Experiments, which he had tryed many years ago, because he since found them
divulged by persons from whom he had not the least hint of them; which yet
is not touched, with design to reflect upon any Ingenious Man, as if he
were a Plagiary: For, though our Generous Author were not reserved enough
in showing his Experiments to those that expressed a Curiosity to see them
(amongst whom a very Learned Man hath been pleased publickly to acknowledge
it several years ago[2]; yet the same thing may be well enough lighted on
by persons that know nothing of one another. And especially Chymical
Laboratories may many times afford the same _Phænomenon_ about Colours to
several persons at the same or differing times. And as for the few
_Phænomena_ mentioned in the same Chymical writers, as well as in the
following Treatise, our Author hath given an account, why he did not
decline rejecting them, in the Anotations upon the 47th Experiment of the
third part. Not here to mention, what he elsewhere saith, to shew what use
may be Justifiably made of Experiments not of his own devising by a writer
of Natural History, if, what he employes of others mens, be well examined
or verified by himself.

[2] He that desires more instances of this kind and matter, that
according to this doctrine may much help the Theory of colours, and
particularly the force both of Sulphureous and volatile, is likewise of
Alcalizate and Acid Salts, and in what particulars, Colours likely depend
not in the causation from any Salt at all, may beg his information from
M. Boyle who hath some while since honoured me with the sight of his
papers concerning this subject, containing many excellent experiments,
made by him for the Elucidation of this doctrine, &c Dr. R. Sharrock in
his ingenious and usefull History of the Propagation and Improvement of
Vegetables, published in the yeare 1660.

In the mean time, this Treatise is such, that there needs no other