Vitruvius Pollio, I dieci libri dell?architettura, 1567

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    <archimedes>
      <text>
        <body>
          <chap>
            <subchap1>
              <subchap2>
                <p type="main">
                  <s id="s.001665">
                    <pb pagenum="80" xlink:href="045/01/088.jpg"/>
                    <emph type="italics"/>
                  te le coſe boglienti ſi raffreddano. </s>
                  <s id="s.001666">Pare adunque che quella zolla eſpiri mentre appare il ſue­
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                  co, che ſi parte. </s>
                  <s id="s.001667">& finalmente reſta come morta, in modo che gettat aui di nuouo l'acqua, ella
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                  piu non arde, & quella calce, che prima era chiamata uiua, poi che è eſtinta, morta ſi
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                  chiama: & dí piu ſi ha, che la calce non boglie ſe ui ſarà infuſo l'oglio. </s>
                  <s id="s.001668">Dico io che il calore
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                  che acquiſta la calce nella fornace, rinchiuſo in eſſa ſi reſtrigne, fuggendo dal freddo dell'ac­
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                  qua, come da ſuo nimico, & per tale unione ſi rinforza, & diuenta ſuoco: & però l'acqua
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                  aceende la calce, che coſi non accende la cenere, perche nella cenere ſi conſuma il calore: pe­
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                  rò la calce tratta di fornace purgata dal fuoco, è liggiera, & ſonora, è lodata: & maſsi­
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                  mamente ſe bagnata con grande ſtrepito euapora: ma con queſta ſi meſchia piu arena, che con
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                  quella, che tratta dalla fornace hauerà le ſcaglie in polue riſolte. </s>
                  <s id="s.001669">La calce ſi fa piu tenera
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                  criuellandoſi la ſabbia, piu ſpeſſa con la ſabbia angulare, piu tenace con la terza parte di teſto­
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                  le piſte, & bene incorporate, & ben battute.
                    <emph.end type="italics"/>
                  </s>
                </p>
              </subchap2>
              <subchap2>
                <p type="head">
                  <s id="s.001670">
                    <emph type="italics"/>
                  Della polue pozzolana. </s>
                  <s id="s.001671">Cap. VI.
                    <emph.end type="italics"/>
                  </s>
                </p>
                <p type="main">
                  <s id="s.001672">Evui anche una ſpecie di polue, che di natura fa coſe merauiglioſe. </s>
                  <s id="s.001673">Naſce a
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                  Baie, & ne i campi di coloro, che ſono appreſſo il monte Veſuuio. </s>
                  <s id="s.001674">Que­
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                  ſta temperata con la calce, & con cementi, non ſolo dà fermezza a gli altri edi­
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                  ficij, ma le grandi opere, che ſi fanno nel Mare per lei ſott'acqua ſi fanno
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                  piu forti. </s>
                  <s id="s.001675">La ragione di queſto è, perche ſotto que monti, & ſotterra ſono ardentiſsime,
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                  & ſpeſſe fonti, lequali non ſarebbeno, ſe nel fondo loro non haueſſero zolfo, ouero allume,
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                  ouero bitume, che fanno grandiſsimi fuochi. </s>
                  <s id="s.001676">Penetrando adunque il fuoco, & il uapo­
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                  re della fiamma nel mezo delle uene, & ardendo rende quella terra lieue, & il tofo, che
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                  naſce in que luoghi aſſorbe, & è ſenza liquore. </s>
                  <s id="s.001677">Eſſendo adunque tre coſe di ſimigliante
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                  natura dalla uehemenza del fuoco formate in una miſtura concorrenti, ſubito che han­
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                  no riceuuto il liquore, ſi raunano, & preſo l'humore indurite ſi raunano, & raſſodano
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                  di modo, che nè'l mare, nè la forza dell'acqua le puo diſciogliere: Ma che in que luoghi
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                  ſiano ardori, egli ſi dimoſtra per queſto; che ne i monti Cumani, & Baiani, ſi cauano i
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                  luoghi per li bagni, ne i quali naſcendo il feruente uapore dal fondo con la forza del fuo=
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                  co penetra per quella terra, & trapaſſandola in que luoghi riſorge, & d'indi per li ſudato­
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                  ri ſi cauano grandi utilità. </s>
                  <s id="s.001678">Similmente ſi narra anticamente eſſere creſciuti gli ardori, &
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                  eſſer abondati ſotto il Monte Veſuuio, & d'indi hauere per li campi ſparſa la fiamma d'in­
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                  torno: & però quella pietra, che ſpugna, ouero pomice Pompeiana ſi chiama, cotta per­
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                  fettamente, da un'altra ſpecie di pietra in queſta qualità pare, che ſia ridotta. </s>
                  <s id="s.001679">& quella
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                  ſorte di ſpugna, che iui ſi caua, non naſce in ogni luogo, ſe non d'intorno il monte Etna,
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                  & i colli della Miſia, detti da i Greci, Catachiecaumeni, & altroue ſe iui ſono queſte pro­
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                  prietà di luoghi. </s>
                  <s id="s.001680">ſe adunque in quelle parti ſi trouano le fonti d'acque feruenti; & da gli
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                  antichi ſi narra, che nelle concauità de i monti ſi trouano caldi uapori, & le fiamme ſono
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                  ite per molti luoghi uagando, pare ueramente eſſere certa coſa, che per la uehemenza del
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                  fuoco dal tofo, & dalla terra, come nelle fornaci dalla calce, coſi da queſti ſaſsi eſſer trat­
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                  to il liquore. </s>
                  <s id="s.001681">& però da coſe diſpari, & diſsimili inſieme raunate, & in una uirtù riſtrette,
                    <lb/>
                  & il caldo digiuno d'humore dall'acqua ſubito ſatiato raccommunando i corpi, bolle per
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                  lo calore naſcoſo, & fa, che quelli fortemente s'uniſchino, & preſto riceuino la forza del­
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                  la ſodezza. </s>
                  <s id="s.001682">Ci reſta il diſiderio di ſapere, perche eſſendo in Etruria molte fonti d'acque
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                  boglienti, non ui ſia anche la polue, che naſce ne i detti luoghi, laquale per la iſteſſa ra­
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                  gione faccia ſode l'opere di ſott'acqua. </s>
                  <s id="s.001683">& però prima che cio ſia richieſto, mi pare, per­
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                  che coſi ſia, renderne conto. </s>
                  <s id="s.001684">In tutte le parti, & in tutti i luoghi non ſi truoua la iſteſſa </s>
                </p>
              </subchap2>
            </subchap1>
          </chap>
        </body>
      </text>
    </archimedes>
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