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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">FIgura quævis, ſive linea fuerit, ſive ſuperſi-
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cies, ſive ſolidum; </
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<
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xml:space
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">ſi aliter at que aliter ſuſpen-
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datur, agiteturque ſuper axibus inter ſe paralle-
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lis, quique à centro gravitatis figuræ æqualiter di-
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ſtent, ſibi ipſi iſochrona eſt.</
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<
s
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xml:space
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">Proponatur magnitudo quævis, cujus centrum gravitatis
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E punctum, ſitque primo ſuſpenſa ab axe, qui per F intel-
<
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xml:space
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Fig. 3.</
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ligitur hujus paginæ plano ad angulos rectos. </
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<
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xml:space
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planum erit & </
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<
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xml:space
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<
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xml:space
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">In quo ſi centro E, ra-
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dio E F, deſcribatur circumferentia F H G, ſumptoque in
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illa puncto quovis, ut H, magnitudo ſecundò ſuſpendi intel-
<
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ligatur ab axe in hoc puncto infixo, atque agitari, manente
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eodem oſcillationis plano. </
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<
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xml:space
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">Dico iſochronam fore ſibi ipſi agi-
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tatæ circa axem in F.</
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<
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<
s
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xml:space
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">Intelligatur enim dividi magnitudo propoſita in particu-
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las minimas æquales. </
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<
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">Itaque, quia in utraque illa ſuſpenſio-
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ne idem manet oſcillationis planum, reſpectu partium ma-
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gnitudinis; </
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<
s
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xml:space
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">manifeſtum eſt, ſi ab omnibus particulis, in quas
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diviſa eſt magnitudo, perpendiculares cadere concipiantur
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in dictum oſcillationis planum, illas utraque ſuſpenſione oc-
<
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currere ipſi in punctis iisdem. </
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quæ apparent in ſpatio A B C D.</
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<
s
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xml:space
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">Quum igitur E ſit centrum gravitatis magnitudinis pro-
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poſitæ, ipſaque proinde circa axem, qui per E punctum
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erectus eſt ad planum A B C D, quovis ſitu æquilibrium
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ſervet; </
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<
s
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">facile perſpicitur, quod ſi punctis omnibus ante di-
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ctis, quæ in ſpatio A B C D ſignantur, æqualis gravitas
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tribuatur, eorum quoque omnium centrum gravitatis futu-
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rum eſt punctum E. </
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<
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xml:space
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">Quod ſi vero, ut fieri poteſt, in pun-
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cta aliqua plures perpendiculares coincidant, illa puncta
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quaſi toties geminata intelligenda ſunt, gravitatesque toties
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multiplices accipiendæ. </
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rurſus centrum gravitatis eſſe E punctum.</
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