﻿Smithsonian 
  Report 
  1922.— 
  H 
  umphreys. 
  

  

  Plate 
  15. 
  

  

  I. 
  Cumulus 
  Formed 
  by 
  Convection 
  Over 
  Fire, 
  Seen 
  from 
  Mount 
  

  

  Wilson, 
  Calif. 
  

  

  (F. 
  Ellerman, 
  photo.) 
  

  

  2. 
  Cumulus 
  Over 
  Island 
  — 
  Krakatao. 
  

  

  (E. 
  E. 
  Barnard, 
  photo.) 
  

  

  