﻿Physics. 
  221 
  

  

  7. 
  The 
  Kinetic 
  Theory 
  of 
  Gases. 
  Elementary 
  Treatise 
  with 
  

   Mathematical 
  Appendices 
  ; 
  by 
  Dr. 
  Oskar 
  Emil 
  Meyer. 
  Trans- 
  

   lated 
  from 
  the 
  second 
  revised 
  edition 
  by 
  Robert 
  E. 
  Baynes 
  ; 
  pp. 
  

   472. 
  London, 
  1S99 
  (Longmans, 
  Green 
  & 
  Co.). 
  — 
  The 
  first 
  edition 
  

   of 
  Dr. 
  Meyer's 
  work 
  appeared 
  in 
  1877, 
  when 
  the 
  Kinetic 
  Theory 
  

   of 
  Gases 
  had 
  just 
  been 
  fully 
  developed. 
  It 
  was 
  an 
  admirable 
  dis- 
  

   cussion 
  of 
  the 
  subject 
  at 
  that 
  time, 
  and 
  for 
  the 
  ordinary 
  student 
  

   of 
  physics 
  or 
  chemistry 
  had 
  the 
  great 
  advantage 
  of 
  being 
  pre- 
  

   sented 
  in 
  a 
  readily 
  intelligible 
  form 
  and 
  not 
  simply 
  from 
  the 
  

   mathematical 
  standpoint. 
  This 
  first 
  German 
  edition 
  has 
  been 
  

   widely 
  and 
  favorably 
  known 
  in 
  England 
  and 
  this 
  country. 
  

   Now, 
  after 
  the 
  lapse 
  of 
  more 
  than 
  two 
  decades, 
  in 
  which 
  the 
  

   theory 
  has 
  been 
  perfected 
  and 
  at 
  the 
  same 
  time 
  the 
  difficulties 
  

   involved 
  in 
  it 
  have 
  been 
  clearly 
  shown, 
  Dr. 
  Meyer 
  brings 
  out 
  a 
  

   second 
  edition, 
  presenting 
  the 
  same 
  subject 
  as 
  it 
  stands 
  to-day. 
  

   The 
  plan 
  of 
  the 
  earlier 
  work 
  has 
  been 
  retained, 
  the 
  body 
  of 
  the 
  

   volume 
  containing 
  the 
  general 
  discussion 
  and 
  the 
  mathematical 
  

   treatment 
  being 
  given 
  in 
  the 
  series 
  of 
  appendices. 
  This, 
  as 
  will 
  

   be 
  seen, 
  at 
  once 
  meets 
  the 
  needs 
  of 
  all 
  classes 
  of 
  readers. 
  The 
  

   work 
  is 
  so 
  well 
  known 
  that 
  special 
  discussion 
  of 
  its 
  contents, 
  or 
  

   comment 
  upon 
  the 
  clearness 
  of 
  the 
  treatment, 
  hardly 
  seem 
  

   required. 
  The 
  English 
  translator 
  has 
  performed 
  important 
  ser- 
  

   vice 
  in 
  presenting 
  the 
  work 
  to 
  students 
  in 
  England 
  and 
  America 
  

   in 
  their 
  own 
  language. 
  The 
  translation 
  has 
  had 
  the 
  advantage 
  of 
  

   some 
  additions 
  and 
  modifications 
  suggested 
  by 
  Prof. 
  Meyer, 
  under 
  

   whose 
  eye 
  the 
  proofs 
  have 
  passed. 
  

  

  8. 
  The 
  Rise 
  and 
  Development 
  of 
  the 
  Liquefaction 
  of 
  Gases,by 
  

   Willett 
  L. 
  Hardin, 
  Ph.D., 
  Harrison 
  Senior 
  Fellow 
  in 
  Chemis- 
  

   try 
  in 
  the 
  University 
  of 
  Pennsylvania; 
  pp. 
  250. 
  New 
  York, 
  

   1899 
  (The 
  Macmillan 
  Co.). 
  — 
  An 
  evidence 
  of 
  the 
  wide 
  interest 
  

   felt 
  in 
  scientific 
  subjects 
  at 
  the 
  present 
  time 
  is 
  given 
  by 
  the 
  fact 
  

   that 
  when 
  a 
  new 
  subject 
  is 
  rapidly 
  developed, 
  it 
  is 
  not 
  long 
  before 
  

   a 
  comprehensive 
  volume 
  giving 
  the 
  main 
  facts 
  regarding 
  it 
  is 
  

   available 
  for 
  the 
  general 
  public. 
  The 
  present 
  volume 
  is 
  a 
  case 
  in 
  

   hand, 
  and 
  in 
  preparing 
  it 
  the 
  author 
  has 
  performed 
  a 
  service 
  to 
  

   the 
  many 
  interested 
  in 
  the 
  past 
  history 
  of 
  this 
  subject, 
  in 
  its 
  pres- 
  

   ent 
  development 
  and 
  also 
  in 
  the 
  possibilities 
  for 
  the 
  future, 
  a 
  topic 
  

   somewhat 
  imaginatively 
  treated 
  by 
  the 
  public 
  press. 
  From 
  the 
  

   early 
  days 
  of 
  Boyle 
  and 
  Mariotte, 
  he 
  passes 
  on 
  to 
  the 
  classical 
  

   work 
  of 
  Faraday 
  and 
  Andrews, 
  and 
  then 
  to 
  the 
  more 
  recent 
  labors 
  

   of 
  those 
  who 
  have 
  proved 
  that 
  the 
  so-called 
  permanent 
  gases 
  have 
  

   no 
  existence, 
  the 
  last 
  steps 
  being 
  the 
  liquefaction 
  and 
  solidifica- 
  

   tion 
  of 
  hydrogen 
  by 
  Devvar. 
  This 
  volume 
  should 
  be 
  read 
  with 
  

   interest 
  by 
  a 
  wide 
  circle 
  of 
  readers. 
  

  

  9. 
  An 
  Introduction 
  to 
  the 
  Study 
  of 
  Central 
  Station 
  Electricity 
  

   Supply, 
  by 
  Albert 
  Gay 
  and 
  C. 
  H. 
  Yeaman; 
  pp. 
  467. 
  London, 
  

   1899 
  (Whittaker 
  & 
  Co.). 
  — 
  This 
  excellent 
  work 
  is 
  one 
  of 
  a 
  

   series 
  of 
  volumes 
  prepared 
  expressly 
  for 
  electrical 
  engineers 
  ; 
  it 
  

   gives 
  a 
  clear 
  and 
  thorough 
  statement 
  of 
  the 
  many 
  branches 
  of 
  

   work 
  involved 
  in 
  the 
  supply 
  of 
  electricity 
  from 
  a 
  central 
  station. 
  

  

  