Boyle, Robert
,
New experiments physico-mechanicall, touching the spring of the air and its effects
,
1660
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For if you take a good
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Æolipile,
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with a
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moderately ſtrong and ſlender Neck, and
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filling it with Water, lay it upon quick
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Coals, you may after a while obſerve ſo
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great a preſſure by ſome of the parts con
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tain'd in the
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Æolipile
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upon others, that
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the Water will ſometimes be thrown up
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into the Air above three or four Foot
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high; and if you then take the
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Æolipile
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almoſt red hot from off the Fire, you may
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perceive that the Water will for a longer
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time then one would eaſily imagine con
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tinue to be ſpouted out in a violent
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Stream. </
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>And if there remains but little
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Water in the
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Æolipile
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when tis taken ve
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ry hot from the Fire, immerfing the
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Neck of it into cold Water, you will
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finde, that after it begins to ſuck in ſome
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Water, there will be made from time to
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time ſtore of large bubbles in that Water
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where into the neck was plunged. </
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>Which
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bubbles ſeem manifeſtly to proceed from
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hence, that for a while the heat in the
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Æ
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olipile
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continues ſtrong enough to rarifie
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part of the Water that is ſuck'd in, and
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expel it in the form of Vapors through
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the Water incumbent on the Pipe. </
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>If al
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ſo when the
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Æolipile
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is almoſt full of wa
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ter, and therefore can contain but little </
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