Boyle, Robert
,
New experiments physico-mechanicall, touching the spring of the air and its effects
,
1660
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then it ſelf, and why that which produc'd
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the bubbles above mention'd ſhould not
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be reſolutely ſaid to be nothing elſe then
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a more active and ſpirituous part of the
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Water, we ſhall, in order to the Elucida
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tion of this matter, ſubjoyn to what
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was formerly deliver'd the following Ex
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>WE recited in our nineteenth Ex
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periment, how by drawing moſt
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of the Air out of the Receiver, we made
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the Water ſubſide by degrees in a Glaſs
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not four Foot long: We ſhall now adde,
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that in the like Experiment made in ſuch
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a Tube, or a greater, it may be obſerv'd,
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That when the Water begins to fall, there
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will appear ſtore of bubbles faſten'd all a
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long to the ſides of the Glaſs; of which
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bubbles, by the agitation of the Veſſel
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conſequent upon pumping, there will ariſe
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good numbers to the top of the Water,
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and there break; and as the Cylinder of
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Water is brought to be lower and lower,
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ſo the bubbles will appear more numerous
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in that part of the Tube which the Water
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yet fills; and the nearer the ſurface of the
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Water, in its deſcent, approaches to theſe </
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