And this brings
into my Mind, that having taken a Flat and Bright piece of Gold, that was
Refin'd by a Curious and Skilfull Person on purpose to Trye to what height
of Purity Gold could be brought by Art, I found that this very piece, as
Glorious as it look'd, being rubb'd a little upon a piece of fine clean
Linnen, did sully it with a kind of Black; and the like I have observ'd in
Refin'd Silver, which I therefore mention, because I formerly suspected
that the Impurity of the Metall might have been the only Cause of what I
have divers times obferv'd in wearing Silver-hilted Swords, Namely, that
where they rubb'd upon my Clothes, if they were of a Light-Colour'd Cloath,
the Affriction would quickly Black them; and Congruously hereunto I have
found Pens Blackt almost all over, when I had a while carri'd them about me
in a Silver Ink-case. To which I shall only add, that whereas in these
several Instances of Denigration, the Metalls are worn off, or otherwise
Reduc'd into very Minute Parts, that Circumstance may prove not Unworthy
your Notice.
_EXPERIMENT X._
That a Solution of Silver does Dye Hair of a Black Colour, is a Known
Experiment, which some persons more Curious than Dextrous, have so
Unluckily made upon themselves as to make their Friends very Merry.
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