TELEGRAPHY FOR BEGINNERS. The Standard Method. An authoritative book of instruction in the methods and forms most approved, with a series of lessons. By Willis H. Jones. With the Morse alphabet and the Continental code. 64 pages, 19 illustrations, paper binding, 25c.; cloth binding, 50c.
INDUCTION COILS. How to Make and Use Them. By P. Marshall. A practical handbook on the construction and use of sparking coils for wireless telegraphy. With tables of windings for coils giving 1/4 in. spark up to 12 in. sparks. With full description for the construction of mercury interrupters. 76 pages, 35 illustrations. Price, 25c.; cloth binding, 50c.
Full descriptive circular of The Model Library Series of practical Handbooks FREE.
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