And before I descend to particulars, I shall repeat and premise this General Consideration, that these differing substances that are call'd Elements or Principles, differ not from each other as Metals, Plants and Animals, or as such Creatures as are immediately produc'd each by its peculiar Seed, and Constitutes a distinct propagable sort of Creatures in the Universe; but these are only Various Schemes of matter or Substances that differ from each other, but in consistence (as Running Mercury and the same Metal congeal'd by the Vapor of Lead) and some very few other accidents, as Tast, or Smel, or Inflamability, or the want of them. So that by a change of Texture not impossible to be wrought by the Fire and other Agents that have the Faculty not only to dissociate the smal parts of Bodies, but afterwards to connect them after a new manner, the same parcell of matter may acquire or lose such accidents as may suffice to Denominate it Salt, or Sulphur, or Earth. If I were fully to clear to you my apprehensions concerning this matter, I should perhaps be obliged to acquaint you with divers of the Conjectures (for I must yet call them no more) I have had Concerning the Principles of things purely Corporeal: For though because I seem not satisfi'd with the Vulgar Doctrines, either of the Peripatetick or Paracelsian Schools, many of those that know me, (and perhaps, among Them, _Eleutherius_ himself) have thought me wedded to the Epicurean _Hypotheses_, (as others have mistaken me for an _Helmontian_;) yet if you knew how little Conversant I have been with _Epicurean_ Authors, and how great a part of _Lucretius_ himself I never yet had the Curiosity to read, you would perchance be of another mind; especially if I were to entertain you at large, I say not, of my present Notions; but of my former thoughts concerning the Principles of things. But, as I said above, fully to clear my Apprehensions would require a Longer Discourse than we can now have.