( 6 P )

this Engine, this Is not so much as it seems at First:; because the Pressure be-ing ali from without, there is no need of any great strength to resist it, andso the Metal for the Pump will Cost but little : There may also be found Oc-casions where to make so good use of them, that soch an Engine as I haveDescribed would in a Years time fave Labour enough to pay for many Pumps,Unce it might every hour Raise about i 800 Pounds of Water to the heightof 60 Foot: Mean while I don’t pretend to have given here the best Pro-portion for the Ligneis of every part of the Engine ; but it may be, by Al-tering the Capacity of the Pumps, of the Pipes, or of the Rjcep meles, a muchmore confiderable Effect might be Produced.

3. The Water doth not at any time Ascend higher than from a Lower I{e-ceptacle into the next Upper Pjceptnclc ; which Height is but ix Foot : sothat is is plain enough, that the Pressure of the Air may be sufficient to Driveit up. It is Indifferent, whether it be by Rarefaction or otherwise that theWater comes into the Reccptnclc A ; it is enough that the Water is there, andthat the Air Preffes upon it with such a Strength as will prcvail against alithat opposeth it.

4. Though the Use of the Pipes be meerly for Conveying of Air : Theymay nevertheless be cafily fill’d with Water when need Requires, and so theDefects in them may as well be found out as in the Pipes that are used for theConveying of Water.

<Ah Engine for £11. A, Th e Furnncc.

Raifing U'ater, D, 1 ne Bojlcr.

by the Help of q Q Two Cochj, which convey the St eam by turns to the Vejscls D D.

Tho. Savery. D D, The Ve,Iseis which receive the Water from the Lottom, in order te

11.253. t- 228. Difcharge it again at the Top.

• F «- 20J - E E E E, Veilves.

" F F, Cockj which keep up the Water, while the Vnlves on Occusion areCleans’d.

G, The Force Pipe.

H, The Suckjng Pipe.

I, The

jtn Hyiraulique XIII. This Engine is a ehest of Copper A, pierced with many Holes aboveEngtne ; by B B, and holds with in it the Body of a Pump E F M, whose Sucher D E, isn.128. p. 67'^. Raised and Abased by two Lcvcrs C, O ; These Levers lmving each of themF#. 203. two Arms, and each Arm being fitted to be laid hold on by both Hands cfa Man. Each Lever is pierced in the middle by a Mortaise a a, in whichan Iron Nail, which paffes through the Handle of the Sucher, turns when theSucher is raised or lower’d. Near the Body of the Pump there is a Copper PotIH K, joined to it by the Tube G, and having another Tube KN L, whichin N may be Turned every way.

To make this Engine Play, Water is pour’d upon the ehest to enter in atthe Holes that are in the cover thereof. This Water is drawn into the Body

of