﻿106 
  Derby 
  — 
  Constituents 
  of 
  the 
  Canon 
  Diablo 
  Meteorite. 
  

  

  schreibersite, 
  separated 
  with 
  the 
  magnet 
  from 
  the 
  carbon. 
  

  

  which 
  was 
  determined 
  by 
  burning 
  in 
  

   and 
  weighing 
  as 
  carbonic 
  acid. 
  

  

  a 
  stream 
  of 
  hydrogen 
  

  

  I. 
  

   Fe 
  92-88 
  

  

  Ni 
  and 
  Co 
  _ 
  1-33 
  

  

  P 
  _ 
  0-48 
  

  

  C._. 
  _ 
  5-33 
  

  

  100-02 
  

  

  II. 
  

  

  91-67 
  

  

  2-43 
  

  

  0-09 
  

  

  6-07 
  

  

  100-28 
  

  

  The 
  phosphorus 
  is 
  undoubtedly 
  due 
  to 
  a 
  slight 
  action 
  of 
  the 
  

   solvent 
  on 
  the 
  schreibersite, 
  which 
  as 
  already 
  remarked 
  is 
  not 
  

   wholly 
  insoluble 
  in 
  copper-ammonium 
  chloride. 
  This 
  result 
  

   agrees 
  very 
  well 
  with 
  the 
  analyses 
  of 
  cohenite 
  given 
  by 
  Wein- 
  

   schenk 
  and 
  Cohen 
  and 
  with 
  an 
  unpublished 
  analysis 
  of 
  that 
  of 
  

   Bendego 
  by 
  Dafert. 
  In 
  appearance 
  the 
  cohenite 
  grains 
  agree 
  

   with 
  those 
  of 
  Bendego 
  although 
  they 
  are 
  richer 
  in 
  inclusions 
  

   of 
  tabular 
  schreibersite. 
  Owing 
  to 
  the 
  general 
  distortion 
  of 
  

   the 
  crystals 
  and 
  the 
  rounded 
  character 
  of 
  the 
  faces, 
  no 
  measure- 
  

   ments 
  could 
  be 
  made, 
  but 
  the 
  forms 
  are 
  undoubtedly 
  identical 
  

   with 
  those 
  of 
  Bendego, 
  on 
  which 
  Hussak 
  succeeded 
  in 
  demon- 
  

   strating 
  that 
  they 
  belong 
  to 
  the 
  cubic 
  system. 
  

  

  Three 
  distinct 
  forms 
  of 
  iron 
  and 
  nickel 
  phosphide 
  occur 
  

   which 
  although 
  differing 
  greatly 
  in 
  appearance 
  and 
  somewhat 
  

   also 
  in 
  chemical 
  composition, 
  are 
  probably 
  different 
  phases 
  of 
  

   a 
  single 
  mineral 
  species. 
  The 
  most 
  abundant 
  individually 
  are 
  

   the 
  acicular 
  forms 
  known 
  as 
  rhabdite, 
  though, 
  owing 
  to 
  their 
  

   minute 
  size, 
  they 
  do 
  not 
  equal 
  in 
  weight 
  the 
  granular 
  and 
  

  

  tabular 
  forms 
  known 
  as 
  schreibersite. 
  Both 
  are 
  generally 
  dis- 
  

   tributed 
  throughout 
  the 
  mass, 
  the 
  schreibersite 
  form 
  being 
  par- 
  

   ticularly 
  abundant, 
  included 
  in, 
  or 
  adherent 
  to, 
  the 
  surface 
  of 
  the 
  

   cohenite 
  grains, 
  while 
  the 
  rhabdite 
  needles 
  are 
  especially 
  con- 
  

   centrated 
  in 
  the 
  less 
  soluble 
  metallic 
  portions 
  and 
  in 
  the 
  

  

  