Heron <Alexandrinus>, Heronis Alexandrini spiritalium liber

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              <pb o="3" file="0009" n="9" rhead="SPIRITAL. LIBER."/>
            ſcula cum craſſiora ſint, quam vacuum, quod lapidi ineſt,
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            nequaquam ingrediuntur, ſed exteriorem dumtaxat ſuperfi-
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            ciem contingunt.</s>
            <s xml:id="echoid-s74" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s75" xml:space="preserve">Quare cum intus non penetrent, neque etiam in eo, ut
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            in ceteris corporibus caliditatem inducunt. </s>
            <s xml:id="echoid-s76" xml:space="preserve">At aëris corpora
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            interſeſe quidem cohærent, non tamen ex omni parte, ſed
              <lb/>
            interjecta habent intervalla quædam vacua, ſicut arena,
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            quæ eſt in littoribus: </s>
            <s xml:id="echoid-s77" xml:space="preserve">itaque animo concipiendum eſt are-
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            næ particulas corporibus aëris ſimiles eſſe, aërem vero,
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            qui inter particulas arenæ interjicitur, ſimilem vacuis intra
              <lb/>
            aërem contentis, quamobrem vi quadam accedente aërem
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            denſari contingit, & </s>
            <s xml:id="echoid-s78" xml:space="preserve">in vacuorum loca reſidere, corpori-
              <lb/>
            bus præter naturam inter ſeſe compreſſis: </s>
            <s xml:id="echoid-s79" xml:space="preserve">remiſſione verò
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            facta rurſus in eundem ordinem reſtituitur, ob naturalem
              <lb/>
            corporum contentionem, quemadmodum & </s>
            <s xml:id="echoid-s80" xml:space="preserve">in cornuum
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            ramentis, & </s>
            <s xml:id="echoid-s81" xml:space="preserve">in ſpongiis ſiccis quæ ſi compreſſa remittan-
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            tur, rurſus in eundem locum redeunt, eandemque acci-
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            piunt molem: </s>
            <s xml:id="echoid-s82" xml:space="preserve">ſimiliter ſi aliqua vi aëris particulæ à ſe in-
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            vicem diſtractæ ſuerint, & </s>
            <s xml:id="echoid-s83" xml:space="preserve">major præter naturam locus
              <lb/>
            vacuus fiat, rurſus ad ſeſe recurrunt: </s>
            <s xml:id="echoid-s84" xml:space="preserve">per vacuum enim
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            celerem corporum lationem fieri contingit, nullo obſtan-
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            te, aut repellente, quouſque corpora ad ſeſe applicentur:
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            </s>
            <s xml:id="echoid-s85" xml:space="preserve">ſi quis igitur vas leviſſimum, & </s>
            <s xml:id="echoid-s86" xml:space="preserve">anguſti oris aſſumens, at-
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            que ori admovens aërem exuxerit, dimiſeritque, ex la-
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            biis ſtatim vas appendetur, vacuo carnem attrahente, ut lo-
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            cus exinanatus repleatur. </s>
            <s xml:id="echoid-s87" xml:space="preserve">Itaque ex his perſpicuum fit lo-
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            cum qui in vaſe penitus vacuum fuiſſe. </s>
            <s xml:id="echoid-s88" xml:space="preserve">Sed & </s>
            <s xml:id="echoid-s89" xml:space="preserve">hoc alia ra-
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            tione manifeſtum eſt: </s>
            <s xml:id="echoid-s90" xml:space="preserve">ova enim medica quæ ex vitro con-
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            ftant, & </s>
            <s xml:id="echoid-s91" xml:space="preserve">anguſti ſunt oris, quando volunt humido re-
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            plere, exugentes ore aërem, qui in ipſfis continetur, oſcu-
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            lumque digito comprehentes in humidum invertunt, & </s>
            <s xml:id="echoid-s92" xml:space="preserve">
              <lb/>
            digito remiſſo in locum exinanitum attrahitur aqua, at-
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            que id ipſum humidum præter naturam ſurſum fertur,
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            & </s>
            <s xml:id="echoid-s93" xml:space="preserve">quod circa cucurbitulam contingit non utique </s>
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