Text leaf in mirror-script (untranscribed)

An ink foliation reads 23 on this leaf, which is filled with mirror-script laid out in headed paragraphs and carries no diagrams. The Institut de France stamp appears at the right margin. No e-Leo transcription was supplied, so the text is left untranscribed here rather than read from the image; the drawn folios nearby in this run address light and cast shadow. A few lines of smaller writing at the foot are also present but untranscribed.