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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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PHIXSIC F TR ACT. III.
Decimd quinto obseruabis, ex
hris alia posse Facile intelligi, om-
nelque difficultares maxima Facili.
eare lolui polle ex lupra iactis
principiis, cum eamen prins inta-
perabiles viderentur; et veroin
hoc peilmare, ita optica cum phy-
lca ludic; ve rix alibi tam arctus
veriusque nexus inveniatur; de ve
Purus geomerta in ce colorum Cx-
curiet, i a purus Philolophus intex
rot retractiones lacentem non in-
venice veritatem: Porio prilmara
diner generis esse poltuIE, Parione
Scilicer balis, quae vel crilarera cst,
vel quadrilatera, vel polygona; (I
trilarera, cor erunt prilmatum di-
uer(ae raciones, quoc eriangulorum;
E polygona, vel quinque lacerum,
vel lex, vel seprem, ac. vidimus
aliquando crustallina illa prilmata,
Sponce nata, quorum balis exagona
ett, quae praedictos iridis colores
accurarissimé extribebane; scd de
his Paciso
PROD. CCCVTI
Vitrea lens, s paulo maior est, eo-
lores iridis exhibet: Ac enim gemi-
ta retractio, Ceilicet in immersio-
me, de emertione radii, idque in
orbem, circa limbum lenris; 10-
dicum Egurae, rem ob oculos ponit;
sic enim fectio praedictae lentis
Fi8 29. Verimque COnVexA CFHE; CEFa-
dius AB, Fractus in BC, eum
In CI, sE aliuS DK, FraCUS IN RL,
rum in L. I; SC aXiSIHIG, circa
quem roluarur praedicta sectio, do-
nec inceorum orbem decurrAE, CeF-
ce hae dux Fractiones in gyrum sci-
ticer, circa lymbum colores iridis
templaremur; idem dico de Vene-
extribebune: quories praetatos co-
re: porro ratio huiulmodi colo-
rum ex lupra dictis facile incelli-
situr; nempe duplex illa refractio
radios facilè distrahie; hinc diver-
la coniusatio; hinc divertus co-
lor; haec tancum indico; quae iam
Luxra Fuse Caris explicui.
lores vidimus in margine luna,
PROP. CCCVTII.
Ex dictis, facile explicari potest,
quomodo in cylindro vitreo, aqua
pleno, colores iridis generentur, per
proiectionem: Sic enim cylindrus
horizonci parallelus, lcque eius
circulus centro FI, radio Polari pa-
rallelus; incidat radius AB, Pau - Fi8. 5.
lo obliguius, retringieur in BD,
dum illam adhibiro redelcopio COn=
tum reRectieuE in DL, denigue re-
Fringitur, e colores proiicie in H;
incidat alius radius AI, retrinoi-
cur inTC, tum reRectitur in OC,
turm in CB, cu demum colOres
pronicit in R, POs alterain FCFFA-
ctionem; ratio huiusmodi colo-
rum est nona tadiorum coniuoa.
tio, quae sensim ex diverla radio-
rum distractione reluleat, e Rxc
ex diverla retractione, haec demum
ex diverla incidentia, quae in sin-
sulis circuli punctis divecla cA;
sed hoc paulo port explicabimus
in ampulla vicrea sphaerica, hic
tantum obseruabis, non minus
praetatos colores proiici, lve ca-
danc eadii in peripheriam plani et.
lipeyci, quod relultar ex sectione
obliqua cylindri, huc in periphae-
riam circuli, ve dictum est; naM
in veroque, sinsula puncta inci
derEiaMI MMUCANE.
d alclis subtie rliurta
in ampulla vitrea colores iridis vi
DeaBFs;
100
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