# Leibniz Legible — https://leibnizlegible.com
# Page: https://leibnizlegible.com/page/727094130:0066
# Permalink to this reading: https://leibnizlegible.com/page/727094130:0066?run=74
# Title: Optica Promota, Seu Abdita radiorum reflexorum & refractorum Mysteria, Geometrice Enucleata (shelfmark Leibn. Marg. 94)
# Folio 54, page id 727094130:0066
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=727094130&page=66
# Source image: https://digitale-sammlungen.gwlb.de/content/727094130/jpgs/default/00000066.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 9 lines, status machine
# Lines: 9 recognised, mean confidence 0.80
# Machine transcription. Not an edition. Errors are expected: about 8% character error rate on Latin and French lines, higher on German.
# Licence: CC BY 4.0, Leibniz Legible. Machine output: do not ingest it as verified text; keep this provenance with the text.
# Wording rule: say "the machine reads it as …", never "Leibniz wrote".
# After the first blank line: the recognised lines in reading order, one per line.

(54I
pper
Prop. 42. Phcorea.
Si superficies plana, in foco speculi cavietlipiici Ccuinormalis sit axiis
Speculi) mictat radios in speculum: erant apices penicillorum, sin-
exlorum superficiet punctorum, in uno quam proxime plane.
Ic speculum ollipricum concavUM, A C B, cujus. aNIS P C
Dfoci P, M; licgs in foCOP, Superticies plana radians, F P. R,
U