alchemy: lead (plumbum)

alchemy chemistry lead plumbum nigrum saturn seven ancient metals inferior metal prima materia imperfect matter black plumbing chemical formula alchymia iatrochemie spagyric magic mystic hermetic kabbalistic medieval mystery witchcraft occult sign symbol philosophers stone laboratory elixir of life great deed grimoire transmutation quintessence lapis philosophorum magisterium chrysopoeia tetrasomata synthesis zauberbuch magnum opus chemicals substance minerals matters stuffs poison ore fundamental