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Frankenberg, Abraham von, 1593-1652; Rebentrost, David, 1614-1703; Keiling, Georg, ca. 17. Jh. · 1718

then, using a Balneum Mariae water bath, draw off the Spiritus Mercurii spirit of mercury again, and finally strengthen the Ignis fire. A pulvis cineritius ash-colored powder will sublime. If this is sprinkled with a good distilled wine vinegar that has been sharpened with Salmiak sal ammoniac, and is well rubbed with it, the Mercurius mercury revivifies. The more the powder is sprinkled with the wine vinegar and diligently rubbed, the more Mercurius one obtains.
One must take our matter entirely crudam raw from the mountains, ground small. To this, add a Sal nostri our salt and silicates mixed together, and previously beautifully crystallized, or also a Salmiak sal ammoniac purely purified. Grind everything together in a glass mortar, rubbing usque ad ignitionem until heating/ignition, and iterum iterumque again and again. Finally, post crebras attractiones & reiterationes after frequent attractions and iterations, place it in a small glass flask and sublimate it in heat. The Mercurius verus true mercury will attach itself and become currens running after trituration.
Take the flores crystallinæ puritatis ex materia nostra jam dicta flowers of crystalline purity from our aforementioned matter, place them in a phial or an uncut flask, and melt the flask or phial in the flame, more consueto in the usual manner. However, while melting it shut, a narrow and long copper tube (made of copper sheet and coated with luto lute/clay) must be inserted into the mouth of the glass. This tube must