Heron <Alexandrinus>, Heronis Alexandrini spiritalium liber

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            eſt ab iis, quæ diximus: </s>
            <s xml:id="echoid-s94" xml:space="preserve">ſiquidem corpori admotæ non
              <lb/>
            ſolum non excidunt manifeſtam gravitatem habentes, ſed
              <lb/>
            adjacentem materiam per corporis raritates attrahunt ean-
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            dem ob cauſſam: </s>
            <s xml:id="echoid-s95" xml:space="preserve">injectus enim ignis corrumpit, & </s>
            <s xml:id="echoid-s96" xml:space="preserve">exte-
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            nuat aërem qui in ipſis continetur, quemadmodum & </s>
            <s xml:id="echoid-s97" xml:space="preserve">
              <lb/>
            alia corpora ab igne corrumpuntur, & </s>
            <s xml:id="echoid-s98" xml:space="preserve">in tenuiores ſub-
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            ſtantias mutantur. </s>
            <s xml:id="echoid-s99" xml:space="preserve">Dico autem aërem, aquam & </s>
            <s xml:id="echoid-s100" xml:space="preserve">terram:
              <lb/>
            </s>
            <s xml:id="echoid-s101" xml:space="preserve">nam corrumpi quidem manifeſtum eſt ex derelictis carboni-
              <lb/>
            bus. </s>
            <s xml:id="echoid-s102" xml:space="preserve">Ii enim molem ſervantes eandem quàm à principio
              <lb/>
            ante combuſtionem habuerunt, vel paulo minorem, gra-
              <lb/>
            vitate plurimum differunt. </s>
            <s xml:id="echoid-s103" xml:space="preserve">Quæ autem in corporibus cor-
              <lb/>
            rumpuntur per fumum in igneam ſubſtantiam, & </s>
            <s xml:id="echoid-s104" xml:space="preserve">aëream,
              <lb/>
            & </s>
            <s xml:id="echoid-s105" xml:space="preserve">terrenam tranſeunt. </s>
            <s xml:id="echoid-s106" xml:space="preserve">Nam quæ tenuiora ſunt in ſuperio-
              <lb/>
            rem locum feruntur, ubi eſt & </s>
            <s xml:id="echoid-s107" xml:space="preserve">ignis: </s>
            <s xml:id="echoid-s108" xml:space="preserve">quæ vero his paulo
              <lb/>
            craſſiora in aërem; </s>
            <s xml:id="echoid-s109" xml:space="preserve">& </s>
            <s xml:id="echoid-s110" xml:space="preserve">quæ adhuc craſſiora ſimul cum his
              <lb/>
            aliquantulum ſublata ob continuam lationem rurſus in in-
              <lb/>
            feriorem locum deſcendunt, ac terrenis junguntur. </s>
            <s xml:id="echoid-s111" xml:space="preserve">Mu-
              <lb/>
            tatur autem & </s>
            <s xml:id="echoid-s112" xml:space="preserve">aqua ab igne corrupta in aerem; </s>
            <s xml:id="echoid-s113" xml:space="preserve">vapores
              <lb/>
            enim ex ardentibus lebetibus nihil aliud ſunt, niſi humidi
              <lb/>
            extenuationes, quæ in aerem tranſeunt. </s>
            <s xml:id="echoid-s114" xml:space="preserve">Itaque ignem
              <lb/>
            diſſolvere omnia ſe ipſo craſſiora, & </s>
            <s xml:id="echoid-s115" xml:space="preserve">tranſmutare ex jam
              <lb/>
            dictis manifeſtum eſt, & </s>
            <s xml:id="echoid-s116" xml:space="preserve">ex his quæ à terra fiunt exhalatio-
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            nibus tranſmutantur craſſiora corpora in tenuiores ſubſtan-
              <lb/>
            tias: </s>
            <s xml:id="echoid-s117" xml:space="preserve">rores enim non aliter ſurſum ſeruntur, niſi aqua quæ
              <lb/>
            in terra eſt ab exhalatione ſuerit extenuata, ipſa autem ex-
              <lb/>
            halatio fit ab ignea quadam ſubſtantia ſolis ſub terra exiſten-
              <lb/>
            tis, & </s>
            <s xml:id="echoid-s118" xml:space="preserve">calefacientis locum illum, & </s>
            <s xml:id="echoid-s119" xml:space="preserve">magis vel ſulfureum, vel
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            bituminoſum, qui quidem calefactus plerunque exhala-
              <lb/>
            tionem generat, & </s>
            <s xml:id="echoid-s120" xml:space="preserve">aquæ calidæ, quæ in terra inveniun-
              <lb/>
            tur ex eadem cauſſa fiunt, roris autem tenuiores partes in
              <lb/>
            aërem tranſmutantur, craſſiores aliquantulum ſublatæ ob
              <lb/>
            exhalationis vim, hac refrigerata ſecundum ſolis conver-
              <lb/>
            ſionem rurſus in inferiorem locum deferuntur, at venti
              <lb/>
            oriuntur ex vehementi exhalatione aëris, tum expulſi, </s>
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