﻿l68 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  garnet, 
  hornblende, 
  feldspar 
  and 
  the 
  other 
  constituents 
  of 
  the 
  

   gabbro. 
  Analyses 
  by 
  W. 
  F. 
  Hillebrand, 
  quoted 
  from 
  Kemp's 
  

   article, 
  show 
  the 
  following 
  composition 
  for 
  the 
  ore 
  from 
  both 
  pits. 
  

  

  North 
  pit 
  South 
  pit 
  

  

  Fe 
  2 
  3 
  26.30 
  11. 
  16 
  

  

  FeO 
  29.78 
  28.35 
  

  

  Ti0 
  2 
  18.82 
  13.07 
  

  

  Cr 
  2 
  3 
  .75 
  -37 
  

  

  V 
  2 
  O 
  s 
  62 
  .50 
  

  

  P 
  2 
  5 
  tr. 
  .32 
  

  

  S 
  06 
  .10 
  

  

  76.33 
  53-87 
  

  

  Iron 
  41-57 
  29.87 
  

  

  PORT 
  LEYDEN 
  MINE 
  

  

  Near 
  the 
  site 
  of 
  the 
  old 
  iron 
  furnace 
  at 
  Port 
  Ley 
  den, 
  Lewis 
  co., 
  

   a 
  titaniferous 
  ore 
  body 
  exists 
  in 
  somewhat 
  remarkable 
  associations. 
  

   It 
  was 
  prospected 
  many 
  years 
  since 
  by 
  a 
  shaft 
  which 
  is 
  said 
  to 
  be 
  

   65 
  feet 
  deep 
  but 
  is 
  now 
  filled 
  with 
  water 
  almost 
  to 
  the 
  surface. 
  

   No 
  ore 
  can 
  be 
  seen 
  in 
  place 
  either 
  at 
  the 
  shaft 
  or 
  in 
  the 
  outcrops 
  

   nearby, 
  so 
  that 
  it 
  is 
  probably 
  limited 
  to 
  a 
  lens 
  or 
  shootlike 
  mass 
  

   of 
  no 
  great 
  lateral 
  dimensions. 
  In 
  the 
  volume 
  of 
  the 
  Mineral 
  

   Resources 
  for 
  1886, 
  the 
  following 
  mention 
  is 
  made 
  of 
  the 
  occurrence: 
  

   "A 
  titaniferous 
  ore 
  at 
  Port 
  Leyden 
  (Lewis 
  county) 
  occasioned 
  

   the 
  erection 
  of 
  a 
  blast 
  furnace, 
  concerning 
  which 
  Mr 
  George 
  D. 
  

   Colby 
  says 
  : 
  ' 
  With 
  a 
  view 
  of 
  ascertaining 
  the 
  amount 
  and 
  quality 
  

   of 
  the 
  ore 
  which 
  led 
  to 
  the 
  erection 
  of 
  these 
  works, 
  the 
  present 
  

   company 
  made 
  borings 
  to 
  a 
  depth 
  of 
  300 
  feet. 
  The 
  core 
  of 
  the 
  

   borings 
  indicated 
  an 
  abundance 
  of 
  ore, 
  but 
  of 
  such 
  chemical 
  com- 
  

   position 
  that 
  no 
  attempt 
  has 
  been 
  made 
  by 
  this 
  company 
  to 
  produce 
  

   pig 
  iron 
  from 
  it.' 
  " 
  

  

  An 
  analysis 
  of 
  the 
  ore, 
  quoted 
  from 
  the 
  same 
  source, 
  shows 
  the 
  

   percentages 
  below: 
  

  

  Fe 
  3 
  4 
  ;'.: 
  52.67 
  

  

  FeS 
  2 
  5.86 
  

  

  Si0 
  2 
  10.95 
  

  

  Ti0 
  2 
  9-3i 
  

  

  A1 
  2 
  3 
  5-2i 
  

  

  Mn 
  1 
  . 
  12 
  

  

  