Barrow, Isaac
,
Lectiones opticae & geometricae : in quibus phaenomenon opticorum genuinae rationes investigantur, ac exponuntur: et generalia curvarum linearum symptomata declarantur
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<
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">NOvum jam ingredior dicendi campum, amæniorem ſanè
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neſcio vel feraciorem, uberrimâ varietate confertum, eó-
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que delectabilem; </
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<
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xml:space
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">& </
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<
s
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">quia primas fermè _Mathematicarum_
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_hypotheſium origines_ recludit (è quibus nempe _magnitudinum_
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_cùm deſinitiones effor mantur; </
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<
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xml:space
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">tum preprietates emer gunt_) neceſſariò
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perquam utilem. </
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<
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">De magnitudinum intelligo generatione; </
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<
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modis, quibus ortæ productæve concipiantur variæ magnitudinum
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ſpecies. </
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<
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">Nec ulla certè magnitudo datur, quæ non innumeris modis
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& </
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<
s
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">intelligi producta poſſit, & </
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<
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ſaltem hactenus uſurpati ſunt, ad præcipua quædam genera referri,
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quorum ſe mihi jam cogitanti ſuggerentia ſunt hæc; </
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<
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">_per motus locales;_
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</
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<
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">_per interſectiones magnitudinum; </
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<
s
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xml:space
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">per quantitate poſitionéque deter-_
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_minatas ab aſſignatis locis. </
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<
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">diſtantias; </
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">per ductus magnitudinum in_
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_magnitudines; </
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<
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<
s
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xml:space
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">per applicationes magnitudinum ad magnitudines;_ </
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<
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_per aggregationem magnitudinum ordine certo diſpoſitarum; </
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<
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_ſitionem magnitudinum ad alias, vel ſubductionem ab aliis; </
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<
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_nicam demum_ (ab horum quocunque deductam, aut ordinatam)
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_effectionem._ </
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<
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alii cuncti quodammodo ſupponant oportet, utpote ſine quo nil pro-
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creari poteſt, eſt iſte, _qui per motum localem._ </
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<
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diſpiciendum. </
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">De motu celebratur illud _Ariſtotelis_ effatum,
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ἁναγμ
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@@ον ἁγνο{ου}μí
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νκς ἁυ@ς (κιν@σεως) ἁγνοε
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@ ηαἱ {τὴν} φύσιν: </
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<
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rato motn neceſſariò naturam ignorari; </
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<
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tramque facit; </
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<
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">nec immeritò, cùm in natura (ſaltem quantùm hu-
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manus intellectus aſſequi valet, aut experientia commonſtrare) quic-
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quid ſiat, à motu ſiat, aut certè non abſque motu. </
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<
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igitur, & </
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<
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">de cauſis, de diſſerentiis complura
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ſubtiliter argutantur Phyſici, quorum ferè _Matbematicis nibil </
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