Casati, Paolo, De igne dissertationes physicae, 1686

Table of handwritten notes

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              <pb o="36" file="0048" n="48" rhead="Diſſertatio Tertia."/>
            Omnes breuiſſimi itineris tractu deficiunt, nuſquam apparentes:
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            <s xml:id="echoid-s1272" xml:space="preserve">& </s>
            <s xml:id="echoid-s1273" xml:space="preserve">illas ſupra omnem aërem vſque in regionem Lunari cœlo finiti-
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            mam ſubuolare arbitrabimur? </s>
            <s xml:id="echoid-s1274" xml:space="preserve">Audiui quidem iſta ſæpiùs, ſed nun-
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            quam adductus ſum, vt crederem. </s>
            <s xml:id="echoid-s1275" xml:space="preserve">Certè corpus illud, quod
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            noſtrum aërem, ſiuè Atmoſphæram circumplectitur, quicquid il-
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            lud ſit, ſi Ariſtotelem lib.</s>
            <s xml:id="echoid-s1276" xml:space="preserve">1.</s>
            <s xml:id="echoid-s1277" xml:space="preserve">Meteor. </s>
            <s xml:id="echoid-s1278" xml:space="preserve">ſumma 1.</s>
            <s xml:id="echoid-s1279" xml:space="preserve">cap.</s>
            <s xml:id="echoid-s1280" xml:space="preserve">4. </s>
            <s xml:id="echoid-s1281" xml:space="preserve">audiamus,
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            *propter conſuetudinem vocamusignem, non eſt autem ignis*: </s>
            <s xml:id="echoid-s1282" xml:space="preserve">ignem
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            autem non eſſe ex eo probat, quod ab ignis Naturâ diſtat, *exceßus*
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            *enim*, inquit, *calidi, & </s>
            <s xml:id="echoid-s1283" xml:space="preserve">veluti feruor, eſt ignis.</s>
            <s xml:id="echoid-s1284" xml:space="preserve">* Illud fateor eſ-
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            ſe leuiſſimum, vtpotè à centro grauium & </s>
            <s xml:id="echoid-s1285" xml:space="preserve">leuium maximè ſeiun-
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            ctum; </s>
            <s xml:id="echoid-s1286" xml:space="preserve">& </s>
            <s xml:id="echoid-s1287" xml:space="preserve">ſi quid habeat aliquando cum hiſce inferioribus com-
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            mercij, diſſoluto vinculo aërem penetrabit, & </s>
            <s xml:id="echoid-s1288" xml:space="preserve">ſuam in ſedem re-
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            meabit; </s>
            <s xml:id="echoid-s1289" xml:space="preserve">ſed vtrùm ignis ſit, validioribus rationibus demonſtrari
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            velim, vt aſſenſum præbeam.</s>
            <s xml:id="echoid-s1290" xml:space="preserve"/>
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            <s xml:id="echoid-s1291" xml:space="preserve">Dand. </s>
            <s xml:id="echoid-s1292" xml:space="preserve">Si, quæ iacebat obſoleta, nunc verò maximè vigere in-
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            cipit philoſophandi ratio, facilem apud nos aditum inueniât, vix
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            vllus relinquitur huic quæſtioni locus, qua in diſputationem voca-
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            mus, quiſnam igni debitus ſit in hac rerum vniuerſitate locus.
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            </s>
            <s xml:id="echoid-s1293" xml:space="preserve">Omnia nunc grauitatem affectant; </s>
            <s xml:id="echoid-s1294" xml:space="preserve">nihil eſt leue; </s>
            <s xml:id="echoid-s1295" xml:space="preserve">nihil ſponte ſuâ
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            aſcendit, ſed omnia pondus habent, quo ad globi huius terra-
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            quei centrum connituntur, & </s>
            <s xml:id="echoid-s1296" xml:space="preserve">ſi quod corpus ab huiuſmodi cen-
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            tro abſcedit, à proximo corpore grauiore ſurſum extruditur, at-
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            que eatenus ſolùm leue dici poterit, quatenus minori grauitate
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            eſt præditum. </s>
            <s xml:id="echoid-s1297" xml:space="preserve">Quapropter ſi corpora omnia inſitâ ſibi grauitate,
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            licèt diſpari, perpetuò conantur ad centrum tendere, in quo dun-
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            taxat conquieſcerent, vnus dicendus eſt omnibus debitus locus,
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            videlicet centrum, adeoque ignis locus proprius non eſt, ſed cum
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            cœteris elementis communis. </s>
            <s xml:id="echoid-s1298" xml:space="preserve">Quanquam enim huius Philoſophiæ
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            ſectatores de ignis grauitate verba expreſse non faciant, illi tamen
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            ſi poſitiuam leuitatem adſtruerent Igni, non video, cur ſuam leui-
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            tatem Aëri adimant, quem tamen grauem eſſe, & </s>
            <s xml:id="echoid-s1299" xml:space="preserve">deorſum cona-
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            ri, pugnaciſſimè defendunt; </s>
            <s xml:id="echoid-s1300" xml:space="preserve">quandoquidem ſi in aquâ aër ſpon-
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            te ſuâ non aſcendit, ſed ab illâ deorſum validiùs conante ſurſum
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            extruditur, conſentaneum eſt flammam pariter ab aëre grauiore
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            ſurſum extrudi. </s>
            <s xml:id="echoid-s1301" xml:space="preserve">Terram ſcilicet, & </s>
            <s xml:id="echoid-s1302" xml:space="preserve">Aquam, & </s>
            <s xml:id="echoid-s1303" xml:space="preserve">Aërem idcirco ad
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            centrum perpetuo niſu conari autumant, vt moles hæc vniuerſa
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            conſiſtat particulis omnibus preſsè cohærentibus, nullòque hiatu
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            diſiunctis. </s>
            <s xml:id="echoid-s1304" xml:space="preserve">Ad hanc igitur vniuerſi concinnitatem æquè </s>
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