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A rectangular engraved vignette depicts an interior library scene. On the left, the goddess Minerva The Roman goddess of wisdom, medicine, commerce, and the arts—a fitting patron for a chemical library. is seated, wearing a helmet and holding a spear; her shield, emblazoned with the head of Medusa, rests against her seat. Above her head is a small banner with the English inscription: "It profits without harm" original Latin: "Prodest sine detrimento." This motto suggests that the knowledge contained within—specifically chemical or alchemical—should be used for benefit rather than destruction.. Behind her are floor-to-ceiling bookshelves filled with books. In the center and right foreground, two putti are seated on the floor; one adjusts or points to a terrestrial globe while the other looks on. Mathematical and architectural tools, including a ruler and compasses, lie on the floor near them. In the background, an arched opening provides a view into another room or a courtyard.