﻿Smithsonian 
  Report, 
  1927. 
  — 
  Klemperer 
  

  

  Plate 
  

  

  1.— 
  Warping 
  Wings. 
  (Harth) 
  

  

  2.— 
  Tailless 
  Glider. 
  (Leusch) 
  

  

  