﻿444 
  Scientific 
  Intelligence. 
  

  

  found 
  for 
  A43680, 
  of 
  the 
  doublet 
  principal 
  series, 
  and 
  for 
  

   A39470, 
  of 
  the 
  triplet 
  principal 
  series. 
  

  

  Three 
  lines 
  of 
  the 
  triplet 
  second 
  subordinate 
  series 
  were 
  inves- 
  

   tigated! 
  Probably 
  due 
  to 
  inadequate 
  dispersion 
  in 
  the 
  red, 
  the 
  

   line 
  A6455 
  showed 
  no 
  sensible 
  shift. 
  The 
  lines 
  A5436 
  and 
  A5109-5 
  

   were 
  not 
  resolved 
  into 
  triplets 
  but, 
  when 
  treated 
  as 
  singlets, 
  they 
  

   were 
  displaced 
  toward 
  the 
  red 
  bv 
  about 
  +1-6 
  A. 
  XL 
  and 
  +3-7 
  

   A. 
  XL, 
  respectively, 
  corresponding 
  to 
  a 
  gradient 
  of 
  8 
  X 
  10 
  4 
  volts 
  

   per 
  cm. 
  For 
  each 
  line 
  the 
  p- 
  and 
  s-components 
  suffered 
  the 
  

   same 
  displacement. 
  The 
  author 
  concludes 
  that 
  the 
  three 
  lines 
  

   of 
  the 
  second 
  subordinate 
  series 
  experience 
  displacements 
  which 
  

   increase 
  as 
  the 
  term 
  number 
  becomes 
  larger, 
  and 
  that 
  this 
  series 
  

   of 
  oxygen 
  behaves 
  in 
  all 
  respects 
  in 
  precisely 
  the 
  same 
  manner 
  

   as 
  the 
  corresponding 
  series 
  of 
  helium 
  and 
  parhelium. 
  

  

  In 
  the 
  spectral 
  region 
  studied, 
  three 
  lines 
  of 
  the 
  triplet 
  first 
  

   subordinate 
  series 
  were 
  observed. 
  For 
  the 
  line 
  A6157, 
  SA 
  was 
  

   about 
  -f- 
  3 
  A. 
  U. 
  for 
  the 
  p-component, 
  and 
  + 
  2-5 
  A. 
  U. 
  for 
  the 
  

   s-component, 
  (gradient 
  = 
  7 
  X 
  10 
  4 
  ). 
  Yoshida 
  attributes 
  this 
  

   lack 
  of 
  equality 
  to 
  experimental 
  error. 
  The 
  lines 
  A5329-5 
  and 
  

   A4968-5 
  had 
  each 
  the 
  same 
  shift 
  for 
  the 
  p- 
  and 
  s-components. 
  

   For 
  the 
  field 
  8-16 
  X 
  10 
  4 
  volts 
  per 
  cm., 
  the 
  mean 
  of 
  the 
  p- 
  and 
  

   s-displacements 
  for 
  the 
  resolved 
  components 
  of 
  the 
  triplets 
  were 
  

   —15-8, 
  + 
  2-6, 
  + 
  16-4, 
  and 
  —301, 
  —108, 
  +9-2, 
  and 
  A4968-5 
  and 
  

   A5329-5, 
  in 
  the 
  order 
  named. 
  

  

  "Each 
  of 
  the 
  lines 
  5329-5 
  and 
  4968-5 
  A. 
  XL 
  of 
  the 
  first 
  sub- 
  

   ordinate 
  triplet 
  series 
  has 
  two 
  isolated 
  components 
  respectively 
  

   in 
  its 
  immediate 
  violet 
  side. 
  The 
  isolation 
  of 
  the 
  said 
  compo- 
  

   nents 
  becomes 
  smaller 
  as 
  the 
  term 
  number 
  of 
  the 
  series 
  increases. 
  

   This 
  is 
  exactly 
  similar 
  to 
  that 
  of 
  the 
  isolated 
  components 
  of 
  

   helium 
  and 
  parhelium." 
  — 
  Mem. 
  Coll. 
  sci. 
  Kyoto, 
  3, 
  287, 
  1919. 
  

  

  8. 
  The 
  Principles 
  Underlying 
  Radio 
  Communication. 
  

   (Radio 
  Pamphlet 
  No. 
  40, 
  Signal 
  Corps, 
  XL 
  S. 
  Army.) 
  Pp. 
  355, 
  

   with 
  268 
  figures. 
  Washington, 
  1919 
  (Government 
  Printing 
  

   Office). 
  — 
  This 
  volume 
  was 
  prepared 
  primarily 
  to 
  facilitate 
  the 
  

   intensive 
  training 
  given 
  to 
  classes 
  in 
  radio 
  communication 
  dur- 
  

   ing 
  the 
  later 
  part 
  of 
  the 
  world 
  war. 
  Since 
  many 
  of 
  the 
  members 
  

   of 
  these 
  classes 
  had 
  not 
  had 
  adequate 
  preliminary 
  training 
  in 
  

   electricity, 
  magnetism, 
  and 
  electromagnetism 
  it 
  was 
  found 
  nec- 
  

   essary 
  to 
  introduce 
  each 
  branch 
  of 
  the 
  subject 
  in 
  a 
  very 
  elemen- 
  

   tary 
  manner. 
  The 
  scope 
  of 
  the 
  text 
  may 
  be 
  inferred 
  from 
  the 
  

   titles 
  of 
  the 
  six 
  chapters, 
  which 
  are: 
  1 
  Elementary 
  Electricity, 
  

   2 
  Dynamo-Electric 
  Machinery, 
  3 
  Radio 
  Circuits, 
  4 
  Electromag- 
  

   netic 
  Waves, 
  5 
  Apparatus 
  for 
  Transmission 
  and 
  Reception 
  

   ( 
  Exclusive 
  of 
  Vacuum 
  Tubes), 
  6 
  Vacuum 
  Tubes 
  in 
  Radio 
  Com- 
  

   munication. 
  

  

  Judged 
  from 
  the 
  points 
  of 
  view 
  of 
  clearness 
  of 
  presentation 
  

   and 
  of 
  wisdom 
  in 
  the 
  selection 
  of 
  material, 
  much 
  credit 
  is 
  due 
  

   to 
  the 
  six 
  collaborators 
  upon 
  whom 
  fell 
  the 
  difficult 
  task 
  of 
  pre- 
  

  

  

  