Gassendi, Pierre, De proportione qua gravia decidentia accelerantur, 1646

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            <p type="main">
              <s id="s.001632">
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              hentem, aut vtramque ſimùl. </s>
              <s id="s.001633">Secundò, viſum mihi
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              eſt aſſumi poſſe aërem, qui infernè preſſus, reſilienſ­
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              que ad latera, in locum poſterum ſuccederet, ſuperné­
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              que inſtaret, pro cauſſa impellente; & magneticam Ter­
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              ræ vim, quæ hamulorum, catenularumque inſtar, in­
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              fernè pelliceret, pro cauſſa trahente. </s>
              <s id="s.001634">Tertiò viſum eſt
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              aërem non poſſe inchoare motum, quatenus ſi nulla
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              eſſet Terra, & ſolus aër in vniuerſo, & ipſe quidem in­
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              finitè fuſus, vnaque lapis intra ipſum, tunc lapis in
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              hanc potiùs partem, quàm in aliam non moueretur:
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              quare & motum lapidis videri debere ab attractione
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              incipere, ac tum poſſe ab aëre ſuccedente adiutari.
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              </s>
              <s id="s.001635">Quartò, cùm fuiſſem ratiocinatus motum ſemel im­
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              preſſum futurum perpetuum, & æquabilem, niſi eſſet
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              cauſſa, quæ illum aut retundendo minueret, aut vrgen­
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              do acceleraret; concluſi motum lapidis accelerari, quòd
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              ſtatim à prima attractione, & quaſi poſt primum
                <expan abbr="ictũ">ictum</expan>
              ,
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              ſuccederent continuò ictus alij, qui impreſſione facta,
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              manenteque facerent motum celeriorem. </s>
              <s id="s.001636">Quintò vi­
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              ſum eſt neque attractionem ſolam, neque impulſio­
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              nem ſolam, neque vllam aliam ſimplicem cauſſam ſuf­
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              ficere ad memoratam progreſſionem: quia cùm hoc
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              modo ictus continenter facti progreſſuri eſſent ſecun­
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              dum vnitatum ſeriem, conſentaneum videbatur, vt &
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              velocitatis gradus acquirerentur, & ſpatia quoque per­
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              currerentur ſecundum eandem ſeriem: ſicque in fine
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              cuiuſque momenti ſpatia aggregata non forent vt
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              quadrata temporum, vnum, quatuor, nouem, ſex de­
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              cim, & quadrata cætera; ſed vt vnum tria, ſex, decem,
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              & conſequentia aggregata. </s>
              <s id="s.001637">Sextò viſum eſt ergo </s>
            </p>
          </chap>
        </body>
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    </archimedes>
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