If you will extract a tincture out of peble-stones, for use in Physick or in Alchymy, then in stead of the white take a fair yellow, green or blew peble or flint, whether it hold fixed or volatile gold, and first with salt of tartar distill the spirit thereof; or if you do not care for the spirit, then melt the mixture in a covered crucible into a transparent, soluble and fusible glass, and in a warm morter make it into fine powder; put this powder in a long necked glass, and pour upon it rectified spirit of wine (it needeth not to be dephlegmed, it matters not if it be but pure) let it remain upon it in a gentle warmth, till it be turned red (the glass with the prepared peble or flints must be often stirred about, that the peble be divided, and the spirit of wine may be able to work upon it) then pour off the coloured spirit of wine, and pour on other, and let this likewise turn red: this pouring off and on must be iterated so often, till the spirit of wine get no more colour out of it. All the Tinctured spirit of wine put together, & abstract in a Balneum through a Limbeck from the Tincture which will remain in the bottom of the glass body like a red juyce, which you must take out and keep for its use. _The use of the Tincture of pebles or flints in Physick._ This Tincture if it be made of gold, pebles or sand, is to be held for none of the least medicines, for it doth powerfully resist all soluble Tartareous coagulations, in the hands, knees, feet, reins and bladder; and although in want of those that hold gold, it be extracted but only out of common white peble, it doth act its part however, though not altogether so well as the first. Let no man marvel, that sand or pebles made potable, have so great vertue; for not all things are known to all; and this Tincture is more powerful yet, if first gold have been dissolved with the liquor of pebles before the extraction. And let no man imagine that this Tincture comes from the salt of Tartar (which is taken to the preparing of the oyl of sand) because that of it self also doth colour the spirit of wine, for there is a great difference betwixt this Tincture and that, which is extracted out of the salt of Tartar: for if you distill that of the salt of tartar in a little glass body or retort, there will come first a clear spirit of wine, then an unsavory phlegm, and a salt will remain behind, in all like unto common salt of tartar, wherein after its calcining not the least colour appeareth, and because none came over neither, it might be questioned where it remained then?