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Codex on the Flight of Birds
''Codex on the Flight of Birds'' is a relatively short codex of circa 1505〔Pedretti, 37〕 by Leonardo da Vinci. It comprises 18 folios and measures 21 × 15 centimetres. Now held at the Biblioteca Reale in Turin, Italy, the codex begins with an examination of the flight behavior of birds and proposes mechanisms for flight by machines. Leonardo constructed a number of these machines, and attempted to launch them from a hill near Florence. However, his efforts failed.〔Cremante, 53〕
In the codex, Leonardo notes for the first time that the center of gravity of a flying bird does not coincide with its center of pressure.
==Summary==
The following summaries are from the codex whose English translation was prepared by Culturando and Smithsonian Institution.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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