NO. .*'> LANGLE1 MEMOIR OS MECHANICAL FLIGH1 L87 



ing increased weight may be added in proport ion to the skill acquired ; and there 

 is no doubt that man will acquire this skill with marvelous rapidity, approach 

 ing, if not equaling, thai exhibited by him in the use of the bicycle, which, 

 when first ridden, requires not only all of the rider's skill hut thai of a couple 

 of assistants, but when once mastered requires hardly more thought for its 

 proper manipulation than even the act of walking involves, the balancing ami 

 guiding being" done intuitively merely by the motion of the body and with prac- 

 tically no exertion. 



