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

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    <archimedes>
      <text>
        <body>
          <chap>
            <pb xlink:href="013/01/063.jpg" pagenum="23"/>
            <p type="main">
              <s>This Notion may perhaps be ſome­
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              what further explain'd, by conceiving the
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              Air near the Earth to be ſuch a heap of
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              little Bodies, lying one upon another, as
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              may be reſembled to a Fleece of Wooll.
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              </s>
              <s>For this (to omit other likeneſſes betwixt
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              them) conſiſts of many ſlender and flexi­
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              ble Hairs; each of which, may indeed,
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              like a little Spring, be eaſily bent or roul­
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              ed up; but will alſo, like a Spring, be
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              ſtill endeavouring to ſtretch it ſelf out
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              again. </s>
              <s>For though both theſe Haires,
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              and the Aerial Corpuſcles to which we
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              liken them, do eaſily yield to externall
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              preſſures; yet each of them (by vertue of
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              its ſtructure) is endow'd with a Power or
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              Principle of ſelf-Dilatation; by vertue
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              whereof, though the hairs may by a Mans
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              hand be bent and crouded cloſer together,
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              and into a narrower room then ſuits beſt
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              with the nature of the Body: Yet whil'ſt
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              the compreſſion laſts, there is in the fleece
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              they compoſe an endeavour outwards,
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              whereby it continually thruſts againſt the
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              hand that oppoſes its Expanſion. </s>
              <s>And
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              upon the removall of the external preſ­
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              ſure, by opening the hand more or leſs, the
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              compreſſed Wooll does, as it were, ſpon­
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              taneouſly expand or diſplay it ſelf towards </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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