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# Title: [Physica, Id Est, Scientia Rerum Corporearum, In Decem Tractatus Distributa] Physica, Id Est, Scientia Rervm Corporearvm, In Decem Tractatvs Distribvta (shelfmarks Leibn. Marg. 7:1-2; ZEN Leibn. Marg. 7:1-2)
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PHXSICE IRACT. IV.
PROP. XZV.
Lumen, post refractionem; modo
radii non sint paralleli, diffonditur
uniformitor, difformiter, in eodem
medio, ita ve recula diffusionis, ac-
cipiatur in aliquo aren linea cuius.
piam curuae; VF F7 3. vel Bd3. ad
quam termineneur omnes radii re-
Fracti, qui Scilicet irrefracti Fer-
minarentur arcu circuli X53. quia
irretracti faciune lumen aeque in-
centum in arcu Z53. de retracti in
Curua F. 8 3. _ huic eadem prortus
quanciras luminis, ve lic loquar,
_ illiinest; igitur in aliqua curua
PucaEs z. retracti, ec Z53 irretracti,
terminantur, cuius respectu dittu-
tionis regula accipitur in COnO.
DROP. ZZVI.
Thinc necesse est. diffusionem
praedictam, dati scilicet luminis in-
tra medium densum, suppositum
raro, necesse est inguam, termina.
ri a superficiei curnae portione: ITam
non cerminacur plano rectilinco ve
constat ciius Scilicet partes Omnes,
 centro diffutonis, vel non aequé
distane, vel lumen xeque incensum
non habene; nec enim aeque inten-
Tum est in B, _ in H; idem dico
de diverlis punctis, cuiustiber al-
rerius plani allumpri: deinde cum
in lingulis radiis diffulio contide-
ZeEUE, in F, _ in s vel 2, lumen
aeque incentum estiiremque in B,
XI. _c. igieur F7 est arcuS CuruA,
ee parec ex dictis.
PROP. ZXVII.
Tsinc diversa sunt cenra, à qui-
bus radii in diffusione luminis, per
rarum sapra, es per densum infras
duci censentur; Nam V. 8. PeF I2-
rum ABZ, regula diffusionis acci-
crum lucidi secundum aFCUS CON=
centricos XY, BY, c. lic lumen
quod est in luperticie BT, ScilicCE
secundum incensionem, cst ad lu-
menVO, requadrarum Va, ad
quadrarum BA; lumen vero HIP,
est ad lumen 4. T, ve quadrarum
Ta, ad quadrarum PA; e lumen
IT, est ad luinen 5. P. ve quadea-
cum PA, ad quadrarum TA; inFem
vero inmedio denlo, accipitue dif-
Fulio ab aliquo centro aequivalen
ce, de quo intra, hoc est radii
retracti a diuerlis centris profecti
CenTeHEUE.
DROP. ZZVIII.
Thinc si radius obligue incidat, ex
medioraro, in densum, sermentum
denso immersum, eidem, cui prius, li-
nea non insistit; Inliltar enim GReri
Porest; lirque radius oblique inci-
dens AZ, sic legmencum denlo im-
mertum Z 8. Certe (I prOduCATUE
Z.8. concurrit cum eadio perpendi-
cutari EA, IN CenErO A, quod est
cencrum lucidi, sed Cx CenErO A Per
puncta F 8. circulus delcribi non
Pocest: aequi ex cenrio circulus
delcribitur, ex centro inquam, in
quo radius retractus productus, cii
Perpendiculari COnCUEFIE, PCF P. 24.
ioitur Cegmeneu denlo immer(uI
cidem linea, Ccilicet productu, non
inlistie, cui aliud seomeneum, quod
per rarum dittunditur insistebor, sed
etto, hoc tantum dicatur ex hypo-
theli, nam intra clarius ostendetur.
PROD. ZXIX.
Segmentum denso immersum line a
rectam facit; Lumen enim per li-
neas rectas diftundicur, in quolibee
radio, Euc directo, line retracto; ec
redlexo, re Tuo loco oltendi; et vero
diffulionis racio hoc iplum postu-
pieur a cenero A, quod eAt cem. lac: adde quoit lumen, quanrum
POFCAE
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