Boyle, Robert
,
New experiments physico-mechanicall, touching the spring of the air and its effects
,
1660
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nother time, when the Valve had but lit
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tle weight hanging at it, being, by I know
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not what accident, drawn down beneath its
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former place, it was by the impetuous
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current of the outward Air ſuddenly im
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pell'd up into it again, and kept there.
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>But in the former Experiment it is re
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markable, That though the Receiver were
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not well exhauſted, and though it leak'd
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whil'ſt the reſt of the Experiment was in
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proſecution, and though the Valve
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whereon the Cylinder of the Atmoſphere
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could preſs, were not above an Inch and
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a half in Diameter, yet the weight kept
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up by ſuction, or rather ſupported by the
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Air, namely the Valve, the Seal and
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what was caſt into it, being ſent to be
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weigh'd, amounted to about ten of our
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common Pounds, conſiſting of ſixteen
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Ounces apiece: So that we doubted not
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but that, had the Experiment been made
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with favorable Circumſtances, the Air
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endeavoring to preſs in at the Orifice of
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the Stop-cock, would have kept a very
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much greater weight from falling out of
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it; I ſay the Air, becauſe we found, by
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tryal purpoſely made, that neither the
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imperfect contact of the Valve and the
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Stop-cock, nor the Diachylon that was </
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