﻿Derby 
  — 
  Constituents 
  of 
  the 
  Canon 
  Diablo 
  Meteorite. 
  109 
  

  

  In 
  the 
  following 
  analysis 
  this 
  coaly 
  residue 
  was 
  treated 
  with 
  

   strong 
  nitric 
  acid 
  for 
  a 
  few 
  minutes 
  until 
  the 
  black 
  color 
  dis- 
  

   appeared 
  and 
  an 
  attempt 
  was 
  made 
  to 
  collect 
  the 
  escaping 
  gas. 
  

   As, 
  however, 
  abundant 
  red 
  fumes 
  appeared, 
  it 
  was 
  concluded 
  

   that 
  the 
  gas 
  came 
  from 
  the 
  acid 
  and 
  it 
  was 
  allowed 
  to 
  escape. 
  

   The 
  great 
  deficiency 
  in 
  the 
  following 
  analysis 
  indicates, 
  how- 
  

   ever, 
  that 
  a 
  gaseous 
  constituent 
  may 
  have 
  been 
  set 
  free 
  from 
  

   the 
  substance. 
  The 
  heavy 
  residue 
  was 
  separated 
  by 
  decanta- 
  

   tion 
  and 
  divided 
  with 
  the 
  magnet 
  into 
  rhabdite 
  and 
  a 
  non- 
  

   magnetic 
  portion 
  consisting 
  of 
  rust 
  particles 
  and 
  grains 
  of 
  

   sand 
  evidently 
  from 
  laboratory 
  dust, 
  or 
  dirt 
  on 
  the 
  original 
  

   rust 
  covered 
  surface 
  of 
  the 
  meteorite. 
  Nothing 
  of 
  interest 
  

   that 
  could 
  be 
  referred 
  to 
  the 
  meteorite 
  could 
  be 
  observed 
  in 
  it 
  

   under 
  the 
  microscope. 
  The 
  light, 
  flocculent 
  residue 
  collected 
  

   on 
  an 
  asbestus 
  filter 
  was 
  burned 
  and 
  determined 
  as 
  carbon 
  by 
  

   collecting 
  and 
  weighing 
  the 
  gas 
  given 
  off. 
  The 
  other 
  constit- 
  

   uents 
  were 
  determined 
  in 
  the 
  nitric 
  acid 
  solution. 
  The 
  num- 
  

   bers 
  given 
  below 
  can 
  only 
  be 
  considered 
  as 
  approximative, 
  as 
  

   the 
  separation 
  by 
  decantation 
  may 
  not 
  have 
  been 
  complete 
  and 
  

   there 
  may 
  have 
  been 
  some 
  loss 
  in 
  the 
  mechanical 
  separation 
  of 
  

   the 
  heavy 
  residue. 
  Still 
  after 
  making 
  all 
  due 
  allowances 
  for 
  

   defects 
  in 
  the 
  process 
  of 
  analysis, 
  the 
  deficiencies 
  are 
  too 
  great 
  

   to 
  be 
  accounted 
  for 
  in 
  this 
  manner 
  and 
  must 
  be 
  attributed 
  to 
  

   one 
  or 
  more 
  undetermined 
  constituents, 
  possibly 
  gaseous. 
  The 
  

   result 
  obtained 
  is 
  as 
  follows 
  : 
  

  

  Fe 
  Ml 
  

  

  NiandCo 
  37*47 
  

  

  Cr 
  tr. 
  

  

  Cu 
  2-84 
  

  

  P 
  0-88 
  

  

  C 
  5-60 
  

  

  Rhabdite 
  1 
  1 
  '65 
  

  

  Non-magnetic 
  residue 
  8*30 
  

  

  68*30 
  

  

  The 
  phosphorus 
  can 
  probably 
  be 
  referred 
  to 
  a 
  partial 
  solu- 
  

   tion 
  of 
  the 
  rhabdite 
  and 
  the 
  traces 
  of 
  chromium 
  may 
  perhaps 
  

   indicate 
  an 
  admixture 
  of 
  daubreelite. 
  The 
  whitish 
  flocculent 
  

   substance 
  giving 
  carbonic 
  acid 
  on 
  vburning 
  is 
  very 
  extraordi- 
  

   nary, 
  though 
  something 
  similar 
  seems 
  to 
  have 
  been 
  observed 
  

   by 
  Tschermak 
  (as 
  quoted 
  by 
  Flight, 
  History 
  of 
  Meteorites, 
  p. 
  

   163,) 
  in 
  the 
  Goalpara 
  meteorite. 
  As 
  a 
  similar 
  residue 
  with 
  the 
  

   same 
  aspect 
  and 
  behavior 
  with 
  acids 
  and 
  with 
  a 
  strong 
  nickel 
  

   reaction 
  in 
  the 
  borax 
  bead 
  was 
  obtained 
  in 
  small 
  quantities 
  

   from 
  Bendego, 
  efforts 
  are 
  now 
  being 
  made 
  to 
  obtain 
  a 
  sufficient 
  

   amount 
  for 
  a 
  more 
  careful 
  study 
  of 
  this 
  curious 
  substance. 
  

  

  