# Leibniz Legible — https://leibnizlegible.com
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# Title: Optica Promota, Seu Abdita radiorum reflexorum & refractorum Mysteria, Geometrice Enucleata (shelfmark Leibn. Marg. 94)
# Folio 14, page id 727094130:0026
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=727094130&page=26
# Source image: https://digitale-sammlungen.gwlb.de/content/727094130/jpgs/default/00000026.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 17 lines, status machine
# Lines: 17 recognised, mean confidence 0.91
# 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.

ep cheorema.
Si fas  axis ellipsnsa duorum diaphanorum, ad distan-
ta scorum ejusdem, n Distantia focorum TErperbola, act sui
axem feritq o superficies refractionis Radiorum ex foco
suo exteriore, in diaphano rariore existente: Omnes dicti radii, per
refractionem in superficie densioris diaphani, ad Parallelismum re-
ducentur. Voceur autem hac hyperbola; hyperbola Densitatis prae-
dictorum Diaphanorum.
IE uE AC, axis Fllipreos dentiracis duorum diaphanorum
 quorumcunq; A R C, ad BD, distanciam Focorum, ICa P. FI,
distancia Focorum hyperbola, ad L. II, axem ejuldem : CIcgs Hy-
perbola TP. Y superticies refractionis, in quam incidat Radius E I
ex foco exteriore P, in diaphano rariore exittence, in punctum li
exictens in superficie diaphani densioris, _ retrangatur linea L. L
InZ, ica uE angulus IZ, Cc angulus retractionis: Dico IZ.
ese Parallelam axi Hyperbolx ENEH. Ducatur enim per
puncum