﻿Chemistry 
  and 
  Physics. 
  423 
  

  

  numerous 
  and 
  apparently 
  complete. 
  It 
  is 
  evident, 
  therefore, 
  that 
  

   the 
  volume 
  will 
  be 
  especially 
  welcome 
  to 
  investigators 
  who 
  con- 
  

   template 
  entering 
  the 
  field 
  of 
  photochemistry. 
  h. 
  s. 
  u. 
  

  

  11. 
  A 
  First 
  Coarse 
  in 
  Physics 
  ; 
  by 
  Robert 
  Andrews 
  Milli- 
  

   kan 
  and 
  Henry 
  Gordon 
  Gale. 
  Revised 
  edition. 
  Pp. 
  x, 
  442, 
  

   with 
  463 
  figures 
  and 
  659 
  problems. 
  Boston, 
  1913 
  (Ginn 
  & 
  Co.). 
  

   — 
  In 
  this 
  volume 
  the 
  authors 
  have 
  maintained 
  the 
  method 
  which 
  

   characterized 
  the 
  first 
  edition 
  and 
  which 
  was 
  largely 
  responsible 
  

   for 
  its 
  pronounced 
  success. 
  In 
  the 
  preface 
  to 
  the 
  last 
  edition 
  

   attention 
  is 
  called 
  to 
  the 
  ten 
  most 
  important 
  changes 
  which 
  have 
  

   been 
  introduced. 
  In 
  brief, 
  most 
  of 
  these 
  alterations 
  are 
  of 
  two 
  

   general 
  kinds; 
  — 
  (a) 
  improved 
  presentation 
  brought 
  about 
  by 
  

   shortening 
  and 
  by 
  simplification, 
  and 
  (b) 
  the 
  introduction 
  of 
  a 
  

   large 
  number 
  of 
  new 
  problems 
  and 
  figures. 
  Furthermore 
  : 
  " 
  The 
  

   approach 
  to 
  the 
  subject 
  of 
  physics 
  has 
  been 
  made 
  more 
  simple 
  

   and 
  interesting 
  by 
  postponing 
  the 
  chapter 
  on 
  force 
  and 
  motion 
  

   until 
  after 
  the 
  discussion 
  of 
  the 
  fascinating 
  phenomena 
  of 
  liquids 
  

   and 
  gases." 
  The 
  book 
  is 
  made 
  very 
  attractive 
  and 
  inspiring 
  by 
  

   the 
  introduction 
  of 
  an 
  excellent 
  selection 
  of 
  about 
  forty 
  half-tones 
  

   of 
  portraits 
  of 
  physicists 
  and 
  of 
  photographs 
  of 
  some 
  of 
  the 
  most 
  

   notable 
  achievements 
  of 
  modern 
  physics, 
  both 
  in 
  the 
  field 
  of 
  

   application 
  and 
  of 
  pure 
  science. 
  Also, 
  the 
  number 
  of 
  pages 
  has 
  

   been 
  reduced 
  by 
  about 
  sixty 
  in 
  order 
  to 
  give 
  opportunity 
  for 
  an 
  

   extended 
  review 
  at 
  the 
  end 
  of 
  the 
  course. 
  The 
  last 
  edition 
  

   unquestionably 
  merits 
  the 
  earnest 
  attention 
  of 
  all 
  who 
  are 
  en- 
  

   gaged 
  in 
  introducing 
  the 
  subject 
  of 
  physics 
  to 
  students. 
  

  

  h. 
  s. 
  . 
  u. 
  

  

  12. 
  Materialien 
  fur 
  eine 
  wissenschaftliche 
  Biographie 
  von 
  

   Gauss 
  ; 
  edited 
  by 
  F. 
  Klein 
  and 
  M. 
  Brendel. 
  Pp. 
  143. 
  Leip- 
  

   zig, 
  1912 
  (B. 
  G. 
  Teubner). 
  — 
  The 
  material 
  presented 
  in 
  this 
  volume 
  

   has 
  been 
  very 
  carefully 
  arranged 
  and 
  worked 
  up 
  by 
  L. 
  Schle- 
  

   singer 
  from 
  the 
  original 
  notes 
  and 
  records 
  of 
  Gauss. 
  The 
  

   subject-matter 
  is 
  divided 
  into 
  two 
  parts 
  entitled 
  respectively, 
  

   " 
  C. 
  F. 
  Gauss 
  : 
  Fragmente 
  zur 
  Theorie 
  der 
  arithmetisch-geome- 
  

   trischen 
  Mittels 
  aus 
  den 
  Jahren, 
  1797-1799" 
  and 
  " 
  Uber 
  Gauss' 
  

   Arbeiten 
  zur 
  Funktionentheorie" 
  The 
  first 
  part, 
  which 
  is 
  prelim- 
  

   inary 
  to 
  the 
  second, 
  is 
  in 
  turn 
  subdivided 
  into 
  three 
  sections. 
  

   The 
  first 
  of 
  these 
  consists 
  essentially 
  in 
  a 
  table 
  of 
  mathematical 
  

   expressions 
  accurately 
  copied 
  from 
  the 
  original 
  manuscripts. 
  In 
  

   the 
  second 
  section 
  Schlesinger 
  explains 
  and 
  comments 
  on 
  the 
  for- 
  

   mulas 
  of 
  the 
  preceding 
  list. 
  The 
  last 
  section 
  of 
  this 
  part 
  deals 
  

   with 
  the 
  probable 
  dates 
  of 
  the 
  results 
  obtained 
  by 
  Gauss. 
  As 
  its 
  

   title 
  implies, 
  the 
  second 
  and 
  main 
  part 
  of 
  the 
  volume 
  relates 
  to 
  

   the 
  investigations 
  of 
  Gauss 
  in 
  the 
  field 
  of 
  the 
  Theory 
  of 
  Functions. 
  

  

  Many 
  of 
  the 
  quotations 
  from 
  the 
  original 
  manuscripts 
  are 
  pub- 
  

   lished 
  for 
  the 
  first 
  time, 
  and 
  the 
  whole 
  book 
  throws 
  much 
  light 
  

   on 
  the 
  various 
  phases 
  of 
  the 
  development 
  of 
  Gauss's 
  ideas 
  and 
  

   thoughts. 
  Consequently 
  this 
  volume 
  should 
  be 
  very 
  acceptable 
  

   to 
  all 
  who 
  are 
  interested 
  in 
  the 
  history 
  of 
  mathematics 
  in 
  general, 
  

   and 
  in 
  that 
  of 
  Gauss's 
  scientific 
  career 
  in 
  particular. 
  h. 
  s. 
  u. 
  

  

  