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.
Fourthly, I found this Diamond hard enough, not only to enable me to write
readily with it upon Glass, but to Grave on Rock Crystal it self.
Fifthly, I found this to have like other Diamonds, an Electrical
faculty.[38]
[38] V. _For it drew light Bodies like Amber, Jet, and other Concretes
that are noted to do so; But its attractive power seem'd inferiour to
theirs._
Sixthly, Being rubb'd upon my Cloaths, as is usual for the exciting of
Amber, Wax, and other Electrical Bodies, it did in the Dark manifestly
shine like Rotten Wood, or the Scales of Whitings, or other putrified Fish.
Seventhly, But this Conspicuousness was Fainter than that of the Scales,
and Slabber (if I may so call it) of Whitings, and much Fainter than the
Light of a Glow-worm, by which I have been sometimes able to Read a short
Word, whereas after an ordinary Affriction of this Diamond I was not able
to discern distinctly by the Light of it any of the nearest Bodies: And
this Glimmering also did very manifestly and considerably Decay presently
upon the ceasing of the Affriction, though the Stone continued Visible some
while after.
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