Huygens, Christiaan
,
Christiani Hugenii opera varia; Bd. 2: Opera geometrica. Opera astronomica. Varia de optica
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THEOR. DE QUADRAT. HYPERB. &c.
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<
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Fig. 5.</
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ponantur ea quæ priùs, & </
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& </
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">totius diameter ſit B D F, in qua erit quoque centrum
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grav. </
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Arch. de
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Æquip.</
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ſectorum centra grav. </
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<
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">G, erit ſicut ſector D A B C, ad ſecto-
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rem D A F C, id eſt, ſicut arcus A B C ad arcum A F C, ita
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G D ad D E : </
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">verum ut arcus A F C ad {2/3} A C, ita eſt D
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Arch. de
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Æquip.</
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ad D G, ſicuti modò oſtenſum eſt; </
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portione perturbata, ſicut arcus A B C ad {2/3} A C, ita erit
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D F vel B D ad D E . </
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">Conſtat itaque quod in
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Elem.</
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lo & </
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">ἘΞἘΤΑΣΙΣ
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CYCLOMETRIÆ
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CLARISSIMI VIRI,
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GREGORII à S. VINCENTIO, S. J.</
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Geometriâ celeberrimus, Gregorius à S. </
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centio, quatuor modos propoſuit quadrandi Cir-
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culum, unum vero eorum etiam Quadraturæ Hy-
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perboles applicavit: </
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ipſo exiſtimari ex multis indiciis colligere licet. </
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hoc ipſum quod duas diverſarum figurarum quadraturas per
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eundem hunc demonſtravit; </
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">alterum quod evidentior multò
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ſit hic modus quam reliqui tres, ideoque minus errori obno-
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xius videri debuerit; </
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co produxit; </
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">Et denique hoc maximum eſt, quod in iis quæ
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@d lectorem in principio totius operis præfatur, ubi ſuæ </
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