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To Ponton d'Amecourt, La Landelle, Nadar, De Luzy, De Louvrie, Liais, Beleguir, Moreau, the brothers Richard, Babinet, Jobert, Du Temple, Salives, Penaud, De Villeneuve, Gauchot and Tatin, Michael Loup, Edison, Planavergne, and so many others, belongs the honor of having brought forward ideas of such simplicity. Abandoned and resumed times without number, they are sure, some day to triumph.
Ponton d'Amecourt and his steam helicopter, La Landelle and his system of combining screws with inclined planes and parachutes, Louvrie and his aeroscape, Esterno and his mechanical bird, Groof and his apparatus with wings worked by levers. The impetus was given, inventors invented, calculators calculated all that could render aerial locomotion practicable.
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