﻿Smithsonian 
  Report 
  1922. 
  — 
  Humphreys. 
  

  

  Plate 
  23. 
  

  

  I. 
  Funnel 
  Cloud 
  (Tornado 
  Cloud), 
  Seen 
  near 
  Elmwood, 
  Nebr. 
  

   April 
  6, 
  1919. 
  

  

  (W. 
  A. 
  Wood, 
  photo.) 
  

  

  2. 
  Funnel 
  Cloud 
  (Tornado 
  Cloud), 
  from 
  Two 
  Exposures 
  Taken 
  

   Close 
  Together, 
  Upper 
  One 
  First, 
  Seen 
  near 
  Elmwood, 
  Nebr., 
  

   April 
  6, 
  1919. 
  

  

  (G. 
  B. 
  Pickwell, 
  photo.) 
  

  

  