doubt of your comprehending the whole Art: Yet if I should not disclose to
You, that the Vessels, that immediately contain the Tinging Ingredients,
are to be made of or to be lin'd with Tin, You would never be able by all
that I could tell you else (at-least, if the Famousest and Candidest
Artificers do not strangely delude themselves) to bring your Tincture of
Chochinele to Dye a perfect Scarlet. So much depends upon the very Vessel,
wherein the Tinging matters are boyl'd, and so great an Influence may an
unheeded Circumstance have on the Success of Experiments concerning
Colours.

* * * * *

_FINIS._

* * * * *

A SHORT
ACCOUNT
OF SOME
OBSERVATIONS
Made by Mr. _BOYLE_

About a _Diamond_ that _Shines_ in the Dark.

First enclosed in a Letter written to
a Friend,

And now together with it annexed to the Foregoing
Treatise, upon the score of the
Affinity Betwixt