Barrow, Isaac
,
Lectiones opticae & geometricae : in quibus phaenomenon opticorum genuinae rationes investigantur, ac exponuntur: et generalia curvarum linearum symptomata declarantur
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cujuſcunque generis ſcientia, qualitercunque declarare ſtuduimus, & </
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è principiis admodum affinibus elicere; </
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<
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xml:space
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">modo, meâ ſententiâ ſaltem,
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omnium qui legenti ſe vel cogitanti ſuggeſſerunt, ſimillimo veri, cúm-
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que tam rationibus Mechanicis, quàm experimentis Phyſicis, & </
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<
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ipſa rerum natura congruentiſſimo. </
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<
s
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xml:space
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">Neque nulla mihi tunc oborieba-
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tur voluptas, cùm poſtquam inter alios iſta lucis ſymptomata expli-
<
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candi modos hic ipſe ſemet ingeſſerat, eum examini ſubjiciens, Geo-
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metriæ legibus (aliquanto ſanè præter expectationem) adeo quadran-
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tem comperiſſem. </
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<
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">Meæ tamen eum tam fuſe4; </
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<
s
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xml:space
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">diducendi peperciffem
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operæ, ſi quæ doctiſſimus _Maignanus_ hiſce conformia, luculentius
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quidem opinor & </
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">accuratius, pertractavit, priuſquam hæc aggrederer
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contigiſſet inſpexiſſe; </
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<
s
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xml:space
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">penes quem extare multa nil dubitem (nec enim
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eum adhuc curioſiùs evolvi) ſupplendis his, & </
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data. </
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<
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">Porro fuit etiam animus, alias, quæ plurimæ traduntur, horum
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rationes percenſere, ac perſtringere (quarum mihi nonnullæ craſſâ
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petitione laborare; </
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<
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">multùm aliæ à re propoſita abludere; </
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">quædam
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animum ſubtilitate potius confundere, quàm vi conſtringere videban-
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tur) verùm etiam huic exponendæ nimiſquam immoratus, hactenus in-
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ſinuatis contentus, omnes tranſiliam; </
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">illius ſaltem eruditiſſimi viri
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nefas fuerit non aſtipulari penitus, & </
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"um unicum & </
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">Optimum Naturæ Architectum, hanc (ait) legem ra-
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"diis diverſa media permeantibus præſcripſiſſe; </
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<
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xml:space
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">ut omnes omnino
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"radii veri, & </
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">apparentes eandem ſemper inter ſe ſervent analogiam.
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">His, inquam, dimiſſis, ſuccedit ut è præſtructis emanantia quædam
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Poriſmata ſubnectamus.</
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