﻿Smithsonian 
  Report 
  1922. 
  — 
  Humphreys. 
  

  

  Plate 
  I0. 
  

  

  I. 
  Cumulus 
  and 
  Strato-cumulus, 
  near 
  Gap 
  Mills, 
  W. 
  Va. 
  

  

  (L. 
  W. 
  Humphreys, 
  photo. 
  ) 
  

  

  2. 
  Strato-cumulus, 
  Monterey 
  Bay, 
  Calif. 
  

  

  