"Of all the men who attacked the flying problem in the 19th century, Otto 
Lilienthal was easily the most important. ... It is true that attempts at 
gliding had been made hundreds of years before him, and that in the nineteenth 
century, Cayley, Spencer, Wenham, Mouillard, and many othcrs were reported to 
have made feeble attempts to glide, but their failures were so complete that 
nothing of value resulted." Wilbur Wright [2]

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