Now for that there is such an affinity between iron, and copper, that they may easily be converted one into the other; the same may likewise be done with lead, and tinne, by means of Sal Armonaick, and of certaine incerative powders of Borax, Salt peter, salt of Tartar, Salalchali, and other the like, which are called Atincars. _Panthee_ in his _Voarchadumie_, oil of glasse. Quicksilver also, is changed into lead or tinne, according as it is congealed to an imperceptible vapour, either of the one, or of the other, in this manner. Melt lead or tinne in a cruset, then let them a little cool, so long that they may be taken, but yet hot, or with a staffe of a torch, or the like, make a trench therein, wherein you shall put quicksilver which will be suddainly congealed, but bruiseable into powder. Reiterate that two or three times, and make it afterwards boil in the juice of _Mercuriale_, and will convert it selfe into metall according to the odour of that it was congealed; there is losse therein and that not a little; but yet at least, we may thereby see a possibility of transmutations of metals: In this respect, furthermore of lead, and tinne, there presents a very fair consideration, very uneasie to comprehend, and doth merit, that the cause thereof should bee sought after. We see by experience, that these two metals, each apart, are very soft, and of a tender fusion, yet being mingled they grow hard, and become firm and solid, touching which see what _Averroes_ sets downe in his Book of Vapours. That which doth consolide, and strengthen tinne, is lead; and reciprocally, lead tinne; for the glewish viscosity, which binds their parties, must consist of moisture and drynesse, this being done, there is no conglutination of tinne with tinne, therefore lead is mingled therewith, which is more moist, and with lead, tinne, which is more dry: so that those two mingled together, strengthen one another, better then being separated, and of their mingling, comes to procreate a glewing viscosity, which causeth in them a greater durity then they had, and binds them more firmly, just as sand, and chalke in the composition of Morter, which _Albertus_ also confirmes in his fourth and fifth chapters of Minerals. But wee will put off all these metallique particularities, and their divers transmutations, to our Treatise of Gold and Glasse, upon the 28. of _Job_, where under gold we wil comprehend all that shal depend on metals: and under glasse, stones, as well naturall, as artificiall; and all vitrifications, and enamels. Here we will take but that which will conduce to our subject, which is to treat of things intelligible, by the sensible: after the imitation of the Prophets, and chiefly metals and fire, whose operation is better known in metals, then in the other composed elements. The Prophets then have set down iron and brasse for a firme resistance. _My strength is not the strength of stones, nor is my flesh brasse, Job 6._ and in the 18. _Psal.