Barrow, Isaac
,
Lectiones opticae & geometricae : in quibus phaenomenon opticorum genuinae rationes investigantur, ac exponuntur: et generalia curvarum linearum symptomata declarantur
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deprehenduntur). </
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<
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">addo, confuſionis evitandæ causâ ſymbolum I
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dehinc in his exemplis perpetuò majorem proportionis refractiones
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dimetientis terminum denotare, quocunque de medio in quodcunque
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peragatur refractio. </
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<
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">porrò, medium primum infringens perpetuò
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denſius intelligatur rariori circundatum. </
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<
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litera C denotat centrum anterioris circuli, K centrum poſterioris;
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<
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xml:space
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">B verticem anterioris, D verticem poſterioris; </
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<
s
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">denuò deſignat Y
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locum imaginis quæſitam.</
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<
s
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">Hiſce præmonitis, primum de longinquo radiantium, ſeu paralle-
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los ejicientium radios punctorum imagines, pro lentium varietate, ſic
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determinantur.</
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<
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<
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<
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xml:space
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<
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152.</
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<
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153.</
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