88

Hydraulics.

with Spouts a , i, c, d, e, &c. round the Sides fix’dto it, and the Bottom thereof rests on a Center-Pin O-In this Machine is fix’d an upright Tube G, withHoles at the Bottom, and a Funnel P on the Top toreceive a Spout of Water from a Conduct-Pipe Q__, bythe Stop-Cock R.

2. 1 his Veslel being compleated, two or more ofthem are placed in a reverberator^ Arch for conveyingthe intense Pleat of a strong Fire, the Flame whereofencompasies the Iron Vessels, and keep them in a redHeat, during the Time of their Use; at which Tim?the Cog-Wheel I, being turn’d by proper Machinery,whirls the Difperfer about with great Velocity, andcauses the Water in it (by a centrifugal Force) to flythro’ the Spouts against the Sides of the red-hot Pots.which immediately converts the greatest Part thereofinto Vapour or elastic Steam, which is conveyed by acommon Pipe or Cock to the Barrel of the Engine toput the Piston in Motion ; and thewaste Water is con-veyed away at Bottom, by means of a Pipe C D, witha Valve at D to keep out the Air.

3. By many Experiments made on this Engine, MPPayne has proved the following Particulars, viz. Tba£such an ignisied Pot or Veslel will rarify or expand 5 aGallons of Water, Wine Measure, per Hour.

4. That a Cubic Inch of Water will make in Prac-tice 4000 Inches of Steam ; and therefore 50 Gallon 5will produce 46000000 per Hour, or 770000 per Rd 1 'nute; hence two such Pots will produce 1540000 cu-bic Inches of elastic Steam per Minute.

5. That by an Experiment made at a Fire-Engine40 Gallons of Water per Flour, made into elastic Steam?will effectually give Motion to a 24 Inch Cylinder E* 1 'gine.

6. That ut. Ib. of Coals is sufficient, in this Me-thod, to rarify 90 Gallons of Water per Hour in^Steam, whereas. in the common Fire-Engine, M" 1Boilers, ’tis ulual to expend three times as g reat 21Quantity.

7. That 95 Gallons of Water expanded into Steamwill work a 36 Inch Cylinder Engine ; from all whin"