Porter, Dot2023-05-232022-09-092022-09-092022-09-09https://repository.upenn.edu/handle/20.500.14332/46719Alchemical treatise about the philosophers' stone divided into seven "tracts." Written in Germany in the second half of the 16th century.Alchemy -- Early works to 1800AlchemyCodicesTreatisesManuscripts GermanManuscripts RenaissanceHistory of Science, Technology, and MedicineRenaissance StudiesArticle