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

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      <text>
        <body>
          <chap>
            <p type="main">
              <s id="s.000625">
                <pb pagenum="125" xlink:href="010/01/133.jpg"/>
              culum inane remaneat, &
                <expan abbr="tũc">tunc</expan>
              ignis camini nullo pa­
                <lb/>
                <arrow.to.target n="marg155"/>
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              cto accendi poteſt, nec in flammam verti, aut per­
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              durare, niſi oſtiolum, vel foramen aliquod in ipſo ca­
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              mino aperiatur, & tunc facilè flamma accenditur, &
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              perſeuerat. </s>
              <s id="s.000626">Ratio huius effectus pendet nedùm ab
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              impulſu flammæ ſursùm, ſed etiam à rarefactione ae­
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              ris propè ignem exiſtentis, eumque
                <expan abbr="ambiẽtis">ambientis</expan>
              per to­
                <lb/>
              tam camini longitudinem, quia nempe aer prædictus
                <lb/>
              ab igne calefactus minùs grauis ſpecie redditur,
                <expan abbr="quã">quam</expan>
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              aer cubiculi, & externus, qui à camino diſtat; Hoc
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              autem neceſſariò aduenit ex legibus mechanicis, &
                <lb/>
              ex Archimedis
                <expan abbr="demõſtrationibus">demonſtrationibus</expan>
              ; neceſsè enim eſt,
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              vt aer rarior, & minùs grauitans ſursùm expellatur
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              exprimaturque à grauiore aere
                <expan abbr="circumambiẽte">circumambiente</expan>
              , hinc
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              fit vt poſt aſcenſum illius aeris rarefacti per
                <expan abbr="caminũ">caminum</expan>
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              diminuatur moles aeris ipſius cubiculi propè, & cir­
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              ca caminum. </s>
              <s id="s.000627">Non ergo mirum eſt, nouum aerem pro­
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              fluere ad replendum cubiculi
                <expan abbr="ſpatiũ">ſpatium</expan>
              , & hæc eſt cau­
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              ſa, quare percipitur ventus ille, & effluuium per­
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              petuum dum flamma camini viget. </s>
            </p>
            <p type="margin">
              <s id="s.000628">
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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>
            </p>
            <p type="main">
              <s id="s.000629">Prædictum ratiocinium confirmari poteſt à pul­
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              cherrimo experimento à D. </s>
              <s id="s.000630">Candido Buono Floren­
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              tiæ mihi communicato. </s>
            </p>
            <p type="main">
              <s id="s.000631">
                <emph type="center"/>
              PROP. LXI.
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              </s>
            </p>
            <p type="main">
              <s id="s.000632">
                <emph type="center"/>
                <emph type="italics"/>
              Trutinæ æquilibratæ vna lanx excalefacta
                <expan abbr="ſursũ">ſursum</expan>
              eleuatur
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              extruſa à pondere aeris, reliquam lancem ambientis.
                <emph.end type="italics"/>
                <emph.end type="center"/>
              </s>
            </p>
            <p type="main">
              <s id="s.000633">ERat enim trutina, ſeù bilanx tantæ perfectionis,
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              vt à quinquageſima parte vnius grani hordei, </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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