Barrow, Isaac
,
Lectiones opticae & geometricae : in quibus phaenomenon opticorum genuinae rationes investigantur, ac exponuntur: et generalia curvarum linearum symptomata declarantur
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lari AB conſtituto, non in ſuo loco (quod juxta dictam ſententiam
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oportuit) aſt pro mediorum diverſitate, (perquam ſenſibili inter vallo)
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citeriùs adſpectatur, aut ulteriùs. </
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<
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xml:space
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">Sed effatum hoc noſtrum (eíque
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quoad reliquos in Catoptricis, Dioptricíſque caſus ſimiles conſona)
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tametſi novitium, & </
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<
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xml:space
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">nullâ quod ſciam hactenus auctoritate fultum,
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cùm forſan expoſitum dilucidiùs, tum penitiſſimè dabimus confir-
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matum, ſi quando nos de imaginum natura, locóque ſpeciatim
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evenerit diſſertare. </
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<
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xml:space
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">Mihi ſaltem videtur hæc Scientia quoad hanc
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partem ſuam, certè palmariam (utì reperitur hactenus tractata)
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perquam mutila, nè dicam admodùm vitioſa; </
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<
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xml:space
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mus quàm ut aliquouſque ſuppleamus eam, ac ſanemus.</
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<
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<
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rimentum interſeremus. </
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<
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xml:space
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">Aqueæ Superficiei RS (ſtagnanti, & </
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immotæ deſuper immineat objectum HG; </
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<
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xml:space
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">ejus autem punctum G ra-
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dat perpendiculum EF (filum puta candidum, aut ſtylus, cui
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plumbum F appenditur) videbitur itaque punctum G (oculo O) ex
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reflectione in ipſà perpendiculari GB velut ad γ; </
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<
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punctum F (admodum notabili diſtantiâ) citra lineam B γ aſpicitur
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(velut ad φ) id quod ex ſententia noſtra factum oportuit; </
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xml:space
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_ni_, ſequaciúmque doctrinam liquidò deſtruit.</
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<
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ctariam quam vocant (per quam nempe recta linea repræſentatur
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in aquæ fundo conſpicua) lineam deſignandi; </
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(utique non eandem omnes, aſt aliam alii) Chimæram inani ſunt
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operà proſequuti; </
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">de quâ _Carteſius_ ipſe percontanti _Merſenno_ ſic
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reſpondit: </
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73.</
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in fundo aquæ ſit habitura; </
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ginis locus in reſlexis aut reſractis, quemadmodum ſibi vulgò per-
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ſuaſerunt Optici. </
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<
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">lmò verò (tanti viri pace) cùm ſpeciale quodvis
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objectum (per ejuſdem generis & </
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<
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aſpectabile) ſimilem conſtanter exhibeat ſpeciem ſui, ſimili ſitu diſpo-
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ſitam, ſimili præditam figurâ; </
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imago locum ſortiatur; </
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eſt caſum) quotcunque puncta non difficilè poterunt è præcedentibus
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determinari. </
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em refractione ſubnaſcentis phænomeni (quoad ejus intelligo figuram)
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cauſa verè, nì fallor, hinc & </
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planas ſuperficies dicta ſuſſicient; </
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