The sea wave takes nothing away from its shores. All things that are left free within the sea, the sea casts to its shores. The surface of the water keeps for a while the impression of its waves.

The wave that comes to shore with incident motion carries within it the impression of the reflected motion. The breaking of the waves near the sea shores arises from the encounter that the wave's incident motion makes with its reflected motion.

[editorial note: after 'leva' a cancelled 'l' follows.]

n, p, a, q m b, r, o, c

If the wind a-b strikes at b with the arched wave n m o, that wave rebounds from b to c with the arched wave p q r. And the surface of such water remains latticed (graticulated).

a, b, e, f t, c

The latticing of the water's surface is made of as many lines as there are lines that rebound from the places struck by the incident motion of the water. That is to say, a-b strikes at b and rebounds at c. All the arcs of the waves take their centre from b, and the wave e-t that strikes at t rebounds at t and makes new arcs.