to be _tam Homogenea, quam Heterogenea congregare_; Give me leave to represent to You, that neither is this Definition unquestionable; for not to Mention the Exceptions, which a _Logician_, as such, may Take at it, I Consider that the Union of Heterogeneous Bodies which is Suppos'd to be the Genuine Production of Cold, is not Perform'd by every Degree of Cold. For we see for Instance that in the Urine of Healthy Men, when the Liquor has been Suffer'd a while to stand, the Cold makes a Separation of the Thinner Part from the Grosser, which Subsides to the Bottom, and Growes Opacous there; whereas if the Urinal be Warme, these Parts readily Mingle again, and the whole Liquor becomes Transparent as before. And when, by Glaciation, Wood, Straw, Dust, Water, &c. are Suppos'd to be United into one Lump of Ice, the Cold does not Cause any Real Union or Adunation, (if I may so Speak) of these Bodies, but only Hardening the Aqueous Parts of the Liquor into Ice, the other Bodies being Accidentally Present in that Liquor are frozen up in it, but not Really United. And accordingly if we Expose a Heap of Mony Consisting of Gold, Silver and Copper Coynes, or any other Bodies of Differing Natures, which are Destitute of Aqueous Moisture, Capable of Congelation, to never so intense a Cold, we find not that these Differing Bodies are at all thereby so much as Compacted, much less United together; and even in Liquors Themselves we find _Phaenomena_ which Induce us to Question the Definition which we are examining. If _Paracelsus_ his Authority were to be look't upon as a Sufficient Proof in matters of this Nature, I might here insist on that Process of his, whereby he Teaches that the Essence of Wine may be Sever'd from the Phlegme and Ignoble Part by the Assistance of Congelation: and because much Weight has been laid upon this Process, not only by _Paracelsians_, but other Writers, some of whom seem not to have perus'd it themselves, I shall give You the entire Passage in the Authors own Words, as I lately found them in the sixth Book of his _Archidoxis_, an Extract whereof I have yet about me; and it sounds thus. _De Vino sciendum est, faecem phlegmaque ejus esse Mineram, & Vini substantiam esse corpus in quo conservatur Essentia, prout auri in auro latet Essentia. Juxta quod Practicam nobis ad Memoriam ponimus, ut non obliviscamur, ad hunc modum: Recipe Vinum vetustissimum & optimum quod habere poteris, calore saporeque ad placitum, hoc in vas vitreum infundas ut tertiam ejus partem impleat, & sigillo Hermetis occlusum in equino ventre mensibus quatuor, & in continuato calore teneatur qui non deficiat. Quo peracto, Hyeme cum frigus & gelu maxime saeviunt, his per mensem exponatur ut congeletur. Ad hunc modum frigus vini spiritum una cum ejus substantia protrudit in vini centrum, ac separat a phlegmate: Congelatum abjice, quod vero congelatum non est, id Spiritum cum substantia esse judicato. Hunc in