Boyle, Robert
,
New experiments physico-mechanicall, touching the spring of the air and its effects
,
1660
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>TO proceed now to the
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Phænomena,
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exhibited to us by the Engine above
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deſcribed; I hold it not unfit to begin
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with what does conſtantly and regularly
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offer it ſelf to our obſervation, as depend
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ing upon the Fabrick of the Engine it ſelf,
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and not upon the nature of this or that
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particular Experiment which 'tis employ
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ed to try. </
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Experi
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ment
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1.</
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>Firſt, Then upon the drawing down
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of the Sucker, (the Valve being ſhut) the
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Cylindrical ſpace, deſerted by the Sucker,
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is left de void of Air; and therefore, up
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on the turning of the Key, the Air con
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tained in the Receiver ruſhes into the em
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ptyed Cylinder, till the Air in both thoſe
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Veſſels be brought to about an equal
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meaſure of dilatation. </
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>And therefore,
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upon ſhutting the Receiver by returning
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the Key, if you open the Valve, and force
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up the Sucker again, you will finde, that
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after this firſt exſuction you will drive
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out almoſt a whole Cylinder full of Air:
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But at the following exſuctions, you will
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draw leſs and leſs of Air out of the Recei
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ver into the Cylinder, becauſe that there
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will ſtill remain leſs and leſs Air in the </
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