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the moon is of the nature of a mirror, and that consequently the
light is not produced by the innumerable multitude of the waves of
that sea, which I declared to be the portion of the moon which is
illuminated by the solar rays.
Let o p be the body of the sun, c n s the moon, and b the eye
which, above the base c n of the cathetus c n m, sees the body
of the sun reflected at equal angles c n; and the same again on
moving the eye from b to a. [Footnote: The large diagram on the
margin of page 161 belongs to this chapter.]
Explanation of the lumen cinereum in the moon.
9
02.
OF THE MOON.
No solid body is less heavy than the atmosphere.
[Footnote: 1. On the margin are the words tola romantina,
tola--ferro stagnato (tinned iron); romantina is some special
kind of sheet-iron no longer known by that name.]
Having proved that the part of the moon that shines consists of
water, which mirrors the body of the sun and reflects the radiance
it receives from it; and that, if these waters were devoid of waves,
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