In 1863 the subject of aviation by vertical screws received a fresh impulse from the experiments of Gustave de Ponton d'Amecourt, G. [Please select]
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Epi oinopa ponton. [Please select]
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Messieurs Ponton d'Amecourt and de la Laudelle, we are told--"the one a man of the world, and the other a man of letters"--engaged the services of two skilled mechanics, Messieurs Joseph of Arras and J.' [Please select]
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