Casati, Paolo, De igne dissertationes physicae, 1686

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            <s xml:id="echoid-s2045" xml:space="preserve">
              <pb o="63" file="0075" n="75" rhead="De ignis loco."/>
            ſe omni aëre, qui ſuâ leuitate metalli grauitatem imminuere
              <lb/>
            valeat.</s>
            <s xml:id="echoid-s2046" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2047" xml:space="preserve">Grad. </s>
            <s xml:id="echoid-s2048" xml:space="preserve">Sulphureæ fuligini patentes cupri, aut argenti, mea-
              <lb/>
            tus peruadenti facilè tribui poteſt illa ponderis acceſſio, quin
              <lb/>
            ignem propterea grauem dicamus. </s>
            <s xml:id="echoid-s2049" xml:space="preserve">Cum enim cuprum præ ar-
              <lb/>
            gento ampliores poros habeat, plus admiſit ex illâ fuligine, ideò-
              <lb/>
            que maius in cupro fuit quàm in argento incrementum graui-
              <lb/>
            tatis: </s>
            <s xml:id="echoid-s2050" xml:space="preserve">& </s>
            <s xml:id="echoid-s2051" xml:space="preserve">fortaſſe non æquè purum adhibitum eſt ſulphur vtri-
              <lb/>
            que experimento, vt proinde alterius fuligines additæ fuerint
              <lb/>
            grauiores.</s>
            <s xml:id="echoid-s2052" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2053" xml:space="preserve">Maur. </s>
            <s xml:id="echoid-s2054" xml:space="preserve">Non eſt ad Sulphuris naturam, quaſi ad peculiarem
              <lb/>
            cauſam referenda hæc ponderis appendicula; </s>
            <s xml:id="echoid-s2055" xml:space="preserve">Nam laminarum
              <lb/>
            cuprearum vncia vna in depreſſo crucibulo impoſita furno pro-
              <lb/>
            batorio, ibique duas horas ſeruata, acquiſiuit ponderis grana
              <lb/>
            triginta: </s>
            <s xml:id="echoid-s2056" xml:space="preserve">& </s>
            <s xml:id="echoid-s2057" xml:space="preserve">ramentorum cupri vncia breuiſſimo crucibulo inie-
              <lb/>
            cta, atque tegulâ fornicatâ cooperta, in furno probatorio ad
              <lb/>
            tres horas relicta, demum deprehenſa eſt granis quadraginta
              <lb/>
            nouem aucta. </s>
            <s xml:id="echoid-s2058" xml:space="preserve">Similiter vncia ſtanni Anglici in catino tegulâ for-
              <lb/>
            nicatâ cooperto poſt duas horas extracta è furno probè calcinata,
              <lb/>
            drachmam integram lucrata fuerat. </s>
            <s xml:id="echoid-s2059" xml:space="preserve">Item ramentorum chalybeo-
              <lb/>
            rum drachmæ quatuor per duas horas in catino ſub fornicatâ
              <lb/>
            tegulâ detentæ incrementum ponderis acquirebant vnius drachmę
              <lb/>
            & </s>
            <s xml:id="echoid-s2060" xml:space="preserve">granorum ſex cum quadrante. </s>
            <s xml:id="echoid-s2061" xml:space="preserve">Hìc nullæ interceſſerunt ſulphu-
              <lb/>
            ris fuligines.</s>
            <s xml:id="echoid-s2062" xml:space="preserve"/>
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          <p>
            <s xml:id="echoid-s2063" xml:space="preserve">Grad. </s>
            <s xml:id="echoid-s2064" xml:space="preserve">Experimenta huiuſmodi ab ingenuo viro producta quis
              <lb/>
            niſi plenus inconſiderantiſſimæ, ac dementiſſimæ temeritatis infi-
              <lb/>
            cietur? </s>
            <s xml:id="echoid-s2065" xml:space="preserve">Hìc mihi tamen ex animo euellendus eſt ſcrupulus, qui
              <lb/>
            me non parum ſtimulans adhuc ancipitem reddit. </s>
            <s xml:id="echoid-s2066" xml:space="preserve">An non & </s>
            <s xml:id="echoid-s2067" xml:space="preserve">ignis
              <lb/>
            iſte, quem Reuerberij vocant: </s>
            <s xml:id="echoid-s2068" xml:space="preserve">ſuas habet fuligines, quæ etiam
              <lb/>
            ſub tegulam inſinuare ſe valeant in crucibulum, & </s>
            <s xml:id="echoid-s2069" xml:space="preserve">metallo commi-
              <lb/>
            ſceri, cui proinde pondus addant?</s>
            <s xml:id="echoid-s2070" xml:space="preserve"/>
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          <p>
            <s xml:id="echoid-s2071" xml:space="preserve">Dand. </s>
            <s xml:id="echoid-s2072" xml:space="preserve">At fuligini ipſi igniculos ineſſe non paucos contendent
              <lb/>
            igneæ grauitatis aſſertores. </s>
            <s xml:id="echoid-s2073" xml:space="preserve">Certè ſi fuliginem in aquâ diſſolutam
              <lb/>
            tandiu coquas, donec ſanguinis inſtar aqua rubeſcat, tum hanc
              <lb/>
            terreo vaſe exceptam brumali tempore exponas frigori maximo,
              <lb/>
            adeò vt tota demum in glaciem albam concreſcat; </s>
            <s xml:id="echoid-s2074" xml:space="preserve">ſi omnia con-
              <lb/>
            fringantur, in mediâ glacie reperies oleum maximè calidum in-
              <lb/>
            ſtar ſanguinis rubrum, quod præſtantiſſimum dicitur </s>
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