I presume I need not mind you, _Carneades_, That both the Patrons of the ternary number of Principles, and those that would have five Elements, endeavour to back their experiments with a specious Reason or two; and especially some of those Embracers of the Opinion last nam'd (whom I have convers'd with, and found them Learned men) assigne this Reason of the necessity of five distinct Elements; that otherwise mixt Bodies could not be so compounded and temper'd as to obtain a due consistence and competent Duration. For Salt (say they) is the _Basis_ of Solidity; and Permanency in Compound Bodies, without which the other four Elements might indeed be variously and loosly blended together, but would remain incompacted; but that Salt might be dissolv'd into minute Parts, and convey'd to the other Substances to be compacted by it, and with it, there is a Necessity of Water. And that the mixture may not be too hard and brittle, a Sulphureous or Oyly Principle must intervene to make the mass more tenacious; to this a Mercurial spirit must be superadded; which by its activity may for a while premeate [Transcriber's Note: permeate], and as it were leaven the whole Mass, and thereby promote the more exquisite mixture and incorporation of the Ingredients. To all which (lastly) a portion of Earth must be added, which by its drinesse and poracity [Errata: porosity] may soak up part of that water wherein the Salt was dissolv'd, and eminently concurr with the other ingredients to give the whole body the requisite consistence. I perceive (sayes _Carneades_ smiling) that if it be true, as 'twas lately rooted [Errata: noted] from the Proverb, _That good Wits have bad Memories_, You have that Title, as well as a better, to a place among the good Wits. For you have already more then once forgot, that I declar'd to you that I would at this Conference Examine only the Experiments of my Adversaries, not their Speculative Reasons. Yet 'tis not (Subjoynes _Carneades_) for fear of medling with the Argument you have propos'd, that I decline the examining it at present. For if when we are more at leasure, you shall have a mind that we may Solemnly consider of it together; I am confident we shall scarce find it insoluble. And in the mean time we may observe, that such a way of Arguing may, it seems, be speciously accommodated to differing _Hypotheses_. For I find that _Beguinus_, and other Assertors of the _Tria Prima_, pretend to make out by such a way, the requisiteness of their Salt, Sulphur and Mercury, to constitute mixt Bodies, without taking notice of any necessity of an Addition of Water and Earth.