seated our selves, shutting the Books that lay open, and turning to us with a smiling countenance seemed ready to begin some such unconcerning discourse as is wont to pass or rather waste the time in promiscuous companies.

But Eleutherius guessing at what he meant to do, prevented him by telling him, I perceive Carneades by the books that you have been now shutting, and much more by the posture wherein I found Persons qualifi’d to discourse of serious matters; and so accustom’d to do it, that you three were before our coming, engag’d in some Philosophical conference, which I hope you will either prosecute, and allow us to be partakers of, in recompence of the freedome we have us’d in presuming to surprise you, or else give us leave to repair the injury we should otherwise do you, by leaving you to the freedom we have interrupted, and punishing our selves for our boldness by depriving our selves of the happiness of your company. With these last words he and I rose up, as if we meant to be gone, But Carneades suddenly laying hold on his arme, and stopping him by it, smileingly told him, We are not so forward to lose good company as you seem to imagine; especially since you are pleas’d to desire to be present at what we shall say, about such a Subject as that You found us considering. For that, being the number of the Elements, Principles, or Materiall Ingredients of Bodies, is an enquiry whose truth is of that Importance, and of that Difficulty, that it may as well deserve as require to be searched into by such skilfull Indagators of Nature as your selves. And therefore we sent to invite the bold and acute Leucippus to lend us some light by his Atomical Paradox, upon which we expected such pregnant hints, that ’twas not without a great deal of trouble that we had lately word brought us that he was not to be found; and we had likewise begg’d the Assistance of your presence and thoughts, had not the messenger we employ’d to Leucippus inform’d us, that as he was going, he saw you both pass by towards another part of the Town; And this frustrated expectation of Leucippus his company, who told me but last night that he would be ready to give me a meeting where I pleas’d to day, having very long suspended our conference about the freshly mention’d Subject, it was so newly begun when you came in, that we shall scarce need to repeat any thing to acquaint you with what has pass’d betwixt us before your arrival, so that I cannot but look upon it as a fortunate Accident that you should come so seasonably, to be not hearers alone, but we hope Interlocutors at our conference. For we shall not only allow of your presence at it, but desire your Assistance in it; which I adde both for other reasons, and because though these learned Gentlemen (sayes he, turning to his two friends) need not fear to discourse before any Auditory, provided it be intelligent enough to understand them, yet for my part (continues he with a new smile,) I shall not dare to vent my unpremeditated thoughts before two such Criticks, unless by promising to take your turnes of speaking, You will allow me mine of quarrelling, with what has been said. He and his friends added divers things to convince us that they were both desirous that we should hear them, and resolved against our doing so, unless we allowed them sometimes to hear us. Elutherius after having a while fruitlesly endeavoured to obtain leave to be silent promis’d he would not be so alwayes, provided that he were permitted according to the freedom of his Genious and Principles to side with one of them in the managing of one Argument, and, if he saw cause, with his Antagonist, in the Prosecution of another, without being confin’d to stick to any one party or Opinion, which was after some debate accorded him. But I conscious to my own Disability’s told them resolutely that I was as much more willing as more fit to be a hearer then a speaker, among such knowing Persons, and on so abstruse a Subject. And that therefore I beseeched them without necessitating me to proclaim my weaknesses, to allow me to lessen them by being a silent Auditor of their Discourses: to suffer me to be at which I could present them no motive, save that their instructions would make them in me a more intelligent Admirer. I added, that I desir’d not to be idle whilst they were imploy’d, but would if they pleas’d, by writing down in short hand what should be delivered, preserve Discourses that I knew would merit to be lasting. At first Carneades and his two friends utterly rejected this motion; and all that my Resoluteness to make use of my ears, not tongue, at their debates, could do, was to make them acquiesce in the Proposition of Eleutherius, who thinking himself concern’d, because he brought me thither, to afford me some faint assistance, was content that I should register their Arguments, that I might be the better able after the conclusion of their conference to give them my sence upon the Subject of it, (The number of Elements or Principles:) which he promis’d I should do at the end of the present Debates, if time would permit, or else at our next meeting. And this being by him undertaken in my name, though without my consent, the company would by no means receive my Protestation against it, but casting, all at once, their eyes on Carneades, they did by that and their unanimous silence, invite him to begin; which (after a short pause, during which he turn’d himself to Eleutherius and me) he did in this manner.

Notwithstanding the subtile reasonings I have met with in the books of the Peripateticks, and the pretty experiments that have been shew’d me in the Laboratories of Chymists, I am of so diffident, or dull a Nature, as to think that if neither of them can bring more cogent arguments to evince the truth of their assertion then are wont to be brought; a Man may rationally enough retain some doubts concerning the very number of those materiall Ingredients of mixt bodies, which some would have us call Elements, and others principles. Indeed when I considered that the Tenents concerning the Elements are as considerable amongst the Doctrines of natural Philosophy as the Elements themselves are among the bodies of the Universe, I expected to find those Opinions solidly establish’d, upon which so many others are superstructed. But when I took the pains impartially to examine the bodies themselves that are said to result from the blended Elements, and to torture them into a confession of their constituent Principles, I was quickly induc’d to think that the number of the Elements has been contended about by Philosophers with more earnestness then success. This unsatisfiedness of mine has been much wonder’d at, by these two Gentlemen (at which words he pointed at Themistius and Philoponus) who though they differ almost as much betwixt themselves about the question we are to consider, as I do from either of them, yet they both agree very well in this, that there is a determinate number of such ingredients as I was just now speaking of, and that what that number is, I say not, may be, (for what may not such as they perswade?) but is wont to be clearly enough demonstrated both by Reason and Experience. This has occasion’d our present Conference. For our Discourse this afternoon, having fallen from one subject to another, and at length setl’d on this, they proffer’d to demonstrate to me, each of