Gravesande, Willem Jacob 's
,
Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1
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MATHEMATICA. LIB. II. CAP. XI.
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concipimus, ſi ad hoc attendamus, particulas quæ in cor-
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">TAB. XXXVI.
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fg. 5.</
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pus, ut A agunt, ad latera defluere in B & </
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">D, ibique,
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ſepoſitâ cohæſione, nullam exerere actionem, poſitâ autem
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cohæſione hac, particulæ hæ laterales ſecum trahunt, & </
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actione ſua inſequentes ſeparant, quæ deſideratur ſeparatio
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ut fluidum ab omni parte defluat: </
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<
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">cohæſio autem ſuperari
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minime poterit niſi corpus reſiſtat, & </
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">247.</
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quæ actioni ex inertia oriundæ ſuperaddenda eſt.</
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">Qua Experimenta de Fluidorum Reſiſtentiis inſtituuntur.</
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<
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">Arca lignea AB longitudinem habet quinque pedum,
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latitudinem duorum pedum cum ſemiſſe, altitudinem o-
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fig. 1.</
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cto aut decem pollicum.</
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<
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">Quatuor hæc ſuſtinetur columnis ligneis, altitudinis quin-
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que pedum, qui minori arcæ CD imponuntur, quæ ipſa
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pedibus gaudet quatuor, altitudinis circiter decem pollicum;
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</
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<
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">non autem minorem hiſce pedibus tribuimus altitudinem,
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ut ex epiſtomio Eaqua in ſitulam, fere hujus altitudinis, re-
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cipiatur.</
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<
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">Parallelopipedum cavum ligneum F longitudinem ha-
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bet trium pedum cum ſemiſſe à g ad b; </
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ſis eſt quadratum quinque pollicum. </
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">In figura repræſenta-
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tur quomodo verticaliter regulis ligneis firmetur Parallelo-
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pipedum. </
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arcæ AB fundum eſt quindecim pollicum.</
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<
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">In hoc ipſo fundo, in medio reſpectu longitudinis, fora-
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men datur rotundum, diametri circiter quatuor pollicum
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cum ſemiſſe, quod paulo minus diſtat ab uno latere quàm
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ab alio, ut magis commode experimenta inſtituantur.</
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<
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">Huic foramini reſpondet foramen, quod parum cum
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præcedenti differt, ſed tamen minus eſt, in medio ligni ſu-
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perioris parallelopipedi F.</
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<
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">In hiſce foraminibus tubus plumbeus T verticaliter fir-
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matur, quo communicatio datur inter arcam AB & </
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rallelopipedum F. </
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