 
  analyses 
  furnish 
  additional 
  particulars 
  

   as 
  to 
  the 
  character 
  of 
  the 
  ore. 
  

  

  