That either of those new Pigments (if I may so call them)
may by the Affusion of enough of a contrary Liquor, be presently chang'd
from Red into Green, and from Green into Red, which Observation will hold
also in Syrrup of Violets, Juices of Blew-bottles, &c.

_Annotation._

After what I have formerly deliver'd to evince, That there are many
Instances, wherein new Colours are produc'd or acquir'd by Bodies, which
_Chymists_ are wont to think destitute of Salt, or to whose change of
Colours no new Accession of Saline Particles does appear to contribute, I
think we may safely enough acknowledge, that we have taken notice of so
many Changes made by the Intervention of Salts in the Colours of Mix'd
Bodies, that it has lessen'd our Wonder, That though _many Chymists_ are
wont to ascribe the Colours of Such Bodies to their Sulphureous, and _the
rest_ to their Mercurial Principle; yet _Paracelsus_ himself directs us in
the Indagation of Colours, to have an Eye principally upon Salts, as we
find in that passage of his, wherein he takes upon him to Oblige his
Readers much by Instructing them, of what things they are to expect the
Knowledge from each of the three distinct Principles of Bodies. _Alias_
(says he) _Colorum similis ratio est: De quibus brevem institutionem hanc
attendite, quod scilicet colores omnes ex Sale prodeant. Sal enim dat
colorem, dat Balsamum._[19] And a little beneath. _Iam natura Ipsa colores
protrathit ex sale, cuique speciei dans illum, qui ipsi competit_, &c.
After which he concludes; _Itaque qui rerum omnium corpora cognoscere vult,
huic opus est, ut ante omnia cognoscat Sulphur, Ab hoc, qui desiderat
novisse Colores is scientiam istorum petat a Sale, Qui scire vult Virtutes,
is scrutetur arcana Mercurii. Sic nimirum fundamentum hauserit Mysteriorum,
in quolibet crescenti indagandorum, prout natura cuilibet speciei ea
ingessit_. But though _Paracelsus_ ascribes to each of his belov'd
Hypostatical Principles, much more than I fear will be found to belong to
it; yet if we please to consider Colours, not as _Philosophers_, but as
_Dyers_, the concurrence of Salts to the striking and change of Colours,
and their Efficacy, will, I suppose, appear so considerable, that we shall
not need to quarrel much with _Paracelsus_, for ascribing in this place
(for I dare not affirm that he uses to be still of one Mind) the Colours of
Bodies to their Salts, if by Salts he here understood, not only Elementary
Salts, but