# Leibniz Legible — https://leibnizlegible.com
# Page: https://leibnizlegible.com/page/727094130:0113
# Permalink to this reading: https://leibnizlegible.com/page/727094130:0113?run=74
# Title: Optica Promota, Seu Abdita radiorum reflexorum & refractorum Mysteria, Geometrice Enucleata (shelfmark Leibn. Marg. 94)
# Folio 101, page id 727094130:0113
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=727094130&page=113
# Source image: https://digitale-sammlungen.gwlb.de/content/727094130/jpgs/default/00000113.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 33 lines, status machine
# Lines: 33 recognised, mean confidence 0.84
# 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.

AC F3 E 
A Parallela du
aCUE F F. P: ICCB Llasulorectilinco, CBD:
suli B C. D; Mlaniteltum enselcur iltos angulos, Dempe BCId, B
DC, eNe quaHEOS; eorum enim Cuma, elE angulUS C B A, da-
cuS, & Ginuum ratio, AB, ad B D daca: manifeltum quoq3 elt, aB-
sulum C F A, in circumterentia, esse lemissem anguli CB A, in
CEHETO;
CLIGITUE
aDG WlIS
E CF
QuOMa-
JOF Quae
GCOru.
excedie
Temis-
Tem
TUMMX F. C B, elt Pemitis differentix eorundem angulorum qux-
SEOrum.. Polco igitur C P radio; Ob angulOS ACF, C PF rC-
Ctos; erit A C tangens Cemictis Cummae angulorum quaelicorum,
ec F F, cangens semissis differentix eorundem angulorum; et quia
recta A C, F F, Cunt parallelaes CriE uE A D, Cummatermino-
rum rationis sinnum; ad F D, differentiam corundem; ILA AC,
cangens semissis summae arcuum dacae; ad F F, cangentem semis-
ss differentix; qua addica, ad semissem Cumma dacae, produci-
cur aneulusmajor; vel ab eadem subducta, efficitur anoulus mi-
HOT. Vel, uc F D, differentia cerminorum racionis Cinuum5 ad
AD Cummam eorundem; ica F F, rangens lemistis differentix ar-
cuum datae; ad A C, cansentem semistis summae: qua daca inve-
miuneur arcusurprius. Quod erac Faciendum.
neur linex reCtX CD, CE, C A; 2c9; rectae C
UEC B, (id est AB) ad B D, ita Cinus anguli C D B; ad FInUML An
DiO