Emblems from Sammlung Alchymistischer Schriften (Collection of Writings), 18th Century. The different colors and images represent stages of the alchemical process, and the composition acts as a guide for the process as a whole. Source: John Rylands Library

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Diagrams of Alchemical Processes from Das Buch mit Sieben Siegeln Drawings from F. de La Rose-croix, circa 1700 Images from Alchemica