_EXPERIMENT VI_
And this also brings into my mind another Experiment that I made about the
production of Blackness, whereof, for Reasons too long to be here deduced,
I expected and found a good Success, an it was this: I took Rectifi'd Oyl
of Vitriol (that I might have the Liquor Clean as well as Strong) and by
degrees mixt with it a convenient proportion of the Essential Oyl, as
Chymists call it, of Wormwood, drawn over with store of Water in a Limbec,
and warily Distilling the mixture in a Retort, there remain'd a scarce
credible quantity of dry Matter, Black as a Coal. And because the Oyl of
Wormwood, though a Chymical Oyl drawn by a _Virtuoso_, seem'd to have
somewhat in it of the Colour of the Plant, I Substituted in its Room, the
Pure and Subtile Essential Oyl of Winter-Savory, and mixing little by
little this Liquor, with (if I mis-remember not) an Equal weight of the
formerly mention'd Rectifi'd Oyl of Vitriol, and Distilling them as before
in a Retort, besides what there pass'd over into the Receiver, even these
two clear Liquors left me a Considerable Proportion, (though not so great
as the two former) of a Substance Black as Pitch, which I yet Keep by me
as a Rarity.
_EXPERIMENT VII.
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