Text leaf in mirror-script (untranscribed)

The recto of this leaf is covered with Leonardo's right-to-left mirror-script, set out as several short paragraphs with a few brief headings; the opposite half of the opening is left blank and no diagrams appear. The bundle supplied no e-Leo transcription for the leaf, so its wording is left untranscribed here rather than read from the image. The drawn folios elsewhere in this short reunited run treat the behaviour of light and cast shadow, the likely context for these notes. The handwriting is well preserved and legible.