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).
1119.
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.]
1120.
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 direct connection with the problem as stated in words.—Compare No. 1448, l. 17.]
1121.
A definition as to why a man who slides on ice does not fall. [Footnote: An indistinct sketch accompanies the passage, in the original.]
On Flying machines (1122-1126).
1122.
Man