The Electron explains how they produce the electric current. How man discovered means of making the electrons march. A simple explanation of how a complete electric circuit is always necessary. How an "earth circuit" works. How the marching electrons can do work 68 CHAPTER VIII A USEFUL DANCE A perpetual dance. A responsible position. How the safety of the mariner depends upon the electrons' dance. How electrons produce a magnet. A convenient kind of magnet, which gains and loses its attractive power when desired. How a permanent magnet is made. The great service of electrons in modern life 76 CHAPTER IX HOW WE CARRY MAN'S NEWS The method of sending the news. The Electron's personal experience. A series of forced marches. How man controls the electrons. How the electrons reproduce the signals 86 CHAPTER X HOW WE COMMUNICATE WITH DISTANT SHIPS An entirely different means of communication. A surprise to man, but not to the electrons. How the electrons produce waves in the surrounding æther. How these waves disturb distant electrons. The Electron's personal experience. Its description of its actions in a wireless telegraph station 94 CHAPTER XI HOW WE REPRODUCE SPEECH Why it is not correct to speak of the electrons as carriers of speech. The action of electrons in the working of telephones. The Electron's own experience in wireless telephony 106 CHAPTER XII OUR HEAVIEST DUTIES A roving commission. How electrons can move gigantic cars and trains. The action of electrons in dynamos and motors. How the electrons transmit the energy. What makes the motor go 116 CHAPTER XIII A BOON TO MAN A simple explanation of how the electrons produce light. How the Electron provides a connecting link between matter and the æther. How light reaches the earth from the sun. How the electrons produce that beautiful luminous effect which man calls an "Aurora." How the earth has become a negatively charged body. How electrons produce radiant heat. The difference between light and heat 126 CHAPTER XIV HOW WE PRODUCE COLOUR What colour is really. How the different colour sensations are stimulated by the electrons. The Electron as a faithful satellite to the atom. How electrons can produce the different æther waves. How the electrons respond to the different waves. The production of artificial light. Co-operation of the electrons. Man's ridiculously wasteful processes. The electrons' secret 136 CHAPTER XV WE SEND MESSAGES FROM THE STARS