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CONTENTS»

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Piston for Horizontal Marine Engines—Mr. Howden on Packing and Friction—

Mr. Rowan’s form of Piston—Piston Rod—Crosshead and Guides—Con-necting Rod—Cranked Shaft—Built Crank Shaft —Main Framing—Condenserand Air Pumps , ... ... ... ... ... ... ... ... ... 399

Arrangements for Direct-acting Single Piston-rod and Double Trunk Engines,... 423

Surface System of Condensation—Construction and Arrangement of Surface Con-densers—Making and Fitting of the Tubes—Arrangement of the RefrigeratingSurface—Pumps—Valves, ... ... ... ... ... ... ... 424

Hand Gear—Lubricators—Turning Gear, .. ... ... ... ... ... 450

Boiler Fittings—Valves—Steam Pipes—Separator—Lagging—Gauge Glass—Scum Taps—Steam Whistles, .454

Safety-valve Openings—Experiments and Formulse—Loading of Safety Valvesby Direct Springs—Conclusions of Investigation Committee on Safety Valves, 462The Screw Propeller :

Shafting for the Propeller —Repairing Couplings—Pillow Blocks—Stern Tube—Hollow Propeller Steel Shafts, ... ... ... ... ... ... ... 471

Construction and Forms of the Propeller —Number and Configuration of theBlades—Plan for lowering the Propeller below the Keel, ... ... ... 477

Raising the Screw Propeller and Shaft, ... ... ... ... ... ... 488

The Compound Engine :

General Adoption of the Compound Arrangement—Professor Rankine’s Defin-ition of a Compound Engine, ... ... ... ... ... ... ... 491

Arrangement of Cylinders, ... ... ... ... ... ... ... ... 494

Engines of the Barisian, &c., ... ... ... ... ... ... ... ... 496

Engines of the Screw Steamer Itata,... ... ... ... ... ... ... 498.

Details of the Machinery of the Servia, Itata, and Sir Bevis, ... ... ... 500

Engines of the Arizona > ... ... ... ... ... ... ... ... 505

Governors for Marine Engines—Dunlop’s Pneumatic Governor, ... ... ... 505

Three-cylinder Compound Steeple Engine for the Paddle Wheel, ... ... 506

Table of Average Consumption of Coal, per indicated Horse-power per hour, byCompound Engines on long Sea Voyages, ... ... ... ... ... 508

Rules for the Horizontal Direct-action Marine Engine, &c. NominalHorse-power—Proportion of Power to Tonnage—Rule for Tonnage—Per-formance of Screw Vessels—Diameter of Cylinder—Stroke of Piston—Valves■—Eccentrics and Link Motion—Connecting Rod—Main Cranked Shaft—Crosshead and Guides —Main Frame—Piston—Air Pump and Condenser—Surface Condensation—Feed Pump—Screw Propeller—Proportions of Grif-fith ! s Screw Propeller —Screw Aperture and Shafting—Hand and TurningGear —Safety Valve and Waste-steam Pipe—Copper Steam Pipes—Numberand Diameter of Kingston Valves and Blow-off and Injection Cocks—Flangesfor Copper Pipes, ... ... ... ... ... ... ... ... ... 510

LOCOMOTIVE ENGINES.

Combustion in the Locomotive . The Steam Blast—Its Mechanical Action—Steam Jets—Arrangement of the Fire Box—Utilization of Smoke and Gases, 531The British Locomotive:

Construction of the Boiler and Boiler Mountings —Fire Box—Stays—Dampers, 547

Shell of the Boiler—Steam Chest and Dome—Tubes—Smoke Box—Chimney —

Ash Pan—Fire Bars—Steam Pipes—Blast Pipe, ... ... ... ... 554