Boyle, Robert
,
New experiments physico-mechanicall, touching the spring of the air and its effects
,
1660
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a Reaſon of the leſs difficult part of the
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Problem: And though Your Lord
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ſhip ſhould ev'n preſs us to declare what
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Conjecture it was, that the above-recited
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Circumſtances ſuggeſted to us, we ſhould
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propoſe the thoughts we then had, no o
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therwiſe then as bare Conjectures. </
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<
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>In caſe then our
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Phænomenon
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had con
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ſtantly and uniformly appear'd, we ſhould
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have ſuſpected it to have been produc'd
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after ſome ſuch manner as follows. </
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>Firſt, we obſerv'd that, though that
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which we ſaw in our Receiver ſeem'd to
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be ſome kinde of Light, yet it was indeed
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but a whiteneſs which did (as hath alrea
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dy been noted) opacate (as ſome ſpeak)
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the inſide of the Glaſs. </
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>Next we conſider'd, that our com
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mon Air abounds with Particles or little
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Bodies, capable to reflect the Beams of
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Light. </
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>Of this we might eaſily give di
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vers proofs, but we ſhall name but two:
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The one, that vulgar obſervation of the
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Motes that appear in Multitudes ſwim
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ming up and down in the Air, when the
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Sun-beams ſhooting into a Room, or any
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other ſhady Place diſcover them, though
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otherwiſe the eye cannot diſtinguiſh them </
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