Heron Alexandrinus, Spiritali di Herone Alessandrino

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          <chap>
            <p type="main">
              <s>
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            </p>
            <p type="main">
              <s>
                <emph type="italics"/>
              Sia detto vaſo AB, che habbia il collo dipartito dal tramezzo CD,
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              e per CD tiriſi la cannelletta EF forata inſieme con eſſo, d'intorno
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              alla quale ponghiſi la canna KL, di modo che ſia vn diabete, che non
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              reſpiri, e con eſſa canna KL ſia forata inſieme vn'altra canna MN, che
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              habbi la bocca M aperta, e la ſua gamba di fuori, entri in vn vaſo da be-
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              re OX, nel quale mettiamo l'acqua in tanta quantità, che ſi empia, on-
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              de veraſſi anco a empire quella parte della gamba della cannella, che vi è
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              poſta dentro; infondaſi dopoi nel collo del vaſo AB vn pochetto di ac-
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              qua, tanto che chiuda il loco da reſpirare.</s>
              <s> Perbenche dunque ſia pieno
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              il vaſo AB non correrà perciò la cannella P auenga che ſia aperta; im-
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              peroche l'aria non ha l'intrata, per riſpetto dell'acqua infuſa nel collo;
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              ma leuato via il vaſo da bere, è forza necceſſariamente che ſi voti qual-
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              che parte di quella gamba della canna, che è nel vaſo da bere; ondo
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              nel luogo rimaſto voto, verà tirata l'aria contigua, & ella ſimilmente
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              tirarà l'acqua verſata nel collo; a tale che venghi a ſopraſtare alla bocca
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              F, e per queſto hauendo poi l'aria il paſſo, correrà la cannella P, fin
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              tanto che alzato sù il vaſo da bere, operi che l'acqua chiuda quel luogo
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              da reſpirare, che era nel collo; perche in quel caſo tornerà a occupare
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              l'iſteſſo luogo, e la cannella P più non correrà: e queſto hauerà tante vol-
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              te effetto, quante ſarà leuato, e poſto il vaſo da bere.</s>
              <s> Ma biſogna be-
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              ne di auertire che il vaſo da bere non ſi leui a fatto, acciò non venghi di-
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              ſcoperta tutta la gamba della canna; e per queſto la cannella MN ridu-
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              chiſi in forma di thyrſo, & habbia d'intorno RN, accioche lo ſpettaco-
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              lo ſia deutamente ordinato.
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              </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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