the help of a Blew and Yellow, that were both of them Emphatical.

8. Wherefore we will proceed to take notice, that we also devis'd a way of
trying whether or no Metalline Solutions though one of them at least had
its Colour Adventitious, by the mixture of the _Menstruum_ employ'd to
dissolve it, might not be made to compound a Green after the manner of
other Bodies. And though this seem'd not easie to be perform'd by reason of
the Difficulty of finding Metalline Solutions of the Colour requisite, that
would mix without Præcipitating each other; yet after a while having
consider'd the matter, the first Tryal afforded me the following
Experiment. I took a High Yellow Solution of good Gold in _Aqua-Regis_,
(made of _Aqua-fortis_, and as I remember half its weight of Spirit of
Salt) To this I put a due Proportion of a deep and lovely Blew Solution of
Crude Copper, (which I have elsewhere taught to be readily Dissoluble in
strong Spirit of Urine) and these two Liquors though at first they seem'd a
little to Curdle one another, yet being throughly mingl'd by Shaking, they
presently, as had been Conjectur'd, united into a Transparent Green Liquor,
which continu'd so for divers days that I kept it in a small Glass wherein
'twas made, only letting fall a little Blackish Powder to the Bottom. The
other _Phænomena_ of this Experiment belong not to this place, where it may
suffice to take notice of the Production of a Green, and that the
Experiment was more than once repeated with Success.

9. And lastly, to try whether this way of compounding Colours would hold
ev'n in Ingredients actually melted by the Violence of the Fire, provided
their Texture were capable of safely induring Fusion, we caus'd some Blew
and Yellow Ammel to be long and well wrought together in the Flame of a
Lamp, which being Strongly and Incessantly blown on them kept them in some
degree of Fusion, and at length (for the Experiment requires some Patience
as well as Skil) we obtain'd the expected Ammel of a Green Colour.