Boyle, Robert
,
New experiments physico-mechanicall, touching the spring of the air and its effects
,
1660
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[Figure 10]
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in the Tube fell down lower, about three
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inches, at the top of the Mountain then
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at the bottom. </
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>And a Learned Man a
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while ſince inform'd me, That a great
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Virtuoſo,
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friend to us both, has, with not
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unlike ſucceſs, tryed the ſame Experi
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ment in the lower and upper parts of a
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Mountain in the Weſt of
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England:
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Of
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which, the reaſon ſeems manifeſtly enough
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to be this, That upon the tops of high
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Mountains, the Air which bears againſt
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the reſtagnant Quick-ſilver, is leſs preſſ'd
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by the leſs ponderous incumbent Air; and
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conſequently is not able totally to hinder
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the deſcent of ſo tall and heavy a Cylin
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der of Quick-ſilver, as at the bottom of
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ſuch Mountains did but maintain an
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Æqui
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librium
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with the incumbent Atmoſphere. </
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>And if it be yet further Objected a
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gainſt what hath been propoſ'd touching
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the compactneſs and preſſure of the Infe
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rior Air; That we finde this very Air to
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yield readily to the motion of little Flies,
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and even to that of Feathers, and ſuch o
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ther light and weak Bodies; which ſeems
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to argue, that the particles of our Air are
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not ſo compreſſ'd as we have repreſented
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them, eſpecially, ſince by our former
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Experiment it appears, that the Air rea-</
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