Barrow, Isaac
,
Lectiones opticae & geometricae : in quibus phaenomenon opticorum genuinae rationes investigantur, ac exponuntur: et generalia curvarum linearum symptomata declarantur
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aſſimilantur. </
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<
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<
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<
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<
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<
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</
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<
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<
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<
s
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<
s
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">erat autem priùs KF. </
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<
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<
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<
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<
s
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<
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<
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CR. </
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<
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<
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<
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<
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<
s
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xml:space
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">unde (juxta dictum Theo-
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rema) conſtat factum.</
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<
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<
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xml:space
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facilè _Conſectaria_ deducetis:</
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<
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<
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<
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(perpendicularis utique) refractus in K terminabitur; </
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<
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">& </
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<
s
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incidentium refracti ad unas ipſius K partes (ultra nempe vel citra
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K reſpectu centri, pro diverſitate caſuum ab ipſius A poſitione reſul-
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tantium) cadent.</
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<
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<
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conſtructionem reſpuet; </
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<
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<
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<
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xml:space
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poteſt, & </
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<
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">in aliquo reverà caſu contingit) omnes refracti in punctum
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K confluent.</
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<
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ter expanſem; </
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<
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oſtendi; </
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<
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<
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<
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<
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<
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tem, ultra vel citra quem nullus refractus axim interſecat; </
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<
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pendicularis ipſius AB refractum in Z terminari.</
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<
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CK. </
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<
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<
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</
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<
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<
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<
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<
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<
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<
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<
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<
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<
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centri, vel ubi refracti ad axem directè procurrentes convergunt)
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BK&</
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<
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<
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<
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<
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<
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<
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<
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<
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<
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</
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<
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<
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<
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<
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<
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<
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<
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<
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C K. </
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<
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<
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<
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">BK. </
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<
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<
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<
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<
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<
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<
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C Z. </
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<
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<
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<
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<
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<
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<
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<
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<
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<
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adeóque punctum K ſupra Z exiſtit, verſus centrum; </
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<
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poſitum oſtendere.</
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<
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</
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<
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<
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<
s
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xml:space
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<
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<
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A partes à centro averſas cadunt) connectatur ſubtenſa BN, & </
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catur AS ad KN parallela; </
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<
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ipſo BK N, vel BA S; </
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<
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">& </
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<
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&</
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<
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<
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<
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<
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<
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<
s
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">KN. </
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<
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">AS :</
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<
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xml:id
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xml:space
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">: KB. </
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<
s
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">AB. </
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<
s
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">erit etiam hîc
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igitur (ut ſupra)C K. </
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<
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>
<
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<
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<
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<
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