Insert the coin in the hole and paste a piece of paper on both sides of the cardboard to prevent the coin from falling out. COLE & MORGAN Publishers of the Arts and Sciences Series P.O. Box 473 New York, N. Y. *The Boy Electrician* Practical Plans for Electrical Toys and Apparatus, with an Explanation of the Principles of Everyday Electricity. *By ALFRED P. MORGAN.* Author of "Wireless Telegraph Construction for Amateurs" and "Wireless Telegraphy and Telephony," etc. *With full-page Illustrations and 324 Working Drawings and Diagrams* *by the author. 8vo., Cloth, Net Price, $2.00.* This is the age of electricity. The most fascinating of all books for a boy must therefore be one dealing with the mystery of this ancient force and modern wonder, even a mere list of whose services is impossible. The best qualified of experts to instruct boys, Alfred P. Morgan, has in a book far superior to any other of its kind told not only how to make all kinds of motors, telegraphs, telephones, batteries, etc., and to do so economically, but has explained the principles upon which these depend for operation, and how the same thing is done in the every-day world be well presented and so attractive is this really great book that it will be an education for any bright boy to have it, as well as the best kind of a moral safeguard, by leaving no time or thought for evil, and a means of future benefit beyond the power of any one to reckon. Glancing over the pages of this book, one cannot but be impressed by the excellent illustrations, clearness of expression and the large number of subjects that are covered. It is beyond doubt the best book in this line that has ever been written or published. It is a book that will delight every boy who has a leaning towards electrical experiments. The author writes in a clear and chatty style and while he has a thorough technical knowledge of his subject he has succeeded in treating it in a simple manner so that it is readily intelligible to his young readers. *Among the Chapter Headings and Contents are:* Magnets and Magnetism—Static Electricity—Static Electric Machines—Cells and Batteries—Electro-Magnetism and Magnetic Induction—Electrical Units—Electrical Appurtenances—Electrical Measuring Instruments—Bells, Alarms and Annunciators—Electric Telegraphs—Microphones and Telephones—Induction Coils—Transformers—Wireless Telegraphy—Wireless Telephony—Electric Motors—Dynamos—An Electric Railway—Miniature Lighting—Miscellaneous Electrical Apparatus. *READ WHAT HAS BEEN SAID OF IT.*