﻿78 
  Scientific 
  Intelligence, 
  

  

  2. 
  Solubilities 
  of 
  Inorganic 
  and 
  Organic 
  Compounds; 
  by 
  

   Atherton 
  Seidell. 
  Large 
  8vo, 
  pp. 
  843. 
  New 
  York, 
  1919 
  

   (D. 
  Van 
  Nostrand 
  Company. 
  Price 
  $7.50 
  net). 
  — 
  This 
  is 
  the 
  

   second 
  edition, 
  enlarged 
  and 
  thoroughly 
  revised, 
  of 
  a 
  most 
  vain- 
  

   able 
  book 
  of 
  reference 
  for 
  chemists. 
  Data 
  of 
  solubility 
  are 
  

   important 
  not 
  only 
  in 
  connection 
  with 
  the 
  scientific 
  investiga- 
  

   tion 
  of 
  the 
  laws 
  governing 
  solution, 
  but 
  they 
  are 
  very 
  frequently 
  

   required 
  in 
  connection 
  with 
  various 
  other 
  kinds 
  of 
  chemical 
  

   work. 
  The 
  author 
  has 
  performed 
  an 
  enormous 
  task 
  in 
  the 
  prep- 
  

   aration 
  of 
  this 
  book, 
  and 
  for 
  the 
  present 
  editions 
  many 
  journals 
  

   have 
  been 
  examined 
  page 
  by 
  page 
  in 
  order 
  that 
  data 
  might 
  not 
  

   be 
  overlooked. 
  The 
  tables 
  of 
  solubilities 
  are 
  excellently 
  pre- 
  

   sented 
  with 
  frequent 
  useful 
  notes, 
  while 
  the 
  very 
  numerous 
  ref- 
  

   erences 
  to 
  the 
  literature 
  are 
  conveniently 
  arranged 
  in 
  the 
  form 
  

   of 
  an 
  author 
  index. 
  A 
  good 
  chapter 
  on 
  methods 
  for 
  the 
  deter- 
  

   mination 
  of 
  solubility 
  is 
  included. 
  h. 
  l. 
  w. 
  

  

  3. 
  The 
  Metals 
  of 
  the 
  Bare 
  Earths; 
  by 
  James 
  Frederick 
  

   Spencer. 
  8vo, 
  pp. 
  279. 
  London, 
  1919 
  (Longmans, 
  Green 
  & 
  

   Co. 
  Price 
  $4.50 
  net). 
  — 
  This 
  is 
  one 
  of 
  the 
  important 
  series 
  of 
  

   Monographs 
  of 
  Inorganic 
  and 
  Physical 
  Chemistry, 
  edited 
  by 
  Dr. 
  

   Alexander 
  Findlay. 
  It 
  gives 
  an 
  excellent 
  account 
  of 
  the 
  sub- 
  

   ject, 
  including 
  the 
  history 
  of 
  the 
  discovery 
  of 
  the 
  rare 
  earths, 
  

   their 
  occurrence 
  in 
  minerals, 
  the 
  methods 
  used 
  for 
  their 
  separa- 
  

   tion, 
  their 
  compounds, 
  the 
  determination 
  of 
  their 
  atomic 
  weights, 
  

   their 
  positions 
  in 
  the 
  periodic 
  system 
  of 
  the 
  elements, 
  and 
  their 
  

   practical 
  uses. 
  

  

  A 
  particularly 
  useful 
  feature 
  of 
  the 
  work 
  is 
  a 
  table 
  of 
  more 
  

   than 
  1000 
  references 
  to 
  the 
  literature 
  of 
  the 
  subject. 
  There 
  are 
  

   also 
  full 
  name 
  and 
  subject 
  indices. 
  h. 
  l. 
  w. 
  

  

  4. 
  The 
  Analysis 
  of 
  Silicate 
  and 
  Carbonate 
  Rocks; 
  by 
  W. 
  F. 
  

   Hillebrand. 
  8vo, 
  pp. 
  285. 
  Washington, 
  1919 
  (U. 
  S. 
  Geolog- 
  

   ical 
  Survey, 
  Bulletin 
  700; 
  Government 
  Printing 
  Office). 
  — 
  This 
  

   is 
  a 
  revised 
  and 
  enlarged 
  edition 
  of 
  Bulletin 
  422 
  bearing 
  the 
  

   same 
  title, 
  and 
  there 
  have 
  been 
  several 
  still 
  earlier 
  editions 
  of 
  

   this 
  important 
  hand-book. 
  The 
  great 
  value 
  and 
  reliability 
  of 
  

   Dr. 
  Hillebrand 
  's 
  advice 
  in 
  regard 
  to 
  rock 
  analysis 
  is 
  so 
  well- 
  

   known, 
  and 
  these 
  bulletins 
  have 
  been 
  so 
  widely 
  used 
  by 
  mineral 
  

   analysts, 
  that 
  it 
  is 
  sufficient 
  here 
  to 
  merely 
  welcome 
  the 
  new 
  edi- 
  

   tion, 
  to 
  say 
  that 
  changes 
  that 
  have 
  been 
  made 
  in 
  it 
  appear 
  to 
  be 
  

   most 
  excellent, 
  and 
  to 
  thank 
  the 
  author 
  for 
  it. 
  h. 
  l. 
  w. 
  

  

  5. 
  Report 
  of 
  the 
  International 
  Committee 
  on 
  Atomic 
  Weights 
  

   for 
  1919-20. 
  — 
  This 
  report 
  is 
  signed 
  by 
  F. 
  W. 
  Clarke 
  of 
  this 
  

   country, 
  T. 
  E. 
  Thorpe 
  of 
  England 
  and 
  G. 
  Urbain 
  of 
  France. 
  

   No 
  new 
  table 
  has 
  been 
  presented 
  since 
  the 
  one 
  for 
  1916, 
  but 
  in 
  

   spite 
  of 
  the 
  considerable 
  period 
  that 
  has 
  elapsed 
  there 
  are 
  but 
  

   few 
  changes 
  in 
  the 
  table 
  now 
  given 
  for 
  1920. 
  These 
  changes 
  

   give 
  the 
  new 
  values 
  : 
  Argon 
  = 
  39-9, 
  Boron 
  = 
  10-9, 
  Gallium 
  = 
  

   70- 
  1, 
  Nitrogen 
  = 
  14- 
  008, 
  Thorium 
  = 
  232-15 
  and 
  Yttrium 
  = 
  

  

  