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

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              <s>
                <pb xlink:href="013/01/143.jpg" pagenum="113"/>
              is almoſt empty, ſome of the ſubtler
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              parts of the external Air may, by the
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              preſſure of the Atmoſphere, be ſtrain'd
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              through the very body of the
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              Diachylon
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              into the Receiver. </s>
              <s>But this is onely con­
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              jecture: </s>
            </p>
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              <s>Another Circumſtance of our Expe­
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              riment was this, That, if (when the
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              Quick-ſilver in the Tube was fallen low)
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              too much ingreſs were, at the hole of the
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              Stop-cock, ſuddenly permitted to the ex­
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              ternal Air; it would ruſh in with that vio­
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              lence, and bear ſo forcibly upon the ſur­
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              face of the ſubjacent Quick-ſilver, that
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              it would impel it up into the Tube rudely
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              enough to endanger the breaking of the
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              Glaſs. </s>
            </p>
            <p type="main">
              <s>We formerly mention'd, that the
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              Quick-ſilver did not in its deſcent fall as
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              much at a time after the two or three firſt
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              exſuctions of the Air, as at the beginning:
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              For, having mark'd its ſeveral Stages up­
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              on the Tube, we found, that at the firſt
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              ſuck it deſcended an Inch and 3/8, and at the
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              ſecond an Inch and 1/8; and when the Veſ­
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              ſel was almoſt empty'd, it would ſcarce at
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              one exſuction be drawn down above the
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              breadth of a Barly-corn. </s>
              <s>And indeed we
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              found it very difficult to meaſure in what </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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