Gravesande, Willem Jacob 's
,
Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1
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[Figure 81]
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[Figure 82]
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[Figure 97]
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[Figure 98]
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PHYSICES ELEMENTA
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<
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xml:space
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inclinatis impoſita, devolvantur, & </
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tur.</
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9.</
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<
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inclinato ſuſtinetur, id eſt, linea verticalis quæ tranſit per
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fig. 4.</
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centrum illud c, ſecat planum inclinatum intra corpus. </
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pus vero B devolvitur, quia verticalis linea, quæ tranſit per
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centrum gravitatis, ſecat planum inclinatum extra corpus.</
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<
s
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">Ex prædictis etiam ſequitur, corpus deſcendere quando
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gravitatis centrum deſcendit, id eſt, Terræ centrum ver-
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ſus movetur.</
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<
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xml:space
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">Aliquando in illo caſu corpus adſcendere videtur, & </
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etiam revera, ſi integram ipſius maſſam conſideremus, aſcen-
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dit, quando centrum figuræ corporis cum centro gravitatis
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non coincidit.</
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10.</
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<
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ſes rotæ applicantur, ſi ponatur inter duo plana, quorum
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fig. 5.</
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latera DG, FH, continuata formant angulum FCD, baſin
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apice magis elevatam habentem, ab inferiori parte HG, verſus
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planorum partem maxime elevatam FD, movebitur.</
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<
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">Propter majorem inter plana diſtantiam in FD, rota A,
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cujus axis ab utraque parte eſt conus, magis deſcendit inter
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plana, quando illam partem verſus movetur, & </
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te ſua huc fertur, ſi modo deſcenſus inter plana ſuperet ad-
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ſcenſum ex anguli FCD inclinatione ad horizontem.</
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11.</
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<
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plumbeum; </
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fig. 6.</
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ctione ad baſin parallela, cylindrum in duas partes æquales
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dividente, & </
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trum gravitatis memoratum ſit in infimo ad quem perveni-
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re poteſt loco.</
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