In all Copper a spiritual occult Gold lies hid, the which in the labour of separation by Lead in a Cupel or Test, is not taken notice of, or considered. But this very Gold is nothing else but the colour of Copper, so firmly adhering unto its body, that it remaineth very difficult to be separated from thence, but the operation being rightly instituted, although it be not gainfull, yet it demonstrates a possibility of the thing, for the sake of experiencing whereof, to wit, whether there be Gold in all Copper, thou must labour after the following manner.
Dissolve Copper in Aq. Regis, and pour much water on the solution, that by this water the dissolved Copper may be largely diffused. Into this solution diffused by the water, pour Lead that is dissolved in Aq. Fortis, so that one or two half ounces of Lead may answer to one pound of Copper. But as often as the Lead shall settle to the bottom, thou shalt shake or stir it, that the solution may be well mixed, and that the Lead may attract something of Gold; and may precipitate it with it self to the bottom, the which being dried and separated in a Cupel, will leave a small quantity of Gold, not for an argument of profit, but a token of a possibility, which testifies that there is Gold in all Copper. But if any thing of profit were to be received, such Copper was to be taken which was already changed into vitriol. But among vitriols the Hungarian, Cyprian, Indian, Japanick, and other the like do excell, which do offer themselves in the Mines of Gold-bearing Copper, and are handled after the following manner.
LII. The manner of extracting Gold out of natural vitriol.
Dissolve thou vitriol in common water, and pour on the vitriol dissolved, a littled of dissolved Lead, and stir both solutions by frequent motions, that the Lead may attract the Gold out of the vitriol, to be dried and separated by a Cupel, which will remain like a grain of greater or lesser quantity, as the vitriol shall contain more or less of the same.
Of the vitriolated water out of which the Gold was extracted, thou shalt again make vitriol by so long boiling, and evaporating till a thin skin appear, which being then exposed to the cold will shoot into Crystals. But this operation brings with it more profit, if it be not now boiled up into Crystals, but that vitriol onely be taken which is drawn out of its Mineral into Water, and after the extraction of the Gold, is at length boiled up into vitriol.
But least this fishing of Gold out of vitriol should seem wonderfull unto any, we will shew a way, whereby Gold may be extracted out of Sea Water, or Sea Salt, the solution of Lead assisting: The manner is as followeth.
LIII. After what manner Gold is to be extracted out of Sea Salt, or Sea Water, not indeed with profit, but onely that it may be demonstrated, that Gold is hidden even in Sea Water or Sea Salt.
Fill a great Copper Kettle with Sea Water, and pour thereon a little dissolved Lead; the which goes to the bottom because it cannot indure Salt, and is straightway precipitated into a white powder, move and stir the water in the Kettle often, that the solution of Lead may every where touch the Sea-Salt-Water.
Through this action, a spiritual Gold adheres to the leaden powder, and sinks to the bottom together with it, which powder being freed from its Salt by common Water, and dried, and melted in a Cupel, leaves a small grain of Gold, as a remainder.
N. B. For this fishing Silver is more fit than Lead.