Page:Philosophical Transactions - Volume 037.djvu/16

 The Ladles or Paddles 14 Foot long, 18 Inches deep, --

= 22,4 square Feet.

The Fall of Water is sometimes

2 Feet.

44,8

6 Gall. in a Cub. ft.

)268,8

10, lb a Gallon.

112)2688.(24 Hundred.

The Velocity of the Water, 4 Feet in 21″′ of Time.

21″′ — 4 Ft. :: — 60″: = 685 Feet per Minute.

The Velocity of the Wheel = 310 Feet per Minute.

Quantity expended on the Wheel, according to the Velocity of the Stream 1433 Hogsheads per Second.

But at the Velocity of the Wheel 645 Hogsheads per Second.

The Velocity of the Wheel to the Velocity of the Water, as 1 to 22.

Although they may justly be esteemed as good as any in Europe, yet are there, as I conceive, some Things which might be altered very much for the better.

First, If instead of sixteen Forcers they worked only eight, the Stroke might be five Feet in each Forcer, which would draw a great deal more Water with the same Power on the Wheel; for then there would be but half the opening and shutting of Valves, consequently but half that Loss: And a five Foot Stroke draws above double the Quantity of two Strokes of 2½ each, by near ⅓, in regard the Velocity is