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

is not a metallic mineral.

such as salts, vitriols, alum, vitriol, arsenic, and orpiment, among the metals that derive their origin from Mercury. Now all metals that have derived their origin from Mercury are ductile and fusible, because their matter is an aqueous substance, mixed with an earthy substance by a strong commixture, so that one cannot be separated from the other. Wherefore that aqueous substance is congealed with cold more after the action of heat, and they will therefore be ductile or workable; and water alone is not congealed except with an earthy dryness, which alters the aqueousness, since in them there is no unctuous humor, because their coagulation is from earthy dryness; therefore they are not easily dissolved except through the vehement action of heat upon them, according to how strongly and forcibly they are mixed.

The nature of all liquefiable things is from quicksilver and its substance, for the reason that quicksilver is coagulated by the vapor or heat of white or red non-burning sulfur. Whence Aristotle in the fourth book of the Meteorology: If there be non-burning white sulfur, it congeals Mercury into good silver. If indeed the sulfur is pure with a clear redness, and in it there is the force of a heat that is simply non-burning, it congeals