﻿Rain, 
  Wind, 
  and 
  Cyclones. 
  231 
  

  

  the 
  time 
  of 
  its 
  formation. 
  Dines* 
  remarks: 
  "The 
  inference 
  

   drawn 
  is 
  that 
  a 
  cyclone 
  is 
  produced 
  by 
  the 
  withdrawal 
  

   laterally 
  of 
  the 
  air 
  at 
  a 
  height 
  of 
  from 
  8 
  to 
  10 
  kilometres 
  ; 
  

   for 
  if 
  we 
  choose 
  this 
  height 
  the 
  observed 
  and 
  the 
  theoretical 
  

  

  Fig. 
  6. 
  

  

  iSkwv 
  

  

  iGfaa- 
  

  

  5 
  to* 
  

  

  ooo 
  miles 
  

  

  woofifiLes* 
  

  

  variations 
  of 
  pressure 
  and 
  temperature 
  agree, 
  whereas 
  they 
  

   would 
  not 
  do 
  so 
  if 
  any 
  other 
  height 
  were 
  chosen 
  for 
  the 
  

   outflow 
  of 
  the 
  air 
  which 
  undoubtedly 
  flows 
  in 
  along 
  the 
  

   earth's 
  surface." 
  My 
  suggestion 
  is 
  that 
  the 
  air 
  does 
  not 
  

   flow 
  outwards 
  from 
  the 
  cyclone 
  in 
  any 
  volume 
  anywhere 
  

   except 
  where 
  a 
  corresponding 
  volume 
  enters 
  somewhere 
  else; 
  

   there 
  being, 
  as 
  regards 
  horizontal 
  flow 
  to 
  or 
  from 
  the 
  centre, 
  

   above 
  2000 
  or 
  3000 
  feet 
  — 
  except 
  at 
  very 
  great 
  heights, 
  — 
  

   a 
  balance 
  maintained 
  between 
  incoming 
  and 
  outgoing 
  air. 
  

  

  * 
  Met. 
  Office 
  Pub. 
  2106, 
  p. 
  50. 
  

  

  