Boyle, Robert
,
New experiments physico-mechanicall, touching the spring of the air and its effects
,
1660
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<
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>But the chief thing we deſign'd to do
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with our Piſtol, was, To obſerve whe
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ther Gun-powder would take Fire in our
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empty'd and cloſely ſtop'd Glaſs? </
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<
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>Whe
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ther the expanſion of the Flame would be
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conſiderably varied by the abſence of ſo
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much of the ambient Air as was drawn
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out of the Receiver? </
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<
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>and whether the
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Flame would diffuſe it ſelf upward, as it is
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wont, notwithſtanding its not having a
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bout it the uſual proportion of Air to
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force it up? </
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<
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>And though moſt of our at
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tempts to fire the Gun-powder in the
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Pan of the Piſtol ſucceeded not, becauſe
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we were fain to let it hang almoſt perpen
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dicular in the Receiver; whereby the
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Powder was ſhaken down before the
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ſparks could reach it: yet once the Ex
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periment ſucceeded, and the kindled
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Powder ſeem'd to make a more expanded
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Flame then it would have done in the
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open Air, but mounted upwards accord
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ing to its wont, whether by reaſon of that
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little portion of Air, which in ſpight of
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our pumping remained in the Receiver, or
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for any other cauſe, we have not now the
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leiſure to conſider. </
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<
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>But we muſt not for
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get, that upon the extinction of the Flame
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the Receiver appear'd darken'd with </
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