Boyle, Robert, New experiments physico-mechanicall, touching the spring of the air and its effects, 1660

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            <p type="main">
              <s>
                <pb xlink:href="013/01/328.jpg" pagenum="298"/>
              it appears that a Cylinder of Mercury,
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              able to ballance a Cylinder of the whole
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              Atmoſphere, amounted to near about
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              thirty Inches; and ſince, conſequently
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              we may aſſume the proportion of Quick­
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              ſilver to Air to be as fourteen thouſand to
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              one; it will follow, that a Cylinder of
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              Air, capable to maintain an
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              Æquilibrium,
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              with a Mercurial Cylinder of two Foot
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              and an half in height, muſt amount to
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              35000 Feet of our Engliſh Meaſure;
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              and conſequently (reckoning five Foot
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              to a Geometrical Pace, and one thouſand
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              ſuch Paces to a Mile) to ſeven full
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              Miles. </s>
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            <p type="margin">
              <s>
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            <p type="main">
              <s>But this (as we lately intimated) pro­
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              ceeds upon the ſuppoſition, that the Air
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              is every where of the ſame conſiſtence
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              that we found it near the ſurface of the
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              Earth; but that cannot with any ſafety
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              be concluded, not onely for the reaſon I
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              finde to have been taken notice of by the
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              Antients, and thus expreſt in
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              Seneca:
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              Omnis Aër
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              (ſays he)
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              quo propior eſt terris
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                <lb/>
                <arrow.to.target n="marg47"/>
                <lb/>
                <emph type="italics"/>
              hoc craſsior; quemadmodum in aqua & in
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              omni humore fæx ima eſt, it a in Aëre ſpiſ­
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              ſißima quæ〈qué〉 deſidunt;
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              but much more,
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              becauſe the ſpringy Texture of the Aërial
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              Corpuſcles, makes them capable of a </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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