The same natures benignity, exacting punishment from very iron by rust, from whence humane bloud revengeth it selfe; for being touched therewith it more speedily draweth rust therefrom. And indeed there is nothing which sooner rusteth iron then mans bloud. But this rust because we are purposely falne upon it, it is not altogether unprofitable, though most wholsome to many good effects, as well within as without the body, beyond that which it doth in tinctures. Wherefore it will do no hurt to touch some thing therein in this place, and therein to reveal that which experience hath manifested unto us to be most rare, and most important, but this is handled divers wayes. Take then filings of iron very clean, and besprinkle them with a little distilled vineger, leaving it so in a cave for two or three dayes or other fresh and moist place; and that will all convert into rust, which you shall bruise very subtilly in an iron or a stone morter. Put it in a little pot, and put thereon boiling distilled vineger, stirring it lustily with a staffe or rod of iron, and the vineger will charge it selfe with the dissolution of the rust: turne it by inclination, and put therein other vineger, reiterating that so long, that all the aluminosity and tincture of the iron be dissolved, and that nothing remaines but blacke and dead earths which you must cast away: cause the vineger to evaporate very sweetly, and there will remain a powder of Canneale colour, which the chymists call saffron of iron; which is made also by putting of small pieces of iron to calcine in Glasse makers Ovens for the space of three weeks or a month; and they will reduce themselves to a small and impalpable powder, as dough, red as blood, but it doth not dissolve it selfe in strong waters. There is neither Bole-armonaic, or _Terra Sigillata_, which can compare to them, who know well to practise their proprieties and consemblable effects.