On making white lead and minium. Now if you wish to make either minium or white lead, take sheets of lead and put them into a new pot, and then fill that pot with very strong vinegar,and cover it,and seal it, and put it in a warm place, and leave it for a month. Then open the pot, and put the material which you find on the sheets of lead into another pot, and set it on the fire. Then stir that colour constantly until it becomes as white as snow; and then take it from the fire, and remove as much of that colour as you wish. That colour is known as ceruse. Put the remainder back upon the fire, and stir this constantly until it turns into minium. And this is why I urge you to stir it constantly; because, if you do not stir it constantly, it will go back into metallic lead. Finally, take it from the fire, and set it aside to cool.