﻿Chemistry 
  and 
  Physics. 
  567 
  

  

  is 
  an 
  attempt 
  to 
  tell 
  in 
  short 
  compass 
  the 
  romantic 
  story 
  of 
  the 
  

   discoveries 
  which 
  within 
  the 
  last 
  decade 
  have 
  led 
  us 
  beyond 
  the 
  

   atom." 
  In 
  other 
  words, 
  radio-active 
  and 
  allied 
  phenomena 
  are 
  

   treated 
  in 
  the 
  text 
  from 
  the 
  historic, 
  descriptive, 
  and 
  theoretical 
  

   standpoints. 
  In 
  general, 
  the 
  author's 
  style 
  is 
  very 
  pleasing 
  and 
  

   his 
  presentation 
  of 
  the 
  subject 
  is 
  logical 
  and 
  sufficiently 
  accurate. 
  

   In 
  some 
  places, 
  however, 
  the 
  process 
  of 
  deriving 
  information 
  

   from 
  old 
  editions 
  of 
  standard 
  works 
  has 
  led 
  to 
  inconsistencies 
  

   and 
  inaccuracies 
  of 
  statement 
  which 
  would 
  probably 
  be 
  mislead- 
  

   ing 
  to 
  the 
  lay 
  reader. 
  Moreover, 
  since 
  the 
  preface 
  is 
  dated 
  

   "February, 
  1913," 
  it 
  is 
  fair 
  to 
  express 
  disappointment 
  at 
  the 
  

   omission 
  of 
  the 
  recent 
  discoveries 
  by 
  Friedrich, 
  Knipping, 
  Laue, 
  

   Bragg, 
  and 
  others, 
  of 
  the 
  effect 
  of 
  crystalline 
  structure 
  on 
  Ront- 
  

   gen 
  rays. 
  The 
  book 
  closes 
  with 
  a 
  short 
  bibliography 
  followed 
  

   by 
  a 
  subject-index. 
  h. 
  s. 
  it. 
  

  

  14. 
  Physikalische 
  Chemie 
  der 
  homogenen 
  wnd 
  heterogenen 
  Gas- 
  

   reaktionen, 
  unter 
  besonderer 
  Berucksichtigung 
  der 
  /Strahlungs- 
  

   und 
  Qaantenlehre 
  sowie 
  des 
  N^erntschen 
  Theorems 
  ; 
  von 
  Dr. 
  

   Karl 
  Jellinek. 
  Pp. 
  xiv, 
  844. 
  Leipzig, 
  1913 
  (S. 
  Hirzel). 
  — 
  The 
  

   original 
  plan 
  of 
  this 
  ambitious 
  work 
  is 
  undoubtedly 
  very 
  well 
  

   stated 
  in 
  this 
  title. 
  The 
  encyclopedic 
  thoroughness 
  with 
  which 
  

   it 
  has 
  been 
  carried 
  out 
  would 
  seem, 
  however, 
  to 
  call 
  for 
  at 
  least 
  

   an 
  inversion 
  of 
  the 
  title. 
  We 
  have 
  here 
  in 
  one 
  volume 
  a 
  treatise 
  

   in 
  some 
  detail 
  on 
  general 
  thermodynamics 
  ; 
  one 
  in 
  quite 
  minute 
  

   detail 
  on 
  the 
  thermodynamics 
  of 
  gas 
  reactions, 
  leading 
  up 
  to 
  

   I^ernst's 
  so-called 
  "third 
  law"; 
  a 
  very 
  full 
  sketch 
  of 
  the 
  kinetic 
  

   theory 
  of 
  matter, 
  including 
  both 
  the 
  older 
  atomic 
  and 
  newer 
  

   electronic 
  hypotheses; 
  and 
  a 
  comprehensive 
  account 
  of 
  the 
  theory 
  

   of 
  radiation 
  and 
  its 
  culmination 
  in 
  the 
  " 
  quantum 
  " 
  hypothesis. 
  

   Further, 
  much 
  space 
  is 
  devoted 
  to 
  the 
  experimental 
  methods 
  

   used 
  in 
  testing 
  the 
  predictions 
  of 
  the 
  various 
  theories. 
  Thus 
  it 
  

   is 
  seen 
  that 
  the 
  work 
  can 
  fairly 
  be 
  called 
  compendious, 
  and 
  as 
  a 
  

   reference 
  book 
  it 
  will 
  be 
  found 
  useful 
  by 
  others 
  than 
  physical 
  

   chemists, 
  for 
  whom 
  presumably 
  it 
  was 
  written. 
  The 
  very 
  complete 
  

   indices 
  and 
  bibliography 
  add 
  much 
  to 
  its 
  value 
  in 
  this 
  respect. 
  

  

  The 
  main 
  purpose 
  of 
  such 
  a 
  detailed 
  development 
  of 
  these 
  

   diverse 
  doctrines 
  of 
  physics 
  is 
  to 
  afford 
  a 
  basis 
  for 
  discussion 
  of 
  

   their 
  inter-relations 
  ; 
  in 
  particular 
  to 
  show 
  the 
  significance 
  which 
  

   the 
  " 
  quantum 
  " 
  hypothesis 
  and 
  the 
  electron 
  theory 
  of 
  matter 
  

   have 
  for 
  Nernst's 
  "third 
  law." 
  In 
  the 
  main 
  it 
  may 
  be 
  said 
  that 
  

   the 
  discussion 
  is 
  as 
  adequate 
  as 
  it 
  is 
  timely. 
  Of 
  course, 
  in 
  a 
  work 
  

   of 
  this 
  magnitude 
  it 
  is 
  not 
  difficult 
  to 
  pick 
  flaws, 
  but 
  the 
  reviewer 
  

   has 
  detected 
  none 
  of 
  a 
  serious 
  nature. 
  The 
  general 
  criticism 
  may 
  

   be 
  made 
  that 
  in 
  the 
  mass 
  of 
  detail 
  through 
  which 
  the 
  author 
  leads 
  

   us, 
  one 
  is 
  apt 
  to 
  lose 
  sight 
  of 
  the 
  main 
  relations 
  which 
  it 
  is 
  the 
  

   prime 
  object 
  of 
  the 
  work 
  to 
  elucidate. 
  In 
  particular, 
  the 
  phys- 
  

   icist 
  or 
  the 
  mathematician 
  may 
  object 
  to 
  the 
  unnecessary 
  discur- 
  

   siveness 
  of 
  the 
  mathematical 
  portions 
  — 
  an 
  objection, 
  however, 
  

   which 
  may 
  appear 
  as 
  an 
  advantage 
  to 
  the 
  less 
  mathematically 
  

   minded 
  physical 
  chemist. 
  

  

  