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the same figure, somewhat altered. 6. La canna dell' aria. Compare
Vol. I. No. I. Note]
On the gravity of water.
1
118.
If the weight of the sea bears on its bottom, a man, lying on that
bottom and having l000 braccia of water on his back, would have
enough to crush him.
Diving apparatus and Skating (1119-1121).
1
119.
Of walking under water. Method of walking on water.
[Footnote: The two sketches belonging to this passage are given by
AMORETTI, Memorie Storiche. Tav. II, Fig. 3 and 4.]
1
120.
Just as on a frozen river a man may run without moving his feet, so
a car might be made that would slide by itself.
[Footnote: The drawings of carts by the side of this text have no
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