Barrow, Isaac
,
Lectiones opticae & geometricae : in quibus phaenomenon opticorum genuinae rationes investigantur, ac exponuntur: et generalia curvarum linearum symptomata declarantur
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xml:space
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">_Præceſſerat an_-
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_teloquium oc_-
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_caſioni, quæ_
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_fui@, adap@a_-
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_tum_.</
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ctus Rhetoricum, ad muneris mei proprium opus ac-
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cingor. </
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<
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xml:space
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">Imprimis autem novi quod inîerim conſilii
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rationem, paucis expediam. </
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<
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xml:space
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">Cum prius inſtitutum ur-
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gens adverterim, occurrere pleraque nimiam attentio-
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nem deſiderantia, nec ex improviſo auſcultantibus, in-
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dè ſatis opportuna; </
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>
<
s
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xml:space
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">incommodum etiam illud à puram Geometriam
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attrectantibus haud poſſe declinari; </
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<
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">conſtitui, derelictâ tantiſper
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iſtâ, protinus in amæniores (floribus nempe Phyſicis depicto, & </
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fructibus conſitos Mechanicis) mixtæ quam appellitant Matheſeos
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Campos deviare; </
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<
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">Opticæ nimirum, Mechanicæ, Coſmographiæ, re-
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liquæ cujuſcunque, prout occaſio feret, & </
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<
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<
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que tamen animus erit ullius ex his longè diffuſa latifundia pervagari,
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vel extremos fines circumire; </
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<
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xml:space
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">ſed ad ejus quaſi metropolim è veſtigio
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rectà procedere; </
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<
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xml:space
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">primas tantum hypotheſes excutere, præcipuáque
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(quibus illa tam vaſta theorematum moles incumbit) fundamenta de-
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nudare; </
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corollaria ſubtexere. </
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& </
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">quum è principiis rectè poſitis, probéque
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perceptis reliquorum & </
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naſcantur.</
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<
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<
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</
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<
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Naturæ ſimul detegendis arcanis, ac explicandis Phænomenis minimè
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vos latet quantopere conducat; </
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<
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">neque minus ad Aſtronomicas rationes
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quàm planè neceſſaria ſit; </
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<
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alias eximias Artes taceam; </
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ac prineipia ſua mutuantur. </
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