Schott, Gaspar, Mechanica hydraulico-pneumatica. Pars I. Mechanicae Hydraulico-pnevmaticae Theoriam continet. , 1657

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              <s>
                <pb xlink:href="051/01/201.jpg" pagenum="170"/>
              omnique humore deſtitutam, & quàm minimùm aêris conti­
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              nentem; deprehendiſſeque pondus fuiſſe unciarum 4,
                <expan abbr="drach-marũ">drach­
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                marum</expan>
              6, & granorum 15: poſtquam verò naturaliter refrixiſſet
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              æolopila, & aër antea vehementer rarefactus redijſſet ad pri­
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              ſtinum ac naturalem ſuum ſtatum; iterum ponderaſſe ipſam,
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              & inveniſſe pondus præcedente pondere majus fuiſſe 4 gra­
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              nis. </s>
              <s>(Apud Merſennum habetur, minus; utique typographi­
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              co errore.) </s>
              <s>Erat autem bilanx, inquit Merſennus, quæ dimi­
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              dio grani perdebat æquilibrium. </s>
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            <p type="margin">
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                <emph type="italics"/>
              Aëris gra­
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              vitatem in­
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              venire.
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              </s>
            </p>
            <p type="main">
              <s>Atque ex his patet, qua ratione aëris gravitas inveniatur. </s>
              <s>
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              Alij aliter explorant pondus aëris, præſertim Illuſtriſſimus Do­
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              minus Carolus Vintimillia Eques Panormitanus in Sicilia, & Ami­
                <lb/>
              cus Uranicus ſincei iſſimus, qui legendam mihi dedit demon­
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              ſtrationem ſubtiliſſimam, praximque hydroſtaticam, qua olim
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              Adoleſcens coram Sereniſſimo Philiberto Siciliæ Prorege, No­
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              bilitateque Panormitana univerſa aërem ponderaverat. </s>
              <s>Vide
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              etiam quæ habet Daniel Lipſtorpius part. 3. Speciminum Phi­
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              loſophiæ Cartheſianæ cap. 2. in fine, ubi adducit modum Galilæi
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              & Joann. Chryſoſt. Magneni.</s>
              <s>Vide præterea Appendicem
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              in fine Operis. </s>
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            <p type="main">
              <s>
                <emph type="center"/>
              Propoſitio II.
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              </s>
            </p>
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              <s>
                <emph type="center"/>
              Quantum condenſari aër poſſit, invenire.
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              </s>
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            <p type="margin">
              <s>
                <margin.target id="marg284"/>
              Vide infrà
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              Iconiſmi
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              VIII. Figu­
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              ram IX. a.</s>
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            <p type="main">
              <s>ASſumatur fons pneumaticus, qualem deſcribimus infrà,
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              Parte 2. </s>
              <s>Claſſe 1. cap. 2. Machina 8. ejuſque capacitas exactè
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              exploretur in menſura cubica aquæ. </s>
              <s>Capiat autem dictus
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              fons, gratiâ exempli, unum pedem cubicum, ſeu libras 72. </s>
              <s>
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              In hunc fontem immitte ſyringe, per foramen C, aquam
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              quantum fieri, ſine ruptionis periculo, poteſt. </s>
              <s>Si jam notam
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              feceris in menſura, quantitatem aquæ immiſſæ, eamque à fon­</s>
            </p>
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              <s>
                <arrow.to.target n="marg285"/>
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              tis capacitate detraxeris; reſiduum fontis indicabit locum
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              aëris condenſati, qui priùs totam fontis capacitatem </s>
            </p>
          </chap>
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