Marci of Kronland, Johannes Marcus
,
De proportione motus figurarum recti linearum et circuli quadratura ex motu
,
1648
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THEOREMA XIII.
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Si orbiculus æqualis percutiat baſim cylindri orbiculati minùs gra
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vem; habeat verò impulſum duplo maiorem gravitate ſecunda; ex
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clusâ à cylindro baſi pertranſibit.
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>Nam ſi impulſum habeat æqualem gravitati ſecundæ; per
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12 huius, ſuccedit in locum baſis à cylindro excluſæ: Cùm igi
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tur eadem gravitate detineatur, quâ baſis excluſa; non niſi ab
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impulſu æquali excludi valebit. </
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<
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>Vt ergo exclusâ baſi ipſe
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eluctetur; impulſum habebit duplo maiorem. </
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ſi verò impulſum habeat illâ gravitate maiorem, minorem ve
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rò quàm duplum; exclusâ baſi non totus, ſed pro ratione ex
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ceſſûs plus, minuùſuè à cylindro prominebit. </
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<
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>Priuſquam
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hunc motum orbiculorum finiam; admonere volui, ne quis
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ab uno experimento obiter facto,
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neq;
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niſi omnibus propo
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ſitionibus priùs expenſis, facile pronuntiet: cùm hæ inter
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dum illas limitent. </
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cùm dico orbiculum, ſi alium per
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cutiat ſibi æqualem, illo expulſo quieſcere; id non prorſus ve
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ritati conſonum videbitur, ſi experimentum fiat in orbiculis
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magis ponderoſis: cuiuſmodi metallici, ex argento, ferro, ære,
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plumbo, ſtanno, auro. </
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<
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>Percuſſo enim æquali non quieſcunt,
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ſed aliquantulum ex illâ plagâ ſequuntur: idq magis minùſue
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pro ratione ponderis. </
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<
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>Quod quidem ad finem theor: 6 monui
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Quia nimirum rationem cylindri habent eiuſmodi orbiculi:
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ponderoſus æquivalet cylindro longiori. </
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diffe
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rentia plagæ in his maior; quæ in orbiculis levioribus evane
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ſcit, & ob exiguitatem ſenſum latet. </
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<
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>Idem fit in globis magni
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ponderis & molis. </
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>Quia vel centrum gravitatis non eſt idem
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cum centro molis: vel quòd ſuperficiem minùs ſphæricam
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habentes non in puncto, ſed parte aliquâ dividuâ ſe tangunt, </
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