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

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    <archimedes>
      <text>
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            <p type="main">
              <s>
                <pb xlink:href="013/01/056.jpg" pagenum="16"/>
              fill up all the crannies, or other little ca­
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              vities, at which the Air might otherwiſe
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              get entrance. </s>
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            <p type="main">
              <s>All things being thus fitted, and the
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              lower ſhank (O) of the ſtop-cock being
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              put into the upper Orifice of the Cylin­
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              der (&), into which it was exactly ground;
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              the Experimenter is firſt, by turning the
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              handle, to force the Sucker to the top of
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              the Cylinder, that there may be no Air
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              left in the upper part of it: Then ſhut­
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              ting the Valve with the Plug, and turning
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              the other way, he is to draw down the
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              Sucker to the bottom of the Cylinder;
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              by which motion of the Sucker, the Air
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              that was formerly in the Cylinder being
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              thruſt out, and none being permitted to
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              ſucceed in its room, 'tis manifeſt that the
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              cavity of the Cylinder muſt be empty,
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              in reference to the Air: So that if there­
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              upon the Key of the Stop-cock be ſo
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              turn'd, as that through the perforation of
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              it, a free paſſage be opened betwixt the
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              Cylinder and the Receiver, part of the
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              Air formerly contain'd in the Receiver,
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              will nimbly deſcend into the Cylinder.
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              </s>
              <s>And this Air, being by the turning back
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              of the Key hinder'd from the returning
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              into the Receiver, may, by the opening </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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