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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              that the included ſubſtance might not get
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              away. </s>
              <s>Then ſlipping it off from the
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              Æo­
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              lipile
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              we convey'd it into our Receiver, to
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              try whether or no that which in part di­
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              ſtended the Bladder would appear by its
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              Spring to be true Air: whereby we found
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              that upon the exſuction of the ambient
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              Air, the included ſubſtance expanded it
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              ſelf and the Bladder to a very much great­
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              er bulk then it was of before. </s>
              <s>And for
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              further ſatisfaction, having again taken
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              out the Bladder, we ſuffer'd it to remain
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              ty'd up till next morning, to try whether
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              time, and the coldneſs of the night, would
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              make the contain'd ſubſtance relapſe in­
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              to Water: But the next Morning we
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              found it little leſs tumid then before. </s>
              <s>I
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              remember, I ſay, that I once made this
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              Experiment; but I might ſay in anſwer
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              to it, that the chief reaſon of my men­
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              tioning it, is, To let Your Lordſhip ſee
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              how requiſite it is to be circumſpect and
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              conſiderate, when we are to make and to
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              build upon nice Experiments. </s>
              <s>For though
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              I may ſeem to have uſed ſufficient cauti­
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              on, yet afterward conſidering with my
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              ſelf that the
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              Æolipile
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              I had imploy'd was
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              a very large one, and that it required much
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              more care then one that has not try'd it </s>
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        </body>
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