Boyle, Robert
,
New experiments physico-mechanicall, touching the spring of the air and its effects
,
1660
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the Scheme, into whoſe intervals are to
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be fitted, the teeth of a ſmall Iron nut;
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(
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) (as Tradeſ-men call it) which is faſt
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ned by two ſtaples (22) to the under ſide
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of the formerly mention'd tranſverſe
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board (222) on which the Cylindre reſts,
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and is turn'd to and fro by the third piece
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of this Pump, namely, the handle or
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manubrium,
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(7) of which the Figure gives
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>The fourth and laſt part of this Cylin
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dre, is the Valve, (R) conſiſting of a
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hole bored through at the top of the Cy
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lindre, a little tapering towards the cavi
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ty; into which hole is ground a tapering
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Peg of braſs, to be thruſt in, and taken
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out at pleaſure. </
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>The Engine being thus deſcrib'd, it
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will be requiſite to adde, that ſomething
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is wont to be done before it be ſet on
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work, for the more eaſie moving of the
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Sucker, and for the better excluſion of
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the outward Air: which when the Veſſel
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begins to be exhauſted, is much more dif
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ficult to be kept out then one would eaſi
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ly imagine. </
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>There muſt then be firſt powr'd in at
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the top of the Receiver a little ſallad oyl,
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partly to fill up any ſmall intervalls that </
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