Introduction to Electricity and Radio

240pp, with 193 illustrations, charts and diagrams etc. In green cloth-covered boards with gilt titles (boards are worn all over, rubbed at edges, scuffed at corners and spine ends). Internally general neat and clean barring some pencil drawings on rear endpapers; front and rear endpapers cracked; and the last few pages have a flat crease. A little soft. A general introduction to electricity and its use in radio transmission, with sections covering topics such as Generation of Currents, Sound and Speech, Alternating Currents, Modulation, Oscillations, Detector and Detector Circuits, Low Frequency Amplification etc.