alchemy: rubber (gumma)

alchemy alchymia caoutchouc chemicals chemistry chrysopoeia crystals elastic elixir essence extract fluid formula grimoire gum gumma herbs hermetic iatrochemie india kabbalistic knowledge laboratory lapis latex life magic matters medieval metals milk milky minerals mystery mystic occult philosophers philosophorum plant plastics quintessence rubber sap sign silicone spagyric stone stuffs substance symbol synthesis tetrasomata transmutation vector vulcanization zauberbuch