Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 73
_ -. -- V , - ■ ■ ■ … ■^-.tii Helicopter. painter, but as an author, a philosopher and a naturalist. There can be no doubtthat in more than one department his principles and discoveries were infinitely July, 1921.] Leonardo da Vinci. 65 more in accord with the teachings of modern science than with the views ofhis…
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