Boyle, Robert
,
New experiments physico-mechanicall, touching the spring of the air and its effects
,
1660
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firſt we thought might be ſome ſtain up
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on the Glaſs; but after, finding it to
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be in divers Qualities like the Oyl,
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and Salt of the Concrete we were Di
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ſtilling, we began to ſuſpect that the
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moſt ſubtle and fugitive parts of the im
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petuouſly aſcending Steams, had pene
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trated the ſubſtance (as they ſpeak) of
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the Glaſs, and by the cold of the am
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bient Air were condenſ'd on the ſur
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face of it. </
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>And though we were ve
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ry backward to credit this ſuſpition, and
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therefore call'd in an Ingenious Perſon
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or two, both to aſſiſt us in the Ob
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ſervation, and have Witneſs of its e
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vent, we continued a while longer to
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watch the eſcape of ſuch unctuous Fumes,
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and upon the whole matter unanimouſly
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concluded, That all things conſider'd,
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the ſubtle parts of the diſtill'd matter
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being violently agitated, by the exceſ
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ſive heat had paſſ'd through the Pores
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of the Glaſs, widen'd by the ſame heat.
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>But this having never happen'd but
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once in any of the Diſtillations we have
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either made or ſeen, though theſe be
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not a few, it is much more reaſonable
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to ſuppoſe, that the perviouſneſs of
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our Receiver to a Body much more </
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