Perpetual motion, Illustration of a perpetual movement from the 18th century, Fig. 5, p. 115, 1719, Johann Ernst Elias Bessler: Das triumphirende perpetuum mobile Orffyreanum an alle Potentaten, hohe Häupter, Regenten und Stände der Welt [...]. Cassel: typis Cassellanis exscriptum; sumptibus ipsius inventoris, 1719.
Perpetual motion, Illustration of a perpetual movement from the 18th century, Fig. 5, p. 115, 1719, Johann Ernst Elias Bessler: Das triumphirende perpetuum mobile Orffyreanum an alle Potentaten, hohe Häupter, Regenten und Stände der Welt [...]. Cassel: typis Cassellanis exscriptum; sumptibus ipsius inventoris, 1719