Heights to which Water may be Projected through Engine Pipes under Pressure.

Pressure Inch.

Equivalent

Head of Water.

Height of Jet.

Ratio of Compression of Air in Air. chamber.

Lbs.

Feet.

Feet.

30

68

33

•5

45

102

66

•33

60

136

99

•25

76

170

132

•2

Pressure per Sq. Inch.

Equivalent

Head of Water.

Height of Jet.

Ratio of Compression of Air in Air-chamber.

Lbs.

Feet.

Feet.

90

204

165

•17

105

238

198

•14

120

272

231

•125

150

340

297

•1

Power required to raise Water from Wells by a Double-acting Lifting Pump.

Diameter of

Pump.

Volume

Hour.

Depth from which this Volume can be raised by each Unit of Power.

Man turning a Crank.

Donkey working a Gin.

Horse working a Gin.

One Horse-power Engine.

Inches.

Gallons.

Feet.

Feet.

Feet.

Feet.

2

265

80

160

660

880

2½

420

60

100

350

550

8

820

85

70

245

385

3½

830

25

50

175

275

4

1060

20

40

140

220