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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 47, page id 797435492:0079
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# Lines: 33 recognised, mean confidence 0.91
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L A
Blolutis iis, quae radiis accidunt ad planam superficiem in
LaAexis (obserratu quae videbantur non indigna, cumque prin-
cipuis nostris coheerentia; gux denuo viam sternebane, aut metho-
dum aperiebane sequentibus) ad curras jam gradum promoremus;
circa quas equidem covicaram communia quaedam delibare; verim
exculla re, tam exilem illam ex abstractam deprehendo, Patius ut
existimem accurum ad particularia descendere. curvarum urique prin-
cipem. _ad praxes Opticas lonse paratiltimam, Superficiem Sphae-
ricam aggrediar e restisio. Pro qua ramen, ob caulas pridem assigna-
tas, circulos subrosabo per oculi Sphxreque centra, perque singula
radtiantia puncta trajecios. ex quond hos Caroptrica primo, D.op-
erica poltmodum exequemur. Ad illa.
II. Praesternemus autem anpeucanor unum vel alterum; hoc impri-
mis: Incidentium circulo radiorum obliquior est, qui magis à centro
distar; vel qui minorem arcum (sublemicircularem) suibtendit. Sci-
licer oblignius incidit recta QRS, quam recta MHF. Iam a
CenErO C dueantur C. HI, C P; _CR; C. S. _ quoniam angulus.
RCS angulo A C P Chypochesi nimirum insistendo) minor est;
patet reliquos CRS, CS R reliquos CH, P, C D N (cumjunctim,
cum sinoulum Cinsulo) majores esse. Cum itaque semidiametri:
C R, C. N, circumterenrix perpendiculares linc; omnino liquet pro-
potitum.
III. Daco radio M X ad circulum incidenti coneruum reftexum
resignare.
Variis modis hue Facile peragitur; quorum nunc unum adhibere.
eune alium ex ulu lic. nos unum aur alcerum ex expediroribus actinge
uS. i. Incidens M HI protratatur ut circulum denuo secet inP.
de Tumatur arcus NI _ =NI P; exit connexa a NHI ipsius MIN) P
18. 620
restexus, nam à centro C conmexi C. N, marifestum est angulum.
Cd 
EB. 63.