﻿Smithsonian 
  Report, 
  1927. 
  — 
  Klemperer 
  

  

  Plate 
  10 
  

  

  1.— 
  One 
  Way 
  of 
  Hauling 
  the 
  Glider 
  Up 
  Hill 
  

  

  2.— 
  ROTATABLE 
  FOOTBALLS 
  AS 
  A 
  LANDING 
  GEAR. 
  (HANOVER) 
  

  

  