Gravesande, Willem Jacob 's
,
Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1
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MATHEMATICA. LIB. I. CAP. VIII.
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coreaceis cerâ & </
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">oleo imbutis impletur, quæ comprimuntur
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operculo q(Q) ita, ut quam exactiſſime cum filo æneo, quod
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hæc pertranſit, congruant.</
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<
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o, cum adjunctis, vitro ſuperiori imponatur, fruſtum au-
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ri cum plumulâ ita diſponenda ſunt, ut hæreant inter ex-
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trema laminæ i, ibique elaſticitate firmiter retineantur.</
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<
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<
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<
s
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xml:space
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">Impoſito tunc operculo, cerâ aëris ingreſſus inter hoc & </
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<
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vitrum, ut ſuperius dictum, cohibeatur; </
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">agitatâ antliâ ex-
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hauriatur aër ex vitris.</
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<
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<
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">Si nunc manubrium m circumvolvatur; </
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<
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">clarum eſt eodem
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momento aurum & </
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">plumulam relaxari, & </
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me etiam eodem momento ad laminam L pervenient.</
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</
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<
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<
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">Corpora cadentia percipiet ſpectator ad talem diſtan-
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tiam poſitus, ut unico intuitu omnia percipiat vitra, ſi ad
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minorem detur diſtantiam oculos dirigat ad ipſam lami-
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nam L.</
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<
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<
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xml:space
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">Ex alio etiam Experimento, in ſequentibus memorando,
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idem hocce Phænomenon deducitur.</
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<
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">Ex hiſce ſequitur, gravitate obſtacula quæcunque per æqua-
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lia ſpatia æqualibus temporibus transferri, ex actione imme-
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diata gravitatis; </
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<
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dem modo moveri, & </
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utrumque eodem modo accelerari; </
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vitatis in corpora ut ipſa corpora , id eſt pondera ſunt
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quantitates materiæ; </
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les æqualiter ponderant, cujuſcunque corporis particulæ
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fuerint.</
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<
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tentiæ proportionalis eſt quantitati materiæ in corpore pon-
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deranti, & </
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<
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perimentis circa preſſiones inſtituendis utimur.</
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