﻿Rain, 
  Wind, 
  and 
  Cyclones. 
  

  

  223 
  

  

  central 
  portion 
  of 
  a 
  depression. 
  If 
  such 
  were 
  the 
  case, 
  the 
  

   greatest 
  rainfall 
  would 
  occur 
  around 
  the 
  centre. 
  But 
  it 
  does 
  

   not 
  often 
  do 
  so. 
  The 
  greatest 
  rainfall 
  is 
  generally 
  on 
  one 
  

   of 
  its 
  sides, 
  and 
  considered 
  with 
  regard 
  to 
  the 
  direction 
  in 
  

   which 
  the 
  cyclone 
  is 
  moving, 
  not 
  always 
  on 
  the 
  same 
  side. 
  

   However, 
  we 
  may 
  safely 
  conclude 
  that 
  the 
  area 
  over 
  which 
  

   rain 
  is 
  falling 
  is 
  that 
  above 
  which 
  the 
  air 
  is 
  rising, 
  and 
  this 
  

   fact, 
  considered 
  in 
  the 
  light 
  of 
  the 
  directions 
  of 
  the 
  wind 
  on 
  

  

  Fig. 
  1. 
  

  

  the 
  earth's 
  surface 
  at 
  the 
  time, 
  throws 
  light 
  upon 
  some 
  points 
  

   in 
  the 
  construction 
  of 
  the 
  upper 
  portion 
  of 
  the 
  cyclone 
  which 
  

   might 
  otherwise 
  be 
  obscure. 
  

  

  A 
  very 
  obvious 
  case 
  of 
  a 
  rising 
  wind 
  producing 
  rain, 
  

   without 
  any 
  marked 
  barometric 
  changes, 
  is 
  described 
  by 
  

   Shaw 
  and 
  Lempfert*. 
  The 
  wind 
  directions 
  are 
  shown 
  in 
  

   fig. 
  1. 
  Here 
  we 
  have 
  a 
  wind 
  from 
  the 
  south-west 
  blowing 
  

   against 
  one 
  coming 
  from 
  a 
  little 
  west 
  of 
  south 
  ; 
  the 
  line 
  

  

  * 
  Meteorological 
  Office 
  Publication 
  No. 
  174, 
  p. 
  62. 
  

   R2 
  

  

  

  