﻿654 
  

  

  Messrs. 
  E. 
  Bellini 
  and 
  A. 
  Tosi 
  on 
  a 
  

  

  In 
  the 
  case 
  of 
  fig. 
  13 
  the 
  phase 
  displacement 
  was 
  obtained 
  

   by 
  inserting 
  an 
  excess 
  of 
  self-inductance 
  in 
  one 
  or 
  other 
  of 
  

   the 
  aerial 
  circuits 
  ; 
  in 
  the 
  arrangements 
  of 
  figs. 
  14 
  and 
  15 
  

  

  Fio-. 
  15. 
  

  

  the 
  shift 
  of 
  phase 
  was 
  produced 
  automatically 
  when 
  the 
  

   circuits 
  were 
  all 
  carefully 
  tuned, 
  but 
  the 
  arrangement 
  of 
  fig. 
  14 
  

   is 
  preferable 
  owing 
  to 
  its 
  simplicity, 
  rapidity, 
  and 
  certainty 
  

   of 
  operation. 
  In 
  this 
  case, 
  as 
  can 
  be 
  seen 
  from 
  the 
  figure, 
  

   the 
  vertical 
  antenna 
  is 
  joined 
  to 
  one 
  end 
  of 
  the 
  secondary 
  

   circuit 
  of 
  the 
  receiving 
  radiogoniometer, 
  through 
  a 
  self- 
  

   inductance 
  S 
  ; 
  the 
  other 
  end 
  of 
  the 
  secondary 
  is 
  earthed 
  

   through 
  the 
  detector 
  R. 
  The 
  working 
  of 
  the 
  arrangement 
  

   is 
  very 
  simple, 
  since 
  it 
  only 
  requires 
  the 
  tuning 
  of 
  the 
  two 
  

   circuits 
  as 
  in 
  ordinary 
  cases 
  of 
  circular 
  reception. 
  The 
  

   diagrams 
  of 
  the 
  reception 
  were 
  obtained 
  in 
  the 
  same 
  way 
  as 
  

   those 
  of 
  the 
  transmission, 
  by 
  means 
  of 
  the 
  thermo- 
  

   galvanometer 
  in 
  place 
  of 
  the 
  detector, 
  and 
  by 
  turning 
  the 
  

   movable 
  secondary 
  of 
  the 
  receiving 
  radiogoniometer, 
  the 
  

   transmitting 
  station 
  being 
  fixed. 
  The 
  curve 
  of 
  fig. 
  16 
  in 
  

   particular 
  was 
  obtained 
  by 
  means 
  of 
  the 
  arrangement 
  shown 
  

   in 
  fig. 
  13 
  ; 
  the 
  curve 
  of 
  fig. 
  17 
  (p. 
  656) 
  by 
  that 
  of 
  fig. 
  15 
  ; 
  

   and 
  the 
  curve 
  of 
  fig. 
  18 
  (p. 
  656) 
  by 
  the 
  arrangement 
  of 
  fig. 
  14. 
  

   The 
  arrangements 
  have 
  always 
  enabled 
  the 
  sense 
  of 
  the 
  

   received 
  transmissions 
  to 
  be 
  determined, 
  and 
  in 
  many 
  cases 
  

   to 
  get 
  no 
  reception 
  when 
  the 
  pointer 
  of 
  the 
  movable 
  coil 
  of 
  

  

  