Fabri, Honoré, Tractatus physicus de motu locali, 1646

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    <archimedes>
      <text>
        <front>
          <section>
            <p id="N104E5" type="main">
              <s id="N104ED">
                <pb xlink:href="026/01/012.jpg"/>
              duobus præſertim conſiſtit; </s>
              <s id="N104F5">primò, eò quòd medium detrahat ali­
                <lb/>
              quid grauitationis corporis grauis; </s>
              <s id="N104FB">ſecundò, eò quòd partes medij
                <lb/>
              aliquam implicationem habeant, quæ ſolui non poteſt ſine aliqua
                <lb/>
              compreſſione, vel tenſione; </s>
              <s id="N10503">vtraque autem reſiſtit impetui: quod
                <lb/>
              ſpectat ad primum, ſi medium ſit æqualis grauitatis cum ipſo cor­
                <lb/>
              pore, detrahitur tota grauitatio, ſi ſubduplæ ſubduplum, &c. </s>
              <s id="N1050B">de quo
                <lb/>
              aliàs. </s>
            </p>
            <p id="N10510" type="main">
              <s id="N10512">8. Hinc corpus graue per medium rarius, cæteris paribus, fa­
                <lb/>
              cilè deſcendit; non tamen ex reſiſtentia medij cognita, poteſt co­
                <lb/>
              gnoſci proportio grauitatis vtriuſque, propter ſecundum caput, ex
                <lb/>
              quo etiam petitur reſiſtentia. </s>
              <s id="N1051C">Idem corpus cum eodem medio
                <lb/>
              comparatum, habet tres coniugationes: nam, vel eſt grauius, vel­
                <lb/>
              eſt grauius, vel æquè graue, vel minùs. </s>
              <s id="N10524">Sunt etiam tres aliæ con­
                <lb/>
              iugationes, ſcilicet, eiuſdem mobilis cum diuerſis mediis, duorum
                <lb/>
              mobilium cum eodem medio, duorum mobilium cum duobus
                <lb/>
              mediis. </s>
            </p>
            <p id="N1052D" type="main">
              <s id="N1052F">9. Figura corporis grauis deorſum cadentis motum vel retardat
                <lb/>
              vel accelerat; </s>
              <s id="N10535">retardat quidem, ſi plures partes medij amouendæ
                <lb/>
              ſunt vel pauciores velociori motu; accelerat è contrario: </s>
              <s id="N1053B">hinc idem
                <lb/>
              corpus
                <expan abbr="parallelipedũ">parallelipedum</expan>
              iuxta tres diuerſos ſitus, triplici motu diuer­
                <lb/>
              ſo deſcendere poteſt: hinc ratio, cur acuminata tam facilè deſcen­
                <lb/>
              dant. </s>
              <s id="N10549">Cubus, qui deſcendit, imprimit aëri velociorem motum,
                <lb/>
              quàm ipſe habeat; & quò maior eſt eius ſuperficies, eò velociorem. </s>
            </p>
            <p id="N1054F" type="main">
              <s id="N10551">10. Duo globi, vel cubi eiuſdem materiæ æquè velociter deſ­
                <lb/>
              cendunt: </s>
              <s id="N10557">ratio eſt, quia, licèt maioris vires habeant maiorem pro­
                <lb/>
              portionem ad molem aëris reſiſtentis, quàm vires minoris ad alte­
                <lb/>
              ram aëris molem, quæ proprium illius motum retardat, cùm tamen
                <lb/>
              aër, qui reſiſtit maiori cubo, debeat amoueri velociori motu, quàm
                <lb/>
              aër, qui reſiſtit minori, ſitque eadem proportio reſiſtentiæ ratione
                <lb/>
              motus, minoris ad maiorem, quæ eſt ratione molis, maioris ad mi­
                <lb/>
              norem; </s>
              <s id="N10567">certè ratio compoſita vtriuſque erit eadem in vtroque cu­
                <lb/>
              bo: igitur æqualiter deſcendet vterque. </s>
            </p>
            <p id="N1056D" type="main">
              <s id="N1056F">11. Si tamen ſint diuerſæ materiæ, haud dubiè, qui conſtat leuio­
                <lb/>
              ri materia, tardiùs deſcendet; quia eius vires habent minorem
                <lb/>
              proportionem ad reſiſtentiam. </s>
              <s id="N10577">Corpuſcula etiam ex grauiſſima ma­
                <lb/>
              teria tardiſſimè deſcendunt: </s>
              <s id="N1057D">tum, quia à filamentis illis, quibus par­
                <lb/>
              tes aëris implicantur, facilè detinentur; </s>
              <s id="N10583">analogiam habes in lapil­
                <lb/>
              lo, qui ab araneæ tela intercipitur: </s>
              <s id="N10589">tum, quia, cùm latiſſimam ali­
                <lb/>
              quando habeant ſuperficiem pro modica mole, minimam habent </s>
            </p>
          </section>
        </front>
      </text>
    </archimedes>
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