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Three-tiered symbolic diagram of the art of alchemy: top level, symbols of the states of matter; middle level, cabalistic diagrams; lower level, the two techniques of alchemy: distillation and calcination. Engraving by R. Custos, 1616.

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Three-tiered symbolic diagram of the art of alchemy: top level, symbols of the states of matter; middle level, cabalistic diagrams; lower level, the two techniques of alchemy: distillation and calcination. Engraving by R. Custos, 1616.