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

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          <chap>
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              <s>
                <pb xlink:href="013/01/275.jpg" pagenum="245"/>
              der that attracted this weight to obviate
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              a
                <emph type="italics"/>
              Vacuum,
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              will ſcarce be ſatisfactory; un­
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              leſs it can be cleerly made out by what li­
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              tle hooks, or other grappling Inſtruments,
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              the internal Air could take hold of the
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              Sucker; how ſo litle of it obtain'd the
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              force to lift up ſo great a weight; and why
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              alſo, upon the letting in of a litle more
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              Air into one of our evacuated Veſ­
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              ſels, the attraction is, inſtead of being
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              ſtrengthen'd, much weaken'd, though,
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              if there were danger of a
                <emph type="italics"/>
              Vacuum
                <emph.end type="italics"/>
              be­
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              fore, it would remain, notwithſtanding
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              this ingreſs of a little Air. </s>
              <s>For that ſtill
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              there remain'd in the capacity of the ex­
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              hauſted Cylinder ſtore of little rooms,
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              or ſpaces empty or devoid of Air, may
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              appear by the great violence wherewith
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              the air ruſhes in, if any way be open'd to it.
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              </s>
              <s>And that 'tis not ſo much the decrement
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              of the
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              Vacuum
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              within the cavity of the
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              veſſel that debilitates the attraction, as the
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              ſpring of the included air (whoſe preſence
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              makes the decrement) that does it by
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              reſiſting the preſſure of the external Air,
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              ſeems probable, partly from the Diſabi­
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              lity of vacuities, whether greater or leſſer,
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              to reſiſt the preſſure of the Air; and part­
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              ly by ſome of the
                <emph type="italics"/>
              Phænomena
                <emph.end type="italics"/>
              of our Ex-</s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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