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. </
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>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. </
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>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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>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 </
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