Guides, 279

Gunmetal, 456

India-rubber valves, 254, 255, 439
Indicated thrust, 302, 303

curves of, 302

Gun turning engines, 384

HAND-PUMP, 364
Hanging bridges, 67

Harfield's steering gear, 376
Harmonic motion, 177
Head valves, 246, 252
Heat, nature and effect of, 22
of combustion, 36

evaporation, 28
rejected into condenser, 264
transmitted by jacket, 159
wasted by blowing out, 267
waste of, 38
Heaters, feed water, 392
Heating surface of boilers, 49
High cylindrical boiler, 63

pressure boilers, 63, 65
speed indicators, 337
Hirsch screw, 316

History of water tube boilers, 74
Holden's oil burners, 54
Hollow crank shafts, 271
Holmes and Ingrey's siren, 405
Horizontal engines, 7
Horse-power, 19

calculations, 350

Indications of priming, 435

engines, 407

Regulating valve, 166

Relative volume of steam, 145

Release, instant of, 174

screw turbine, 298

shafting, 282

theoretical efficiency, 291

Propellers, diameter and pitch of, 322

of masted ships, 317

screw, 315

Properties of mild steel, 454

steam, 26, 27

Propulsion, 287

Protection box, 72

Pulsometer, 366

Pulverising liquid fuel, 54

Pumping arrangements, 362, 370

engine, hydraulic, 381

Pumps, feed, 388-391

Purves flue, 69