﻿Smithsonian 
  Report, 
  1927. 
  — 
  Klemperer 
  

  

  Plate 
  7 
  

  

  1.— 
  A 
  Typical 
  Light 
  Plane 
  of 
  Glider 
  Descent 
  

  

  2.— 
  A"Flapper" 
  Experiment. 
  (Zeise) 
  

  

  