Boyle, Robert
,
New experiments physico-mechanicall, touching the spring of the air and its effects
,
1660
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of the Cylinder, the hole of the Stop
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cock and that in the Cover of the Re
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ceiver, that ſome Air might get in to
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cheriſh the Flame and the ſmoke might
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have a vent; Yet for ſo great a Flame
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the Air ſufficed not ſo much as till the
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Cover could be perfectly luted on: So
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that before we were quite ready to imploy
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the Pump, the Candle was extinguiſhed.
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>Wherefore we took but one of the a
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bove mention'd Tapers, and having
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lighted it, cloſ'd it up in the Receiver, to
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try how long a ſmall Flame with a pro
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portionable ſmoke would continue in
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ſuch a quantity of Air: But we found
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upon two ſeveral tryals, that from the
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beginning of pumping, the Flame went
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out in about a minute of an hour. </
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>It
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appear'd indeed to us that the ſwinging
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of the Wier to and fro (in the Engine
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ſhaken by pumping) haſten'd the vaniſh
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ing of the Flame, which ſeem'd by that
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motion to be caſt ſometimes on one ſide
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of the Week and ſometimes on the o
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ther; But though once we purpoſely
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refrain'd pumping after a very few ex
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ſuctions of the Air, that the Flame might
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not be agitated, yet it laſted not much
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longer then the newly mention'd time. </
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