X 



CONTENTS. 



PAGE 



Necessity for supplying the roots of artificial wings with elastic 

 structures in imitation of the muscles and elastic ligaments 

 of flying animals, ...... 247 



The artificial wave wing can be driven at any speed — it can 



make its own currents or utilize existing ones, . .251 

 Compound rotation of the artificial wave wing. The difi'erent 



parts of the wing travel at different speeds, . . 252 



How the wave wing creates currents and rises upon them, and 



how the air assists in elevating the wing, . . 253 



The artificial wing propelled at various degrees of speed during 



the down and up strokes, ..... 255 



The artificial wave wing as a propeller, . . . 256 



A new form of aerial screw, ..... 256 



The aerial wave screw operates upon water, . . . 257 



The sculling action of the wing, . . , ,231 



Concluding Remarks, . . . • .258 



