made Green by this Essence, I dropp'd an Alcalizate Solution, or Urinous
Spirit, the Wine would presently grow Turbid, and of an odd Dirty Colour;
But if instead of dissolving the Essence in Wine, I dissolv'd it in fair
Water sharpen'd perhaps with a little Spirit of Salt, then either the
Urinous Spirit of Sal Armoniack, or the solution of the fix'd Salt of
Pot-ashes would immediately turn it of a Yellowish Colour, the fix'd or
Urinous Salt Precipitating the Vitriolate substance contain'd in the
Essence. But here I must not forget to take notice of a circumstance that
deserves to be compar'd with some part of the foregoing Experiment, for
whereas our Essence imparts a Greenness to Wine, but not to Water, the
Industrious _Olaus Wormius_[23] in his late _Musæum_ tells us of a rare
kind of Turn-Sole which he calls _Bezetta Rubra_ given him by an Apothecary
that knew not how it was made, whose lovely Redness would be easily
communicated to Water, if it were immers'd in it; but scarce to Wine, and
not at all to Spirit of Wine, in which last circumstance it agrees with
what I lately told you of our Essence, notwithstanding their disagreement
in other particulars.

[23] Libr. 2do Cap. 34.

_EXPERIMENT XLVI._

We have often taken notice, as of a remarkable thing, that Metalls as they
appear to the Eye, before they come to be farther alter'd by other Bodyes,
do exhibit Colours very different from those which the Fire and the
_Menstruum_, either apart, or both together, do produce in them; especially
considering that these Metalline Bodyes are after all these disguises
reducible not only to their former Metalline Consistence and other more
radical properties, but to their Colour too, as if Nature had given divers
Metalls to each of them a double Colour, an _External_, and an _Internal_;