Sometimes an alteration happens to mans body, from the attraction of mineral vapors (which cannot be done by my Furnace) in the tryal; therefore here I will set down a certain medicine for the Workmans sake, as well for preserving as curing, namely, a clear rubin fixt, and soluble of Gold and Antimony. Take of pure Gold half an ounce, dissolve it in _Aqua Regia_; precipitate the solution with liquor of Flints, as before is said in the Second part; edulcorate and dry the calx, and it will be prepared; take _Regulus Martis_ (of which is spoken a little before) beaten fine, to which mix three parts of the purest Nitre; place the mixture in the crucible between burning coals, putting to fire by degrees: which done make a stronger, _viz._ for fusion; for then the Mass will be made purple; which taken forth and cooled grind very small, of which take three or four parts and mix with one part of the aforesaid golden calx; place it mixed in a strong crucible covered over in the aforesaid winde Furnace, and make the mass to flow together like metal, and it will assume the Antimonial Nitre in the fusion, and will dissolve the Gold or the calx of Gold, and a mass of an Amethyst colour will be made therewith, which so long leave in the fire, till it get the clearness of a Ruby, which one may try with a clean wire or iron bowed and put therein, although the mean time the mass deprived of fusibility, is thickened; it is meet to add some Nitre or Tartar, for speeding fusion, and that as often as shall be needful. Lastly, pour the mass, when it shall come to the utmost redness of a Ruby, hot into a clean copper morter, which there leave until it cool, and it will be in colour very like to an Oriential Ruby; then bruise it hot into powder, for taking air it would melt, and extract the tincture by the affusion of the spirit of Wine in a Vial, and the Gold together with the Antimony will remain very white like the finest Talc, to be washed with clear water, in a glass, edulcorated and dryed; which melted with a stronger fire, gives a Yellow glass, in which no Gold appears, yet separable by way of precipitation with the filings of Iron and Copper, from which it recovers its ancient colour, but without profit, by reason of the wast, the tinged spirit is to be taken away from the tincture, which is a very soveraign medicine in many grievous diseases.