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

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              nothing but the ordinary preſſure of the
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              contiguous Air. </s>
              <s>I know not whether it
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              be requiſite to take notice, that this Ex­
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              periment was made indeed in a moiſt
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              Night, but in a Room, in whoſe Chim­
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              ney there was burning a good Fire, which
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              did perhaps ſomewhat rarifie the Air of
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              which the bubble conſiſted. </s>
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              <s>It has ſeem'd almoſt incredible which is
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              related by the Induſtrious
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              Merſennus,
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              That
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              the Air by the violence of heat, though
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              as great as our Veſſels can ſupport with­
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              out fuſion, can be ſo dilated as to take up
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              ſeventy times as much room as before:
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              Wherefore becauſe we were willing to
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              have a confirmation of ſo ſtrange a
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              Phæno­
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              menon;
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              we once more convey'd into the
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              Tube a bubble of the bigneſs of the for­
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              mer, and proſecuting the Experiment as
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              before with the ſame Water, we obſerved
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              that the Air did manifeſtly ſtretch it ſelf
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              ſo far, as to appear ſeveral times a good
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              way below the ſurface of the Water in the
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              Viol, and that too with a ſurface very
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              convex toward the bottom of the Pipe.
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              <s>Nay, the Pump being ply'd a little lon­
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              ger, the Air did manifeſtly reach to that
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              place where the bottom of the Tube
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              lean'd upon the bottom of the Viol, and </s>
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