Borelli, Giovanni Alfonso, De motionibus naturalibus a gravitate pendentibus, 1670

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              <s id="s.000460">
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              tate, & multiplicitate cauſarum quando ſuos effe­
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              ctus producere poteſt via illa breuiori, & faciliori.
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              </s>
              <s id="s.000461">hinc deducitur, quod ſi poſſibile eſt
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              cor­
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              pora naturalia ad propria loca mediante vnica, & ſin­
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              gulari motiua virtute grauitatis, vaniſſimè, & ſtultè
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              natura ageret, ſi niteretur prædictum finem aſſe qui
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              adhibitis duobus principijs ſcilicèt grauitate, & al­
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              tera oppoſita virtute, quæ leuitas nuncupatur. </s>
              <s id="s.000462">Quod
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              verò poſſint naturalia corpora ad ſua naturalia loca
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              perduci à grauitate ſola abſque leuitate patet ex ſu­
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              periùs dictis, nam minor grauitas, quæ veſicæ aerę
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              plenæ tribuitur, & maior aquæ, & omnium maxima
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              hydrargyro, ſufficientiſſima cauſa eſt apta ad produ­
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              cendum
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              effectum, quod deducitur ex prin­
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              cipijs, & rationibus mechanicis. </s>
              <s id="s.000463">Quaproptèr pro­
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              babiliſſimè concedendum eſt ſolo principio grauita­
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              tis abſque vlla leuitate naturam ſuum finem aſſequi
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              collocandi corpora terrena in debitis locis, nempè
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              ſursùm, & deorsùm. </s>
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            <p type="margin">
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              Cap. 4. poſi­
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              tiuam leui­
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              tatem noņ
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              dari.</s>
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              Cap. 2.</s>
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              <s id="s.000466">Et hactenùs adductæ ſunt rationes probabiles
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                tra</expan>
              poſitiuam leuitatem, reſtat modò vt idipſum di­
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              rectè oſtendatur rationibus magis conuincentibus,
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              & efficacioribus. </s>
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          </chap>
        </body>
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