Jacob Degen's 1808 Ornithopter with Flap Valves, in which the Pilot Stood on a Rigid Frame and Worked the Wings with a Movable Horizontal Bar, from 'Les Merveilles de la Science', published c.1870(Jacob Degen's 1808 ornithopter with flap valves, in which the pilot stood on a rigid frame and worked the wings with a movable horizontal bar, from 'Les Merveilles de la Science', published c.1870 (litho))French School |
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Undated · lithograph
· Picture ID: 1492787
Private Collection / Bridgeman Images
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