﻿Smithsonian 
  Report 
  1922. 
  — 
  Ames. 
  

  

  Plate 
  I. 
  

  

  Airship, 
  Filled 
  with 
  Hydrogen. 
  Engines 
  and 
  Propellers; 
  Eleva- 
  

   tors 
  and 
  Rudder; 
  Stabilizing 
  Surfaces. 
  

  

  Airplane. 
  Wings, 
  Fuselage, 
  Ailerons, 
  Elevator, 
  Rudder, 
  etc. 
  

  

  