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# Title: Leibniz-Handschriften zur Optik und Dioptrik LH 37, 2
# Folio 93v, page id 00068531:0186
# Scan: One image of two folio pages side by side, registered by the library under both labels (also fol. 94r); this page is its left half.
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# Lines: 49 recognised, mean confidence 0.97
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Cartesius in Doptricis ita procedit
corpus vel lumen linea AB incidens in medium
noum  CBG. CEG njus superfieres
CE in ipsum impingit secundum duas
dversas determinationes CB et HB
et quidem non obstante medium non opponitur
rectioni IC CB, sed soli directioni HB. ponamus
resistentiam medii  CEG esse duplam
retistentiae prioris medii At H B. patet
pat Utique perrumpendo linteum CBE
(vel irrumpendo in medium, pendet CEG:) perdit
dimidiam suae velocitatis patem, atque ideo
duplum temporis ei impendendum est
ut infra B ad aliquod punctum cncumferentiae (verti gatia 18 vel D)
pertingat (nam id nam spatium B
vel BD
cum linea BI ssit aequalis lineae AB, et relocitas
Sit dimidia prioris, duplo tem nore opus habebit
ad ipsam lineam qualis est BI, vel BD
percuriendam) sed eodem tempore duplicato,
per cum celeritas accedendi sendendi versus E
non fuerit immutata. Sum nihil ex dispositione
qua dextrorsum ferebatur intereat in
duplo istius temporis quo a linea AC evenrat
in AC pervenis ad HB duplum ejusdem contineris
in eandem partem conficere debet, an pro
eodemque momento quo accedit ad circumferentim
infra B etiam accedit ad punctum
posito BE este duplam ipsius CB. ar
proinde si per E ducatur paralleta ipsi AC
nempe FE i eut radius BI refractus
quaesitus. Quod si punctum E cadat
In fac sartesi explicatione extra conul
diametrum seu circulum ut in (E) ita, ut parallela
per E ducta ciculim secare non possit
impossibile est fieri refractionem, et fiet
reflexto perinde ac si superficies CG fuisset
solida
tic occurrunt nonnullae difficultates. Quarum
haec potissima est: si  ceteritas potentia
corpus tee  vel radius tendit a B versus E
nanet illibata integra, sequitur tantum
eotentiam qua tendit a B versus G diidie,
iminui, adeoque fieri duplo minorem. Itaque
quo tempore corpus vetundus percunit CB
eodem percurret BM aequalem ipsi CB. sed
idem ta tempore tantum percurat infra B
ad 9. posito BG esse dimidia ipsius AC
vel saltem dimodium quadratum insi esse