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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 499, page id 779785487:0557
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18. 48
L1B. TII. DE REF R A CTEONP, _C.
aimmextione. Ceu vieri crassieudine,
plures, vel panciores radii recte.
cuncur, de quo intca.
PROD: LVFII
Si corpus sit perfecte homoceneum
in densitare. nullum radium refte-
etit: Ouia hradius lemel immertus
nullam densitaris diverlam ratio-
nem inuenit, nullo modo incurua-
cur sigieur recta traiicieur; isieur
non refectieur, quid clarius?
PROP. LIX.
Si radins in omnes elobulos per-
pendiculariter cadit, nunquam re-
Rectitur: Ouia nunguam refringi.
EUE, VE Paret; vix camen Reri Do-
celt, ve omnes globuli lecundum
camdem radii perpendicularis li-
neam ita poliri sine, quin vel mi-
nimum Calcem ab ea deflectant; plu-
res camen radii eraiiciuneur, licer
Derpendicularirer non incidant;
nempe licet FPAngnNEUE IN vnO
globulo, in alio caimen in camdem
lincam, vel ipli pocallelam resti-
ruuneur; e vero in his rebus phy-
Eicis lex geomerrica quaerenda non
est.
PROF. LX.
In hac hypochesi, oprime expli-
cari potest, quomodo radius per-
pendiculariter incidens; refectatur;
5.8. 46. Sic enim MP radius perpendicula-
ris, incidens, non retringieur in
nouo medio, led camdem viam
DEOLEGUIEUE VEqLe in F, CUI rO-
Fringitur in F Cr, deinde in GI,
eum in TK, quae est parallela pla-
no incidentiae A C, IOX in R L,
L. +I, IIZ, qua cum cadat per-
pendiculariter in planum A C,
cundem riam prolequicur rsque in
D; vides relexionem Eccundum an-
gulum aequalem.
PROP. L XL
Aliguando reftexio fit a corpore
opaco, modo lauiearum sit; COr-
pus opacum cst, in quo illa ct
FarI e dens mixtio, ratione cu-
ins radii EOrICS FTANGUNEUE, YEEIa-
iicere non polline; porro frequen-
rissimae huius fractionis alia ra-
tionon es, nils talis partiu inIx-
tio, ei Grus, qui cerre rum In COi-
Poreraro, tum in denso, opacita-
tem facie; in sponsia, in spuma,
nOTa Les Cs; netrpe cavicates illx
Tensibiles radios distranunt. in CaF-
bone camdem cationem opacieacis
facile videbis, icemque in Fumo,
nube, e aliis corporibus laxiori-
biis, qualia lune regecabilia, ve
caro, lignum, Rores, FructuS, eEC.
in mecallis alia rario est, pecenda
Ccilicet a maceria muleium herero-
genea; Cunc enim mixta perfecta,
ac proinde ex hererogeneis accu
race mixris constane; praelerrim
29na e terra; in mercurio, cla-
rissima res est; in aliis inde colsi-
gicur, quod per calcinarione, si
debico modoAAE, EI FOFEE FerrUIM
excipias, ex parce Calcem, diapha-
na cusdant; sed calcinatio humo-
rem tantum exprimie; led de me-
tallis luo loco; de lapidibus alia
forre rario cst, quae pecirur a mix-
tione Caris imperfecta; hinc lapil.
lIs qui Ra(CUNEHE ex aCCUTATICTIIL
percolacione, perspicui TunE, YE
adainas, Crystallus, &c. Ced ve ad
propolicum redeam, corpus op2-
cum modo lanigarum sie, opriime
redectic, v. 9. in chalube, ratio est.
quia cum parricula homogenca
in linca reCta nOI OCCMETRHE, Ve
R R L 2
mudin