several ways dispos’d or contexed, is able to exhibit, may partly appear by the multitude of differing Engins which by the contrivances of skilful Mechanitians, and the dexterity of expert Workmen, may be made of Iron alone. But in our present case being allow’d to deduce compound Bodies from four very differently qualified sorts of matter, he who shall but consider what you freshly took notice of concerning the new Concretes resulting from the mixture of incorporated Minerals, will scarce doubt but that the four Elements mannag’d by Natures Skill may afford a multitude of differing Compounds.
I am thus far of your minde (sayes Carneades) that the Aristotelians might with probability deduce a much greater number of compound Bodies from the mixture of their four Elements, than according to their present Hypothesis they can, if instead of vainly attempting to deduce the variety and properties of all mixt Bodies from the Combinations and Temperaments of the four Elements, as they are (among them) endowd with the four first Qualities, they had endeavoured to do it by the Bulk and Figure of the smallest parts of those supposed Elements. For from these more Catholick and Fruitfull Accidents of the Elementary matter may spring a great variety of Textures, upon whose Account a multitude of compound Bodies may very much differ from one another. And what I now observe touching the four Peripatetick Elements, may be also applyed, mutatis mutandis, (as they speak) to the Chymical Principles. But (to take notice of that by the by) both the one and the other, must, I fear, call in to their assistance something that is not Elementary, to excite or regulate the motion of the parts of the matter, and dispose them after the manner requisite to the Constitution of particular Concretes. For that otherwise they are like to give us but a very imperfect account of the Origine of very many mixt Bodies, It would, I think, be no hard matter to perswade you, if it would not spend time, and were no Digression, to examine, what they are wont to alledge of the Origine of the Textures and Qualities of mixt Bodies, from a certain substantial Form, whose Origination they leave more obscure than what it is assum’d to explicate.