.

2. We also learn'd in the Dye-houses, that Cloth being Dy'd Blew with Woad,
is afterwards by the Yellow Decoction of _Luteola_ or Woud-wax or Wood-wax
Dy'd into a Green Colour.

3. You may also remember what we above Related, where we intimated, that
having in a Darkn'd Room taken two Bodies, a Blew and a Yellow, and cast
the Light Reflected from the one upon the other, we likewise obtain'd a
Green.

4. And you may remember, that we observ'd a Green to be produc'd, when in
the same Darkn'd Room we look'd at the Hole at which alone the Light
enter'd, through the Green and Yellow parts of a sheet of Marbl'd Paper
laid over one another.

5. We found too, that the Beams of the Sun being trajected through two
pieces of Glass, the one Blew and the other Yellow, laid over one another,
did upon a sheet of White paper on which they were made to fall, exhibit a
lovely Green.

6. I hope also, that you have not already forgot, what was so lately
deliver'd, concerning the composition of a Green, with a Blew and Yellow;
of which most Authors would call the one a _Real_, and the other an
_Emphatical_.

7. And I presume, you may have yet fresh in your memory, what the
fourteenth Experiment informs you, concerning the exhibiting of a Green, by
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 Praecipitating 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 k