Anonymous; pseudo-Roger Bacon (attributed)

Late-sixteenth-century Italian manuscript on making gold with oil of antimony, followed by a Latin text 'De antimonio' ascribed to Roger Bacon that the catalogue notes was printed in 1672 as 'Liber secretus' under the name of Artephius. Unique manuscript: a handwritten codex held in the Wellcome Library's Western Manuscripts collection, so no second copy of this particular text-witness exists. Digitized by the Wellcome Collection and released under its Public Domain Mark.

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