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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
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Chapter V.—ELECTRICAL APPARATUS.
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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
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112
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Chapter VI.—THE ELECTRIC TELEGRAPH.
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Needle instruments—Influence of current on the magnetic needle—Method of reversing the current—Sounding instruments—Telegraphic relays—Recording telegraphs—High-speed telegraphy
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127
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Chapter VII.—WIRELESS TELEGRAPHY.
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The transmitting apparatus—The receiving apparatus—Syntonic transmission—The advance of wireless telegraphy
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137
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Chapter VIII.—THE TELEPHONE.
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The Bell telephone—The Edison transmitter—The granular carbon transmitter—General arrangement of a telephone circuit—Double-line circuits—Telephone exchanges—Submarine telephony
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147
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Chapter IX.—DYNAMOS AND ELECTRIC MOTORS.
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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 lamp--Arc lamps--"Series" and "parallel" arrangement of lamps--Current for electric lamps--Electroplating
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159
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Chapter X.—RAILWAY BRAKES.
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The Vacuum Automatic brake—The Westinghouse air-brake
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187
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Chapter XI.—RAILWAY SIGNALLING.
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The block system—Position of signals—Interlocking the signals—Locking gear—Points—Points and signals in combination—Working the block system—Series of signalling operations—Single line signals—The train staff—Train staff and ticket—Electric train staff system—Interlocking—Signalling operations—Power signalling—Pneumatic signalling—Automatic signalling
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200
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Chapter XII.—OPTICS.
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Lenses—The image cast by a convex lens—Focus—Relative position of object and lens—Correction of lenses for colour—Spherical aberration—Distortion of image—The human eye—The use of spectacles—The blind spot
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230
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Chapter XIII.—THE MICROSCOPE, THE TELESCOPE, AND THE MAGIC-LANTERN.
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The simple microscope—Use of the simple microscope in the telescope—The terrestrial telescope—The Galilean telescope—The prismatic telescope—The reflecting telescope—The parabolic mirror—The compound microscope—The magic-lantern—The bioscope—The plane mirror
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253
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Chapter XIV.—SOUND AND MUSICAL INSTRUMENTS.
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Nature of sound—The ear—Musical instruments—The vibration of strings—The sounding-board and the frame of a piano—The strings—The striking mechanism—The quality of a note
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270
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Chapter XV.—WIND INSTRUMENTS.
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Longitudinal vibration—Columns of air—Resonance of columns of air—Length and tone—The open pipe—The overtones of an open pipe—Where overtones are used—The arrangement of the pipes and pedals—Separate sound-boards—Varieties of stops—Tuning pipes and reeds—The bellows—Electric and pneumatic actions—The largest organ in the world—Human reeds
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287
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Chapter XVI.—TALKING-MACHINES.
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The phonograph—The recorder—The reproducer—The gramophone—The making of records—Cylinder records—Gramophone records
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310
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Chapter XVII.—WHY THE WIND BLOWS.
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Why the wind blows—Land and sea breezes—Light air and moisture—The barometer—The column barometer—The wheel barometer—A very simple barometer—The aneroid barometer—Barometers and weather—The diving-bell—The diving-dress—Air-pumps—Pneumatic tyres—The air-gun—The self-closing door-stop—The action of wind on oblique surfaces—The balloon—The flying-machine
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322
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Chapter XVIII.—HYDRAULIC MACHINERY.
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The siphon—The bucket pump—The force-pump—The most marvellous pump—The blood channels—The course of the blood—The hydraulic press—Household water-supply fittings—The ball-cock—The water-meter—Water-supply systems—The household filter—Gas traps—Water engines—The cream separator—The "hydro"
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350
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Chapter XIX.—HEATING AND LIGHTING.
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The hot-water supply—The tank system—The cylinder system—How a lamp works—Gas and gasworks—Automatic stoking—A gas governor—The gas meter—Incandescent gas lighting
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386
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