De alchimia opuscula complura veterum philosophorum, quorum catalogum sequens pagella indicabit

And therefore, when it previously runs, heated, through the sulfurous earth, it ascends upwards. Whence its nature is such that it is subtilized by heat. Nevertheless, by continuous sublimation, it is highly purified, decocted, and thickened, and is gradually congealed by white and red sulfur. Since the sulfur is dissolved many times, and the sublimed quicksilver is first coagulated and waxed an alchemical term for rendering a substance capable of melting or absorbing by the action of heat, until in scarcely a thousand years, through the successive work of nature, it is coagulated into a perfect metal. From this, indeed, nature itself works metals in mineral vessels. In these works, therefore, it is necessary to imitate nature for whoever wishes to perfect medicine from imperfection to perfection, even though the bodies themselves differ in their composition from quicksilver, which are generated from it, in the manner in which it was pure or impure, from clean or unclean sulfur. For if quicksilver is coagulated from pure sulfur, in which is the force of heat, it will simply be gold. If, however, the sulfur is evil and weak, and the Mercury is of good substance, it converts it into copper or brass/bronze. If, however, the quicksilver is heavy, earthy, and unclean, and the sulfur is unclean, foul, earthy, and of fixed substance, iron is made from it, which afterwards is not easily melted. Tin, however, seems to have good quicksilver,