This vintage text contains a comprehensive treatise on wireless telegraphy and wireless telephony, and contains information on signalling, the principles of wire telephony, electromagnetism, and more. This guide contains a wealth of interesting information, and will be of considerable utility to those with an interest in the development of communications in the twentieth century. The chapters of this text include: 'Waves and Wave-Motion', 'Magnetism and Electricity', 'Electromagnetic Waves Guided Over Conductors', 'Electromagnetic Waves Guided by Single Wires', 'Radiated Electromagnetic Waves Guided by the Ground', etcetera. Many antiquarian books like this are increasingly scarce and expensive, and it is with this in mind that we are republishing this volume now in an affordable, high-quality, modern edition. It comes complete with a specially commissioned biography of the author.