Euclid's Staff

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Name adopted by the inventor with reference to the more common cross-staff.



Leonardo da Vinci

Historic Period

c. 1490


This is a variant of the cross-staff or Jacob’s staff illustrated by Leonardo in the Codex Atlanticus (400v, formerly 148vb). Instead of the cross-rod, this instrument has a cross at the end of the main stick, enabling its user to measure heights and widths at the same time, or to overturn a height onto the horizontal plane to measure its dimension directly.

Bibliographical Resources

Leonardo da Vinci. Il Codice Atlantico della Biblioteca Ambrosiana di Milano. Trascrizione critica Augusto Marinoni, presentazione Carlo Pedretti, nota alla trascrizione Pietro C. Marani. Firenze, Giunti, 2006, c. 148vb., 400v.

Links (External) (Italian) (Italian)

Author of the entry: Filippo Camerota

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