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CONTENTS.

Page

Regulation of Steam by the Slide Valve, as applied to Land, Locomotive ,and Marine Engines:

Form of older Valve without Lap—Valve with Lap—Proportioning the SlideValve—Lead—Back Pressure—Position of the Valve—Means of impartingReciprocating Motion—The Eccentric and Cam Arrangements—Link Motionapplied to the Land and to the Locomotive Engine —Slide Valves for various

forms of Engine—Starting Gear—Expansion Valve and Gear, . 94

Geometry of the Steam Engine —Connecting Rod and Crank— Crank and Eccen-tric Paths—Crank and Eccentric Paths delineated as regards the Cover, Lead,and Cut-ofF—Double Eccentrics and Link Motion—Lap of the Valve variesas the Cut-ofF and Length of Connecting Rod—Opening of Port by Valve

—Setting out the Valve Faces,.117

Relieving the Cylinder from Internal Pressure—Relieving the Slide Valve fromBack Pressure, ... ... ... ... ... ... ••• ••• 126

The Indicator Diagram. M'Naught’s Indicator—Diagram from EccentricValve Motion—Diagram from Corliss’ Valve Gear—Examples of CompoundEngine Diagrams—Theoretical Diagram—Mechanism for actuating the Roller

of Indicator, . . 130

The Expansion of Steam:

Tables of Hyperbolic Logarithms, ... ... ... ... ... ... ... 141

Properties of Steam and otlier Gases—Constituent Heat of Saturated Steam—Relations of Pressure, Volume, Temperature, and Weight—Motion of Steam—Velocities of Saturated Steam—Differences of Pressure in the Boiler and

Cylinder—Friction of a Fluid through a Pipe,.143

Table of Properties of Saturated Steam at different Pressures, ... ... ... 147

STATIONARY ENGINES.

Pumping Engines for Mines:

Details of the Cornish Engine—Details of the Pumping Gear—Valve Gear—The

Cataract—Condenser and Air Pump —The Ejector Condenser, ... ... 150

Horizontal, Overhead-beam, Side-lever, and Direct-acting Pumping Engine, ... 180

Pumping Gear for Direct-acting Engine—Examples of Pit Work, ... ... 192

Direct-action Compound Pumping Engine,.198

Pumping Engines for Water Works:

Single-acting Engine with Stand-pipe Tower—Engines at Wolverhampton WaterWorks—Valve Regulator a substitute for Stand Pipe—Arrangement of thePump Valves—Gutta-percha Ball Valves on Metal Seatings—Berwick-on-Tweed Water Works—Arrangement of Tanks, Engine and Boiler Houses—

Cost of raising Water, ... ... ... ... ... ... ... ... 202

Stand Pipes and Towers—Air Vessels—Stop, Relief, and Pressure Valves, ... 221Pumping Engines for Drainage Works and General Purposes:

The London Drainage System—Pumping Engines at Abbey Mills, Deptford ,and Crossness—Arrangement of the Pumps—Discharge of the Sewage into

Reservoir—Construction of the Pumping Station at Crossness, ... ... 226

Higli-pressure Geared Pumping Engines for emptying Docks , &c., ... ... 235

The Centrifugal Pump—Gwynne & Co.’s Machinery—The Pulsometer, ... 236

Winding Engines. Details of Construction, ... ... ... ... ... 239

Blowing Engines :

Overhead-beam Blowing Engine—Details of Construction—Examples of BlowingEngines erected at Dowlais Iron Works, ... ... ... ... ... 250