you calcine Spirits; give it a Fire as hot as the Sun is at Mid-summer, no more, except by chance a little hotter or colder, provided it be not so great as to melt the Lead, for so your Matter would be liquid as Oyl, and should it stand so the space of 12 days, all the Sulphur would fly away, and the Matter be corrupted, for the Sulphur of it is not yet fixed, and on the outside only, and therefore the Matter is most ea∣sily melted, and though it be pure, yet is it not fixed; where∣fore the Fire must be so gentle as not to melt the Matter; let it stand so the space of Six Weeks, after which take a little, project it upon a hot Iron, if it presently melts and fumes, it is not yet fixed, but if it remains, the Sulphur of it is fixed: Then increase the Fire notably, till your Matter becomes citrine, and so continually till it grows red, still increasing the Fire till it attains to the colour of Rubies; increase till it is red hot, and then is it fixed, and prepared for Infusion, with the Noble Water of Paradise (the Menstruum described in Numb. 114.)
Besides this, there is indeed another way also of calcining Philosophical Vitriol, which is done in an open Vessel; thus graduated Verdigrese is calcined to redness before the Distil∣lation of it, in the preparation of the Spirit of Venus of Basilius, as we have observed in the precedent Kind, but this belongs not to this place, for the Calx remains volatile, not fixed, which way of Calcining was invented meerly for the seperation of the Phlegme.
The third Branch consists in a new dissolution of this fixed Vitriol in Philosophical Vinegar, for which Reason this Vi∣triol is volatilized again, and made fit for Distillation, in the former Receipt, this Solution is wholly omitted, but more ex∣actly described in the latter Process.
The fourth Branch is the single, and frequent Distillation in the several ways of making all these Stinking Menstruums, yet this excepted, that out of this graduated, fixed, and again volatilized Vitriol, the Spirit ascends not White, but of a Saffron Colour (because more Mature) before the Red Oyl; and lastly, the White Spirit appears also, being extracted out of the Salt or White Body.