For example, dissolve in _Aqua Regia_ as much Gold as you please, and pour of this liquor upon it, till all the Gold fall to the bottom like a yellow powder, and the solution turn white and clear, which you must pour off, and edulcorate the precipitated Gold with sweet water, and then dry it (as you was taught to do with the _Aurum fulminans_) and you need not fear that it will kindle and fulminate in the drying, as it useth to do, when it is precipitated with salt of Tartar or spirit of urin, but you may boldly dry it by the fire, and it will look like yellow earth, and will weigh as heavy again as the Gold did weigh before the solution; the cause of which weight is, the peble stones, which did precipitate themselves together with the Gold. For the _Aqua Regia_ by its acidity hath mortified the salt of Tartar, and robbed it of its vertues so, that it could not choose but let fall the assumed pebles or sand; on the other side, the salt of Tartar which was in the liquor of pebles, hath annihilated the sharpness of the _Aqua Regia_, so that it could not keep the dissolved gold any longer, whereby both the gold and the pebles are freed from their dissolver. This edulcorated and dryed yellow powder put into a clean crucible, and set it between live coals, that it begin to be red hot, but not long, and the yellow will be changed into the fairest purple colour, which is pleasant to behold, but if you let it stand longer, then the purple colour vanisheth, and it turns to a brown and brick colour: and therefore if you desire to have a fair purple coloured gold, you must take it off from the fire, as soon as it is come to that colour, and let it not stand any longer, else it loseth that colour again. This fair gold-powder may be used by the rich (which are able to pay for it) from ℈i to ʒ_ss._ in convenient vehicles; and in all diseases, where sweating is needful: for besides the provoking of sweat, it comforteth not only the heart, but also by the vertue of the peble it expelleth the stone in the reins and bladder (if it be not grown to the height of hardness) like sand together with the urine: so that it may be safely used as well to prevent, as to cure the plague, gout and stone. How to make further out of this purple coloured gold a soluble Ruby for medicinal use, shall be taught in the fourth part: for in regard that it must be done by a strong fire in a crucible, it doth not belong hither, but to its proper place, where other like Medicaments are taught to be made.