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

Table of figures

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        <body>
          <chap>
            <p type="main">
              <s id="s.000482">
                <pb pagenum="98" xlink:href="010/01/106.jpg"/>
                <arrow.to.target n="marg115"/>
                <lb/>
              dit in aqua; aut hydrargyro motu ſpontaneo, nempè
                <lb/>
              ab intrinſeca virtute motiua, quæ vocatur leuitas,
                <lb/>
              igitur neceſsè eſt vt in
                <expan abbr="aſcẽſu">aſcenſu</expan>
              penetret corpora flui­
                <lb/>
              da intermedia; atque eorum tenacitatem, & denſi­
                <lb/>
              tatem ſuperet, imò fluidum è ſuo loco expellat, vt
                <lb/>
              via, & tranſitus paretur, qua ſursùm aſcendere, &
                <lb/>
              perduci poſſit, & quia hydrargyrum magis conſti­
                <lb/>
              patum, denſum, & graue eſt,
                <expan abbr="quã">quam</expan>
              aqua, igitur quod­
                <lb/>
              libet corpus leue aere repletum, aut aeris naturam̨
                <lb/>
              participans, vt lignum, & cera, (quæ ex aduerſario­
                <lb/>
              rum ſententia mouentur ab intrinſeca virtute leui­
                <lb/>
              tatis) neceſsè eſt vt maiorem reſiſtentiam
                <expan abbr="offendãt">offendant</expan>
                <lb/>
              in tranſitu per hydragyrum, à cuius tenacitate, den­
                <lb/>
              ſitate, & pondere gradus impetus eius neceſſariò re­
                <lb/>
              tunditur retardaturque multò magis, quàm in
                <expan abbr="aſcẽ-ſu">aſcen­
                  <lb/>
                ſu</expan>
              per aquam contingit, quæ cùm magis rara, & ce­
                <lb/>
              dens ſit, minùs debilitat retardatque eamdem eius
                <lb/>
              vim motiuam, quaproptèr motus aſcenſus ligni, vel
                <lb/>
              ceræ per hydrargyrum multò magis retardabitur,
                <lb/>
              quàm ille, qui per aquam fit; quia verò hoc eſt fal­
                <lb/>
              ſum, & contra ſenſus euidentiam, multò enim velo­
                <lb/>
              ciòr eſt motus ligni, vel ceræ factus per
                <expan abbr="hydrargyrũ">hydrargyrum</expan>
              ,
                <lb/>
                <expan abbr="quã">quam</expan>
              per
                <expan abbr="aquã">aquam</expan>
              ;
                <expan abbr="">non</expan>
              igitur
                <expan abbr="verũ">verum</expan>
              eſt ab intrinſeco, & natu­
                <lb/>
              rali principio ſursùm moueri, & proindè cauſa aſcen­
                <lb/>
              ſus non erit leuitas poſitiua, ideoque nullum vſum̨
                <lb/>
              habebit in natura, nec propterea exiſtet vlla leuitas. </s>
            </p>
          </chap>
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