Now in doing these things, part of the separatory water here used, is as yet good enough, and may be kept for farther uses; but part thereof (viz.) that which is extracted out of the Metals by the help of common water, is, by reason of the mixing sweet or fair water therewith, rendred too weak for operating withal, and therefore must it be corrected and amended by some certain singular way, so as it may be again used about doing the same work.
Were it not for costs and labours we might separate that fair water from the Aqua-fortis and Aqua-regia, by the benefit of a glass Cucurbite, but forasmuch as there is given us a more compendious way, we will make choice of that.
For he that intends to get himself riches by the benefit of this separatory work delivered by me, or by the extraction of ☉ and ☽, will need a great deal of Aqua-fortis and Aqua-Regia, for what profit is it if you would extract them out of (but) a few Metals or Minerals? Seeing that scarce the one half of those strong Waters can be separated by pouring off from those subjects upon which they are poured, but the chiefest (or biggest) part of them sticks to the said metalline Matters, and contains in it as much ☉ and ☽, as that which we have abstracted by decanting it, and requisite it is that we thence abstract the same by the benefit of fair Water by due boiling, from whence it comes to pass that there will be also gathered a great deal of (insipid or useless) Water, (over and above.)
Those Aqua-fortis’s that are poured off, and hold in them ☉ and ☽, when they are mixt together, the ☽ and ☉ precipitates to the bottom of the Glass like powder, so that there remains nothing of the Metal in either water, nor is that water arising from the mixing of the Aqua-fortis wherein the ☽ was dissolved, and of the Aqua-regia wherein the ☉ was dissolved, at all the weaker, but it retains the virtues of extracting ☉ but not of ☽, because that the Aqua-regia being added to the Aqua-fortis converts it all of it into Aqua-regia.
This precipitation being made, and the clear water separated from the precipitation by decanting it, you may extract that acid Water, which yet adheres to the precipitate, with fair Water; but for as much as the virtues thereof are thereby much weakned, ’tis better to proceed after another kind of way, and we preferr this way (as best.)
Take the Calxes of ☉ and ☽ as they lie at the bottom of the Aqua-regia (or the acid mixt Spirits) and put them in a Linen cloth placed in a Funnel or over a Glass with a wide mouth, and the greatest part of the Aqua-regia will strain through into the Glass set thereunder; when no more water drops out, which we find is wont to be within half an hours space, tie up your cloth with a strong thred, that so nothing of the calx therein contained may get out; put it under some weight or heavy matter, that so all the Aqua-regia may be squeezed out, and the calx only may remain behind like Curd or new Cheese.
But for as much as the Calxes of ☉ and ☽ are not edulcorated, hence it comes to pass that the Cheese thence prepared, after the manner now spoken of, is as yet corrosive, nor is it easily dried. Both of them (☉ and ☽) we may easily correct, if we only admix therewith (as ’tis laid in a dish) a fourth part of fixt Salt, for by the virtue thereof even the corrosive Spirits sticking as yet therein are mortified, and the exsiccation, cementation, fixation, & reduction thereof is promoted. The Reduction being made of ☉ and ☽ which we are now made partakers of, that goldenish silvery Masse is to be granulated, and to be dissolved in new Aqua-fortis, and be precipitated with that Aqua-regia by the help of which, ☉ hath been extracted out of the Metals; the Cheese is to be freed from the water by squeezing it, and is to be sprinkled over with a fixt Salt, and to be melted. And all these Operations are to be so often repeated as necessity shall require, and there shall be at hand any Metal whereout-of Gold may be extracted, and so there may thence arise a continual Labour, which is beneficial, because that Aqua-fortis may (when the Labour or Operation is finished) be used about other such like extractions, and that which is the weaker sort may be prepared into Salt-petre: out of which may be made anew, excellent Aqua-fortis by the addition of Vitriol or Copperas, and so destilling them. The Vessels wherein the precipitation of Metals is performed, yea and the presses too by whose help the water is squeezed out of the Cheese, must be framed of strong Glass or of glazing Earth well glazed.
But for as much as the Vessels of Glass are very subject to be broken, and earthen Vessels, unless they have the solidity of Glass, waste abundance of water, and so moulder away; it would seem more convenient in my judgment to make the expression of the water out of the Cheese, between two Plates of Silver, for the water of the Cheese doth not at all corrode the ☽: Yea and if the Tunnels requisite to this work were made of ☽, it would not be amiss, nor would there be any fear of their breaking.
NB. The Extraction also of ☉ made with Aqua-regia may likewise be put into a Silver Cucurbite, whereby the work may be facilitated, and all loss and damage which otherwise may be lookt for (feared) from the using of Glasses, may be prevented. And suppose a Cucurbite, a Press and two Tunnels did cost one hundred imperials; yet notwithstanding the certainty and celerity of the Work will repay those costs very easily, seeing that all things are hereby done much safer, and much more speedily: Besides too, there’s nothing lost but the price of the fashioning your Vessels, for the Silver is always of the same value, and may again be sold at your pleasure. But he that wants suchlike Silver Vessels or cannot buy them, he may make use of Glass ones so long till he can get Silver ones; but it is necessary that the Silver of which these Vessels are made be very pure, and have no Copper in it; least the Aqua-regia extract the Copper thereout of, and so the Vessels (especially the Cucurbites) do in process of time get an undue softness.
The manner of extracting Metals by the help of this Cheese-water, is already disclosed in the foregoing (writings); however this I am constrained to advise here, that it is much more expedient, to use presently at the beginning for the extraction of ☉, rectified Spirit of Salt actuated with Aqua-fortis, than Aqua-regia, because that by thus doing there will be more plenty of ☉ gotten in the reduction than when the operation is accomplisht by Aqua-regia. It would be too long to reckon up the cause of this thing in this place: ’tis sufficient that I have shown which is good, which ill. Nay more, Spirit of Salt is cheaper than Aqua-regia, if prepared according to my description: Nor is there any reason to give credit to that slanderous fellow, Farnnerus, as if such a Spirit made by Vitriol, according to the manner mentioned in the first part of the Philosophical Furnaces, were not of any use, or at least-wise could not be prepared in great quantity by the aforesaid way: For when all circumstances fall not out as is wisht, the blame is not to be imputed to my description, but to the ignorance and unaptness of the Chymist himself.