Nature they so Confidently take upon them to teach others are not only Productions of their own Skill, but such as others Know not else what to make of.
But though (Continues Carneades) the Chymists have been able upon some or other of the mention’d Acounts, not only to Delight but Amaze, and almost to bewitch even Learned Men; yet such as You and I, who are not unpractis’d in the Trade, must not suffer our Selves to be impos’d upon by hard Names, or bold Assertions; nor to be dazl’d by that Light which should but assist us to discern things the more clearly. It is one thing to be able to help Nature to produce things, and another thing to Understand well the Nature of the things produc’d. As we see, that many Persons that can beget Children, are for all that as Ignorant of the Number and Nature of the parts, especially the internal ones, that Constitute a Childs Body, as they that never were Parents. Nor do I Doubt, but you’l excuse me, if as I thank the Chymists for the things their Analysis shews me, so I take the Liberty to consider how many, and what they are, without being astonish’d at them; as if, whosoever hath Skill enough to shew men some new thing of his own making, had the Right to make them believe whatsoever he pleases to tell them concerning it.
Wherefore I will now proceed to my Third General Consideration, which is, That it does not appear, that Three is precisely and Universally the Number of the Distinct Substances or Elements, whereinto mixt Bodies are resoluble by the Fire; I mean that ’tis not prov’d by Chymists, that all the Compound Bodies, which are granted to be perfectly mixt, are upon their Chymical Analysis divisible each of them into just Three Distinct Substances, neither more nor less, which are wont to be lookt upon as Elementary, or may as well be reputed so as those that are so reputed. Which last Clause I subjoyne, to prevent your Objecting, that some of the Substances I may have occasion to mention by and by, are not perfectly Homogeneous, nor Consequently worthy of the name of