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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)
# Folio 428, page id 779785487:0486
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428
PFI YSFCAE
TRACT. IV.
enim AET, aequalis AD, lumen in lumen in BaMFIC, re planum et
D, dE FI, aequale est; lumen enim
diftundieur rniformiter; Ced lu-
inen In FI, est ad lAIIeM iN B, VE
quadracum BA, ad quadracum
FA; re constat ex dictis; ioicur
eadem est rario luminum D, B; p2-
ri modo lumen in C est ad lumen
in B, ve quadrarum BA, ad quadra-
TuI CA, QC.
DROP. ZCVI.
Tline licet assumantur anguli
aquales, qui sustineantur à scemen-
eis semidiametri basis, non erit aeque
intensum lumen, in segmentis, aqua-
les angulos sustinencibus: v. 3. GIC Le-
midiameter DB; Pineque anguli
DAC, CAB, aequales; haud du-
Die leomentum DC minus cs (cg-
HenEO CB, licet aegualis luminis
portio verique distribuarur; igi-
tur lumen in DC intenlius clle,
quam in CB, necesse est; in qua
vero proporrione, incensius lEs
dicam paulo post, res enim sciru
digna esle videTMT.
PROD. XCVTT.
In huiusmodi scemeniis, lumina
sunt et ellipses, sub praesatis ses
F18. 6. mentis : v. 8. SINED AHI, II AC
aequales; sine segmenta balIs DFI,
EIC; allumatur AL, xqualis AD;
cum AI, aqualis AII; Cineque cO-
nI ATTI, ADL, aeguianguli; lu-
WiNa In DL, III, erune ve bales.
vel area circuloruM, PCKILIEAN-
do; aequi si producaneur praetari
lipricum EIC, ad circulare II I3
igicur lumen in bali, vel segmen-
EODII, ad luteM in EEgIMeNEO
HIC, re planum ellipricum FIC,
ad ellipricum DFI; quam VerO FA-
tionem habeant incer le huiulmo-
di plana elliprica, ex geomerria
coni, lecenturque a planoDC,
haud dubie lectio in veroque erie
ellipsis, re pacee; isicur lumen in
Dali DL exir 2d lumen in Ba(DFI.
Facile definies, sunc enim ellip-
VE acca ellipseos DFI, ad arcam cir-
tica plana, ve quadrata, sub me-
diis proporrionalibus, incer dia-
MMCETOS.
DROP: ZCVTII.
Hinc lumen tantum aeque inien-
sum est, in singulis punctis basis,
cum illa est portio sphara actiuitaris:
v. 8. Sc conus luminis AFFI; POF-
tiO SpMREX FOHI; dico in tota hac (15. 2.
bali, lumen aque intensum elle;
quia lingula puncta aeque distane
a CenErO A: praterea altumpris
quibusliber angulis aequalibus, illi
ab aqualibus arcubus CuSTIMENEUE;
igitur aequalis porrio luminis
aequalibus subiectis distribuitr;
isitur aque intentum cst: hinc
omnis radius directe incidens,
perpendicularirer plano incidit;
hine omnes huiurmodi directe in-
cidune; in planum vero rectili-
neum, oblique omnes radii inci-
dunt, ab Codem CCHEEO, VIIIIS FAIL
cum directe incidie, v. g. AMI di-
recte incidic in planum LEL, celique
vero oblique.
PROP. ZCTZ.
Basis, cui lumen incidit, sectio
quaelibet conica esse porest: Y. 8. sIF
conus CAF; S planum collocetur Fig 6.
in CF, balIS erir circuluS; S in
BE, crit ellipAS; A in BD, par2-
bola; (I in BFI, hyperbola; hinc
cudi DC; ex lumem in bahi TFI, ad lumen porest elle incenlius, in
plano