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[Dolhopff, Georg Andreas] · 1681

The Spirit of the Salt of Urine Spiritus Salis Urinæ: A pungent, volatile solution of ammonium carbonate takes a long time to prepare. This process, however, is somewhat easier and more direct using Salmiac Salmiac: Sal ammoniac or ammonium chloride, a salt used in metalworking and medicine without any sublimation: Place it in a flask / pour Oil of Tartar Oleum Tartari: A saturated solution of potassium carbonate, used here as a strong base to release ammonia gas over it until it becomes like a mash or paste / seal it quickly / for otherwise the volatile salt will escape / place a large receiver original: "Fürlag" before it / then the Spirit of the Salt of Urine will settle in the alembic head The "Helm" or head is the top part of the still where vapors condense. in crystalline form / let it proceed gradually / until the crystals dissolve into themselves / then as soon as the recipient The vessel that catches the final liquid. is removed / so that the Tartaric moisture does not get inside / the Spirit of the Salt will not accept it / then take heed / the Spirit of the Salt moves quickly / and is finished in two hours.
Take the urine of boys / who are approximately twelve years old / and drink wine / it must be fresh / distill the same in a boiling water bath Balneo: Short for Balneum Mariae, a double-boiler setup for gentle heat, until it reaches dryness. Then pour that which has come over back onto the dregs Feces: The solid residue or waste remaining after distillation and distill it a second time / thus the spirit of the urine will come over with it / keep this. Pour as much as is enough of this spirit over a powdered emerald / and place it well-secured in a warm place / until the sky-blue color appears / pour off this spirit of urine / which is now impregnated with the tincture of the emerald / and distill it off from it again / so that the extract