![Figure 1.](/ServeContent?url=http%3A%2F%2Fdbm.sagepub.com%2Fcontent%2F4%2F1758736013499770%2FF1.medium.gif)
Figure 1.
A reflected cutout from Leonardo da Vinci’s Codice sul volo degli uccelli. The concept ilcentro della resistentia is highlighted. The restored manuscript is stored in the Biblioteca Reale di Torino.
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A reflected cutout from Leonardo da Vinci’s Codice sul volo degli uccelli. The concept ilcentro della resistentia is highlighted. The restored manuscript is stored in the Biblioteca Reale di Torino.