Heron Alexandrinus, Spiritali di Herone Alessandrino

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    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb/>
              plice iſtrumento molto a propoſito per iſpargere
                <lb/>
              l'acqua.
                <lb/>
              </s>
            </p>
            <p type="main">
              <s>
                <emph type="italics"/>
              Si fabrica dunque vna palla buzza di rame, come a dire AB, forata
                <lb/>
              dalla parte di ſotto con minuti, & ſpeſſi buchi a guiſa di criuello, e che hab_
                <lb/>
              bi dall'altra di ſopra vna canna CD forata, & a lei co'l piombo molto be-
                <lb/>
              ne congiunta, la bocca della quale ſia poi aperta.</s>
              <s> Quando vno dun-
                <lb/>
              que vorrà ſpargere l'acqua, prenda la palla nella parte CD, e la ſomer-
                <lb/>
              ghi nell'acqua di maniera, che nulla parte di lei ſi veda, e così l'acqua ſe
                <lb/>
              n'entra per i fori, e l'aria che è dentro venendone diſcacciata, eſce fuori
                <lb/>
              per la canna CD.</s>
              <s> Hora s'alcuno co'l dito groſſo turando alla canna la
                <lb/>
              bocca C, cauarà la palla fuori dell'acqua, l'acqua, che è nella palla, non
                <lb/>
              è per iſpargerſi altrimente; percioche l'aria entrare non puote nel luogo,
                <lb/>
              che reſtarebbe vacuo, poiche il paſſo è per la bocca C, quale già è chiuſo
                <lb/>
              dal dito; quando voremo dunque che l'acqua ſi ſparga, leuaremo il di-
                <lb/>
              to, e l'aria toſto intrando dentro empirà il luogo rimaſto voto.</s>
              <s> E ſe di
                <lb/>
              nuouo chiuderemo co'l dito lo ſpiraglio E ſi fermarà il corſo dell'acqua fin
                <lb/>
              tanto, che leuando il dito, laſciaremo lo ſpiraglio libero.</s>
              <s> Si può anco
                <lb/>
              tuffare nell'acqua calda, e quella dopo ritenere, e mandar fuori, quanto
                <lb/>
              ci piace, fin tanto che tutta l'acqua contenuta nella palla ſi verſi a fatto.
                <lb/>
              </s>
            </p>
            <p type="main">
              <s>E ſe l'eſtremità della canna CD ſi farà piegata alquanto, cioè nella par-
                <lb/>
              te C operarà l'iſteſſo effetto; anzi di più ſarà meglio accommodata per
                <lb/>
              queſto tale vſo, poſciache tanto più facilmente la bocca ſi coprirà co'l dito.</s>
              <s>
                <emph.end type="italics"/>
                <lb/>
              </s>
            </p>
            <p type="head">
              <s>Delle medeſima palla.</s>
              <s> VII.
                <lb/>
              </s>
            </p>
            <p type="main">
              <s>Si può medeſimamente dall'iſteſſa palla man-
                <lb/>
              dar fuori l'acqua calda, e fredda ad ogni noſtro
                <lb/>
              piacere.
                <lb/>
              </s>
            </p>
            <p type="main">
              <s>
                <emph type="italics"/>
              Si fabrica ſimilmente la palla AB, c'habbi per il lungo vn tramezzo
                <lb/>
              diritto CD, e nella parte di ſopra vi ſia la canna EF forata inſieme con
                <lb/>
              la palla, & a quella con diligenza congiunta, dentro la qual canna ſia il
                <lb/>
              tramezzetto CG vnito, e continuato con l'altro tramezzo CD, & hab-
                <lb/>
              bi poi di ſopra le faſce HK, quali ſeruano a tutte due le parti de' luoghi,
                <emph.end type="italics"/>
                <lb/>
              </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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