Faded studies of luminous rays, arcs and small devices
Diagrams and notes largely revealed by restoration; further untranscribed text is present
This leaf, described in the source as scarcely visible before its restoration, now shows faded diagrams down the left column and lines of notes down the right, with a dark stain damaging the middle. Scholarly indexing of the sheet ties it to the physics of light (the luminous pyramid, a gilded ball seen by the sun), to Leonardo's studies of motion, force and weight, and to small mechanical devices such as an interlocking joint, a drill and a fire-striker. No transcription is provided here, so the writing on the sheet remains untranscribed. The arc-shaped figures crossed by radiating construction lines are consistent with the sheet's optical subject matter.
On this page
Arc-shaped diagrams with radiating lines
The left column carries a vertical stack of semicircular figures crossed by radiating construction lines. These are consistent with the sheet's studies of light and the luminous pyramid, though the accompanying text is not transcribed here.
Small mechanical sketches
Faint small sketches appear in the lower part of the sheet. Scholarly indexing associates the leaf with mechanical elements such as an interlocking joint, a boring tool and a fire-striker, though these details are not transcribed.
Untranscribed notes
Several lines of writing run down the right-hand column, partly obscured by a stain. This text is not included in the bundle transcription; scholarly indexing connects the sheet to Leonardo's treatise on local motion, force and weight.