of Lead, is look'd upon by them that know no better way of making
_Amanses_, as the grand Work of them all, yet which is an inconvenience
that much blemishes this way, the Calcin'd Lead it self does not only
afford matter to the _Amanses_, but has also as well as other Metals a
Colour of its own, which as I was saying, I have often found to be like
that of _German_ (as many call them) not Eastern Amethysts.

Secondly, That nevertheless this Colour may be easily over-powr'd by those
of divers other Mineral Pigments (if I may so call them) so that with a
glass of Lead, you may Emulate (for Instance) the fresh and lovely
Greenness of an Emerald, though in divers cases the Colour which the Lead
it self upon Vitrification tends to, may vitiate that of the Pigment, which
you would introduce into the Mass.

Thirdly, That so much ev'n these Colours depend upon Texture, that in the
Glass of Lead it self made of about three parts of _Lytharge_ or _Minium_
Colliquated with one of very finely Powder'd Crystal or Sand, we have taken
pleasure to make the mixture pass through differing Colours, as we kept it
more or less in the Fusion. For it was not usually till after a pretty long
Decoction that the Mass attain'd to the Amethystin Colour.

Fourthly and lastly, That the degrees of Coction and other Circumstances
may so vary the Colour produc'd in the same mass, that in a Crucible that
was not great I have had fragments of the same Mass, in some of which
perhaps not so big as a Hazel-Nut, you may discern four distinct Colours.

_Annotation VI._

You may remember (_Pyrophilus_) that when I mention'd the three sorts of
adventitious Colours of Metals, I mention'd them but as the chief, not the