Now follows the Praxis of the aforesaid Theory

The afore-written Explanation of the Book (of Vexations) of Paracelsus, hath taught a most certain and undoubted Transmutation of Metals, and hath sufficiently advised by what means they are to be handled. But because this action requires a great experience in metallick affairs, I am willing to add some special waies of Proceeding, and that in perspicuous words; but ’tis impossible to write so plainly that none may erre; it would be too prolix, tedious, and unfit, and as if many Elements of the Physicks, and other subtile things, were read to a Child that is not capable of understanding them; the labour thus bestowed, would be wholly in vain: Nor do I undertake to instruct the Tyroes or Novices in Alchymy, but such as are skill’d in the metallick labour of fusion, washing, separation, and the like, of a subtile Intellect and experienced Judgment.

I would verily have written more clearly, did I not fear that the Art would become a Trade; some will think that I have written too openly, and will be angry that such Secrets are made known to the World: Who can satisfie all People? But be it as it will, ’twill be alwaies good to have done a profitable Work for my Neighbour.