Casati, Paolo, De igne dissertationes physicae, 1686

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            <s xml:id="echoid-s2105" xml:space="preserve">
              <pb o="65" file="0077" n="77" rhead="De ignis loco."/>
            Auri tinctura pag. </s>
            <s xml:id="echoid-s2106" xml:space="preserve">4. </s>
            <s xml:id="echoid-s2107" xml:space="preserve">allatum. </s>
            <s xml:id="echoid-s2108" xml:space="preserve">Solue, inquit, metallum ſulphu-
              <lb/>
            reum aliquod, vt ferrum, aut cuprum, quouis ſpiritu acido:
              <lb/>
            </s>
            <s xml:id="echoid-s2109" xml:space="preserve">denuòque abſtrahe ſpiritum: </s>
            <s xml:id="echoid-s2110" xml:space="preserve">id quod remanet candefacito, non
              <lb/>
            tamen nimis, ſed quantum ſufficit ad omnimodam ſpirituum ex-
              <lb/>
            pirationem. </s>
            <s xml:id="echoid-s2111" xml:space="preserve">Reliquam huiuſmodi materiam (obſeruato priùs
              <lb/>
            illius pondere) crucibulo immiſſam colloca in igne (caue tamen,
              <lb/>
            ne fluat metallum, ſed ſaltem obſcurè candeat cum crucibulo)
              <lb/>
            trium vel quatuor hebdomadum ſpatio. </s>
            <s xml:id="echoid-s2112" xml:space="preserve">Quo tempore elapſo,
              <lb/>
            iterum exemptum metallum ad libræ lances examina, & </s>
            <s xml:id="echoid-s2113" xml:space="preserve">re ipſa
              <lb/>
            euidens experiere metalli tui incrementum. </s>
            <s xml:id="echoid-s2114" xml:space="preserve">Alterum eſt, quod
              <lb/>
            ille vocat Euidentius. </s>
            <s xml:id="echoid-s2115" xml:space="preserve">Colloca cuprum, vel aliud metallum ſul-
              <lb/>
            phureum cum 16 vel 18 partibus plumbi in cupellâ optimè cre-
              <lb/>
            matâ factâ è cineribus ligni vel oſſium, in fornace docimaſticà
              <lb/>
            (obſeruato priùs exactiſſimè pondere cupellæ, cupri, & </s>
            <s xml:id="echoid-s2116" xml:space="preserve">plumbi)
              <lb/>
            & </s>
            <s xml:id="echoid-s2117" xml:space="preserve">igne, non tamen nimio, fac euaneſcere cum plumbo cuprum. </s>
            <s xml:id="echoid-s2118" xml:space="preserve">
              <lb/>
            Quo facto exime cupellam, vbi refrixerit: </s>
            <s xml:id="echoid-s2119" xml:space="preserve">& </s>
            <s xml:id="echoid-s2120" xml:space="preserve">illam denuò exami-
              <lb/>
            natam librâ reperies longè grauiorem, ita vt pondus eius (quam-
              <lb/>
            uis multum plumbi in auras abierit in cupellatione) excedat non
              <lb/>
            modò proprium ſed etiam cupri & </s>
            <s xml:id="echoid-s2121" xml:space="preserve">plumbi pondus. </s>
            <s xml:id="echoid-s2122" xml:space="preserve">Quid additum
              <lb/>
            eſt præter ignem?</s>
            <s xml:id="echoid-s2123" xml:space="preserve"/>
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            <s xml:id="echoid-s2124" xml:space="preserve">Grad. </s>
            <s xml:id="echoid-s2125" xml:space="preserve">Quanquam ſatis perſpectum habeam à non paucis hanc
              <lb/>
            igniculorum irruptionem in vaſa igni expoſita improbari, neque
              <lb/>
            prorſus velint aquam ſubditis ignibus efferueſcere, quòd illi cali-
              <lb/>
            da effluuia per vaſis meatus illapſa commiſceantur; </s>
            <s xml:id="echoid-s2126" xml:space="preserve">Ego tamen ab
              <lb/>
            hac philoſophandi methodo non abhorreo, & </s>
            <s xml:id="echoid-s2127" xml:space="preserve">facilè adducor, vt
              <lb/>
            admittam tenuiſſimas ignium particulas ita ſe in metallorum po-
              <lb/>
            ros inſinuare, vt illis implicatæ & </s>
            <s xml:id="echoid-s2128" xml:space="preserve">permiſtæ cohæreant. </s>
            <s xml:id="echoid-s2129" xml:space="preserve">Verùm
              <lb/>
            ab illâ tam penitùs inſitâ, tam vetuſtâ opinione, quæ lycea op-
              <lb/>
            pleuit, nec ſolùm ad opinionem vulgi retenta videtur, de Ignis
              <lb/>
            leuitate, cum eâ iam tum puer imbutus fuerim, non adeò prom-
              <lb/>
            ptè me expedio; </s>
            <s xml:id="echoid-s2130" xml:space="preserve">propterea me omnem priùs in partem verſo, quàm
              <lb/>
            illam ex animo excutiam. </s>
            <s xml:id="echoid-s2131" xml:space="preserve">Liceat igitur ſic ratiocinari. </s>
            <s xml:id="echoid-s2132" xml:space="preserve">Fingamus
              <lb/>
            molem ali quam ex ferro & </s>
            <s xml:id="echoid-s2133" xml:space="preserve">ligno compoſitam, huiuſque molis gra-
              <lb/>
            uitatem in aquâ examinemus. </s>
            <s xml:id="echoid-s2134" xml:space="preserve">Tum moles illa in ardenti fornace
              <lb/>
            tantiſper retineatur, dum lignum vi ignis abſumatur; </s>
            <s xml:id="echoid-s2135" xml:space="preserve">aut potiùs
              <lb/>
            (nequam fortè additi ponderis ſuſpicionem ingerant igniculi) cul-
              <lb/>
            tro eximantur aut omnes, aut plurimæ partes ligni. </s>
            <s xml:id="echoid-s2136" xml:space="preserve">Deinde ite-
              <lb/>
            rum in aquâ examinetur molis illius grauitas, & </s>
            <s xml:id="echoid-s2137" xml:space="preserve"/>
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