Boyle, Robert
,
New experiments physico-mechanicall, touching the spring of the air and its effects
,
1660
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or cold. </
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>And ſince alſo that according to
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the bare denſity or rarity of the Air in
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cumbent on the ſubjacent Quick-ſilver in
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the Veſſel, that in the Tube was impell'd
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more or leſs high; ſuch changes happen
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ing in the neighboring part of the out
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ward Air, either by the aſcenſion of groſs
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or copious exhalations, or by any other
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cauſe (of which there may be divers) as
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were capable to make conſiderable altera
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tions in the conſiſtence of the Air, as to
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rarity and denſity,
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may
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be able propor
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tionably to alter the heighth of the
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Quick-ſilver: I rather ſay, that ſuch alte
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rations
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may
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be, then that they
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are
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the
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cauſes of our
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Phænomenon,
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becauſe I think
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it ſufficient, if I have propoſ'd conje
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ctures not altogether irrational about a
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new Myſtery of Nature, touching which,
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the chief thing I pretend to, is to give oc
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caſion to the Curious to inquire further
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into it then I have been yet able to do. </
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<
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>THe ſame Reaſon that mov'd us to
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conclude, that by the drawing of the
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Air out of the Receiver, the Mercury
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would deſcend in a Tube ſhorter then ſix
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and twenty digits, induc'd us alſo to ex-</
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