He therefore that will vitrify the aforesaid Cups, must first heat them red hot in a Fire made with Coals; and being thus hot, dip them in the aforesaid melted Flowers, and being taken out thence, put them under an earthen, or iron red hot vessel, and there let them cool which do perform the same things as those which are said of the Antimonial Cups. These Cups are not dangerous, as to be feared, because as Antimony is corrected by calcination, so _Auripigmentum_ is by sublimation: from which, if all the malignity be taken away either by Fire, or by nitre, the vomitive vertue is taken away, as afterward shall be demonstrated more at large in these five parts, when they shall come forth again with enlargements, _viz._ what purging things are, and how they put forth their vertues, a consideration being had of their malignity. There are also other ways of vitrification, and indeed very fine, and most desireable by all, if they should be communicated; but because it is not now my purpose to treat here of mechanical things, but only of some particular vitrifications of vessels belonging to our furnaces, I am resolved to omit them at this time, and make an end of these things. I am resolved, God willing, to set forth these parts more corrected, and in a larger manner, where many excellent things now omitted for some reasons, shall be published, and communicated. Wherefore I will now put an end to this fifth part, where although I might have added something that is singular concerning artificial furnaces, yet because time will not now permit, it shall be deferred to another time and place, where we shall treat further of the examining, trying and separation of metals: For the best way of melting of metals in a greater quantity hath not yet been known: And although they that deal in minerals perswade themselves of the perfection of their art, yet I can demonstrate an easier, and more compendious way of melting of metals in a shorter time, in a greater quantity, and with less costs and pains. Of which more at large elsewhere, wherefore (Courteous Reader) be contented with these things, and if I shall see that these few things shall be acceptable to thee, I will sometime hereafter for thy sake and to thy profit communicate _wonderful secrets_ which the world will not believe, and which hitherto are hid, either out of envy or ignorance. FINIS. AN APPENDIX.