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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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PHZSICSE TR ACT. III.
COR OLL.
Finc colligo, praetaros colores
depingi a radiis non parallelis,
proiectis; idque in oppolitas par-
C5; Ced ian rectac, re praetatorum
colorum caulas, ex ordinem de-
MONPEFCMHS.
PROP. CCZCVII.
Radii in prismate traiecto, es in
planum proiecti. nunquum depin-
sunt praefacos colores: nisi post se-
minam refractionem: Vc enim CIE
rna eancum refractio; in primu
prilmacis planum radii perpendi-
cularicer incidere debene, alioqui
in veroque prilmatis plano ACEFC-
Fractio; isitur semina erie retia-
etio; sic ergo obiectum FTI; LInE
radii HIK, IL, perpendiculares; et
xix r6. conlequenter paralleli; cerre mi-
nie Frangentur, in plano AB, Ced
vlEra pEoducenEUE in CD; FEanGCM-
EuEgue in C F, DE; CruInEque C F e
DE paralleli, cum paralleli in pa-
rallelos Franoaneur; Led paralleli
proiecti non depingunt coloresiri-
dis, per P. 296. igieur gemina re-
Fractio requiritur, re scilicet radii
in oppolitas parres proiicianeur, et
praelari colores depingantur: Eline
nicor a quodam secentiore, di-
ctum cRc, viro alioqui ingenios.
simo; unius cancum retractionis
operz, colores iridis depingi à Fa-
diis, in viereo prilmace craiectis;
Tlinc eriam rides, quam recte di-
Ctum sic 2 nobis P. 25. coniuga-
rionem radiorum rix, ac ne vix
quidem rniex retractionis opera
nucari posse; ec vero dum obie-
ctum intra limpidissimam aquam
existens alpicio, obliquis scilicer
radiis, nullo modo murarur illius
nemradij oculo incidant; igieur ad
colorem murandum, una retractio
non sufCit.
PROV. CCXOVIII.
Demonstrari possunt praecipui colo-
res, quos radii. per prisma vitreum
traiecti, ac proiecti, in plano de
pineunt: Ouod ve ad oculum pa-
reat; Sc prilina vicreum CH Z;
obiectum AC; sincque radii CF, F19. 27.
CD, profecti à C, retracti in
PY, DS; EUM IN ZP, SI; IIE
alii AD, AF, retracti in FV, DO;
cum in OL, V NI; Sinc alii protecci
a B, Ccilicer BD, BE, BF, Fracti in
DR, FL, FX; Eum in RK, TM,
ZO; vides, tadios in partem op-
Policam proiectos; hoc es prote-
Ctum aC, in P; X profectumm ab
A, in I; & alsumpro quolibet pun-
Cto in lacere (2, 2d quod ducan-
cur radii ab A, X a C, Temper post
geminam Fractionem, profectus ab
A, TUESIM verSIIS HI, e profectus
a C, deortum rersus P, prosicierur:
itaque hoc ordine colores depin-
SInEuE; in PO, ruber color extri-
berur; in ON, CroceuS; in NIHI,
Aauus; in ML, vicidis; in LK, C~-
rulcus; in RP violaceus ret ianchi-
nuS: aliquandocamen ille rractus,
qui rubro rinctus apparee, peodi-
verlo lumine, quo pertundieur,
vel diversa superticie, quam ha-
bec, magis, vel minus apta, ad se-
Aectendum cadios luminis, diver-
Cum rubrum exhibet; hoc est 10-
Peum, curilum, columbinum; POrtC
ideo pradicti colores depinguntur,
quia radii, post geminamr illat
retractionem, distrahuntur, et di-
verlam coniugacionem induune.
Pro diverla distractione; v. g. OIm-
nes radii profecti a C, legmenro
color, licet post rnicam retractio. D E incidenres, tracti rero, (eg
AIEHLC