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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)
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L F C T. VIEL.
edictis colligatur licet, quod oculo, cujus Cenerum O uspiam in
ipsa N aponitur, circa punctum Z. (ipsam Ne praenocato modo
quadrilecans) radiantis imago conspicietur. Sit enim puxillae (prout
antehac aliquoties) diameter F F, per eujusce terminos troneane
radiorum L. M, RS reAexi L F, RF; quorum ilte secet ipsum N es in
Y, hic in Z. quoniam isicur radiorum obliquiorum ipso RS,
rectiorum ipso L MI nullus oculum intrabic; uti supra non semel arou.
menrati lumus, intra spatium X P necessario consister imago. quineti- Fi8. 78.
am cum radiorum arcui L R incidencium qui prove punctum L. re-
Aectuntur axi NYa propius adjacentes perpendicularius oculum fe-
riun, idque spissius (ut ex analogia par est exiltimare; nec enim
id operolius aggrediar demonstrare) propter aliquories expolitas
caulas ab eo videbuntur obcutum alticientes radii promanare; hoc est
ad iplum imaso conlictet. Accedir quod ob angustiam puxillx spa-
tium X P Paris modicum existir; uc punctimodum vix excedere vi-
deatur.
XIX. Subdo; si Ctatuatur oculi centrum uspiam in ZN; Ilque ver-
sus partes N obvertatur; objectum contulius apparere; quippe cum
reteririsum convergentes appellane; vel quoniam imago Z tunc pone
vilum consictit.
XX. Iinc a Speculo Cavorantum una repraesenratur lmaso, Palrem
bene distincta. Nam in duorum rellexorum NV∞, R s concursuZ
Ctatuatur oculi Centrum;  sIE RC = Z R∞; Unde RE = 1RX.
itaque spectabitur quae ad C imaso ab oculo in X collocato, vertusque
partes H R obverso; sed cum imago Z post oculum consistit.
XXI. Ethaec quidem recte percepta, serioque perpensa vix addubi.
toquin facile sibi fidem conciliatura Cinc. nihil ut sit opus adversantia
seu vererum Opricorum decreta, seu recentiorum Commenta pluribui
convellere; qua cerre cum nulla perspicua ratione nituntur, tum ab
experientia plerum que discordant. Caerera vero (iqua restant ad hoc
arsumentum spectantia Audio restro commendabimus clicienda; mox
ad e sensibilirer tinica distantia radiantis puncti sympromata limiliter
exploranda animum adjecturi.
Lect. VI.