Know thou that the Philosophers haue giuen them diuerse names: for some haue called them Mynes, some Animal, some Herball, and some by the name of Natures, that is Natural: some other haue called them by certaine other names at their pleasures, as seemed good vnto them. Thou must also know, that their Medicines are neere to Natures, according as the Philosophers haue said in their bookes, that Nature commeth nigh to nature, and Nature is like to nature, and Nature is ioyned to nature, and Nature is drowned in nature, and Nature maketh nature white, & Nature doth make nature red, and generation is retained with generation, & generation conquereth with generation. CHAP. IIII. _Of Decoction, and the effect thereof._ Know thou that the Philosophers haue named Decoction in their Bookes, saying, that they make Decoction in thinges: and that is it that engendreth them, and changeth them from their substances and colours, into other substãces and colours. If thou transgresse not, I tell thee in this booke, thou shalt proceed rightly. Consider brother, the seed of the earth, wheron men liue, how the heate of the Sunne worketh in it, till it be ripe, when men and other creatures feede vpon it, and that afterwarde Nature worketh on it by her heate within man, conuerting it into his flesh and blood. For like hereto is our operation of the masterie: the seed whereof (as the learned haue sayde) is such, that his perfection and proceeding consisteth in the fire, which is the cause of his life and death, without somwhat comming betweene, and his spiritualtie, which are not mingled but with the fire. Thus haue I tolde thee the truth, as I haue seene and done it. CHAP. V. _Of Subtiliation, Solution, Coagulation, and commistion of the Stone, and of their cause and end._