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in Chapter 18, asserts that the seed of gold can be extracted, and in the same place teaches the way and method of extracting it (while plants, shrubs, and trees, as well as the entire animal kingdom, can be seen everywhere to be fertile and swollen with seed; yet in what place, or in what recesses that prolific seed of Minerals Mineralium semen The alchemical theory that metals grew in the earth from "seeds" or vapors, much like plants grow from biological seeds. lies hidden, cannot be perceived in any way even by the eyes of Lynceus A figure from Greek mythology and one of the Argonauts, famous for having sight so keen he could see through the earth and into the hearts of trees. or the most keen-sighted), there immediately occurred to me not just one or two passages from Arnaldus Arnaldus de Villa Nova (c. 1240–1311), a celebrated Catalan physician and scholar to whom many alchemical works were attributed. or Lullius Ramon Llull (c. 1232–1316); though a theologian, he became a legendary figure in alchemy with many texts written in his name. supporting that view, but various and infinite assertions of many other most weighty Philosophers affirming that very same thing with one voice: yet, being at first so discrepant among themselves and