An emblematic seal dedicated to him appears in this work alongside the motto :
In 1618 , Croll was deemed one of alchemy 's heroes in Johann Daniel Mylius ' Basilica Philosophica ( 1618 - Opus Medico - Chymicum , third book ) .
An emblematic seal dedicated to Croll appears in this work alongside the motto :
In 1618 , Croll was deemed one of alchemy 's heroes in Johann Daniel Mylius ' Basilica Philosophica ( 1618 - Opus Medico - Chymicum , third book ) .