Casati, Paolo, De igne dissertationes physicae, 1686
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            <s xml:id="echoid-s6973" xml:space="preserve">
              <pb o="229" file="0241" n="241" rhead="De Flamma & Fumo."/>
            nebant, ac tectum diſijceret. </s>
            <s xml:id="echoid-s6974" xml:space="preserve">Quapropter cautiùs operantur, qui
              <lb/>
            ſpeculo plano excipientes Solis radium, illum in aliud ſpeculum
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            intorquent, ex quo in puteum reflectitur: </s>
            <s xml:id="echoid-s6975" xml:space="preserve">Mihique contigit ali-
              <lb/>
            quando hac arte obſeruare aquæ motum in puteo alto cubitos octo-
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            ginta, excepto per feneſtram ſolis radio. </s>
            <s xml:id="echoid-s6976" xml:space="preserve">Non omnes tamen pu-
              <lb/>
            teos, ex quibus aqua ſalſa hauritur admiſtam habere Naphtham,
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            conſtat ex ſalinis fontibus Hallæ Saxonum, vbi operarij, vt adue-
              <lb/>
            nis fontium profunditatem commonſtrent, in eos demittunt ſtra-
              <lb/>
            mineas faces, ſinè tamen vllo vaporum incendio.</s>
            <s xml:id="echoid-s6977" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6978" xml:space="preserve">Grad. </s>
            <s xml:id="echoid-s6979" xml:space="preserve">Non longè à probabilitate abeſt inferiorem putei partém
              <lb/>
            repletam fuiſſe vaporibus illis pinguibus, qui ſubitâ flammâ exar-
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            deſcentes tanto impetu eruperunt. </s>
            <s xml:id="echoid-s6980" xml:space="preserve">Cœterùm ſi naphthæ guttas
              <lb/>
            aliquot aquæ innatantes admota candela accendat, obſeruatum
              <lb/>
            eſt illius ardorem in aquâ aliquanto diutiùs perſeuerare, quàm
              <lb/>
            ſi in ſicco vaſe eadem naphthæ quantitas incendatur: </s>
            <s xml:id="echoid-s6981" xml:space="preserve">id quod
              <lb/>
            fortaſſe tribuendum aliquis putetaquæ cohibenti, ne ſulphureæ
              <lb/>
            particulæ toto ſuo impetu agitentur, & </s>
            <s xml:id="echoid-s6982" xml:space="preserve">naphtham citiùs diſſol-
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            uant; </s>
            <s xml:id="echoid-s6983" xml:space="preserve">in ſicco autem vaſe nihil prohibet: </s>
            <s xml:id="echoid-s6984" xml:space="preserve">At aqua non com-
              <lb/>
            plectitur guttarum innatantium niſi tenuiſſimam partem, quæ
              <lb/>
            mergitnr pro ratione grauitatis ſpecificæ. </s>
            <s xml:id="echoid-s6985" xml:space="preserve">An ideò diu durat,
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            quia ſubiecta aqua ſuo frigore nititur conſtipare ſulphureas
              <lb/>
            particulas naphthæ ſibi proximas, quæ propterea languidiùs
              <lb/>
            agitentur?</s>
            <s xml:id="echoid-s6986" xml:space="preserve"/>
          </p>
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            <s xml:id="echoid-s6987" xml:space="preserve">Dand. </s>
            <s xml:id="echoid-s6988" xml:space="preserve">His aliud adnecte in artificioſis ignibus, qui in aquis
              <lb/>
            conflâgrant, obſeruatum, videlicet eos ampliore flammâ collu-
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            cere; </s>
            <s xml:id="echoid-s6989" xml:space="preserve">plerunque autem ex Naphtha, Sulphure, & </s>
            <s xml:id="echoid-s6990" xml:space="preserve">cerâ parantur.
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            </s>
            <s xml:id="echoid-s6991" xml:space="preserve">Non negârim quidem aliquid Optici Phænomeni intercedere; </s>
            <s xml:id="echoid-s6992" xml:space="preserve">quia
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            enimea, quæ lucent, & </s>
            <s xml:id="echoid-s6993" xml:space="preserve">noctu maiora apparent, quàm inter-
              <lb/>
            diu, & </s>
            <s xml:id="echoid-s6994" xml:space="preserve">remota maiorem in oculo ſui imaginem imprimunt, quàm
              <lb/>
            vicina, huiuſmodi verò ignium artificioſa ſpectacula in aquis exhi-
              <lb/>
            bentur noctu, & </s>
            <s xml:id="echoid-s6995" xml:space="preserve">à ſpectatoribus abſunt, idcirco nil mirum ſi
              <lb/>
            amplior flamma videatur: </s>
            <s xml:id="echoid-s6996" xml:space="preserve">præterquam quod ad ſpectantium ocu-
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            los non ſoli radij directi, ſed etiam ab aquâ reflexi veniunt, & </s>
            <s xml:id="echoid-s6997" xml:space="preserve">
              <lb/>
            maiorem lucis ſpeciem in oculi retinâ pingunt. </s>
            <s xml:id="echoid-s6998" xml:space="preserve">Re tamen verâ
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            flammam ipſam augeri exiſtimo, calore ſcilicet accenſi ſulphuris
              <lb/>
            aqua in vaporem ſoluta miſcetur erumpentibus igniculis, & </s>
            <s xml:id="echoid-s6999" xml:space="preserve">
              <lb/>
            amplior flamma gignitur; </s>
            <s xml:id="echoid-s7000" xml:space="preserve">adeoque cum nequeant tam celeriter
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            auolare ſic permiſti exilientes igniculi, diutiùs flamma durat, </s>
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