The manner of separating Tin from Lead, and Copper from Iron, without loss of both metals, by preserving both, hath hitherto been unknown, which seems impossible to me by reason of the combustibility of both metals; and superfluous for the small profit, and saving charges. But how Gold and Silver may be separated from Tin with which commonly this abounds, without any wast, hath been long since sought to no purpose: but a possibility will appear to a serious considerer; and though I never tryed in great quantity, being content with a precipitation made with a little; I am yet perswaded this business will succeed in a great quantity and with much profit; namely by the help of a Furnace made on purpose where gold and silver precipitated with lead and _Halb Kopf_ by extream heat of fire; that tin is extracted to the remanence of the tenth part, which remainder you must peculiarly take and keep. Which done you must precipitate new tin in the foresaid Furnace, and so extract to the remainder of the _Regulus_, which being extracted from, is to be added to the first and reserved; which labor is to be reiterated, till thou hast a sufficient quantity of _Regulus_ filling the Furnace; which again thou must precipitate; for by this means gold and silver are brought together, so that they may easily afterward be separated from the superfluous tin. By this means I count the separation profitable, where but little substance is lost, which is turned into ashes and smoak. Nor doth adding lead and _Halb Kopf_ hinder, because sometime lead is mixt with tin, and the _Halb Kopf_ is separated again. It is good therefore to separate pots and old dishes, by reason of the mixture of lead, and to precipitate the gold and silver from them, by the adjection of _Halb Kopf_ only, where the residue is no way altered by the _Halb Kopf_, therefore thou mayst sell it, or refine it again: which in my judgment will be to great advantage. _What is to be held concerning the perfection of Metals._