Airships past and present, together with chapters on the use of balloons in connection with meteorology, photography and the carrier pigeon (1908)
Hildebrandt, A. (Alfred), b. 1870, Story, W. H. tr · New York, D. Van Nostrand company · leaf 112
eremade in the course of time, but no success resulted. A man,named Buttenstedt, who was an ardent champion of wingedmachines, had curious ideas which he proposed to put intopractice. He studied the position of the wings during the flightof storks, and developed a wonderful theory relating to… … Fig-. 47.—Diagrams illustrating Mareys theory with reference to theflight of a bird. forced position, natural to flight, as a result of the reaction dueto the upward pressure of the atmosphere on their bodies. Thisstate of tension puts the bird in a position to exercise a certainpressure, which…
Aeronautics
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