﻿74 
  TWENTY-FIRST 
  REPORT 
  ON 
  THE 
  STATE 
  CABINET, 
  

  

  olive-green, 
  passing 
  into 
  wax-yellow, 
  imbedded 
  with 
  purple 
  fluor, 
  

   in 
  carbonate 
  of 
  lime. 
  

  

  The 
  crystals 
  of 
  apatite 
  from 
  these 
  veinstones 
  sometimes 
  include 
  

   rounded 
  crystals 
  of 
  quartz, 
  or 
  of 
  carbonate 
  of 
  lime, 
  and 
  on 
  the 
  

   contrary 
  are 
  sometimes 
  themselves 
  imbedded, 
  not 
  only 
  in 
  carbon- 
  

   ate 
  of 
  lime 
  and 
  dolomite, 
  but 
  in 
  massive 
  apatite, 
  in 
  quartz, 
  in 
  

   mica, 
  or 
  iron 
  pyrites, 
  in 
  foliated 
  graphite, 
  and 
  probably 
  in 
  other 
  

   minerals. 
  In 
  one 
  case, 
  a 
  crystal 
  of 
  apatite 
  one-fourth 
  of 
  an 
  inch 
  

   in 
  diameter 
  and 
  two 
  inches 
  long, 
  was 
  found 
  imbedded 
  in 
  a 
  large 
  

   crystal 
  of 
  mica, 
  one 
  end 
  only 
  projecting 
  from 
  the 
  side 
  of 
  the 
  

   mica 
  prism, 
  with 
  which 
  the 
  prism 
  of 
  apatite 
  was 
  at 
  right 
  angles. 
  

   In 
  Eoss, 
  crystalline 
  grains 
  of 
  yellow 
  apatite 
  are 
  imbedded 
  in 
  octa- 
  

   hedrons 
  of 
  black 
  spinel. 
  As 
  already 
  stated, 
  prisms 
  of 
  apatite, 
  

   often 
  of 
  large 
  dimensions, 
  line 
  drusy 
  cavities 
  in 
  the 
  veins 
  of 
  

   massive 
  apatite, 
  or 
  of 
  mingled 
  apatite 
  and 
  pyroxene. 
  In 
  the 
  

   latter 
  case, 
  large 
  crystals 
  of 
  the 
  two 
  species 
  are 
  sometimes 
  found 
  

   grouped 
  together 
  like 
  those 
  from 
  Snartim, 
  in 
  Norway. 
  In 
  the 
  

   specimens 
  from 
  the 
  latter 
  locality, 
  however, 
  unlike 
  those 
  from 
  

   Burgess, 
  the 
  apatite 
  prisms 
  preserve 
  their 
  sharpness 
  of 
  outline, 
  

   and, 
  as 
  well 
  as 
  the 
  accompanying 
  pyroxene, 
  are 
  partially 
  incrusted 
  

   with 
  quartz 
  crystals. 
  

  

  Apatite 
  occurs 
  in 
  the 
  veins 
  in 
  Burgess 
  incrusted 
  with 
  crystals 
  

   of 
  quartz, 
  sometimes, 
  smoky, 
  ferruginous, 
  or 
  amethystine, 
  and 
  at 
  

   Ticonderoga, 
  New 
  York, 
  crystals 
  of 
  apatite 
  are 
  imbedded 
  in 
  

   massive 
  vitreous 
  quartz. 
  The 
  radiated 
  and 
  botryoiclal 
  apatite, 
  

   named 
  eupyrchroite 
  by 
  Emmons, 
  is 
  worthy 
  of 
  notice 
  as 
  a 
  peculiar 
  

   form 
  of 
  the 
  mineral 
  ; 
  it 
  occurs 
  with 
  quartz, 
  brown 
  tourmaline 
  and 
  

   allanite, 
  filling 
  a 
  vein 
  at 
  Ticonderoga. 
  The 
  mineral 
  from 
  North 
  

   Burgess, 
  as 
  shown 
  in 
  the 
  Geology 
  of 
  Canada, 
  belongs 
  to 
  the 
  

   variety 
  fluor-apatite, 
  the 
  analysis 
  of 
  a 
  pure 
  massive 
  specimen 
  hav- 
  

   ing 
  given 
  me 
  phosphate 
  of 
  lime 
  91.20, 
  fluorid 
  of 
  calcium 
  7.60, 
  

   chlorid 
  of 
  calcium 
  0.78, 
  insoluble 
  0.90 
  = 
  100.48. 
  

  

  Apatite 
  as 
  abed-mineral 
  is 
  very 
  frequent, 
  both 
  in 
  the 
  limestones 
  

   of 
  the 
  Laurentian 
  system 
  and 
  their 
  associated 
  rocks. 
  Small 
  crys- 
  

   tals 
  of 
  it 
  are 
  often 
  disseminated 
  through 
  the 
  limestone 
  beds, 
  gen- 
  

   erally 
  in 
  very 
  small 
  proportion, 
  but 
  in 
  some 
  cases 
  rising 
  to 
  two 
  

   or 
  three 
  per 
  cent, 
  or 
  even 
  a 
  much 
  larger 
  amount, 
  though 
  still 
  

   in 
  the 
  form 
  of 
  grains 
  or 
  small 
  crystals, 
  often 
  with 
  pyroxene. 
  

   These 
  larger 
  proportions 
  of 
  apatite 
  appear 
  to 
  characterize 
  certain 
  

   beds 
  or 
  bands 
  in 
  the 
  limestone. 
  

  

  Apatite 
  also 
  occurs 
  disseminated 
  in 
  grains 
  or 
  small 
  masses, 
  

  

  