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Now it is plain, that the Rock. C C, being filled partly xvith Water, paroly wich Air; is we opea the Bellows MM, the Air from the Crown FF,must run through the Pipe N N, into the Tumbler A A : and thence throughthe Pipe ILL, into MM to fili the Vacuity made thcrein: the Air in theCrown F F, being thus Rarified, gives liberty to the Air in the Rodi C C, toRarifie too, by Driving the Water through the Pipe OO. The Water be-ing got up into the Crown FF, runs down the Cor all E E, and through theGrooked Pipes D D, D D, Spouts out at thfcir upper Apertares, and from theShells HH, falis upon the Rodi CC : is we come asterwards to shut the Behlows M M, the Air got into their Vacuity, must run back into the Tum-bler A A, and preis upon the Water at the top os the Reck. C C: but the Airin the find l{odl having been Rarified, its Spring is not sufficient to Resist thisPressure, and sb the Water is forced into the said Rock. through the Pipe P P:and by thus opening and fhutting. the Bellows M Mi the Water mutt con-stantly circulate by the ways aforeseid.

As for the Ufes this way for. Raifmg Water may be applied to, this I do 7 '*"’conceive: the Glastes, being meerly to conceal the Secret, must be lest out • 1 J

and there may be made several Receptacles above one another to receive theRaised Water, sb as doth the Crown F F: and there should be as manyBellows to Communicate every one with one Reccptacle thele Bellows shouldbe moved by an Axis, so that when the Firfl is open, the Second should beshut ; the Third 'open, the Fourtb shut; and fio forth, alternativcly ; whichmay be easily done: By this means, the First or Lowest Reccptacle wouldgive the necestary Supply of Water to the Second, the Second to the TseVrf*.and the Third to the Fourtb, (jc. till the Water would be Raised to the intendeed Height; such Receptacles might easily be set i z or 15 Foot above oneanother, and so but sew of them might Raise Water to a confiderable Height,as well as ordinary Pumps do; but this New Way would have this advan-tage, that in the Ordinary Pumps the strength to be applied lieth near theWater to be Raised, but by this Contrivance the Stream of a River may beapplied to draw Water out of a Mine far Distant from it . By the fame waythe Stream of the T hames might keep constant Watcr-Works in Windfor-Casile,as easie almost as in the Lowest Fields: The River Seine might do the fameat St. Gertnain, and perhaps at Versailles too, notwithstanding the great Di-»ftance. For it is to be observed, That the Pipes of Communication bertween the Bellows and Engine, being meerly for the Conveying of the Air,which moves very swiftly, they may be slender enough, and lo contain buta small Quantity of Air to be Rarified; and besides, they will not be subjectto Burst or Leak, since the Pressure they bear, being ali external to the Pipe,will rather strengthen than break the fame. From whence it sollows, Thatthe seid Pipes need not be strong, but may be made at very small Charges.

It is also to be observed, That those Bellows which are open, have the Airia them very much Rarified, so that the outward Air lieth heavy upon stoshut) them, by which means the Motion of the Engine must be helpt in List-ing up the opposite Bellows, that are to be opened : And this Observation may

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