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
invitation to peruse it, but that tis composed by one of the Deepest & Most
indefatigable searchers of Nature, which, I think the World, as far as I
know it, affords. For mine own part, I feel a Secret Joy within me, to see
such beginings upon such _Themes_, it being demonstratively true, _Mota
facilius moveri_, which causeth me to entertain strong hopes, that this
Illustrious _Virtuoso_ and Restless Inquirer into Nature's Secrets will not
stop here, but go on and prosper in the Disquisition or the other principal
Colours, _Green, Red_, and _Yellow_. The Reasoning faculty set once afloat,
will be carried on, and that with ease, especially, when the productions
thereof meet, as they do here, with so greedy an Entertainment at home and
abroad. I am confident, that the ROYAL SOCIETY, lately constituted by his
MOST EXCELLENT MAJESTY _for improving Natural knowledge_, will Judge it
their interest to exhort our Author to the prosecution of this Argument,
considering, how much it is their design and business to accumulate a good
stock of such accurate Observations and Experiments, as may afford them and
their Offpring genuine Matter to raise a Masculine Philosophy upon, whereby
the Mind of Man may be enobled with the Knowledge of solid Truths, and the
Life of Man benefited with ampler accommodations, than it hath been
hitherto.

Our Great Author, one of the Pillars of that Illustrious Corporation, is
constantly furnishing large _Symbola_'s to this work, and is now falln, as
you see, upon so comprehensive and important a theme, as will, if insisted
on and compleated, prove one of the considerablest peeces of that
structure. To which, if he shall please to add his Treatise of _Heat_ and
_Flame_, as he is ready to publish his Experimental Accounts of _Cold_, I
esteem, the World will be obliged to Him for having shewed them both the
_Right_ and _Left Hand_ of Nature, and the Operations thereof.

The considering Reader will by this very Treatise see abundant cause to
sollicit the Author for more; sure I am, that of whatever of the
Productions of his Ingeny comes into _Forein parts_ (where I am hap