This is a collection of five alchemical tracts written by one of the most famous alchemists who was said to have discovered the Philosopher's Stone. In these writings Paracelsus attempts to educate the reader about the nature of the Philosopher's Stone and the scientific principles from which we can be assured of its existence and understand how it works. Like all alchemical tracts, the language is very cryptic and allegorical so as to be unintelligible to the unworthy.