﻿Chemistry 
  and 
  Physics. 
  139 
  

  

  beyond 
  college 
  algebra 
  and 
  trigonometry. 
  The 
  methods 
  of 
  the 
  

   calculus 
  have 
  been 
  introduced 
  only 
  in 
  the 
  cases 
  where 
  their 
  use 
  

   effects 
  appreciable 
  economy 
  of 
  time 
  and 
  mental 
  effort. 
  In 
  both 
  

   volumes 
  each 
  chapter 
  consists 
  of 
  two 
  parts. 
  The 
  first 
  part 
  

   includes 
  definitions, 
  a 
  description 
  of 
  the 
  apparatus, 
  the 
  general 
  

   theory 
  of 
  the 
  methods, 
  and 
  the 
  derivation 
  of 
  the 
  equations 
  used 
  

   in 
  the 
  determinations 
  of 
  the 
  quantities 
  considered 
  in 
  the 
  chapter. 
  

   In 
  the 
  second 
  part 
  of 
  the 
  chapter 
  each 
  determination 
  is 
  described 
  

   in 
  detail 
  with 
  respect 
  to 
  the 
  theory 
  and 
  performance 
  of 
  the 
  

   experiment, 
  and 
  the 
  computation 
  of 
  the 
  result. 
  

  

  The 
  first 
  volume 
  contains 
  three 
  chapters 
  which 
  deal 
  respec- 
  

   tively 
  with 
  general 
  notions 
  regarding 
  physics 
  measurements, 
  

   with 
  fundamental 
  measurements 
  and 
  the 
  properties 
  of 
  matter 
  

   (25 
  experiments), 
  and 
  with 
  optics 
  (25 
  experiments). 
  The 
  four 
  

   chapters 
  of 
  the 
  second 
  volume 
  pertain 
  to 
  vibratory 
  motion 
  (4 
  

   experiments), 
  to 
  sound 
  (10 
  experiments), 
  to 
  heat 
  (20 
  experi- 
  

   ments), 
  and 
  to 
  electricity 
  and 
  magnetism 
  (24 
  experiments). 
  

   At 
  the 
  end 
  of 
  each 
  volume 
  are 
  given 
  numerous 
  tables 
  of 
  physical 
  

   and 
  mathematical 
  constants 
  and 
  an 
  index. 
  Great 
  care 
  has 
  

   been 
  taken 
  both 
  in 
  the 
  selection 
  of 
  the 
  wide 
  range 
  of 
  material 
  

   and 
  in 
  the 
  purely 
  mechanical 
  preparation 
  of 
  the 
  pages, 
  so 
  that 
  

   the 
  two 
  volumes 
  reflect 
  much 
  credit 
  upon 
  the 
  authors 
  and 
  the 
  

   publishers. 
  h. 
  s. 
  u. 
  

  

  9. 
  Comptes 
  Rendus 
  of 
  Observation 
  and 
  Reasoning; 
  by 
  

   J. 
  Y. 
  Buchanan. 
  Pp. 
  xl, 
  452, 
  with 
  14 
  plates. 
  Cambridge, 
  

   1917 
  (University 
  Press). 
  — 
  This 
  volume 
  is 
  essentially 
  a 
  collec- 
  

   tion 
  of 
  twenty-three 
  papers 
  written 
  by 
  the 
  author 
  at 
  different 
  

   times 
  and 
  dealing 
  with 
  a 
  variety 
  of 
  subjects. 
  Since 
  lack 
  of 
  

   space 
  makes 
  it 
  practically 
  impossible 
  to 
  do 
  justice 
  to 
  the 
  immense 
  

   amount 
  of 
  material 
  presented 
  in 
  the 
  book, 
  the 
  titles 
  of 
  a 
  few 
  of 
  

   the 
  articles 
  will 
  now 
  be 
  quoted 
  in 
  order 
  to 
  suggest 
  the 
  scope 
  of 
  

   the 
  work. 
  These 
  are 
  : 
  1 
  Recent 
  Antarctic 
  Exploration, 
  4 
  On 
  

   Steam 
  and 
  Brines, 
  7 
  In 
  and 
  around 
  the 
  Morteratsch 
  Glacier: 
  

   A 
  Study 
  in 
  the 
  Natural 
  History 
  of 
  Ice, 
  10 
  On 
  the 
  Solar 
  Calo- 
  

   rimeter 
  used 
  in 
  Egypt 
  at 
  the 
  Total 
  Solar 
  Eclipse 
  in 
  1882, 
  13 
  

   Eclipse 
  Predictions, 
  16 
  The 
  Royal 
  Society, 
  19 
  The 
  Metrical 
  

   System, 
  and 
  22 
  Lord 
  Milner 
  and 
  Imperial 
  Scholarships. 
  

  

  The 
  table 
  of 
  contents, 
  which 
  covers 
  thirty-two 
  pages, 
  is 
  vir- 
  

   tually 
  a 
  complete 
  summary 
  of 
  the 
  text. 
  A 
  brief 
  "summary 
  

   of 
  contents" 
  takes 
  the 
  place 
  of 
  the 
  customary 
  index. 
  The 
  

   author's 
  style 
  is 
  clear 
  and 
  pleasing, 
  and 
  no 
  pains 
  have 
  been 
  

   spared 
  to 
  make 
  the 
  volume 
  as 
  attractive 
  as 
  possible. 
  The 
  papers 
  

   on 
  antarctic 
  exploration, 
  glaciers, 
  and 
  the 
  natural 
  history 
  of 
  ice 
  

   are 
  extremely 
  interesting 
  as 
  well 
  as 
  instructive. 
  The 
  artistic 
  

   quality 
  of 
  all 
  of 
  the 
  plates 
  leaves 
  nothing 
  to 
  be 
  desired. 
  In 
  

   particular, 
  the 
  figures 
  portraying 
  the 
  curious 
  ice 
  formations 
  in 
  

   the 
  grotto 
  of 
  the 
  Morteratsch 
  Glacier, 
  the 
  solar 
  etching 
  of 
  this 
  

   ice, 
  and 
  the 
  etching 
  of 
  the 
  same 
  by 
  hoar-frost 
  are 
  very 
  beauti- 
  

   ful 
  from 
  both 
  the 
  esthetic 
  and 
  scientific 
  points 
  of 
  view. 
  The 
  

  

  