Boyle, Robert
,
New experiments physico-mechanicall, touching the spring of the air and its effects
,
1660
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Pipes and
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Siphons
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formerly mention'd,
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but will return to our Bubble; and take
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notice, That we thought fit alſo to en
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deavor to meaſure the capacity of the
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Bubble we had made uſe of, by filling
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it with Water, that we might the better
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know how much Water anſwered in
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weight to 3/4 of a Grain of Air, but not
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withſtanding all the diligence that was
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uſed to preſerve ſo brittle a Veſſel, it
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broke before we could perfect what we
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were about, and we were not then pro
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vided of another Bubble fit for our
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turn. </
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>The haſte I was in, My Lord, when I
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ſent away the laſt Sheet, made me forget
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to take notice to you of a Problem that
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occurr'd to my thoughts, upon the oc
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caſion of the ſlow breaking of the Glaſs
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Bubble in our evacuated Receiver. </
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>For
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it may ſeem ſtrange, ſince by our ſixth
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Experiment it appears, that the Air, when
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permitted, will by its own internal Spring
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expand it ſelfe twice as much as
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Mer
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ſennus
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was able to expand it, by the
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heat even of a candent
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Æolipile:
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Yet
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the
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Elater
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of the Air was ſcarce able to
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break a very thin Glaſs Bubble, and ut-</
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