# Leibniz Legible — https://leibnizlegible.com
# Page: https://leibnizlegible.com/page/727094130:0115
# Permalink to this reading: https://leibnizlegible.com/page/727094130:0115?run=74
# Title: Optica Promota, Seu Abdita radiorum reflexorum & refractorum Mysteria, Geometrice Enucleata (shelfmark Leibn. Marg. 94)
# Folio 103, page id 727094130:0115
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=727094130&page=115
# Source image: https://digitale-sammlungen.gwlb.de/content/727094130/jpgs/default/00000115.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 22 lines, status machine
# Lines: 22 recognised, mean confidence 0.81
# 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.

do
LCobleccu
Datis andens Eranenis sphartets; s ab onrins que antulo, in ta
tns opposium. ducto arcu in mioque tlansulo aquabi: e data ratio-
ne sinus, sesmenti lateris unius trianguli: ad sinum, seementi lare-
ris alterinstriansuli; utriu (que lateris segmenta invenire.
Inc duo eclangula sphaerica, AB. C, F D M, daca habentia, om-
Onis lacera, ex omnes angulos; ee ab uno urriusque angulo nem-
De A _ P. demictancur, in veriulque lacus oppolicum, nimirum BC,
DM, arcus aequales AL, P. O. Sicque data ratio, sinuS arCUSDO,
ad linuum arcus BL. OVaerirur uterque arcus, BL _DO. PO-
HACUT CInUS arCUS A L. Ceu sinus arcuS F.O, (Tune enim ex hypoche
Exquales) X2b: deinde, eodem modo, quo in superiore proble.
mace, inveniatur ee linus arcus DO, e linus arcus BL, in nume-
sis coticis: cumque derur eorum racio, ex hypochesr; Dabitur
valorem tadicis; eLoCDIO, Facile daBUMEAE TelIqUA, GUX INVC-
Dienda eranc.
hinc aequatio; quae reloluras   bus   aCls LLL)
vorsoro
risdem mediis, possunc resolvi ueragi haec. problemata; etiam (
AL, FO, non sivexquales, si decur ratio eorum sinuum.
100.