Martin Ruland Dr Martin Ruland the elder ( died 1603 ) was a follower of the physician Paracelsus . He compiled a dictionary of alchemy and wrote medical works . His son , also named Martin Ruland ( died 1611 ) , was a physician at Regensburg during the 1590s and later at Prague . Ruland the younger was one of Emperor Rudolf II 's retinue at the Habsburg court which during Rudolf 's reign promoted the study of alchemy and astrology . Rudolf II conferred nobility upon Ruland in 1608 . He was the editor of his father 's works . Ruland 's 1612 Lexicon alchemiae ( Dictionary of Alchemy ) is cited by the Swiss psychologist Carl Jung in his writings on alchemy . Books Lapidis philosopici vera conficiedi ratio ( `` The True Method for Completing the Philosopher 's Stone `` ) ( 1606 ) `` Defence of Alchemy '' ( 1607 ) Progymnasmata alchemiae sive probemata chymica ( 1607 ) Lexicon alchemiae sive dictionarium alchemistarum ( `` Dictionary of Alchemy '' ) ( Frankfurt , 1612 ) Categories : 1602 deaths | 1611 deaths 