Huygens, Christiaan
,
Christiani Hugenii opera varia; Bd. 1: Opera mechanica
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DE CENTRO OSCILL
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præſentare altitudines, ad quas pondera ſejuncta redeunt.
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">facile probari poteſt illud deductum eſſe
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ex Principio, quod ſibi finxit, & </
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<
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">pro fundamento habet pro-
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poſitionis ſuæ; </
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<
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">ſcilicet, celeritatem totalem Penduli compoſiti,
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quæ inter partes diſtribuitur proportionaliter ad arcus, ques
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ipſæ deſcribunt, ſemper æqualem eſſe ſummæ celeritatum, quas
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eædem partes acquiſiviſſent, ſi ſejunctæ ſingulæ ſeparatim ex
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iisdem altitudinibus, & </
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<
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">in eadem diſtantia ab Axe deſcendiſ-
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ſent. </
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<
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">Ponit ergo, ut me refellat, principium hoc, quod fal-
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ſum contendo; </
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<
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">in demonſtratione computationem memora-
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tam ſequar.</
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<
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Abbas novit & </
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<
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">concedit, detegi altitudinem, unde
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commune ponderum gravitatis centrum deſcendit, ſi divi-
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damus ſummam altitudinum 1. </
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">& </
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">(unde duo pondera ſi-
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mul alligata deſcenderunt) per 2 numerum ponderum, quæ
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ergo eſt {5/2}. </
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<
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">Concedit pariter, dari altitudinem, ad quam re-
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vertitur commune eorum gravitatis centrum, ſcilicet {153/50}, vel
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3{3/503}, ſi per numerum ponderum duo, dividamus ſummam al-
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titudinum {9/25} & </
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">{144/25}, ad quas pondera percuſſione ſeparata re-
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deunt.</
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<
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">Centrum ergo gravitatis revertetur altius quam unde de-
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ſcenderat, quantum 3{3/50} excedit 2{1/2}, quod primario adverſa-
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tur Mechanices Principio. </
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. </
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">Abbas efficere poſ-
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ſit, detectum habebit perpetuum mobile: </
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<
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">Quum ergo ejus
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Principium ex quo falſa ſequitur concluſio, falſum ſit, ex-
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inde nil quo mea labefactetur Propoſitio, poteſt inferri
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vel deduci. </
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<
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">Quod ad alterum ejus Principium attinet,
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quod pro fundamento habet regulæ generalis de determi-
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nandis centris Oſcillationis, in eundem inducit errorem.
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<
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">Hoc Principium eſt, tempus Vibrationis Penduli compoſi-
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ti eſſe medium inter tempora Vibrationum partium, id eſt,
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æquale eſſe ſummæ illorum temporum, diviſæ per numerum
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partium. </
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<
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">In Pendulo, quale conſideravimus, ubi ponderum
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diſtantiæ, a puncto ſuſpenſionis, ſunt 1 & </
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">4, ſi ponamus
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tempus minoris ex partibus ſeparatis eſſe unum, (unde ſe-
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quitur, tempus alterius partis ſeparatim agitatæ eſſe duo;)</
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