And when the Corpuscles of the Pigment seem'd to have equally
diffus'd themselves through the whole Liquor, I then by putting two or
three drops of Spirit of Salt, first made an odd change in the Colour of
the Liquor, as well as a visible commotion among its small parts, and in a
short time chang'd it wholly into a very Glorious Yellow, like that of a
Topaz. After which if I let fall a few drops of the strong and heavy
Solution of Pot-ashes, whose weight would quickly carry it to the sharp
bottome of the Glass, there would soon appear four very pleasant and
distinct Colours; Namely, a Bright, but Dilute Colour at the picked bottome
of the Glass; a Purple, a little higher; a deep and glorious Crimson,
(which Crimson seem'd to terminate the operation of the Salt upward) in the
confines betwixt the Purple and the Yellow; and an Excellent Yellow, the
same that before enobled the whole Liquor, reaching from thence to the top
of the Glass. And if I pleas'd to pour very gently a little Spirit of Sal
Armoniack, upon the upper part of this Yellow, there would also be a Purple
or a Crimson, or both, generated there, so that the unalter'd part of the
Yellow Liquor appear'd intercepted betwixt the two Neighbouring Colours.
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