﻿350 
  Clarke 
  and 
  Steiger 
  — 
  Action 
  of 
  Ammonium 
  Chloride 
  

  

  soda 
  were 
  taken 
  out, 
  while 
  144 
  of 
  ammonia 
  was 
  retained 
  by 
  

   the 
  residue. 
  Here 
  again 
  two-thirds, 
  approximately, 
  of 
  the 
  

   bases, 
  had 
  been 
  converted 
  into 
  chlorides 
  by 
  the 
  reaction. 
  The 
  

   open 
  crucible 
  and 
  the 
  sealed 
  tube 
  gave 
  essentially 
  the 
  same 
  

   results, 
  although 
  the 
  retention 
  of 
  ammonia 
  was 
  not 
  noticed 
  by 
  

   Schneider 
  and 
  Clarke. 
  

  

  In 
  order 
  to 
  obtain 
  further 
  light 
  upon 
  pectolite 
  we 
  continued 
  

   our 
  experiments 
  with 
  the 
  sealed 
  tube 
  method, 
  and 
  have 
  

   obtained 
  very 
  variable 
  results. 
  All 
  of 
  the 
  heatings 
  with 
  

   ammonium 
  chloride 
  were 
  conducted 
  at 
  350°, 
  and 
  the 
  pecto- 
  

   lite 
  used 
  was 
  from 
  the 
  same 
  Bergen 
  Hill 
  specimen 
  which 
  

   served 
  us 
  for 
  our 
  previous 
  work. 
  Our 
  data 
  are 
  as 
  follows 
  ; 
  

   including 
  for 
  convenience 
  of 
  comparison 
  the 
  preliminary 
  

   experiment 
  which 
  was 
  cited 
  above. 
  

  

  A. 
  Heated 
  6 
  hours. 
  On 
  leaching, 
  20-72 
  per 
  cent 
  of 
  lime, 
  6*46 
  

  

  soda, 
  and 
  0-11 
  alumina 
  dissolved. 
  The 
  residue 
  contained 
  

   1-44 
  per 
  cent 
  of 
  ammonia. 
  

  

  B. 
  Heated 
  6 
  hours. 
  20-10 
  per 
  cent 
  lime 
  and 
  5*80 
  of 
  soda 
  extracted. 
  

  

  1-45 
  per 
  cent 
  ammonia 
  in 
  the 
  residue. 
  The 
  residue 
  was 
  also 
  

   examined 
  for 
  silica 
  soluble 
  in 
  25 
  per 
  cent 
  sodium 
  carbonate 
  

   solution 
  (on 
  15 
  minutes 
  boiling), 
  and 
  43-38 
  per 
  cent 
  was 
  found. 
  

  

  C. 
  Heated 
  6 
  hours. 
  Soluble 
  portion 
  neglected. 
  The 
  residue 
  con- 
  

  

  tained 
  2-23 
  per 
  cent 
  of 
  ammonia 
  and 
  61 
  #, 
  79 
  per 
  cent 
  of 
  solu- 
  

   ble 
  silica. 
  The 
  full 
  analysis 
  of 
  this 
  residue 
  is 
  given 
  later. 
  

  

  D. 
  Heated 
  10 
  hours. 
  A 
  complex 
  breaking 
  up 
  of 
  the 
  pectolite 
  

  

  took 
  place, 
  and 
  leaching 
  with 
  water 
  extracted 
  the 
  following 
  

   percentages 
  : 
  

  

  Si0 
  2 
  5-43 
  

  

  A1 
  2 
  3 
  -22 
  

  

  CaO 
  . 
  28-20 
  

  

  MnO 
  -23 
  

  

  Na 
  2 
  8-29 
  

  

  The 
  residue 
  from 
  this 
  leaching 
  contained 
  39*63 
  of 
  soluble 
  

   silica, 
  but 
  ammonia 
  was 
  not 
  determined. 
  

  

  These 
  results 
  are 
  so 
  irregular 
  that 
  definite 
  conclusions 
  can 
  

   hardly 
  be 
  drawn 
  from 
  them. 
  A 
  and 
  B 
  agree 
  fairly 
  with 
  each 
  

   other, 
  and 
  also 
  with 
  the 
  earlier 
  work 
  of 
  Schneider 
  and 
  Clarke. 
  

   C 
  contains 
  more 
  ammonia, 
  but 
  differs 
  widely 
  from 
  B 
  as 
  to 
  the 
  

   amount 
  of 
  soluble 
  silica 
  in 
  the 
  residue. 
  D, 
  which 
  represents 
  

   a 
  long 
  heating, 
  indicates 
  a 
  more 
  complete 
  reaction 
  than 
  was 
  

   observed 
  in 
  either 
  of 
  the 
  other 
  cases. 
  

  

  An 
  ammonium 
  compound, 
  however, 
  is 
  evidently 
  formed 
  

   during 
  the 
  reaction, 
  although 
  its 
  precise 
  nature 
  cannot 
  be 
  

   determined 
  from 
  the 
  evidence 
  now 
  in 
  hand. 
  Something 
  may 
  

   be 
  inferred 
  from 
  the 
  following 
  figures, 
  which 
  are 
  to 
  be 
  sum- 
  

   marized 
  thus: 
  First, 
  we 
  reproduce 
  from 
  our 
  earlier 
  paper 
  

  

  