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

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            <p type="main">
              <s id="s.001649">
                <pb pagenum="214" xlink:href="028/01/254.jpg"/>
              modò inchoare motum, ſed & ipſum quoque accele­
                <lb/>
              rare æquabiliter: vt putà per gradus ab vſque initio
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              tum manenteis, tum acquiſitos, eo modo, quo decla­
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              ratum eſt. </s>
              <s id="s.001650">Abieci verò impellentem attributam aëri,
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              vt quæ non modò inefficax inchoando motui videre­
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              tur, ſed illius etiam promotioni, ſeu accelerationi offi­
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              ciens; tantum abeſt, vt ad ipſam procurandam quic­
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              quam conferret. </s>
              <s id="s.001651">Atque hæc quidem cauſſa eſt, quam­
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              obrem quidpiam videatur ſimùl de tua opinione di­
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              cendum, quatenus partim conſentit cum ea, quæ mihi
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              priùs animo inſedit, partim diſſentit ab ea, quæ iam in­
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              ſidet. </s>
              <s id="s.001652">Quippe, vt ego quidem priùs, ſic tu agnoſcis du­
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              plicem cauſſam; & vnam quidem penitùs candem,
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              aërem putà impellentem; alteram verò nomine diuer­
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              ſam, ſed effectu eandem, inſitam putà grauitatem (cui
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              ego attractricem Terræ
                <expan abbr="ſubſtituendã">ſubſtituendam</expan>
              cenſueram) qua­
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              tenus tu eam retinens, ipſi quoque tribuis incœptio­
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              nem motus. </s>
              <s id="s.001653">Cùm verò ipſe ſolam iam attractricem
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              retineam, à qua continenter agente, & impreſſione non
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              pereunte, acceleratio motus fiat; opinatis tu grauita­
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              tem ad accelerationem nihil facere: ſed inalteratam ſic
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              perſeuerare, vt ex ſe motum vniformem, & æquabilem
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              faciat: ſolum autem aërem ſeſe à tergo concludentem
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              eſſe accelerationis cauſſam. </s>
              <s id="s.001654">Heinc nempe ſuperiùs tua
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              hæc verba fuerunt.
                <emph type="italics"/>
              Acceleratio omnis à medio ſolo eſt: vn­
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              de deſcenſus in vacuo ſui ſemper ſimilis, atque vniformis
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              exſiſteret: ſicut tunc quoque tota cauſſa deſcenſus, nempe graui­
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              tas, ſemper eadem, ac ſui ſimilis per ſeueraret.
                <emph.end type="italics"/>
              </s>
              <s id="s.001655"> Itaque cùm
                <lb/>
              diſſenſus ſit circa tuam vtramque cauſſam, ecce de
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              vtraque pauca hæc attingo. </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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