Heron Alexandrinus, Spiritali di Herone Alessandrino

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    <archimedes>
      <text>
        <body>
          <chap>
            <pb/>
            <p type="head">
              <s>Del Diabete ſpiritale di mezzo.</s>
              <s> II.
                <lb/>
              </s>
            </p>
            <p type="main">
              <s>
                <emph type="sup"/>
              1
                <emph.end type="sup"/>
              Euui ancora vn iſtrumento che ſi chiama Dia-
                <lb/>
              bete ſpiritale di mezzo, che fà l'iſteſſa operatione
                <lb/>
              del ſifone torto.
                <lb/>
              </s>
            </p>
            <p type="main">
              <s>Sia medeſimamente vn vaſo pieno di acqua AB, e per il ſuo fondo
                <lb/>
              trapaſſi il canaletto CD congiunto a eſſo fondo, e che trapaſſando auanzi
                <lb/>
              di ſotto, ma la ſua bocca C non tocchi la bocca del vaſo AB, ma vn'al-
                <lb/>
              tro canale EF lo circondi, e ſia da lui egualmente diſtante in ogni parte,
                <lb/>
              la cui bocca di ſopra ſia coperta con la lama EG laſciando poco ſpatio
                <lb/>
              tra lei, a la bocca C, ma la boc-
                <lb/>
              ca
                <emph.end type="italics"/>
                <figure number="5"/>
                <emph type="italics"/>
              di ſotto del canale EF ſia tãto
                <lb/>
              diſtante dal fondo del vaſo AB
                <lb/>
              quanto baſti per dare il paſſo a
                <lb/>
              l'acqua.</s>
              <s> Accommodato queſto
                <lb/>
              in tal maniera, ſe tiraremo per
                <lb/>
              la bocca D l'aria che è nel cana-
                <lb/>
              le CD, tiraremo anco inſieme
                <lb/>
              l'acqua che è nel vaſo AB di
                <lb/>
              modo che ſcapparà fuora, e per
                <lb/>
              riſpetto del canale, che ſporge in
                <lb/>
              fuori ſi riuerſerà tutta l'acqua,
                <lb/>
              che è nel vaſo AB, per-
                <lb/>
              che l'aria, che è interpoſta fra
                <lb/>
              l'acqua, & il canale EF per eſ-
                <lb/>
              ſere poca, può ritirarſi dietro
                <lb/>
              l'acqua, il corſo della quale non
                <lb/>
              ſi fermarà per cagione dello ſpor_
                <lb/>
              gere in fuora, che ſe non vi fuſſe
                <lb/>
              EF mancaria di correre, poiche
                <lb/>
              la ſuperficie dell'acqua ſecondo
                <lb/>
              C ſi fà, peroche ſporge come ſi è
                <emph.end type="italics"/>
                <lb/>
              </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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