been abroad in the more freely inlightned Air of the Chamber) I could upon
a light Affriction easily perceive the Stone to Shine.

[35] These were brought in and Read before the Royal Society, (the Day
following) _Oct._ 28. 1663.

[36] _The Stone it self being to be shown to the Royal Society, when the
Observations were deliver'd, I was willing (being in haste) to omit the
Description of it, which is in short, That it was a Flat or Table
Diamond, of about a third part of an Inch in length, and somewhat less in
breadth, that it was a Dull Stone, and of a very bad Water, having in the
Day time very little of the Vividness of ev'n ordinary Diamonds, and
being Blemished with a whitish Cloud about the middle of it, which
covered near a third part of the Stone._

[37] _Hast made me forget to take notice that I went abroad the same
Morning, the Sun shining forth clear enough, to look upon the Diamond
though a_ Microscope, _that I might try whether by that Magnifying Glass
any thing of peculiar could be discern'd in the Texture of the Stone, and
especially of the whitish Cloud that possest a good part of it. But for
all my attention I could not discover any peculiarity worth mentioning._

Secondly, The Candles being removed, I could not in a Dark place discern
the Stone to have any Light, when I looked on it, without having Rubb'd or
otherwise prepar'd it.

Thirdly, By two white Pibbles though hard Rubb'd one against another, nor
by the long and vehement Affriction of Rock Crystal against a piece of Red
cloath, nor yet by Rubbing two Diamonds set in Ring, as I had Rubb'd this
Stone, I could produce any sensible degree of Light.