﻿70 
  TWENTY-FIRST 
  REPORT 
  ON 
  THE 
  STATE 
  CABINET. 
  

  

  No 
  one 
  bed 
  or 
  vein 
  probably 
  has 
  ever 
  been 
  found 
  to 
  include 
  all 
  

   the 
  mineral 
  species 
  of 
  the 
  above 
  list, 
  yet 
  the 
  composition 
  of 
  some 
  

   of 
  those 
  veinstones 
  is 
  nevertheless 
  very 
  complex, 
  as 
  may 
  be 
  seen 
  

   by 
  the 
  following 
  examples. 
  The 
  first 
  is 
  from 
  my 
  own 
  observation 
  

   of 
  the 
  vein 
  on 
  the 
  tenth 
  lot 
  of 
  the 
  fifth 
  range 
  of 
  Grenville, 
  Ontario, 
  

   which 
  cuts 
  a 
  crystalline 
  limestone 
  holding 
  scales 
  of 
  mica 
  and 
  

   graphite, 
  and 
  has 
  itself 
  been 
  mined 
  as 
  a 
  source 
  of 
  the 
  latter 
  mine- 
  

   ral. 
  The 
  minerals 
  found 
  in 
  this 
  vein 
  are 
  calcite, 
  apatite, 
  serpentine, 
  

   wollastonite, 
  pyroxene, 
  scapolite, 
  orthoclase, 
  oligoclase, 
  garnet, 
  

   idocrase, 
  zircon, 
  quartz, 
  sphene 
  and 
  graphite 
  — 
  fourteen 
  species 
  in 
  

   all. 
  A 
  still 
  larger 
  number 
  has 
  been 
  observed 
  by 
  Mr. 
  W. 
  P. 
  Blake 
  

   in 
  a 
  single 
  vein, 
  traversing 
  crystalline 
  limestone, 
  in 
  Vernon, 
  

   Sussex 
  county, 
  New 
  Jersey. 
  He 
  there 
  found 
  calcite, 
  fluor-spar, 
  

   chondrodite, 
  hornblende, 
  phlogopite, 
  margarite, 
  red 
  spinel, 
  red 
  

   corundum, 
  zircon, 
  sphene, 
  rutile, 
  ilmenite, 
  pyrites 
  and 
  graphite, 
  to 
  

   which 
  list 
  he 
  adds 
  " 
  hydrous 
  peroxyd 
  of 
  iron, 
  and 
  hydrous 
  silicates 
  

   of 
  alumina" 
  (Amer. 
  Jour. 
  Science 
  [2], 
  xiii. 
  116). 
  

  

  These 
  veinstones, 
  as 
  will 
  be 
  seen 
  from 
  numerous 
  examples 
  in 
  the 
  

   following 
  pages, 
  are 
  found 
  traversing 
  alike 
  the 
  limestones 
  and 
  

   their 
  various 
  associated 
  strata. 
  In 
  an 
  instructive 
  instance 
  in 
  the 
  

   Cheever 
  ore-bed 
  at 
  Port 
  Henry, 
  New 
  York, 
  a 
  vein 
  is 
  found 
  in 
  a 
  

   bed 
  of 
  magnetic 
  iron, 
  of 
  which 
  it 
  includes 
  angular 
  fragments. 
  

   The 
  veinstone, 
  for 
  specimens 
  of 
  which 
  I 
  am 
  indebted 
  to 
  Prof. 
  

   Hall, 
  consists 
  of 
  cleavable 
  masses 
  of 
  a 
  greenish 
  triclinic 
  feldspar, 
  

   pyramidal 
  crystals 
  of 
  quartz 
  with 
  rounded 
  angles, 
  octahedrons 
  

   of 
  magnetite, 
  a 
  substance 
  resembling 
  allanite, 
  with 
  a 
  specific 
  

   gravity 
  of 
  4.09, 
  and 
  a 
  dark 
  green 
  mineral 
  with 
  the 
  cleavage 
  of 
  

   pyroxene, 
  but 
  having 
  the 
  hardness 
  and 
  specific 
  gravity 
  (2.713) 
  

   of 
  loganite. 
  All 
  of 
  the 
  elements 
  of 
  this 
  remarkable 
  aggregate 
  

   with 
  the 
  exception 
  of 
  the 
  magnetite, 
  are 
  in 
  masses 
  of 
  an 
  inch 
  or 
  

   more 
  in 
  diameter. 
  

  

  Calcite. 
  — 
  In 
  many 
  of 
  the 
  veins 
  traversing 
  the 
  strata 
  of 
  the 
  lime- 
  

   stone 
  group, 
  calcite 
  is 
  entirely 
  wanting, 
  or 
  is 
  present 
  only 
  in 
  small 
  

   portions 
  ; 
  but 
  in 
  others 
  it 
  occurs 
  in 
  large 
  quantity, 
  and 
  so 
  far 
  pre- 
  

   dominates 
  that 
  the 
  veinstone 
  is 
  readily 
  mistaken 
  for 
  a 
  crystalline 
  

   limestone, 
  generally 
  coarse, 
  but 
  sometimes 
  very 
  fine 
  grained, 
  which 
  

   is 
  occasionally 
  white, 
  but 
  more 
  frequently 
  yellowish, 
  pink, 
  flesh 
  or 
  

   salmon 
  colored, 
  and 
  rarely 
  pale 
  blue. 
  These 
  ancient 
  calcareous 
  

   veinstones 
  are 
  sometimes 
  nearly 
  free 
  from 
  foreign 
  minerals, 
  but 
  

   more 
  frequently 
  include 
  crystals, 
  often 
  of 
  large 
  dimensions, 
  of 
  

  

  