Borelli, Giovanni Alfonso, De motionibus naturalibus a gravitate pendentibus, 1670
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              dri extremitas C termino H trochleæ, vel libræ HK
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              radiorum æqualium, cuius centrum I, & reliquo ex­
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              tremo K ſuſpendatur pondus N æquale grauitati ab­
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              ſolutæ cylindri AC. profectò manifeſtum eſt ſenſui
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              non ſufficere pondus N ad ſeparandum, & diuellen­
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              dum cylindrum AC à pauimento DE, ſed requiritur
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              aliqua vis multò maior illa, quæ reperiri
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              poterit, non enim eſt infinita, igitur ſi addatur con­
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              tinentèr pondus ponderi termino K
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              deuenie­
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              mus ad pondus aliquod, vt eſt O à quo cvlindrus CA
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              directa tractione diuelli à pauimento poterit. </s>
              <s id="s.000937">Quia
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              verò duo pondera N, & O directè diuellunt
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              AC, & hic reſiſtit ſeparationi duabus viribus, pro­
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              prij ſcilicèt ponderis æqualis nempè ipſi N, & vi
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              contactus, & repugnantiæ ad vacuum
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              .
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              </s>
              <s id="s.000938">igitur remanens vis ponderis O æqualis erit, & aucta
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              ſuperabit vim connexionis duarum ſuperficierum ſe
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              mutuò exquiſitè tangentium. </s>
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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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              Sup. 8.</s>
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              <s id="s.000941">Non defuit tamen qui hunc progreſſum in
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              reuocare auſus ſit, & ſic inutilem, ac inefficacem vni­
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              uerſam demonſtrationem ſubſequentem redderę,
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              quę in prædicta experimentali operatione fundatur.
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              </s>
              <s id="s.000942">Nucleus difficultatis talis eſt, non videri poſſibilę
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              columnam AC vnquam poſſe motu tàm directo ſur­
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              sùm trahi, nec libra, nec trochlea itaut non flectatur
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              inclineturque, & hoc (inquiunt) nullo pacto huma­
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              na diligentia aſſe qui poſſe; imò aſſerere auſi ſunt,
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              quòd ſi funis HC directè traheretur perpendiculari­
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              tèr nimirùm ad planum horizontis, & ad baſim DE </s>
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