﻿648 
  Scientific 
  Intelligence. 
  

  

  principles 
  to 
  the 
  Griffin 
  grinding 
  mill, 
  the 
  Howell 
  torpedo, 
  the 
  

   Obry 
  device, 
  the 
  Schlick 
  stabilisator, 
  the 
  Brennan 
  monorail, 
  the 
  

   Anschtitz 
  compass, 
  ballistics, 
  astronomy, 
  geology, 
  and 
  meteor- 
  

   ology. 
  The 
  subject-matter 
  is 
  so 
  presented 
  that 
  the 
  astronomical 
  

   discussions 
  may 
  be 
  omitted 
  without 
  loss 
  of 
  continuity. 
  The 
  text 
  

   has 
  been 
  prepared 
  with 
  care 
  and 
  there 
  is 
  no 
  hesitancy 
  in 
  the 
  

   expression 
  of 
  opinion 
  concerning 
  modern 
  terminology, 
  etc. 
  For 
  

   illustration 
  : 
  " 
  The 
  term 
  gyrostat, 
  often 
  used 
  for 
  gyroscope, 
  is 
  

   particularly 
  objectionable." 
  " 
  There 
  is 
  no 
  such 
  thing 
  as 
  a 
  gyro- 
  

   stat, 
  or 
  instrument 
  which 
  maintains 
  its 
  plane 
  of 
  rotation." 
  Again: 
  

   "The 
  word 
  ' 
  Torque"* 
  is 
  engineering 
  ' 
  slang 
  r 
  ' 
  for 
  couple." 
  "It 
  

   should 
  never 
  be 
  used." 
  Although 
  the 
  book 
  seems 
  excellent 
  in 
  

   itself, 
  some 
  doubt 
  exists 
  in 
  the 
  mind 
  of 
  the 
  reviewer 
  as 
  to 
  whether 
  

   a 
  student 
  possessing 
  only 
  " 
  an 
  elementary 
  knowledge 
  of 
  mechanics" 
  

   would 
  be 
  prepared 
  to 
  read 
  all 
  of 
  the 
  theoretical 
  sections. 
  In 
  one 
  

   place 
  (p. 
  38), 
  at 
  least, 
  a 
  proof 
  depends 
  on 
  the 
  reference 
  in 
  Routh's 
  

   Advanced 
  Dynamics, 
  Art. 
  519. 
  Problems 
  for 
  solution 
  by 
  the 
  

   student 
  are 
  not 
  given 
  in 
  this 
  volume. 
  h. 
  s. 
  it. 
  

  

  10. 
  Medizinische 
  Physik 
  : 
  by 
  Dr. 
  Otto 
  Fischer. 
  Pp. 
  xx, 
  

   1120, 
  with 
  334 
  figures. 
  Leipzig, 
  1913 
  (S. 
  Hirzel).— 
  In 
  this 
  work 
  

   the 
  author 
  has 
  endeavored 
  to 
  present, 
  in 
  such 
  a 
  manner 
  as 
  to 
  be 
  

   readily 
  comprehended 
  by 
  those 
  who 
  are 
  not 
  proficient 
  in 
  mathe- 
  

   matics, 
  certain 
  branches 
  and 
  topics 
  of 
  physics 
  which 
  lie 
  outside 
  of 
  

   the 
  realm 
  of 
  the 
  ordinary 
  curriculum 
  and 
  which 
  are 
  nevertheless 
  

   indispensable 
  for 
  the 
  physician. 
  In 
  order 
  to 
  give 
  the 
  book 
  finite 
  

   dimensions 
  the 
  treatment 
  is 
  wisely 
  restricted 
  to 
  the 
  physical 
  

   aspect 
  of 
  the 
  subject, 
  so 
  that 
  everything 
  of 
  a 
  physical-chemical 
  or 
  

   purely 
  physiological 
  nature 
  has 
  been 
  omitted. 
  The 
  average 
  phy- 
  

   sician's 
  training 
  in 
  physics 
  is 
  considered 
  to 
  need 
  appreciable 
  sup- 
  

   plementing 
  only 
  in 
  three 
  branches, 
  namely, 
  mechanics, 
  acoustics, 
  

   and 
  optics. 
  That 
  these 
  three 
  domains 
  are 
  discussed 
  at 
  great 
  

   length 
  may 
  be 
  inferred 
  from 
  the 
  fact 
  that 
  475, 
  124, 
  and 
  521 
  pages 
  

   are 
  devoted 
  to 
  each 
  of 
  the 
  general 
  subdivisions 
  in 
  the 
  order 
  

   named. 
  In 
  mechanics, 
  the 
  conception 
  of 
  the 
  differential 
  calculus 
  

   is 
  very 
  painstakingly 
  introduced 
  and 
  elementary 
  differential 
  quo- 
  

   tients 
  are 
  subsequently 
  used. 
  The 
  author 
  intends 
  not 
  to 
  avoid 
  

   mathematical 
  and 
  other 
  difficulties 
  but 
  rather 
  to 
  show 
  how 
  these 
  

   difficulties 
  may 
  be 
  overcome 
  by 
  forming 
  correct 
  physical 
  concep- 
  

   tions 
  of 
  the 
  problems 
  under 
  consideration. 
  Furthermore, 
  the 
  

   volume 
  is 
  not 
  designed 
  as 
  a 
  reference 
  book, 
  on 
  the 
  contrary, 
  it 
  is 
  

   prepared 
  only 
  for 
  consecutive 
  reading. 
  To 
  this 
  end 
  no 
  index 
  is 
  

   given 
  although 
  a 
  detailed 
  table 
  of 
  contents 
  is 
  incorporated. 
  The 
  

   text-figures 
  were 
  made 
  from 
  the 
  author's 
  own 
  drawings 
  and 
  hence 
  

   they 
  invoke 
  the 
  precise 
  mental 
  and 
  ocular 
  impressions 
  intended. 
  

   The 
  book 
  is 
  undoubtedly 
  thorough 
  and 
  complete 
  but 
  its 
  unusual 
  

   extent 
  may 
  militate 
  against 
  its 
  usefulness. 
  h. 
  s. 
  u. 
  

  

  11. 
  The 
  Wonders 
  of 
  Wireless 
  Telegraphy 
  ; 
  by 
  J. 
  A. 
  Fleming. 
  

   Pp. 
  xi, 
  279, 
  with 
  54 
  figures. 
  London, 
  1913 
  (Society 
  for 
  Promot- 
  

   ing 
  Christian 
  Knowledge). 
  — 
  This 
  volume 
  is 
  a 
  companion 
  to 
  the 
  

   author's 
  little 
  book 
  on 
  " 
  Waves 
  and 
  Ripples." 
  " 
  The 
  present 
  

  

  