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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 407, page id 779782283:0493
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L1B. TII. DE LVCE EF LVMLNE.
Secundum lineas, ipss poris, seu Rexionis leges seruac, quam rilum
Foraminibus parallelas, haud du- corpus, quod reflecti polsic, ve pa-
bic aqua per eadem, line Fractione ter experiencia; igitur cum iuXca
Auec; e licer cadar in planum hanc hypochesim, ceflexio luminis
cribri perpendiculariter, si camen explicari non possie, ill m omnino
Foramiia, vel meacus oblique pro- Fallam esse necesse est; quomodii
cedane, haud dubie aqua Cuum rero luminis rellexio explicari de
Auxum vel curlum infringit; isicur
hec analogia aquae nobis porius,
BeaEEFaC. 4. Fuse dicemus: Dices
S admoneacur ioni, debito modo,
quom aduerlariis favee; porro ve speculum parabolicum; ica colti-
hoc experimencum adhiberi possit,
planum cribri paulo crassius else
sic in foco radios, ve maximus ibi
Calor sentiatur; (i vero loco (pecu.
debet: hoc argumentum iam pres. li, lens rirrea adhibeatur, colligie
Cimus lib. 1. PrOp. 3. d Fuse Cupe-
quidem per retractionem radios,
riore cractatu lib. 5. prop. 10. Scio Ced rix rilus calor in foco senci-
ab aliquo recentiOre alITEF FCEFa-
ctionem explicari, licer lumen Cor-
pulculorum eAunium ese dicat,
Led eius hypochelim intra efficaci-
cer retellemus: dicent Forre aliqui
radium in iplo pori ore, vel octio-
10, relistentiam de dissicultarem
nactum, aliquo modo deflectere,
vnde fractio sequitur; sed profecto
accipi pocest radius adeo rennis, ve
ciera vilum contactum, rect a po.
rum lubeat; quo posico, radium
minime Frangi, necesse est.
Nono, in hac hyporhel, reAe-
xio luminis explicari non porect;
Pro quo Cuppono, corpus humi-
dum ee molle Peu Rexibile disper-
si porius, quam refecti; _c aqua,
EuE; cum tamen secus accidat, si
Tolis radios colligat; igitur lignum
est euidentissimum, calorem illum
propasari in corpulculis, qua a
Tuperticie speculi resiliunt, cum
canen propeer crassicudinem, cry-
Rallum Cubire non possine: Rel-
pondeo ex hoc eninci spiricus ig-
nCOS ab ione eAluere, quis hoc
neget, immo summa vis nostracis
ionis ab his corpulculis derinacur;
X inde verissima ducicur racio, CUE
Per retractionem, Parum augeaEuF
calor, quia Ccilicer retringunEuF
tancum cadii puri caloris, qui qua-
licas est; hinc radii Colares pluri
inum in hoc conterune; quia lon-
se plures lunt: Dices radii directi
qua in planum cadie, quancumuis. ionis, in manu proxime admoca,
laeuigarum, de perpendicularirer,
quoquoversum dispergicur, vepa-
tet experientia; acqui li lumen cor-
puS est, dubium elle non porest,
quin sc Subcilius, mollius, Aexi.
bilius, aqua, ee quin facilius dis-
persi potsic; igitur quamuis in
planum laevisaristimum incidat,
nulla restexionis lege seruata, quo-
quoversum dispergetut; acqui ra-
dius luminis lonse accurarius se.
maiorem caloris vim cciune,
quam radii Colis directi: Relpon-
deo, id caula esse, quod cumm F2-
diis directis nostracis ignis (IC ma-
xima vis halicus ignei, qui cum
aere COIMi(CCTUE, re vinum, cum
aqua, qui purum calorem pluri-
inum invane; hinc radius refr. ictus
Solaris porencior est retracto ignis;
quia cadius retractus purum can-
cum calorem habet; immo rette.