Letters of a Radio-Engineer to His Son

A series of instructive letters explains principles and practical components of early radio for an intelligent beginner. Topics include basic electricity and conduction, primary and storage batteries, electron emission and the audion tube, measurement and electron-moving forces, condensers and coils, tuning and detectors, amplification including regenerative circuits, receivers and transmitters, and the transmission of the human voice. Practical guidance on building, experimenting with, and operating sets is combined with clear explanations of how individual components and circuits function.