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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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L1B. TII. DE REERACTIOHE, QC
DROD. ZL IT.
Fine data mediorum ratione, da-
roque quolibet aneulo incidentrae, de-
finiri pol est angulus refractionis: Ouia
caca Mrediorum rarione, e daco
radio difFusO, pCE LaTUM TanCIIM,
Eciri porest longirudo radii, ab co
dem lucido distusi, per densum ran-
tum, per P. 2. Pexterea Cciri porest
longicudo seomenti deno immerti,
cogniro Leomento, quod raro im-
mergitur, per P. 10. 4 16. igieur Ac-
ri porest elliplis, terminans praedi-
ctam porrionem luminis, in medio
denso. per p. 40. icemque exiildem,
dari porest alia incerior, distimilis
exteriori, ve dictum est ibidem, sci.
rique porest, quantum arcui maio.
tis detrahi debeat, ad componen.
dam proportionem, arcuum lecto-
rum a iadio oblique incedente,
cum proportione radiorum, per p.
41. Ted ex tris habetur angulus re-
Fractionis, vE ConstaE. OUaICS,
quomodo hrabeatur seomentum im.
inertum denso, sive breuius, teri-
racum Scilicet ad inceriorem ellip.
Tim, Cive longins, ad CXtCrIOLCIM;
contule pro hac sc p. 16. Dicesibi
Tuppolicam ellerationem octuplam
denlicarum; Sed perinde est, luppone
enim quamlibet Larionem, pro Hac
enim valet eadem regula, quam
videlis, nec enim hicrepetere vacat.
 le e 1.  1L
Daro angulo refractionis, respon-
dene daro anoulo incidentiae, es da-
10 alio anculo incideniia; invenire
anculum refractionis ipsi responden-
tem inxta Bypothesim Carresianam:
Carrelius hoc problema, in Cua hy-
Porheli luminis, de qua luo loco
actum est, Poluere conarus est, id-
que Facili modo; vult enim, polica
eadem mediorum difterentia, linum
rectum complementi, cuinslibet an
euli incidencix, esse ad linum re
ctum anouli refracti, ve linum se-
etum complementi, criusibet al-
terius anguli incidencix, ad linum
rectum Cui anguli refracti; v. 8. SIt
radius incidens DBR; angulus inci. 118. 24
dentia ABD; angulus complemen-
Ei DBF, vel iphi aqualis LIBR; au-
oulus retractus FIBI, Sinus rectuS
RuiuSME, illinS veTO, RL; sit quili-
bec alius anoulus incidentiae ABT;
complementiTBF, vel ipi aequalis
HIBK; cuius linus rectus (ITRY;
angulus aurem refractus, ipsi rel-
Pondens, IIBP, _ linus rectus hu-
IUS PZ; VulE pExdictus auttOL, RV,
eAe ad PZ, VF RL, ad TM, camdem-
que Ceruari proporcionem in aliis
angulis incidenria, ita ve li ratio
RV, PX, SE Celquicerria, cadem quo-
que SIEFatiO RL, TM, acque adco
quilibet sinus rectus complemenci
anguli incidencia, sic ad tinum se-
ctum anguli retracti sibi compe-
centis, ve 4. 2d 3. hoc iplum est
quod praetarus auror demonstrare
ConatuE, Sed ex Falla hypocheli, _
Falsis principiis, ve octendam intias
ve aucem in rostes hypochesi pra-
miltum problema Coluatur; suppo-
nerer Forre aliquis primo, quemli-
bec anoulum retractionis crelcere,
retractum vero decrelcere, rbi crel-
cit denlicas medii; nempe vbi me-
dium, in quod oblique incidicra-
dius, densus est, maior es angulus
retractionis, per p. 3 9. Sccundo den-
lirarem crelcere posse in intinicum,
id est dari posse corpus densius, et
densius in ininicum; certio, nun-
quam radium refractum COnCUI
iere cum perpendiculo, quandiu
densicas finica est; quia scilicee
Pohet adhuc crelcere dentitas, nec
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EBIEM