Huygens, Christiaan
,
Christiani Hugenii opera varia; Bd. 1: Opera mechanica
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CHRISTIANI HUGENII
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to plura dicenda habeo, quam quæ hoc tempore exequi va-
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cet. </
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">Sed, ut nova nec inutili ſpeculatione maturius fruantur
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harum rerum ſtudioſi, neve caſu aliquo intercidat, hanc
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quoque partem, præter deſtinatum, cæteris adjunxi, qua
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machinæ hujus fabrica breviter exponitur, ſimulque Theo-
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remata traduntur, ad Vim Centrifugam pertinentia; </
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ctoris Opera
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poſthuma
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p. 401.
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& ſeq.</
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ſtratione ipſorum in aliud tempus dilata .</
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">Horologii ſecundi conſtructio.</
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">Non neceſſarium duxi, ut rotarum, quibus interiora ho-
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Fig. 5.</
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rologii conſtant, diſpoſitionem hic exhiberem; </
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artificibus facile ordinari, variiſque modis mutari poſſit;
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">ſed eam partem explicari ſatis eſſe, quæ motum ejus certa
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ratione moderatur. </
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">Cujus partis hic figura expreſſa eſt.</
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">Axis D H ad horizontem erectus intelligendus eſt, ac
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ſuper polis duobus mobilis. </
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latitudine aliqua prædita, curvataque ſecundum lineam
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A B; </
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">quæ eſt paraboloides illa de qua oſtendimus, Propoſ. </
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">partis 3, evolutione ejus, poſtquam ipſi recta quædam juncta
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fuerit, deſcribi parabolam. </
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vero, ex evolutione totius B A E deſcriptam, refert linea
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E F. </
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">Filum curvæ B A applicatum, cujus extremo puncto
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parabola deſcribitur, eſt B G F. </
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Dum autem axis D H in ſeſe vertitur, filum B G F, in re-
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ctam lineam extenſum, ſphærulam F una circumducit,
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ita ut circulos horizonti parallelos percurrat; </
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minoreſve erunt, prout majori aut minori vi axis D H,
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ab rotis horologii in tympanidium K agentibus, incitabitur: </
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ſed ita, ut omnes in ſuperficie conoidis parabolici continean-
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tur. </
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<
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">Atque hoc ipſo æqualia ſemper circuitus tempora eva-
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dent, ut ex iis, quæ de hoc motu poſtea dicemus, appa-
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rebit.</
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<
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miſſes notare velimus, oportet latus rectum parabolæ E F
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eſſe 4{1/2} unciarum pedis Horarii noſtri, hoc eſt </
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