﻿Smithsonian 
  Report 
  1922. 
  — 
  Humphreys. 
  

  

  Plate 
  II 
  

  

  I. 
  Lenticular 
  Cloud 
  (Cumulus 
  Lenticularis). 
  

  

  (C. 
  F. 
  Brooks, 
  photo.) 
  

  

  2. 
  Lenticular 
  Cloud, 
  Over 
  Mount 
  Shasta. 
  

  

  ( 
  A. 
  Gilchrist, 
  photo.) 
  

  

  