Proteus mercurialis geminus, exhibens naturam metallorum sive operis philosophici theoriam & ejusdem praxin, sive compositionem lapidis secreti / [Johann Baptist Grosschedel Von Aicha].

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Proteus mercurialis geminus, exhibens naturam metallorum sive operis philosophici theoriam & ejusdem praxin, sive compositionem lapidis secreti / [Johann Baptist Grosschedel Von Aicha]. Public Domain Mark. Source: Wellcome Collection.