Heron Alexandrinus, Spiritali di Herone Alessandrino

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    <archimedes>
      <text>
        <body>
          <chap>
            <pb/>
            <p type="head">
              <s>Della Palla vota.</s>
              <s> IX.
                <lb/>
              </s>
            </p>
            <p type="main">
              <s>Si fabrica medeſimamente vna palla cauata den-
                <lb/>
              tro, o anco altro vaſo, nel quale meſſaui l'acqua,
                <lb/>
              ella de ſe ſteſſa, e con gran violenza ſi leua in alto;
                <lb/>
              talche ſi verſa tutta, benche l'andar ſuo in ſù ſia
                <lb/>
              contra la natura di lei; hor queſto è il modo di fa-
                <lb/>
              bricarla.
                <lb/>
              </s>
            </p>
            <p type="main">
              <s>
                <emph type="italics"/>
              Sia vna palla capace di
                <emph.end type="italics"/>
                <figure number="16"/>
                <lb/>
                <emph type="italics"/>
              ſei
                <emph type="sup"/>
              1
                <emph.end type="sup"/>
              Cotile in circa, il giro
                <lb/>
              della quale ſia di vna lami-
                <lb/>
              na fidata, acciò poſſi reſtar
                <lb/>
              ſalda, nel premere dell'a-
                <lb/>
              ria, che ſi deue fare; que-
                <lb/>
              ſta ſia AB poſata ſopra vn
                <lb/>
              qualche
                <emph type="sup"/>
              2
                <emph.end type="sup"/>
              Hypoſpario C, e
                <lb/>
              forata nella parte di ſopra,
                <lb/>
              ſiaui meſſo dentro vna can-
                <lb/>
              na, tanto lunge al luogo, che
                <lb/>
              diametralmente è riſcon-
                <lb/>
              tro al foro di ſopra, quan-
                <lb/>
              to baſti per dare il paſſo a
                <lb/>
              l'acqua; e ſoprauanzi al-
                <lb/>
              quanto nella parte di ſopra
                <lb/>
              della palla, congiunta, e
                <lb/>
              ſaldata al ſuo corpo intor-
                <lb/>
              no al foro.</s>
              <s> Diuidaſi poi la
                <lb/>
              bocca di ſopra in due canne
                <lb/>
              DGDF, alle quali ſieno
                <lb/>
              congiunte, e ſaldate altre
                <lb/>
              due canne arcate, GHKL,
                <lb/>
              FMNX, che habbino li
                <emph.end type="italics"/>
                <lb/>
              </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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