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

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    <archimedes>
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              <s>
                <pb xlink:href="013/01/238.jpg" pagenum="208"/>
              turn'd the Key and ſtopt the Valve, yet we
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              could plainly hear the noiſe made by the
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              ballance, though we held our Ears ſome­
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              times at two Foot diſtance from the out­
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              ſide of the Receiver. </s>
              <s>And this Experi­
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              ment being reiterated in another place,
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              ſucceded after the like manner. </s>
              <s>Which
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              ſeems to prove, that whether or no the
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              Air be the onely, it is at leaſt, the princi­
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              pal medium of Sounds. </s>
              <s>And by the way
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              it is very well worth noting, that in a Veſ­
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              ſel ſo well cloſ'd as our Receiver, ſo weak
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              a pulſe as that of the ballance of a Watch
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              ſhould propagate a motion to the Ear in a
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              Phiſically ſtraight Line, notwithſtanding
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              the interpoſition of ſo cloſe a Body as
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              Glaſs, eſpecially Glaſs of ſuch thickneſs
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              as that of our Receiver; ſince by this it
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              ſeems that the air impriſon'd in the Glaſs,
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              muſt, by the motion of the ballance, be
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              made to beat againſt the concave part of
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              the Receiver, ſtrongly enough to make
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              its convex part beat upon the contiguous
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              Air, and ſo propagate the motion to the
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              Liſtners ears. </s>
              <s>I know this cannot but
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              ſeem ſtrange to thoſe, who, with an emi­
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              nent Modern Philoſopher, will not allow
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              that a Sound, made in the cavity of a
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              Room, or other place ſo cloſ'd, that there </s>
            </p>
          </chap>
        </body>
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    </archimedes>
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