Boyle, Robert
,
New experiments physico-mechanicall, touching the spring of the air and its effects
,
1660
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the Incumbent Mercury. </
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>Whence I in
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ferr'd (as eaſily I might) that, if the Ex
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periment could be try'd in our Engine, the
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Quick-ſilver would ſubſide below 27 Di
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gits, in proportion to the exſuction of
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Air, that ſhould be made out of the Re
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ceiver. </
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<
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>For, as when the Air is ſhut in
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to the Receiver, it does (according to
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what hath above been taught) continue
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there as ſtrongly compreſſ'd, as it did
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whil'ſt all the incumbent Cylinder of the
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Atmoſphere lean'd immediatly upon it;
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becauſe the Glaſs, wherein it is pent up,
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hinders it to deliver it ſelf, by an expanſi
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on of its parts, from the preſſure where
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with it was ſhut up. </
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<
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>So, if we could per
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fectly draw the Air out of the Receiver,
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it would conduce as well to our purpoſe,
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as if we were allow'd to try the Experi
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ment beyond the Atmoſphere. </
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Experi
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ment
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17.</
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>Wherefore (after having ſurmounted
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ſome little difficulties which occurr'd at
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the beginning) the Experiment was made
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after this manner. </
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>We took a ſlender and
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very curiouſly blown Cylinder of Glaſs,
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of near three Foot in length, and whoſe
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bore had in Diameter a quarter of an Inch,
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wanting a hairs breadth: This Pipe being
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Hermetically ſeal'd at one end, was, at </
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