![Codex Urbinas (Treatise on Painting) — 329r.[02.fn.0000]](https://codex.venivididavinci.com/codices/codex-urbinas/highres/641_329r.-02.fn.0000.jpg)
Horizon-index variant: blank recto foliated 329a
Second imaging of the eighth-part index; the photographed leaf is blank apart from its foliation
This is a variant imaging associated with the eighth-part index 'De l'orizzonte' (folio 329r). The leaf actually shown is blank apart from the foliation '329a' in the upper corner, so no writing is visible on it; the transcription attached in the source is the horizon table of contents itself. That index lists nine chapters (936-944) on the horizon, its reflection in water, and the reddening of the air near it.
On this page
The eighth-part horizon index (associated transcription)
The transcription grouped with this variant is the table of contents of the final part of the Treatise, 'Of the horizon.' It runs from the true position of the horizon [936] through further chapters keyed to pages 283-286.
Reflection and reddening in the indexed chapters
The associated index cites the horizon mirrored in running water [942] and in the waves [943], and why the thick air near the horizon becomes red [944]. These are optical and atmospheric effects treated for the painter.