Huygens, Christiaan
,
Christiani Hugenii opera varia; Bd. 1: Opera mechanica
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CHRISTIANI HUGENII
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<
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xml:space
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">Cæterum penduli longitudinem, rotis quemadmodum di-
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ximus ordinatis, eam eſſe oportet ut ſcrupula ſecunda ſin-
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gulis recurſibus metiatur, quæ longitudo tripedalis eſt,
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& </
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<
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">Tripedalem
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dico, non alicujus reſpectu pedis qui apud Europæ gentem
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hanc illamve in uſu ſit, ſed certo æternoque pedis modulo
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ab ipſa hujus penduli longitudine deſumpto, quem
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<
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in poſterum appellare liceat, ad illam enim
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omnium aliorum pedum menſuræ referri debent quas incor-
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ruptas poſteris tradere voluerimus. </
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<
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xml:space
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">Neque enim, verbi gra-
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tiâ, ignorabitur unquam venturis ſæculis Pariſini pedis mo-
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dus, dum conſtabit eum ad Pedem Horarium eſſe ut 864
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ad 881. </
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">Sed de hujus menſuræ exactiſſima conſtitutione plu-
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ribus agemus in iis quæ de Centro Oſcillationis. </
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<
s
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xml:space
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">nunc tem-
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pora converſionum in ſingulis rotis indicibusque obiter de-
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ſignabimus, ut rectè omnia ad dentium ſupra deſcriptorum
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numerum quadrare intelligantur.</
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<
s
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">Ergo una quidem converſione rotæ C, decies circumire
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apparet rotam F, ſexagies vero rotam H, & </
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">centies vicies
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ſupremam K: </
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">cui quum dentes ſint quindecim, iisque
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alternatim pulſentur pinnulæ L L, una converſione rotæ K
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numerabuntur ictus 30, quibus reſpondent totidem itus re-
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ditusque penduli V X. </
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<
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">ideoque converſionibus 120, reſpon-
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debunt oſcillationes ſimplices 3600, qui numerus eſt ſcru-
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pulorum ſecundorum unam horam efficientium. </
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ræ tempore ſemel circumit rota C, cumque ea ſimul index
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ad E impoſitus, qui ſcrupula prima demonſtrat. </
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<
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xml:space
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">Et quo-
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niam eodem temporis ſpatio etiam rota ß, & </
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">per eam γ,
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convertitur, cum tympanidio ſuo dentium ſex, ad quem
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numerum duodecuplus eſt numerus dentium rotæ ζ, appa-
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ret duodecim demum horis hanc circumduci, totidemque
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indicem illi conjunctum in θ. </
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<
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xml:space
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">Denique cum rotæ H ſexa-
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ginta converſiones reſpondere oſtenderimus ſingulis conver-
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ſionibus rotæ C, hinc illa, una cum affixo orbe λ, ſexagies
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in ſingulas horas circumferetur, hoc eſt, ſemel unius ſcru-
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puli primi tempore, ideoque partes ſexageſimæ orbiculi </
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