Huygens, Christiaan
,
Christiani Hugenii opera varia; Bd. 1: Opera mechanica
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CHRISTIANI HUGENII
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2 a = b; </
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<
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xml:space
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">hoc eſt, ſi triangula affigi intelligantur in B, quod
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<
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<
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.</
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longitudinem A L ſecet bifariam, erit y =
<
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>
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quæ æquatio docet, quod ſi centro B, radio qui poſſit du-
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plum B A, circumferentia deſcribatur, ea erit locus baſium
<
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triangulorum acutiſſimorum B C, B D, quorum nempe,
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ex A ſuſpenſorum, centrum oſcillationis erit L punctum.
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</
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<
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">Cumque & </
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">circulus totus, & </
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<
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xml:space
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">ſector ejus quilibet, axem
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habens in recta A L, ex hujusmodi triangulorum paribus
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componatur, manifeſtum eſt & </
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<
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xml:space
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">horum, ex A ſuſpenſorum,
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centrum oſcillationis eſſe punctum L.</
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</
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<
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<
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xml:space
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">Adeoque quilibet circuli ſector, ſuſpenſus à puncto quod
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diſtet, à centro circuli ſui, ſemiſſe lateris quadrati circulo
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inſcripti, pendulum iſochronum habebit toti eidem lateri æ-
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quale. </
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<
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">Atque ita, hoc uno caſu, absque poſita dimenſione
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arcus, pendulum ſectori iſochronum invenitur.</
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">Porro, ad univerſalem conſtructionem æquationis primæ,
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">TAB.XXV.
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Fig. 3. & 4.</
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y =
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, dividatur A L bifariam
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in E, & </
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<
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">eritque F
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centrum deſcribendi circuli; </
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<
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xml:space
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">radius autem F O æqualis ſu-
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mendus ei, quæ poteſt duplum differentiæ quadratorum
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A E, E F.</
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<
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">Si itaque, ex puncto B, ad deſcriptam circumferentiam
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triangula duo paria acutiſſima conſtituantur, ut B C, B D;
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</
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<
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">illorum, ex A ſuſpenſorum, centrum oſcillationis erit L. </
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Quare & </
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">portionis cujuslibet deſcripti circuli, cujus portio-
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nis vertex ſit in B, axis vero in recta A L, quales ſunt u-
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traque C B D; </
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<
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">centrum oſcilla-
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tionis idem punctum L eſſe conſtat. </
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">Atque adeo etiam cir-
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culi ſegmentorum K O N, K M N, quæ facit recta K B N
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perpendicularis ad A B.</
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<
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xml:space
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">Et hæc quidem de motu laterali planorum, ac linearum,
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animadvertiſſe ſufficiat. </
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ventis centris oſcillationis figurarum rectarum, ſeu quæ æ-
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qualiter ad axem utrinque conſtitutæ ſunt; </
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ſcelis, vel parabolicæ ſectionis rectæ etiam </
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