﻿208 
  M. 
  Austin 
  — 
  Double 
  Amnioniunx 
  Phosphates. 
  

  

  with 
  ammonia. 
  None 
  was 
  found 
  in 
  these 
  cases, 
  nor 
  in 
  any 
  of 
  

   the 
  following 
  work. 
  Faint 
  traces 
  of 
  chloride 
  were 
  found 
  in 
  

   the 
  residues 
  after 
  ignition 
  after 
  dissolving 
  in 
  nitric 
  acid 
  and 
  

   testing 
  with 
  silver 
  nitrate. 
  

  

  The 
  results 
  are 
  in 
  every 
  case 
  in 
  excess 
  of 
  the 
  theory 
  for 
  the 
  

   pyrophosphate 
  derived 
  by 
  ignition 
  of 
  the 
  ammonium 
  beryl- 
  

   lium 
  phosphate, 
  possibly 
  because 
  the 
  ammonium 
  chloride 
  

   present 
  may 
  have 
  a 
  tendency 
  to 
  form 
  a 
  salt 
  too 
  rich 
  in 
  ammo- 
  

   nium 
  (as 
  was 
  shown 
  to 
  be 
  the 
  case 
  with 
  the 
  magnesium 
  salt), 
  con- 
  

   sequently 
  giving 
  too 
  much 
  phosphoric 
  acid 
  in 
  the 
  ignited 
  

   residue 
  ; 
  or, 
  because 
  of 
  inclusion 
  of 
  the 
  chloride 
  and 
  phosphoric 
  

   acid. 
  It 
  might 
  reasonably 
  be 
  expected 
  that 
  some 
  phosphoric 
  

   acid 
  may 
  be 
  held 
  since 
  a 
  trace 
  of 
  chloride 
  was 
  found. 
  Either 
  

   or 
  both 
  of 
  these 
  substances 
  may 
  have 
  been 
  held 
  mechanically, 
  

   or 
  in 
  combination. 
  

  

  It 
  was 
  found 
  that 
  by 
  boiling 
  for 
  some 
  time 
  the 
  solution 
  of 
  

   beryllium 
  chloride 
  with 
  microcosmic 
  salt 
  — 
  (6) 
  section 
  B 
  of 
  the 
  

   table 
  — 
  precipitating 
  in 
  the 
  same 
  manner 
  as 
  when 
  ammonium 
  

   phosphate 
  was 
  used 
  — 
  that 
  the 
  same 
  sort 
  of 
  powdery 
  mass 
  

   remained 
  as 
  was 
  obtained 
  by 
  the 
  ammonium 
  phosphate. 
  The 
  

   residue 
  being 
  tested 
  for 
  sodium 
  according 
  to 
  the 
  method 
  

   brought 
  out 
  by 
  Kreider 
  and 
  Breckenridge,^ 
  showed 
  sodium 
  

   present 
  to 
  the 
  amount 
  of 
  0-0062 
  grams 
  reckoned 
  as 
  sodium 
  

   phosphate. 
  It 
  may 
  be 
  reasonably 
  supposed 
  that 
  the 
  presence 
  

   of 
  the 
  sodium 
  was 
  due 
  to 
  one 
  of 
  two 
  causes, 
  inclusion 
  of 
  the 
  

   soluble 
  phosphate, 
  or 
  to 
  a 
  tendency 
  on 
  the 
  part 
  of 
  the 
  beryl- 
  

   lium 
  to 
  form 
  an 
  ammoniumf 
  sodium 
  beryllium 
  phosphate 
  or 
  a 
  

   sodium;}: 
  beryllium 
  phosphate, 
  both 
  of 
  which 
  are 
  known 
  to 
  

   exist. 
  Long 
  boiling 
  of 
  the 
  precipitates 
  is 
  tedious, 
  and, 
  unless 
  

   great 
  care 
  is 
  taken, 
  may 
  involve 
  small 
  losses 
  of 
  material 
  ; 
  hence 
  

   if 
  the 
  same 
  results 
  could 
  be 
  obtained 
  with 
  less 
  boiling 
  such 
  

   treatment 
  would 
  be 
  decidedly 
  advantageous. 
  The 
  results 
  in 
  

   section 
  C 
  of 
  the 
  table 
  were 
  obtained 
  by 
  adding 
  microcosmic 
  

   salt 
  to 
  the 
  hot 
  solutions 
  of 
  the 
  chloride, 
  boiling 
  live 
  minutes, 
  

   cooling, 
  filtering 
  off 
  on 
  an 
  ashless 
  filter 
  — 
  because 
  of 
  the 
  tlocky 
  

   condition 
  of 
  the 
  precipitate 
  — 
  treating 
  as 
  usual 
  before 
  igniting 
  

   the 
  residue 
  in 
  a 
  platinum 
  crucible. 
  The 
  results 
  compare 
  well 
  

   with 
  those 
  obtained 
  by 
  long 
  boiling 
  of 
  the 
  precipitated 
  beryl- 
  

   lium 
  — 
  although 
  all 
  are 
  in 
  excess 
  of 
  the 
  theory. 
  That 
  ammo- 
  

   nium 
  chloride 
  here, 
  as 
  in 
  cases 
  above, 
  has 
  a 
  marked 
  effect 
  in 
  

   changing 
  the 
  constitution 
  of 
  the 
  phosphate 
  precipitated 
  by 
  

   microcosmic 
  salt 
  is 
  not 
  readily 
  seen. 
  It 
  is 
  obvious 
  that 
  the 
  

   presence 
  of 
  an 
  excess 
  of 
  the 
  soluble 
  phosphate 
  is 
  essential 
  to 
  

  

  * 
  This 
  Journal, 
  vol. 
  ii, 
  263. 
  

  

  f 
  Persoz, 
  Liebig's 
  Annalen, 
  Ixv, 
  174; 
  Atterberg, 
  Bulletin 
  d. 
  1. 
  Soc. 
  chim. 
  d 
  

   Paris, 
  xxiv, 
  3o8. 
  

  

  X 
  SchefEer, 
  Liebig's 
  Annalen, 
  cix, 
  144. 
  

  

  