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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              continu'd ſuſpended, began freely to drop
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              down again as formerly. </s>
              <s>And if you
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              take a Glaſs Pipe, whether it be in the
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              form of a
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              Siphon,
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              or no, that being for
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              the moſt part of the thickneſs of a Mans
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              Finger, is yet towards one end ſo ſlen­
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              der, as to terminate in a hole almoſt as
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              ſmall as a Horſe-hair; and if you fill this
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              Pipe with Water, you will finde that Li­
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              quor to drop down freely enough tho­
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              row the ſlender Extream: But if you then
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              invert the Pipe, you will finde that the
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              Air will not eaſily get in at the ſame hole
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              through which the Water paſſ'd. </s>
              <s>For in
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              the ſharp end of the Pipe, ſome Inches
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              of Water will remain ſuſpended, which
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              'tis probable would not happen, if the
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              Air could get in to ſucceed it, ſince if the
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              hole were a little wider, the Water would
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              immediatly ſubſide. </s>
              <s>And though it be
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              true, that if the Pipe be of the length of
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              many Inches, a great part of the Wa­
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              ter will run down at the wider Orifice, yet
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              that ſeems to happen for ſome other rea­
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              ſon, then becauſe the Air ſucceeds it at
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              the upper and narrow Orifice, ſince all the
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              ſlender part of the Pipe, and perhaps
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              ſome Inches more, will continue full of
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              Water. </s>
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