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Weitbrett, Johann J. · 1723

First Part /
that the metals can be changed into one another, because they are natural and are of one essence in their Matter original: "Materia." In this context, the underlying substance that is common to all metals.; therefore Hermes Hermes Trismegistus, the legendary Hellenistic figure to whom many foundational alchemical texts were attributed. has established a circulation within the metals, for through the destruction of one, it is converted into the other.
Likewise, Rhazes original: "Rasis." Abu Bakr al-Razi (c. 865–925 AD), a Persian polymath and one of the most important figures in the history of medicine and alchemy. in the Book of Divinity original: "lib. Divinitatis." A work attributed to Rhazes often cited regarding the shared nature of substances. says: You should know that natural things are so bound together that in every thing, every other thing exists. This is better understood in the Liquefactis literally "the meltables." (that is, in the metals) than in other things; for the inner part of gold is silver-like, and the inner part of silver is gold-like, so that one may elicit silver from gold and gold from silver. In copper there is the Potential for gold and silver, though it is not visible; and so too in iron, lead, and tin, silver and gold are within them. Albertus Albertus Magnus (c. 1200–1280), a Dominican friar and bishop who wrote extensively on the natural sciences. writes the same in Book 3 of On Minerals, Chapter 8. So it remains true that in every metal there are multiple metallic natures, and one is hidden within the other.
This is also testified by Theophrastus Paracelsus. in the Book of Vexations original: "Libro Vexationis," referencing Paracelsus's "The Vexations of the Alchemists." in the first rule. In the same book, he reminds all alchemists that true Alchemy—which alone teaches the art of making silver and gold from the five metals that are imperfect—should use no other recipe, but rather: solely from the metals, out of the metals, through the metals, and with the metals, the metals are made perfect.