Wireless Telegraphy and Telephony

CATALOGUE OF GOOD, PRACTICAL BOOKS Just Published—A New Book on Automobile Electricity. MODERN STARTING, LIGHTING AND IGNITION SYSTEMS. By Victor W. Page, M.E. This practical volume has been written with special reference to the requirements of the non-technical reader desiring easily understood, explanatory matter, relating to all types of automobile ignition, starting and lighting systems. It can be understood by anyone, even without electrical knowledge, because elementary electrical principles are considered before any attempt is made to discuss features of the various systems. These basic principles are clearly stated and illustrated with simple diagrams. All the leading systems of starting, lighting and ignition have been described and illustrated with the co-operation of the experts employed by the manufacturers. Wiring diagrams are shown in both technical and non-technical forms. All symbols are fully explained. It is a comprehensive review of modern starting and ignition system practice, and includes a complete exposition of storage battery construction, care and repair. All types of starting motors, generators, magnetos, and all ignition or lighting system units are fully explained. The systems of cars already in use as well as those that are to come in 1916 are considered. Every person in the automobile business needs this volume. 5^x7^. Cloth. 530 pages, 297 illustrations, 3 folding plates. Price . . $1.50 MOTORCYCLES, SIDE CARS AND CYCLECARS, THEIR CONSTRUCTION, MANAGEMENT AND REPAIR. By Victor W. Page, M.E. The only complete work published for the motorcyclist and cyclecarist. Describes fully all leading types of machines, their design, construction, maintenance, operation and repair. This treatise outlines fully the operation of two- and four-cycle power plants and all ignition, carburetion and lubrication systems in detail. Describes all representative types of free engine clutches, variable speed gears and power trans- mission systems. Gives complete instructions for operating and repairing all types. Considers fully electric self-starting and lighting systems, all types of spring frames and springs forks and shows leading control methods. For those desiring technical information a complete series of tables and many formulæ to assist in designing are included. The work tells how to figure power needed to climb grades, overcome air resistance and attain high speeds. It shows how to select gear ratios for various weights and powers, how to figure braking efficiency required, gives sizes of belts and chains to transmit power safely, and shows how to design sprockets, belt pulleys, etc. This work also includes complete formulæ for figuring horse-power, shows how dyna- mometer tests are made, defines relative efficiency of air- and water-cooled engines, plain and anti-friction bearings and many other data of a practical, helpful, engineering nature. Remember that you get this information in addition to the practical de- scription and. instructions which alone are worth several times the price of the book. 550 pages. 350 specially made illustrations, 5 folding plates. Cloth. Price . $1.50 WHAT IS SAID OF THIS BOOK: “ Here is a book that should be in the cycle repairer’s kit.”—American Blacksmith. ( “ The best way for any rider to thoroughly understand his machine, is to get a copy of this book; it is worth many times its price.”—Pacific Motorcyclist. AUTOMOBILE AND MOTORCYCLE CHARTS CHART. GASOLINE ENGINE TROUBLES MADE EASY—A CHART SHOW- ING SECTIONAL VIEW OF GASOLINE ENGINE. Compiled by Victor W. Page, M.E. It shows clearly all parts of a typical four-cylinder gasoline engine of the four-cycle type. It outlines distinctly all parts liable to give trouble and also details the de- rangements apt to interfere with smooth engine operation. Valuable to students, motorists, mechanics, repairmen, garagemen, automobile sales- men, chauffeurs, motorboat owners, motor-truck and. tractor drivers, aviators, motor- cyclists, and all others who have to do with gasoline power plants. It simplifies location of all engine troubles, and while it will prove invaluable to the novice, it can be used to advantage by the more expert. It should be on the walls of every public and private garage, automobile repair shop, clubhouse or school. It can be carried in the automobile or pocket with ease, and will insure against loss of time When engine trouble manifests itself. . This sections! view of engine is a complete review of all motor troubles. It is prepared by a practical motorist for all who motor. More information for the money than ever before offered. No details omitted. Size 25x38 inches. Securely mailed on receipt 0£ ........................................................ . 25 cents 5