﻿Chemistry 
  and 
  Physics. 
  243 
  

  

  line 
  was 
  quite 
  bright. 
  Indeed 
  in 
  one 
  experiment 
  the 
  product 
  of 
  

   this 
  heating 
  collected 
  in 
  four 
  stages 
  gave 
  different 
  spectra. 
  The 
  

   spectrum 
  of 
  the 
  gas 
  from 
  eliasite 
  contains 
  lines 
  indicating 
  a 
  new 
  

   gas, 
  thus 
  resembling 
  broggerite 
  and 
  cleveite. 
  The 
  fact 
  that 
  D 
  3 
  

   is 
  not 
  necessarily 
  present 
  would 
  seem 
  to 
  favor 
  the 
  view 
  that 
  the 
  

   gases 
  from 
  these 
  minerals 
  are 
  complex. 
  

  

  As 
  to 
  uraninite, 
  Lockyerhas 
  brought 
  together 
  his 
  notes 
  on 
  the 
  

   spectra 
  of 
  the 
  gases 
  obtained 
  from 
  this 
  mineral. 
  In 
  addition 
  to 
  

   the 
  hydrogen 
  lines, 
  he 
  has 
  found 
  in 
  the 
  spectra 
  of 
  these 
  mineral 
  

   gases 
  all 
  those 
  of 
  the 
  chromospheric 
  lines 
  in 
  Young's 
  list 
  which 
  

   have 
  a 
  frequency 
  of 
  100. 
  From 
  wave-length 
  determinations 
  

   which 
  he 
  has 
  made, 
  he 
  has 
  but 
  little 
  doubt 
  as 
  to 
  the 
  coincidence 
  

   of 
  several 
  lines 
  in 
  the 
  spectra 
  of 
  these 
  new 
  gases 
  with 
  lines 
  

   appearing 
  in 
  the 
  chromosphere, 
  the 
  nebulas 
  and 
  the 
  white 
  stars. 
  

   Probably 
  too 
  some 
  often 
  observed 
  lines, 
  not 
  so 
  far 
  identified, 
  

   belong 
  to 
  gases 
  in 
  the 
  chromosphere 
  not 
  hitherto 
  recorded. 
  Since, 
  

   as 
  the 
  result 
  of 
  diffusion 
  experiments 
  made 
  on 
  cleveite 
  gas 
  at 
  dif- 
  

   erent 
  pressures, 
  Runge 
  and 
  Paschen 
  concluded 
  that 
  the 
  gas 
  giv- 
  

   ing 
  the 
  line 
  D 
  3 
  was 
  heavier 
  than 
  that 
  giving 
  the 
  line 
  5015*7, 
  the 
  

   author 
  regarded 
  it 
  as 
  important 
  for 
  stellar 
  classification 
  to 
  settle 
  

   the 
  matter 
  and 
  has 
  made 
  experiments 
  in 
  which 
  the 
  pressures 
  were 
  

   maintained 
  the 
  same. 
  He 
  concludes 
  that 
  if 
  a 
  true 
  diffusion 
  of 
  

   one 
  constituent 
  takes 
  place, 
  the 
  component 
  giving 
  D 
  3 
  is 
  lighter 
  

   than 
  the 
  one 
  giving 
  the 
  line 
  of 
  wave 
  length 
  5105*7 
  ; 
  this 
  being 
  in 
  

   harmony 
  with 
  solar 
  and 
  stellar 
  results. 
  — 
  Proc. 
  Hoy. 
  Soc, 
  lix, 
  1-3, 
  

   4-8, 
  342-343, 
  1895-6. 
  G. 
  F. 
  B. 
  

  

  5. 
  On 
  the 
  preparation 
  of 
  Lithium 
  and 
  on 
  a 
  quick 
  Nitrogen 
  

   Absorbent. 
  — 
  It 
  has 
  been 
  shown 
  by 
  Warren 
  that 
  if 
  dry 
  lithium 
  

   hydroxide 
  is 
  heated 
  in 
  an 
  iron 
  tubulated 
  retort, 
  and 
  metallic 
  

   magnesium 
  is 
  added 
  from 
  time 
  to 
  time 
  in 
  small 
  pieces 
  through 
  

   the 
  tubulure, 
  metallic 
  lithium 
  distils 
  over. 
  If 
  the 
  carbonate 
  be 
  

   used, 
  the 
  metal 
  obtained 
  is 
  contaminated 
  with 
  the 
  carbide, 
  which 
  

   evolves 
  acetytene 
  in 
  contact 
  with 
  water. 
  The 
  author 
  also 
  points 
  

   out 
  that 
  a-material 
  absorbing 
  nitrogen 
  with 
  great 
  avidity 
  

   and 
  therefore 
  of 
  use 
  in 
  preparing 
  argon 
  from 
  the 
  air, 
  may 
  be 
  

   obtained 
  by 
  reducing 
  in 
  an 
  atmosphere 
  of 
  hydrogen 
  and 
  at 
  as 
  

   low 
  a 
  temperature 
  as 
  possible, 
  a 
  mixture 
  of 
  magnesium 
  powder 
  

   and 
  calcium 
  or 
  barium 
  hydroxide 
  saturated 
  with 
  a 
  strong 
  solu- 
  

   tion 
  of 
  lithium. 
  — 
  Ghem. 
  iVews, 
  lxxiv, 
  6, 
  July, 
  1896. 
  g. 
  f. 
  b. 
  

  

  6. 
  On 
  the 
  Artificial 
  Production 
  of 
  Diamonds. 
  — 
  By 
  carburet- 
  

   ting 
  iron, 
  fusing 
  it 
  in 
  the 
  electric 
  furnace 
  and 
  allowing 
  it 
  to 
  fall 
  

   into 
  mercury 
  10 
  cm 
  deep 
  covered 
  with 
  a 
  layer 
  of 
  water 
  20 
  cm 
  thick, 
  

   Moissan 
  has 
  obtained 
  granules 
  of 
  irregular 
  shapes 
  and 
  also 
  

   spheres 
  or 
  ellipsoids, 
  both 
  saturated 
  with 
  carbon. 
  While 
  how- 
  

   ever 
  the 
  former 
  contained 
  no 
  carbon 
  of 
  high 
  specific 
  gravity, 
  the 
  

   latter 
  contained 
  both 
  black 
  and 
  transparent 
  diamonds, 
  some 
  of 
  

   which, 
  though 
  microscopic, 
  showed 
  remarkably 
  regular 
  crystalline 
  

   forms. 
  Subsequently 
  larger 
  masses 
  of 
  the 
  carburetted 
  and 
  fused 
  

   iron 
  were 
  allowed 
  to 
  fall 
  into 
  water 
  and 
  mercury 
  at 
  the 
  bottom 
  

   of 
  a 
  pit-shaft 
  32 
  meters 
  deep. 
  But 
  these 
  conditions 
  were 
  not 
  

  

  