The Atlantic Codex (Unknown) - Page 4

⚠The text at the bottom is written in a very small, dense 15th/16th-century cursive script, making some words difficult to distinguish with absolute certainty.

This note explores the relationship between length and strength. To know how much weight a cord can support when pulled straight?, and whether it would be the same if it were two? braccia A Florentine "braccio" or "arm" was a unit of length approximately 58 centimeters or 23 inches. or four? in length. If one had to test the strength of iron or of another metal drawn into wire, make sure that the vessel is perfectly pierced original: "buso"; meaning a hole has been bored through the bottom. at the bottom and that a thin pin closes? it...

sketches of mechanical linkages and tensioning systems

Method of testing the strength of iron wires of various thicknesses. It is done? in this way: one attaches the wire above to a fixed support? and below one hangs a large vessel... Leonardo is describing a tensile test where sand or water is slowly added to a bucket until the wire snaps.

This? motion? is? along? an? equal? line?.

The following text describes the modular ladder system illustrated in the diagram, showing how segments can be joined to reach great heights.

And the top and the bottom are changed? by moving the ladders and interlocking? original: "inmastrandole"; likely referring to a mortise-and-tenon or male-female joint system. one into the other in such a way that they become? as long as shall be necessary?.

Technical vocabulary used in this section:
ladders original: "scale", interlocking them original: "inmastrandole", necessity original: "bisognio", winch original: "argano", crane original: "gru"