Boyle, Robert
,
New experiments physico-mechanicall, touching the spring of the air and its effects
,
1660
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of by curious Men, may be drawn to
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countenance their erroneous Opinion, who
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would fain perſwade us, That Glaſs is
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penetrable by Air properly ſo called.</
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>Our
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Experiment was briefly this: We were
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diſtilling a certain ſubſtance, that much a-
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bounded with ſubtle Spirits and volatile
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Salt, in a ſtrong Earthen-veſſel of an un-
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uſual ſhape, to which was luted a large
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Receiver, made of the courſer ſort of
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Glaſs, (which the Trades-men are wont
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to call Green-glaſs) but in our abſence,
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the Fire, though it were to be very ſtrong,
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was by the negligence or miſtake of thoſe
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we appointed to attend it, ſo exceſſively
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increaſ'd, that when we came back to the
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Fornace we found the Spirituous and Sa-
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line Corpuſcles pour'd out (if I may ſo
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call it) ſo hot, and ſo copiouſly into the
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Receiver, that they made it all opacous,
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and more likely to flie in pieces, then fit
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to be touch'd.</
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ſerve the effects of a Diſtillation, prſe-
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cuted with ſo intenſe and unuſual degree
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of heat, we ventur'd to come near, and
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obſerv'd among other things, that on the
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out-ſide of the Receiver, at a great di-
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ſtance from the juncture, there was ſetled
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a round whitiſh Spot or two, which at</
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