For by
this we may guess, what it is chiefly that made the Body White before, by
considering that all that was done to deprive it of that Whiteness, was
only to Depress the Little Protuberances that were before on the Surface of
the Silver into one Continu'd Superficies, and thereby effect this, that
now the Image of the Lucid Body, and consequently a Kind of Whiteness shall
appear to your Eye, but in some place of the greater Silver Looking-glass
(whence the Beams reflected at an Angle Equal to that wherewith they fall
on it, may reach your Eye) whilst the Asperity remain'd Undestroy'd, the
Light falling on innumerable Little _Specula_ Obverted some one way, and
some another, did from all Sensibly Distinguishable parts of the
Superficies reflect confus'd Beams or Representations of Light to the
Beholders Eye, from whence soever he chance to Look upon it. And among the
Experiments annex'd to this Discourse, you will find One, wherein by the
Change of Texture in Bodies, Whiteness is in a Trice both Generated and
Destroy'd.
* * * * *
CHAP. II.
1. What we have Discours'd of Whiteness, may somewhat Assist us to form a
Notion of Blackness, those two Qualities being Contrary enough to
Illustrate each other.
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