Boyle, Robert
,
New experiments physico-mechanicall, touching the spring of the air and its effects
,
1660
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pear'd to be a Cylinder of 5/6 parts of an
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Inch in length; but when the Pipe was
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taken out and turn'd upſide down, it ap
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pear'd at the other end inferior in bulk to a
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Pea. </
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>Theſe things being thus done we took
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(to make the Experiment the more ex
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actly) a ſmall pair of Scales, ſuch as Gold
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Smiths uſe to weigh Gold Coyn in; and
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weighing the Tube and Water in it, we
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found them to amount to one Ounce thir
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ty Grains and an half: Then we pour'd in
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as much Water as ſerv'd to fill up the
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Tube, wherein before we had left as much
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ſpace unfill'd up as was poſſeſſ'd by the
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bubble; and weighing again the Pipe and
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Water, we found the weight increaſ'd
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onely by one Grain. </
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>Laſtly, pouring out
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the Water, and carefully freeing the Pipe
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from it (which yet we could not perfectly
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doe) we weighed the Glaſs alone, and
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found it to want two Drachmes and thirty
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two Grains of its former weight: So
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that the bubble of Air taking up the room
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but of one Grain in weight of Water, it
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appear'd that the Air by its own
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was ſo rarified, as to take up one hundred
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fifty two times as much room as it did be
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fore: though it were then compreſſ'd by </
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