FL YING-MA CHINES. 1 7 



-would be likely to act somewhat like four screw-propellers, one behind 

 the other, on an ocean-steamer. The mechanism was to be driven by 

 a steam-engine. The dark object suspended below may be ballast to 

 counteract any superfluous energy of the steam. 



Fig. 5.— Landell's Flying-Machine. 



In 1868 Mr. Stringfellow built and exhibited a model of a flying- 

 machine at the Crystal Palace, in London, where it took a prize. 

 There are three aero-planes, one above the other, with a broad tail 

 behind. As in Henson's machine, no provision was made for lifting it 



Fig. 6.— Stringfeixow's Flyxng-Machute. 



from the ground, the power being applied simply to produce or keep 

 up horizontal velocity, the reaction of the air against the inclined 

 planes serving to sustain the weight. 



At the exhibition the model ran down an inclined wire, but re- 

 fused to rise into the air. It weighed only twelve pounds, including 

 VOL. xxriii. — 2 



