Principes Élémentaires de Télégraphie sans Fil.
Par R. D. Bangay. (Great Britain, 9s.; Postage 6d.)
Magnetism and Electricity for Home Study.
By H. E. Penrose. Crown 8vo. Over 500 pages. Price 5s. net, (Postage 6d.) Contains fifty complete lessons.
The Calculation and Measurement of Inductance and Capacity.
By W. H. Nottage, B.Sc. Invaluable to all engaged in Telegraph Engineering. Indispensable to the Wireless Engineer, Student and Experimenter. Price 3s. 6d. net. (Postage 5d.)
A Short Course in Elementary Mathematics and their application to Wireless Telegraphy.
By S. J. Willis. To Students in Wireless Telegraphy, as well as those engaged in the practical application of this Science, this book should prove of real value. Price 3s. 6d. net. (Postage 6d.)
The Marconi Official Gramophone Records.
For self-tuition in receiving Morse Signals. Price 4s. each, double-sided. (Postage 9d.) Set of Six Records, 24s. post free.