﻿118 
  Clarice 
  and 
  Steiger 
  — 
  Action 
  of 
  Ammonium 
  

  

  water, 
  the 
  sodium 
  chloride 
  which 
  had 
  been 
  formed 
  was 
  esti- 
  

   mated, 
  and 
  in 
  the 
  residue 
  the 
  fixed 
  ammonia 
  was 
  determined. 
  

   In 
  this 
  series 
  there 
  were 
  four 
  experiments, 
  with 
  results 
  as 
  

   follows 
  : 
  

  

  Hours 
  Soda 
  Ammonia 
  in 
  

  

  heated. 
  Temperature. 
  removed. 
  residue. 
  

  

  A 
  .__ 
  28 
  300° 
  4-75 
  2-04 
  

  

  B 
  8| 
  350° 
  6-36 
  2-88 
  

  

  C 
  26 
  350° 
  3-76 
  ] 
  '72 
  

  

  D 
  5 
  340° 
  to 
  380° 
  6*70 
  2'85 
  

  

  In 
  our 
  work 
  upon 
  the 
  analcite 
  from 
  Nova 
  Scotia 
  the 
  ammonia 
  

   retained 
  by 
  the 
  leached 
  residue 
  ranged 
  from 
  2*03 
  to 
  2*36 
  per 
  

   cent, 
  while 
  the 
  extracted 
  soda 
  varied 
  from 
  5*07 
  to 
  6*10. 
  In 
  

   two 
  of 
  the 
  new 
  experiments 
  these 
  figures 
  are 
  perceptibly 
  

   exceeded, 
  and 
  they 
  represent 
  the 
  shortest 
  duration 
  of 
  heating. 
  

   Prolonged 
  heating 
  seems 
  to 
  be 
  undesirable, 
  and 
  to 
  undo 
  a 
  part 
  

   of 
  the 
  reaction 
  which 
  has 
  taken 
  place 
  ; 
  otherwise 
  the 
  results 
  

   obtained 
  are 
  of 
  the 
  same 
  order 
  as 
  their 
  predecessors. 
  About 
  

   one-half 
  of 
  the 
  soda 
  in 
  the 
  analcite 
  is 
  converted 
  into 
  chloride, 
  

   while 
  variable 
  ammonia 
  is 
  retained. 
  

  

  In 
  the 
  second 
  series 
  of 
  experiments 
  a 
  sealed 
  tube 
  was 
  sub- 
  

   stituted 
  for 
  the 
  open 
  crucible. 
  The 
  powdered 
  analcite 
  was 
  

   intimately 
  ground 
  with 
  four 
  times 
  its 
  weight 
  of 
  ammonium 
  

   chloride, 
  as 
  before, 
  and 
  then 
  heated 
  to 
  350° 
  in 
  a 
  tube 
  furnace 
  

   for 
  from 
  four 
  to 
  eleven 
  hours. 
  Under 
  these 
  conditions 
  practi- 
  

   cally 
  the 
  whole 
  of 
  the 
  soda 
  in 
  the 
  mineral 
  was 
  converted 
  into 
  

   sodium 
  chloride, 
  while 
  all 
  of 
  the 
  liberated 
  ammonia 
  was 
  

   absorbed 
  by 
  the 
  residual 
  silicate. 
  Upon 
  leaching 
  the 
  contents 
  

   of 
  the 
  tube 
  with 
  water, 
  to 
  remove 
  sodium 
  and 
  ammonium 
  

   chlorides, 
  a 
  residue 
  was 
  obtained 
  which 
  exhibited 
  constant 
  

   composition 
  whether 
  dried 
  at 
  100° 
  or 
  at 
  the 
  ordinary 
  tem- 
  

   perature 
  of 
  the 
  air. 
  Three 
  samples 
  of 
  the 
  residue 
  were 
  pre- 
  

   pared 
  and 
  analyzed 
  ; 
  other 
  samples 
  were 
  partially 
  examined 
  

   and 
  used 
  for 
  subsidiary 
  experiments. 
  The 
  three 
  analyses, 
  let- 
  

   tered 
  for 
  future 
  reference, 
  were 
  as 
  follows, 
  the 
  analcite 
  itself 
  

   being 
  included 
  in 
  the 
  table 
  for 
  comparison. 
  

  

  • 
  Analcite. 
  Residue 
  A. 
  Residue 
  B. 
  Residue 
  C. 
  

  

  Si0 
  2 
  .... 
  55-72 
  61-93 
  61-68 
  61'79 
  

  

  A1 
  2 
  3 
  23-06 
  25-21 
  25'33 
  25'24 
  

  

  CaO 
  -17 
  

  

  Na 
  Q 
  0.._ 
  12-46 
  -40 
  -22 
  -28 
  

  

  NH 
  3 
  7*23 
  6-95 
  7'71 
  

  

  H 
  2 
  r 
  _._ 
  8-39 
  4-50 
  4*91 
  5'01 
  

  

  99-80 
  99 
  27 
  99'09 
  100'03 
  

  

  Residue 
  C 
  was 
  prepared 
  with 
  the 
  greatest 
  care, 
  and 
  was 
  air 
  

   dried. 
  Exposed 
  over 
  sulphuric 
  acid 
  in 
  a 
  vacuum 
  desiccator 
  for 
  

  

  