The spirit which came over, may either be kept as it is, or else rectified _per arenam_ in a glass retort, and used in Physick; it is clean of another taste than the spirit of common salt or vitriol, for it is not so sharp; it smelleth of the flints after a sulphureous manner, and tasteth urin-like, and it is very good for those that are troubled with the gout, stone and Tisick: for it provoketh urin and sweat mightily, and (because it cleanseth and strengthneth the stomach) it also maketh one have a good appetite to his Victuals. What it can do else is unknown to me as yet, but it is credible that it may act its part in many other diseases, which is left free for every one to try. In my opinion (since the spirit of the salt of Tartar is good to be used of it self for the stone, and that here it is strengthned by the sand, which have the signature of the stone of the Microcosme) there is hardly any particular medicine, which can go beyond it, but I leave every one to his own opinion and experience. Externally used, it quencheth inflammations and maketh a pure skin, _&c._ The remainder, which I bid you keep, and looks like a transparent clear glass, is nothing else but the most fixed part of the salt of Tartar and flints, which joyned themselves thus in the heat, and turned to a soluble glass, wherein lyes hid a great heat and fire. As long at it is kept dry from the air, it cannot be perceived in it: but if you pour water upon it, then its secret heat will discover it self. If you make it to fine powder in a warm morter, and lay it in a moist air, it will dissolve and melt into a thick and fat oyl, and leave some fæces behind. This fat liquor or oyl of flints, sand or crystal may not only be used inwardly and outwardly of it self, but also serveth to prepare minerals and metals into good medicines, or to change them into better by Chymical art. For many great secrets are hid in the contemptible peble or sand; which an ignorant and unexpert man (if they were disclosed to him) would hardly believe: for this present world is by the divels craft so far possessed with cursed filthy avarice, that they seek for nothing but money, but honest and ingenious sciences are not regarded at all; and therefore God doth close our eyes that we cannot see what lyeth before them, and we trample upon with our feet. That worthy man _Parcelsus_ hath given it us sufficiently to understand, when he saith in his book (containing the vexations of Alchymists) that many times a despicable flint cast at a Cow is more worth than the Cow; not only because that gold may be melted out of it, but also that other inferior metals may be purified thereby, so that they are like unto the best gold and silver in all tryals; and although I never got any great profit by the doing of it, yet it doth suffice me that I have seen several times the possibility and truth thereof, which in its proper place likewise shall be taught.