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# Title: [Lectiones XVIII, Cantabrigiae in Scholis publicis habitae] Lectiones XVIII, Cantabrigiæ in Scholis publicis habitæ (shelfmarks Leibn. Marg. 0; ZEN Leibn. Marg. 0)
# Folio 22, page id 797435492:0042
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Tpotheles Opticae primarias, ee fundamentales quali leges
expoluimus hactenus, e excustimus quomodocunque: Se-
guitur jam ut ex iisemersentia quaedam (ad apparentiorum caulas tam
vere quam expedite discernendas conducentia) subjunsamus corollaria;
de caeteris quae faciliora videntur, aut ulum prae se terune porissimum
Teligentes. Radios aurem jam consideramus, ut unica dimensione prx-
diros (liquidem reliquae, quibus Physice saudent, parum faciune ad
compurationes hic institutas) ut lineas, inquam ceu velgd: Hc, rectas
concipimus à lucido quolibet aut aspectabili puncto dimanantes. Ouin
cum, hoc admisso, linguli cujulque radii inflectio in superticie per-
acatur ad planum inflectens recta (uri constat e praemissis) cum e no-
bis pexeserrim mox insticurum sic lingulorum punctorum radiationes
consequentia (ymptomata sic expendere, ur locos ipsorum apparen-
tes determinemus, oculi respectu centrum habentis in ejusmodi
plano uspiam constitutum; pro planis ubique rectas lincas, pro Sphx-
ricis superficiebus peripherias circulares, pro reliquis lincas respectire
coneruas, brericari consulentes ee perspicuirati, substitnemus. POrro
cum quo praecise modo perasatur vilio, quibulque praedica Cit affecti-
onibus adhuc expolitum non sit; Fit de illa tamen subinde crassius ali-
quid ac generalius dicendis intexere Forrassis ex usu fuerit, illa Paltem
perrulsaca, Post hac curiolius expendenda, jam weonex Jonus adsume.
mus; nempe: Vilibile punctum in illo radio licum axparere, qui pro-
cedens ab ipso (directe vel inflexe) centrum oculi permeat; proindéq;
Titum objectorum e radiorum ita transeuntium politione judicari. Ma.
jora, minora, vel aqualia videri objecta, prout iplorum extrema pun
eta radiis cernuntur angulos ad oculi centrum respectire majores, mi-
nores, aut aequales constimentibus; distinctam unius cujusque puncti
vilionem radiis effici modo naturali, hoc est, dliversenter, oculo illa-
bentibus; FF ligna sunt his agnara paricer obria, icu manifecta.
Ouinetiam verborum parci, rocabulis passim receptis se ulitaris deti-
miendis aue explicandis abstimentes, iptorum supponimus intelle-
Cum.