But though (sayes Eleutherius) You have alledg’d very plausible Arguments against the tria Prima, yet I see not how it will be possible for you to avoid acknowledging that Earth and Water are Elementary Ingredients, though not of Mineral Concretes, yet of all Animal and Vegetable Bodies; Since if any of these of what sort soever be committed to Distillation, there is regularly and constantly separated from it a phlegme or aqueous part and a Caput Mortuum or Earth.
I readily acknowledged (answers Carneades) it is not so easy to reject Water and Earth (and especially the former) as ’tis to reject the Tria Prima, from being the Elements of mixt Bodies; but ’tis not every difficult thing that is impossible.
I consider then, as to Water, that the chief Qualities which make men give that name to any visible Substance, are, that it is Fluid or Liquid, and that it is insipid and inodorous. Now as for the tast of these qualities, I think you have never seen any of those separated substances that the Chymists call Phlegme which was perfectly devoyd both of Tast and Smell: and if you object, that yet it may be reasonably suppos’d, that since the whole Body is Liquid, the mass is nothing but Elementary Water faintly imbu’d with some of the Saline or Sulphureous parts of the same Concrete, which it retain’d with it upon its Separation from the Other Ingredients. To this I answer, That this Objection would not appear so stong as it is plausible, if Chymists understood the Nature of Fluidity and Compactnesse; and that, as I formerly observ’d, to a Bodies being Fluid there is nothing necessary, but that it be divided into parts small enough; and that these parts be put into such a motion among themselves as to glide some this way and some that way, along each others Surfaces. So that, although a Concrete were never so dry, and had