Huygens, Christiaan
,
Christiani Hugenii opera varia; Bd. 1: Opera mechanica
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HOROLOG. OSCILLATOR.
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<
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ſecunda ſcrupula tranſitu ſuo oſtendent: </
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<
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ſe habere manifeſtum erit. </
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<
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">Pondus X in imo perpendiculo
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trilibre eſt, plumbeum totum, vel ænea ſuperficie plumbum
<
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continente. </
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<
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xml:space
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">Nec tantum metalli gravitate ſed & </
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<
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xml:space
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">figurâ in-
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ſuper proſpiciendum (plurimi enim refert) ut quam mini-
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mum occurſu aëris impedimentum ſentiat. </
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<
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xml:id
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xml:space
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">Eoque in cylin-
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">TAB. II.
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Fig. 3.</
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dri jacentis oblongi & </
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xml:space
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">utrinque præacuti formam fingitur,
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qualis cernitur ad a ſchemate horologii minore. </
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xml:space
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<
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in his quæ ad navigationem parantur, forma lentis erectæ
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aptior viſa eſt.</
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</
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<
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s
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">Porro eodem ſchemate & </
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horologii continuatur, ſuſpendendi ratio expreſſa eſt, quam,
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incognitam prius, inveſtigare nobis neceſſe fuit, ne interim
<
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dum ſurſum retrahitur pondus iſtud, ceſſaret vel impedire-
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tur aliquatenus horologii curſus, quod hic omnino caven-
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dum erat. </
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<
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xml:space
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">Paratur itaque funis continuus atque in ſe rediens,
<
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extremitatibus apte inter ſe connexis. </
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<
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xml:id
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xml:space
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">Is primum orbiculum
<
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rotæ infimæ conjunctum, qui in ſchemate majori notatus eſt
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D, amplectitur; </
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<
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xml:space
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">inde deſcendens, altera ſui parte trochleam
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c, cui pondus b appenſum eſt, ſubit. </
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<
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xml:space
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">Hinc ſuper orbicu-
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lum d aſcendit, extrinſecus horologio affixum, qui ferreos
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per circumferentiam aculeos habet, atque inſuper ſerratis
<
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dentibus ita eſt aptatus ut volvatur tracto fune e; </
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<
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quam vero in partem contrariam revolvi poſſit. </
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<
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xml:space
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">Ab hoc or-
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biculo deſcendit funis ad alteram trochleam f, cui pondus
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exiguum g appenditur, quantum ſufficit continendo majori
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b, ne aliter quam revoluto orbiculo deſcendat. </
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<
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xml:space
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">Namque à
<
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trochlea f rurſus ad ipſum orbiculum D, unde deſcenderat,
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funis revertitur. </
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>
<
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xml:space
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">Quibus ita ſe habentibus, manifeſtum eſt
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ſemper pondus b dimidia ſui gravitate conari ut rotas horo-
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logii circumagat, nec tunc quidem ceſſare cum manu fu-
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nem e trahente aſcendere cogitur; </
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<
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xml:space
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">adeoque horologii mo-
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tum nusquam interrumpi, nec momentum temporis de-
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perdi.</
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<
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ſed quo minor conſervando motui ſuffecerit, eo melius </
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