Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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poſſe vt argines prædicti aquei cuiuſcumque altitu
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dinis perſiſtant, ſi enim quartam partem latitudinis
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digiti auricularis ſuperauerint, ſubitò deorsùm præ
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cipitantur. </
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<
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">Ratio quæ aſſignari ſolet, huius effectus,
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aut eſt compreſſio aeris multoties à nobis reiecta, aut
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quia veluti in aceruo granorum tritici, vel arenæ
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tingit</
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efficitur montuoſitas quædam decliuis, quią
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nimirùm ſupremæ partes fulciuntur ab inferioribus,
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vt arginem inclinatum efforment, qui non poteſt e
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leuari vltra angulum ſemirectum, aliàs ſubitò grana
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ipſa deciderent deorsùm; concipiunt ergo minimą
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aquam componentia eſſe minutiſſima quædam gra
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nula, & proindè ad inſtar arenæ efformare poſſe ar
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ginem prædictum. </
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<
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id
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">Sed hoc non videtur ſufficiens
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duplici de cauſa, primò quia argines aquei non ele
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uantur ad quamlibet altitudinem, vt contingit in a
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ceruo granorum tritici, licèt enim angulus inclina
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tionis arginis aquei, ſcilicèt complementum anguli
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AGF, minor ſit ſemiſſe vnius anguli recti, non poteſt
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altitudo prædicti arginis eleuari vltra altitudinem̨
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quadrantis latitudinis digiti auricularis, cùm oppo
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ſitum obſeruetur in aceruo granorum tritici. </
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<
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rea argines aquei BAG, & FI ſunt curui, & gibbi, &
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in infima eius parte G angulus inclinationis maior eſ
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ſe ſolet ſemirecto, igitur requiritur aliqua alia cauſa
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præter fulcimentum particularum minimarum, quod
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in arena, & in aceruo granorum tritici
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cõtingit
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. </
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">Hoc
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egregiè ex noſtra hypotheſi ſaluatur, dum enim la
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mina FG deſcendit infra ſupremam aquæ
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IB, </
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