﻿Smithsonian 
  Report, 
  1927. 
  — 
  Klemperer 
  

  

  Plate 
  4 
  

  

  1.— 
  Glider 
  Under 
  Construction 
  at 
  Aachen 
  College 
  

  

  2.— 
  A 
  Gull-like 
  Design. 
  (Aachen) 
  

  

  