Huygens, Christiaan
,
Christiani Hugenii opera varia; Bd. 2: Opera geometrica. Opera astronomica. Varia de optica
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PRÆFATIO.
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ro polygonum eâdem proportione circuli are-
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am exuperat. </
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xml:space
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">Et hoc quidem ut inter ea quæ de-
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monſtraturi ſumus & </
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<
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tione præcipue dignum videatur, alia tamen ſunt
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non accuratiora modò, ſed quæ & </
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bentur; </
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xml:space
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">quæ ſane hic in anteceſſum non recenſebi-
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mus, quippe in ſequentibus rectius percipienda. </
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<
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xml:space
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viter tamen quid ſtudiis Geometriæ conferant ex-
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poſuiſſe proderit, cum non minimam habeant utili-
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tatis commendationem. </
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<
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xml:space
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">Cum igitur duplicem propo-
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ſiti tractationem inſtituerimus, primum eatraden-
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do quorum demonſtratio conſuetis Geometriæ ele-
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mentis contenta eſt, deinde centrorum gravitatis
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quoque conſiderationem adhibendo: </
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xml:space
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quidem illud explicatum reperietur, quomodo non
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tantum circumferentiæ toti, ſed & </
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dato recta linea æqualis invenienda ſit; </
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xml:space
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ratione ad Mechanicas conſtructiones, quæque vel
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ſubtiliſſimas earum minime fruſtretur. </
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<
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xml:space
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<
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item numeros exercentibus peripheriæ ad diametrum
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ratio, quam Archimedes ex polygonis laterum 96
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eruit, per dodecagona ſola comprobari queat. </
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xml:space
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polygonis autem laterum 10800, cum iis qui vete-
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rem inſiſtunt viam vix hi peripheriæ termini exi-
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ſtant 62831852 & </
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">62831855, ad diametrum par-
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tium 20000000, noſtrâ Methodo iſti prodiiſſe cer-
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nentur, 6283185307179584, 6283185307179589;
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</
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<
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numerum, quacunque laterum multitudine </
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