Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 71
24 feet high, he can throw himself from any great height without damage tohimself. (Parachute) Ms CA Fol aSiva Try whkh is greater in its effect, the weight of a man or the push of hislegs. Ms Codice Sul Volo Degli Uccelli 17 [16] r I have divided the Treatise on Birds into four books: of which the… … v^i Flying ma:h:nj :^iid details of construction. such as that of birds, bats, fishes, animals and insects; the last of the mechanism:of this movement. AIs K Fol 3r July, 1921.] Leonardo da Vinci, 63 When the bird lowers one of its wings necessity constrains it instantly toextend it, for if it did…
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