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

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    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb xlink:href="013/01/091.jpg" pagenum="51"/>
              true Experiments may, by reaſon of
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              the eaſie miſtake of ſome unheeded
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              Circumſtance, be unſucceſsfully try'd;
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              we will Advertiſe, on this occaſion,
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              that we did oftentimes in vain try the
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              breaking of Bladders, after the manner
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              above-mention'd: Of which the cauſe
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              appear'd to be this, That the Bladders we
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              could not break, having been brought us
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              ready blown from thoſe that ſold them,
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              were grown dry before they came to our
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              hands: whence it came to paſs, that, if
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              we afterwards ty'd them very hard, they
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              were apt to fret and ſo become unſervice­
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              able; and if we ty'd them but moderate­
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              ly hard, their ſtiffneſs kept them from be­
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              ing cloſ'd ſo exactly, but that when the
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              included Air had in the exhauſted Recei­
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              ver diſtended them as much as eaſily it
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              could, it would in part get out between
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              the little wrinkles of the Sphincter of the
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              Neck: Whence alſo it uſually happen'd,
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              that, upon the letting in the Air from
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              without, the Bladders appear'd more flac­
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              cid and empty then before they were put
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              in; whereas when the Bladders were
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              brought us moiſt from the Butchers, we
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              could, without injuring them, tye their
                <lb/>
              necks ſo cloſe, that none of the Air once </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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