Gravesande, Willem Jacob 's
,
Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1
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MATHEMATICA. LIB. 1. CAP. IX.
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mam dividenda erit, ad detegendam memoratam diſtantiam centri gravitatis a
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plano.</
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<
s
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xml:space
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">Ex hiſce deducimus methodum, qua inveſtigatur centrum gravitatis; </
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rendo bujus diſtantiam a tribus planis . </
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<
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xml:space
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">Quæ eadem methodus ad corpus
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que peculiare applicari poteſt, referendo adhujus partes, quæ de corporibus ſunt de-
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monſtrata.</
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<
s
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xml:space
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">Si Corpora, quorum commune gravitatis centrum quæritur, ſua peculiaria
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gravitatis centra in eodem plano babeant, determinatur quæſitum centrum, dete-
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gendo bujus diſtantiam â duabus lineis , utcunque in eodem hoc plano ductis.</
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<
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<
s
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xml:space
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">Quando peculiaria gravitatis centra in eâdem lineâ dantur, detegitur commune
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gravitatis centrum operatione unicâ, qua nempe ipſius diſtantia à puncto quocun-
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que, in eâdem illâ lineâ ſumto, determinatur.</
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<
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<
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">Regulæ quatuor Arithmeticæ, Additic, Subtractio, Multiplicatio, & </
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libræ ſuperius memoratæ , cujus brachia in partes æquales ſunt diviſa
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cile inſtitui poſſunt, operationumque demonſtratio ex ante memoratis quam
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facillimè deducitur; </
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<
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<
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">Habeatur pondus quodcunque pro unitate; </
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<
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ciæ eodem modo poſſet adhiberi.</
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<
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<
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xml:space
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">Sit numerus 364 libræ applicandus; </
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<
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xml:space
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">tres uncias centeſimæ applico divi-
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ſioni, & </
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.</
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<
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<
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terminamus, ſuſpendendo in centeſimâ diviſione brachii oppoſiti pondus,
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quod augeatur additâ ſucceſſivè unciâ atque unciâ; </
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nondum æquilibrium dare, decem autem excedere; </
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tu unius juxta brachium quæro æquilibrium, detur hoc ubi pondus ad 47 di-
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viſionem pervenit, actio quæſita valebit 947.</
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<
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hos applico eidem brachio libræ ; </
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go 873, ſummam quæſitam.
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<
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& </
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& </
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<
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<
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actionem ſuperat , & </
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dus 15. </
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detego 1005.</
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applico libræ , & </
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<
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librium, quod datur ubi pondus ad 67 diviſionem, quotientem deſignantem,
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pervenit.</
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<
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te uti.</
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