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="013/01/050.jpg" pagenum="10"/>
              your Lordſhip ſhould have ſuch another
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              Engine made for you) to have a hollow
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              and tapering Pipe of Glaſs drawn out,
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              whereof the Orifice above mentioned
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              was the Baſis, and then to have the cone
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              cut off with a hot Iron, within about an
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              Inch of the Points (B C.) </s>
            </p>
            <p type="main">
              <s>The uſe of the lip, is to ſuſtain the
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              cover delineated in the ſecond Figure;
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              where (D E) points out a braſs Ring, ſo
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              caſt, as that it doth within and without
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              cover the lip (B C) of the firſt Figure,
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              and is cemented on upon it with a ſtrong
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              and cloſe Cement. </s>
              <s>To the inward taper­
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              ing Orifice of this Ring (which is about
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              three Inches over) are exquiſitely ground
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              the ſides of the Braſs ſtopple (F G;) ſo
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              that the concave ſuperficies of the one,
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              and the convex of the other, may touch
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              one another in ſo many places, as may
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              leave as little acceſs, as poſſible, to the ex­
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              ternal Air: And in the midſt of this cover
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              is left a hole (H I) of about half an inch
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              over, invironed alſo with a ring or ſocket
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              of the ſame mettal, and fitted likewiſe
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              with a braſs ſtopple (K) made in the form
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              of the Key of a ſtop-cock, and exactly
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              ground into the hole (H I) it is to fill; ſo
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              as that though it be turn'd round in the </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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