 | Size | Height 290 mm, width 210 mm. | | Watermark | Eagle encircled with crown outside. Watermark not noticed by Drake. | | Comments | Written by Arrighetti; contains drawings, short text. Copied from folio 147v. Relation to the Discorsi: elaboration of 2/09-th-rightangle. | | References | Caverni 1972 344 |
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| | | Folio 57 v (final text) | | 1 | Advertas cur cadentia ex a sint semper una in locis sibi respondentibus, ut o, s, ita ut angulus aos sit aequalis angulo bas. |
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