Flying_machine_of_de_Groof.jpg (400 × 193 pixels, file size: 16 KB, MIME type: image/jpeg)

Description
English: Man-powered ornithopter that was made by Belgian shoemaker Vincent de Groof's in 1874.
日本語: ベルギーの靴屋ヴィンセント・デ・フローフの人力オーニソプター(1874年)。
Date Unknown date
Source From Gaston Tissandier's 1886 book "La Navigation Aérienne", via Project Gutenberg(http://www.gutenberg.org/files/28397/28397-h/28397-h.htm).
Author Unknown authorUnknown author
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current12:57, 12 August 2010Thumbnail for version as of 12:57, 12 August 2010400 × 193 (16 KB)Five-toed-sloth{{Information |Description={{en|1=Man-powered ornithopter that was made by Belgian shoemaker Vincent de Groof's in 1874.}} {{ja|1=ベルギーの靴屋ヴィンセント・デ・フローフ<!-- 読み方これで良いか? -->の人力オーニソプ�

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