The Oil Or Liquor Of Sand Flints Pebbles Or Crystals For The Aforesaid Preparation Is Made Thus

Take of the best salt of tartar, being very well purified by two or three dissolutions and coagulations, and powdered in a hot mortar, one part. Of flints, pebbles, or crystals, being powdered, or small sand well washed, the fourth part. Mingle them well together. Put as much of this composition as will fill an eggshell into a crucible. Set in the earthen furnace (described in Book III) and made red hot. Presently there will come over a thick and white spirit. This do until you have enough. Then take out of the crucible while it is glowing hot, and that which is in it is like transparent glass, which keep from the air. The spirit may be rectified by sand in a glass retort.

This spirit is of excellent use in the gout, stone, ptisick, and indeed in all obstructions. It provokes sweat, urine, and cleanses the stomach and, by consequence, is effectual in most diseases. It being applied externally clears the skin and makes it look very fair.

Take that which remains at the bottom in the crucible and beat it to powder, and lay it in a moist place so that it dissolves into a thick fat oil. And this is that which is called the oil of sand, of flints, pebbles, or crystals.

This oil is of wonderful use in medicine, as also in the preparation of all sorts of minerals. This oil, being taken inwardly in some appropriate liquor, dissolves tartarous coagulations in the body, and so opens all obstructions.

It precipitates metals and makes the calx thereof more weighty than oil of tartar does.

It is of a golden nature. It extracts colors from all metals, is fixed in all fires, makes fine crystals and borax, and matures imperfect metals into gold.

If you put it into water, there will precipitate a most fine white earth, of which you may make as clear vessels as are china dishes.

Note that all sand, flints, and pebbles, even the whitest, have in them a golden sulphur or tincture, and if a prepared lead be for a time digested in this oil it will seem, as it were, gilded because of the gold that will hang upon it which may be washed away in water. Gold also is found in sand and flints, etc., and if you put gold into this oil it will become more ponderous thereby.

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