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

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              <s>
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              ly mention'd (touching fluidity and firm­
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              neſs) and ſubjoyn it here with alterations
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              ſuitable to the contrivance of our Engine;
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              and this the rather, becauſe I hope it may
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              conduce to the diſcovery of the nature of
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              the Atmoſphere: for which reaſon it
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              might have been annext to what has been
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              noted either upon the firſt, or eighteenth
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              Experiment, but that when they were
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              written and ſent away, it came not into
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              my minde. </s>
              <s>The Experiment then as we
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              try'd in our Engine, was as follows. </s>
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              <s>WE took one of the ſmall Receivers,
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                <arrow.to.target n="marg37"/>
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              often mention'd already, and into it
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              we convey'd a piece of well lighted Match;
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              and letting it remain there till it had fill'd
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              the Receiver with ſmoak, we took it out
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              and haſtily cloſ'd again the Receiver, that
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              the ſmoak might not get away. </s>
              <s>Then
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              ſtaying awhile to let theſe fumes leiſurely
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              ſubſide, we found, as we expected, that
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              after ſome time they ſetled themſelves in
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              the lower half of the Receiver, in a dark­
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              iſh Body, leaving the upper half of the
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              Receiver tranſparent, and as to ſight, full
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              of nought but clear Air. </s>
              <s>Now to mani­
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              feſt that this ſmoak thus ſetled emulated </s>
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