Heron <Alexandrinus>, Heronis Alexandrini spiritalium liber

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              <pb o="7" file="0013" n="13" rhead="SPIRITAL. LIBER."/>
            nem faciamus, prius diſrumpetur vas, quàm aliquid ſuſci-
              <lb/>
            piat cum plenum ſit: </s>
            <s xml:id="echoid-s164" xml:space="preserve">neque enim aëris corpora in minorem
              <lb/>
            magnitudinem contrahi poſſunt: </s>
            <s xml:id="echoid-s165" xml:space="preserve">quare neceſſe erit ut in ſe
              <lb/>
            ipſis habeant quædam intervalla, in quæ compreſſa mino-
              <lb/>
            rem obtineant molem: </s>
            <s xml:id="echoid-s166" xml:space="preserve">hoc autem veriſimile non eſt, nul-
              <lb/>
            lo penitus exiſtente vacuo, & </s>
            <s xml:id="echoid-s167" xml:space="preserve">cum corpora ad ſeſe applicen-
              <lb/>
            tur ſecundum omnes ſuperficies, & </s>
            <s xml:id="echoid-s168" xml:space="preserve">ſimiliter ad vaſis ambi-
              <lb/>
            tum, non poſſunt expulſa locum alicubi facere, non exi-
              <lb/>
            ſtente vacuo aliquo: </s>
            <s xml:id="echoid-s169" xml:space="preserve">quamobrem nullo modo in ſphæra
              <lb/>
            immittc
              <unsure/>
            tur aliquid eorum, quiſunt extra, niſi excedat ali-
              <lb/>
            qua pars aëris prius in ea contenti, ſiquidem totus locus
              <lb/>
            conſtipatus eſt, & </s>
            <s xml:id="echoid-s170" xml:space="preserve">continuatus ut arbitrantur: </s>
            <s xml:id="echoid-s171" xml:space="preserve">at ſi quis
              <lb/>
            ſiphonem ori admovens ſphæram inflare velit, multum
              <lb/>
            immittet ſpiritum, non excedente aëre qui in ea eſt: </s>
            <s xml:id="echoid-s172" xml:space="preserve">quod
              <lb/>
            cum ita ſemper contingat, manifeſto oſtenditur contractio-
              <lb/>
            nem fieri corporum in ſphæra exiſtentium in vacua impli-
              <lb/>
            cata. </s>
            <s xml:id="echoid-s173" xml:space="preserve">Contractio autem præter naturam fit ob immiſſionis
              <lb/>
            violentiam: </s>
            <s xml:id="echoid-s174" xml:space="preserve">ſi igitur aliquis inflans, & </s>
            <s xml:id="echoid-s175" xml:space="preserve">ad ipſum os manum
              <lb/>
            apponens ſtatim digito ſiphonem obturet, manebit omni
              <lb/>
            tempore conſtipatus aër in ſphæra: </s>
            <s xml:id="echoid-s176" xml:space="preserve">quod ſi quis aperiat rur-
              <lb/>
            ſus extra erumpet cum magno ſtrepitu, & </s>
            <s xml:id="echoid-s177" xml:space="preserve">clamore immiſſus
              <lb/>
            aër; </s>
            <s xml:id="echoid-s178" xml:space="preserve">propterea quod, ut propoſuimus, expellitur à dilata-
              <lb/>
            tione præexiſtentis aëris impetu quodam facta: </s>
            <s xml:id="echoid-s179" xml:space="preserve">rurſus ſi
              <lb/>
            quis velit aërem, qui in ſphæra eſt ore per ſiphonem attra-
              <lb/>
            here magna copia conſequetur, nulla alia ſubſtantia in
              <lb/>
            ſphæram ſuccedente, quemadmodum in ovo ante dictum
              <lb/>
            eſt: </s>
            <s xml:id="echoid-s180" xml:space="preserve">quare ex hoc perſpicue oſtenditur magnam vacui coa-
              <lb/>
            cervationem in ſphæra factam eſſe. </s>
            <s xml:id="echoid-s181" xml:space="preserve">Non enim aëris corpo-
              <lb/>
            ra, quæ relinquuntur eo tempore majora fieri poſſunt, ita
              <lb/>
            ut expulſorum corporum locum repleant: </s>
            <s xml:id="echoid-s182" xml:space="preserve">nam ſi augeren-
              <lb/>
            tur cum nulla ipſis ſubſtantia extrinſecus accedat, veriſimile
              <lb/>
            eſſet augumentum fieri per rarefactionem: </s>
            <s xml:id="echoid-s183" xml:space="preserve">hoc autem eſt
              <lb/>
            implicatio ſecundum evacuationem. </s>
            <s xml:id="echoid-s184" xml:space="preserve">Sed vacuum nullum
              <lb/>
            eſſe dicunt: </s>
            <s xml:id="echoid-s185" xml:space="preserve">non igitur augebuntur corpora: </s>
            <s xml:id="echoid-s186" xml:space="preserve">neque </s>
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