People were to be seen eagerly embarking victuals on various kinds
of hastily made barks. But little of the waves were visible in those
places where the dark clouds and rain were reflected.

But where the flashes caused by the bolts of heaven were reflected,
there were seen as many bright spots, caused by the image of the
flashes, as there were waves to reflect them to the eye of the
spectator.

The number of the images produced by the flash of lightning on the
waves of the water were multiplied in proportion to the distance of
the spectator's eye.

So also the number of the images was diminished in proportion as
they were nearer the eye which saw them [Footnote 22. 23: _Com'e
provato_. See Vol. II, Nos. 874-878 and 892-901], as it has been
proved in the definition of the luminosity of the moon, and of our
marine horizon when the sun's rays are reflected in it and the eye
which receives the reflection is remote from the sea.

VI.

THE ARTIST'S MATERIALS.

Of chalk and paper (612--617).