From the Receipts, we think these Things follow∣ing worthy of Observation.
1. That the Wine, Red or White, is not Common, but Philoso∣phical, and that is the only thing that is obscure in these four Books; to be understood not according to the Letter, but by Analogy: but Aqua ardens, Aqua vitae, Spirit or Essence of a Philosophical Wine are the proper Names of it.
2. That the Aqua ardens of Philosophical Wine doth in some things agree with the Properties of Common Spirit of Wine; namely, it goes before its Phlegm in distillation: it is rectified as the Common, from its Phlegm. Lastly, being rectified, it is known by burning Linnen, Sugar, &c.
3. That this Aqua ardens doth by Circulation dayly lose its moi∣sture and sharpness; and is at length converted into a swimming Oyl, the Essence and Spirit of Philosophical Wine. But who ever redu∣ced Common Spirit of Wine, or Aqua Vitis, by bare Circulation into an Oyl? Who, I say, hath by continual Circulation brought that Oyl to Driness; so as to be sublimeable as a volatile Salt, and that not but by a strong Fire, as Isaacus affirms himself to have expe∣rienced, in the Description of his Vegetable Stone? Of which lower in the Third Book.
4. That the Oyl, or Essence of Wine may be divers ways made out of Philosophical Wine.
5. That not only the Time, but also the Scent, Colour, &c. of the Essence are varied according to the variety of Method: The Essence of Lully is like Heaven, that is, of a Sky-colour; the Oyl of Guido is green.