in a boiler--The enclosed furnace--The
multitubular boiler--Fire-tube boilers--Other types of boilers--Aids
to combustion--Boiler fittings--The safety-valve--The
water-gauge--The steam-gauge--The water supply to a
boiler 13

Chapter II.--THE CONVERSION OF HEAT ENERGY
INTO MECHANICAL MOTION.

Reciprocating engines--Double-cylinder engines--The function of
the fly-wheel--The cylinder--The slide-valve--The eccentric--"Lap"
of the valve: expansion of steam--How the cut-off is
managed--Limit of expansive working--Compound engines--Arrangement
of expansion engines--Compound locomotives--Reversing
gears--"Linking-up"--Piston-valves--Speed governors--Marine-speed
governors--The condenser 44

Chapter III.--THE STEAM TURBINE.

How a turbine works--The De Laval turbine--The Parsons turbine--Description
of the Parsons turbine--The expansive action of
steam in a Parsons turbine--Balancing the thrust--Advantages
of the marine turbine 74

Chapter IV.--THE INTERNAL-COMBUSTION ENGINE.

The meaning of the term--Action of the internal-combustion engine--The
motor car--The starting-handle--The engine--The carburetter--Ignition
of the charge--Advancing the spark--Governing
the engine--The clutch--The gear-box--The compensating
gear--The silencer--The brakes--Speed of cars 87

Chapter V.--ELECTRICAL APPARATUS.

What is electricity?--Forms of electricity--Magnetism--The permanent
magnet--Lines of force--Electro-magnets--The electric
bell--The induction coil--The condenser--Transformation of
current--Uses of the induction coil 112

Chapter VI.--THE ELECTRIC TELEGRAPH.

Needle instruments--Influence of current on the magnetic needle--Method
of reversing the current--Sounding instruments--Telegraphic
relays--Recording telegraphs--High-speed telegraphy 127

Chapter VII.--WIRELESS TELEGRAPHY.

The transmitting apparatus--The receiving apparatus--Syntonic
transmission--The advance of wireless telegraphy 137

Chapter VIII.--THE TELEPHONE.

The Bell telephone--The Edison transmitter--The granular carbon
transmitter--General arrangement of a telephone circuit--Double-line
circuits--Telephone exchanges--Submarine telephony 147

Chapter IX.--DYNAMOS AND ELECTRIC MOTORS.

A simple dynamo--Continuous-current dynamos--Multipolar
dynamos--Exciting the field magnets--Alternating current dynamos--The
transmission of power--The electric motor--Electric lighting--The
incandescent la