Famous airmen and their equipment [electronic resource] : with some notes on first-aid in emergencies (1912)
Burroughs Wellcome and Company · London : Burroughs Wellcome · leaf 23
22 THE EVOLUTION OF FLIGHT … was in 1809. In the following year Thomas Walker,of Hull, wrote A treatise upon the art of flyingby mechanical means. These men showed a due appreciation of theproblems of dynamic flight, and when, in 1842, Hensonmade a model flying machine from Cayleys designs,he stood upon the threshold of the…
Aeronautics
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