Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 69
against the wind. The sketches of the posi-tion of the body wings and tails of birds and insects in flight andtheir successive positions and warping of the wings show a keen-ness and accuracy of observation all the more remarkable in theabsence of that most efficient modern aid to similar… … ,J Flymy machine wings. wings operated by a powerful spring motor of which the construc-tion appears clearly indicated with its bow springs, pulleys, counter-shaft, and even a speed regulator in the form of a fly-ball gover-nor. It would appear that the operator was to stand verticallybetween the…
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