Hand-colored engraving. 28 x 44 x 1.5 cm (open). From Philipp Otto Runge, Farben-Kugel oder Construction des Verhaltnisses aller Mischungen der Farben zu einander, und ihrer vollstandigen Affinitat (Hamburg: Bey Friedrich Perthes, 1810), insert after p. 15. The Getty Research Institute, 85-B14127
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