And the Lead runeth together into a fair white _Regulus_, which is much whiter, purer and fairer than other common lead: but the tartar retaines the blackness, and raiseth it self to the top as a fusible dross, which is impregnated with the sulphur of lead, wherewith you may colour hair, bones, feathers and the like, and make them to be, and remain brown and black. I made tryal once of such a distillation in an iron vessel, whereby the same in the inside was so whitened by the purified lead, that it was like unto fine silver in brightness: which afterwards trying again, it would not fall so fair as at first; whereat none ought to wonder, for I could write something more (if it were fit) of tartar, knowing well what may be effected with it, if I did not stand in fear of scoffers, which vilify all what they do not understand. I durst presume to call tartar the Sope of the Philosophers; for in the cleansing of some metals, by long experience I found it of admirable vertue; though I would not be understood thus, as if I did count it to be the true _Azoth universalis Philosophorum_, whereby they wash their Laton: but I cannot deny, but that it is of particular use for the washing and cleansing of several metals; for it is indued with admirable vertues for the use of metals, whereof in other places more shall be said hereafter. _How to make a Tartarised spirit and oyle out of Iron or Steel and Copper._ If you intend to make a good medicine out of iron or steel or copper joyned with tartar, then for the iron or steel take an iron pot, and for copper a kettel of copper, make them very clean and put in it the filings of iron, or steel, or copper, which you please, and twice as much of pure tartar made into powder, and so much water, that the tartar maybe dissolved well by it in the boyling, and so boyl the metal with the tartar-water so long, till it be deeply coloured by the metal, as red by the iron, and deep green by the copper; and when the water in the boyling doth waste, you must still supply it with other, that the tartar may not burn; for there must be alwayes so much water, that no skin of the tartar may rise at the top, but that it remain always open, and there must not be too much water neither, lest it be too sweet, and not able to dissolve the metal. The solution of iron or steel being come to be red and sweet, and in taste like unto vitriol, but green and bitter of copper, pour it off warm by inclination into an other clean vessel, and let it stand so long again in a very gentle heat of coals, till almost all the water be evaporated, and the dissolved metal with the tartar remain in the consistency of honey.