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# Title: Optica Promota, Seu Abdita radiorum reflexorum & refractorum Mysteria, Geometrice Enucleata (shelfmark Leibn. Marg. 94)
# Folio 50, page id 727094130:0062
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# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 38 lines, status machine
# Lines: 38 recognised, mean confidence 0.82
# Machine transcription. Not an edition. Errors are expected: about 8% character error rate on Latin and French lines, higher on German.
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# After the first blank line: the recognised lines in reading order, one per line.

8. FEstJ 115.
50r. 18+
AlH )u5.
UEOR: CBE:: C C: C H; e ob smmilicudinem eriangulo-
EUM C, RO, C, MT, CrIEUE
ereDuE
GR: CM:: GO: CY
GC: GO:: OH:: C T; Si vero punetum
R non rececar mulrum a verrice ellipleos C. (de quibus penicil.
lis nos cancum loquimur) C. C. Ferme aequalis eric iph GH: ap ex
isicur FemcillitI, quas pronime incidie in superticiem planum
Li ML. T NF a quod demonstrandurs CraL.
COrCIa
o  os paralos in speculum cavum parabolicum:
erunt apices pet
illorum, sin
stdido. et
uont visibilis puncterum, in nno
C. Ic Speculum carum parabolicum A C B; cujusaris C C, FOcyE
aM: Per Focum M ducacur planum cui perpendicularis (IC aXIS
GM C. Dico axices omnium penicillorum, ex radiis parallele
incidentibus oreorum, cadere quam proxime in planum P. M T H
perfocum ductum. Sic enim unius penicilli aris CR, perpendi-
cularicer incidens in caram speculi superticiem in punetoR; per
quem, et exem speculi ducacur planum, Faciens communem sectio
nem cum Peculo, parabolam A C R B, ex cujusrevolutione gene-
eacur speculum; cum plano vero L. MI T N, rectam L. M T H: _
perpunctum R, ducacur recta, cangens parobolam, et aXi OcCurrens
Ir O, nemDe  RO; _ ad idem puinctum R, ducatur alia rectu,
P. R, axi CF C Parallela, qua igitur refectetur in focum parabolx
N. seu apicem penicitli radiorum axi parallelorum; ducaturq; ad
verricem speculi C, recta P C, ipsi C R parallela, quaeideorete
aerur in FI, a
cilliradiorum, ipsi C R varallelorums
Guorsac ene assurus t C C, elt aequalis anoulo inci
cencisl lc Cceue angulus resexus CRM, aequalis an
sulo resteroC C H. Trinnsulaisicur C C H, O R M Eum simi
lao