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="013/01/337.jpg" pagenum="307"/>
              they were wont to play up and down
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              in it, and ſo by their whiteiſhneſs, to e­
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              mulate in ſome meaſure the apparition of
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              Light. </s>
            </p>
            <p type="main">
              <s>For we likewiſe ſometimes found, by
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              watchful obſervation, that when the
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              Flaſh was great, not onely at the very
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              inſtant the Receiver loſt of its tranſpa­
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              rency, by appearing full of ſome kinde
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              of whitiſh ſubſtance; but that for ſome
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              ſhort time after the ſides of the Glaſs
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              continued ſomewhat opacous, and
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              ſeem'd to be darken'd, as if ſome
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              whitiſh Steam adher'd to the inſide of
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              them. </s>
            </p>
            <p type="main">
              <s>He that would render a Reaſon of
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              the
                <emph type="italics"/>
              Phænomenon,
                <emph.end type="italics"/>
              whereof all theſe are
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              not all the Circumſtances, muſt doe
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              two things; whereof the one is diffi­
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              cult, and the other little leſs then im­
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              poſſible: For he muſt give an Ac­
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              count not onely whence the appearing
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              whiteneſs proceeds, but wherefore that
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              whiteneſs does ſometimes appear and
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              ſometimes not. </s>
            </p>
            <p type="main">
              <s>For our part, we freely confeſſe
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              our ſelves at a loſſe about rendering </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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