Casati, Paolo, De igne dissertationes physicae, 1686

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              <pb o="37" file="0049" n="49" rhead="De ignis loco."/>
            cenſenda eſſet ignis grauitas, vt & </s>
            <s xml:id="echoid-s1305" xml:space="preserve">ibi nihil hians, interceptâ ina-
              <lb/>
            nitate, deprehendatur: </s>
            <s xml:id="echoid-s1306" xml:space="preserve">aut, ſi ſatis eſſet ignem ſuo ſe ſupremo in
              <lb/>
            loco tutari, quin deorſum conetur, cur & </s>
            <s xml:id="echoid-s1307" xml:space="preserve">aër eodem iure non
              <lb/>
            vtatur, omni ademptâ grauitate? </s>
            <s xml:id="echoid-s1308" xml:space="preserve">Quare igni pariter ſua tribuen-
              <lb/>
            da eſt grauitas, eiuſque locus eſt centrum, niſi prohibeatur.</s>
            <s xml:id="echoid-s1309" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1310" xml:space="preserve">Grad. </s>
            <s xml:id="echoid-s1311" xml:space="preserve">Hoc omnino conſequens eſſe video, ſi aëri tribuatur
              <lb/>
            grauitas, & </s>
            <s xml:id="echoid-s1312" xml:space="preserve">ignem grauem eſſe: </s>
            <s xml:id="echoid-s1313" xml:space="preserve">ſed priùs aërem omnem perpetuò
              <lb/>
            deorſum niti, perſuaderi mihi non opinione ſolùm, ſed ad verita-
              <lb/>
            tem planè velim.</s>
            <s xml:id="echoid-s1314" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1315" xml:space="preserve">Dand. </s>
            <s xml:id="echoid-s1316" xml:space="preserve">Pluribus experimentis id ſatis conſtare putant, quorum
              <lb/>
            belliſſimè & </s>
            <s xml:id="echoid-s1317" xml:space="preserve">perſpicuè rationes & </s>
            <s xml:id="echoid-s1318" xml:space="preserve">cauſas proferunt ex aëris graui-
              <lb/>
            tate, cùm vulgaris Philoſophia vix ægrè ſatisfaciat.</s>
            <s xml:id="echoid-s1319" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1320" xml:space="preserve">Grad. </s>
            <s xml:id="echoid-s1321" xml:space="preserve">An rerum naturas ex facili explicatione metiri oportet?
              <lb/>
            </s>
            <s xml:id="echoid-s1322" xml:space="preserve">Quia Philolaicum ſyſtema Solem immotum in centro Orbis Annui
              <lb/>
            collocans, & </s>
            <s xml:id="echoid-s1323" xml:space="preserve">tellurem in eiuſdem peripheriâ circumagens, erran-
              <lb/>
            tium ſyderum Phænomena nitidiùs atque breuiùs explicat, & </s>
            <s xml:id="echoid-s1324" xml:space="preserve">diur-
              <lb/>
            na telluris circa ſuum axem conuolutio ſydera certis inſixa ſedibus
              <lb/>
            abſoluit à velociſſimo motu, propterea Soli, atque Firmamenti
              <lb/>
            ſtellis quietem, Telluri motum concedemus? </s>
            <s xml:id="echoid-s1325" xml:space="preserve">Quia ſummè opero-
              <lb/>
            ſum eſſet ſpirarum, quas Planetæ ſuo motu deſcribunt, rationes
              <lb/>
            inire, faciliùs autem per Excentricos & </s>
            <s xml:id="echoid-s1326" xml:space="preserve">Epicyclos motuum anoma-
              <lb/>
            lias ad calculos reuocamus, an ideò re ipſâ diſtinguitur cœlum in
              <lb/>
            orbes circulis illis reſpondentes? </s>
            <s xml:id="echoid-s1327" xml:space="preserve">Rerum omnium conditor Deus,
              <lb/>
            qui mundum tradidit diſputationi hominum, legem motibus ſta-
              <lb/>
            tuit, non quam illi facilè caperent, aut explicarent, ſed quæ ip-
              <lb/>
            ſarum rerum naturis, & </s>
            <s xml:id="echoid-s1328" xml:space="preserve">vniuerſitatis bono congrueret. </s>
            <s xml:id="echoid-s1329" xml:space="preserve">Aliud eſt
              <lb/>
            Hypotheſes ingeniosè confingere, aliud veritatem ipſam inueſti-
              <lb/>
            gare: </s>
            <s xml:id="echoid-s1330" xml:space="preserve">idcirco, quamuis ſuppoſita illa aëris grauitas non parùm
              <lb/>
            dilucidè experimentis ſatisfaceret, mera Hypotheſis eſt, niſi grauia
              <lb/>
            argumenta rei tam dubiæ faciant fidem. </s>
            <s xml:id="echoid-s1331" xml:space="preserve">Quid enim prohibet,
              <lb/>
            explosâ omni grauitate, ſolam leuitatem ſtatuere, adeò vt le-
              <lb/>
            uiora corpora deorſum protrudant naturas minùs leues, quæ cum
              <lb/>
            illis comparatæ graues videantur? </s>
            <s xml:id="echoid-s1332" xml:space="preserve">Si vtris aĕre inflati, & </s>
            <s xml:id="echoid-s1333" xml:space="preserve">aquæ
              <lb/>
            immerſi, conatum, quo manum deprimentis repellit, non aëri ſuâ
              <lb/>
            leuitate ſurſum connitenti tribuendum ducas, ſed aquæ grauitati
              <lb/>
            extrudenti minorem aëris grauitatem; </s>
            <s xml:id="echoid-s1334" xml:space="preserve">ego viciſſim ſaxa, & </s>
            <s xml:id="echoid-s1335" xml:space="preserve">plum-
              <lb/>
            bum, leuia dixero, ſed minùs leuia quàm aër & </s>
            <s xml:id="echoid-s1336" xml:space="preserve">aqua, eorumque
              <lb/>
            momentum deorſum aduersùs manum ſuſtinentis tribuam </s>
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