Huygens, Christiaan
,
Christiani Hugenii opera varia; Bd. 2: Opera geometrica. Opera astronomica. Varia de optica
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mittitur. </
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Hyperbolas, Ellipſes & </
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redigere non finis eſt horum Theorematum, ſed
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conſequentia duntaxat; </
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quirens, in hanc incidi quæ ad Ellipſin & </
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culum quoque pertineret, commodumque ob-
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venit conſtans illa in cognatis figuris mirabiliſ-
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que convenientia. </
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mnibus hiſce quo minus locum habeat, ſola fa-
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cit Propoſitionum noviſſima, ſupernumeraria illa
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quaſi, atque ultra propoſitum adſcita, cujuſque
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hoc ſolum mihi tribui par eſt, quod ex præce-
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dentibus ipſam non ineleganti ratione compro-
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venit, egregiumque Theorema ante annos un-
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deviginti demonſtratum dedit acutiſſimus Geo-
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metra I. </
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tiâ, quod ante alios perſpexerit, quomodo à ſe-
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ctorum gravitatis centro Quadratura depende-
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ret: </
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promeruiſſe agnoſcam, non æquè gaviſus ſum de-
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tectâ in reliquis hujus ſegmentis ſimili </
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