Heron Alexandrinus, Spiritali di Herone Alessandrino

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    <archimedes>
      <text>
        <body>
          <chap>
            <pb/>
            <p type="head">
              <s>Del concento de gli vccelli.</s>
              <s> XLIII.
                <lb/>
              </s>
            </p>
            <p type="main">
              <s>Le voci de gli vccelli con certi interualli ſi fan-
                <lb/>
              no in queſto modo.
                <lb/>
                <figure number="55"/>
                <lb/>
              </s>
            </p>
            <p type="main">
              <s>
                <emph type="italics"/>
              Sia vn vaſo ben chiuſo, per il quale ſi trametta vn'infondibolo, la cui cã-
                <lb/>
              nella ſi diſcoſti tanto dal fondo, quanto baſti a l'acqua per paſſare, ſi po-
                <lb/>
              ne poi di ſopra l'infondibolo vn vaſo concauo, che ſi ſuolga per mezzo
                <lb/>
              delli ſuoi cnodaci, & habbia qualche peſo nel fondo, nel quale corra ſem-
                <lb/>
              pre l'acqua; ſegue dunque che eſſendo voto il vaſo, che ſi ſoſtiene nelle
                <lb/>
              punte delli cnodaci, ſi viene a mantenere diritto mediante il peſo, che ha
                <lb/>
              cõgiunto al fondo; ma quãdo ſarà empito di acqua ſi riuerſerà nell'infon-
                <lb/>
              dibolo, & indi nel vaſo chiuſo, e l'aria, che è dentro in queſto diſcac-
                <lb/>
              ciata per vna ſampogna, farà il concento; votaſi dopo il vaſo chiuſo con
                <lb/>
              qualche canna torta, e mentre che egli ſi vota, l'altro vaſo di nuouo ri-
                <lb/>
              empito ſi riuerſa.</s>
              <s> Al che fare, fia di miſtieri che la correntia dell'acqua
                <lb/>
              non caggia a punto nel mezzo del vaſo, accioche riempito ſubito poi ſi
                <lb/>
              riuerſi.</s>
              <s>
                <emph.end type="italics"/>
                <lb/>
              </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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