A B C of television; or, Seeing by radio; a complete and comprehensive treatise dealing with the theory, construction and operation of telephotographic and television transmitters and receivers; written especially for home experimenters, radio fans and students.. (1929)

CATALOGUE OF GOOD, PRACTICAL BOOKS ALLOYS AND ALUMINUM METALS AND THEIR ALLOYS. By CHARLES VICKERS. This work is intensely practical, and is indispensable to everyone interested in metals and their alloys. The owner, manager, metallurgist, chemist or the worker in the shop will find here information that heretofore has been so difficult to obtain. It deals with metals from their origin to their useful application, both individually and as parts of alloys, used where strength, ductility, toughness, durability, lightness, color, hard ness, cheapness, conductivity or bearing properties are demanded. The chapters on the casting of copper, the making of manganese bronze, aluminum bronze, aluminum alloys, red brass, yellow brass, steam metals, bearing metals, babbitts, white metals, phosphor bronze, gun metals and nickel alloys are crowded with for mulas, tested and tried, together with the physical properties of the alloys and their casting peculiarities. It is a treasure-house of information for the metal worker, a convenient reference for the trained technical man, and a source of inspiration for the engineer who must select alloys most suitable for his work. 800 (6x9) pages. 110 illustrations. Price $7.50 METALLURGY OF ALUMINUM AND ALUMINUM >LLOYS. By ROBERT J. ANDERSON. This volume is a modern, authoritative treatise on the metallurgy of aluminum and its light alloys, and covers the subject fully from the mining of the ores to the fab rication and applications of the metal. While it has been written especially with a view to being practical, the more theoretical aspects of the subject have not been neglected. The origin, occurrence and distribution of aluminum ores and methods of mining are taken up in an early chapter, while the production of aluminum itself by modern electrolytic methods is also discussed. The uses and applications of the metal and its alloys are treated in detail. Considerable attention is given to the preparation of alloys for casting and working, and the most approved methods for preparing the principal alloys are taken up. The best methods of melting, together with descriptions of the principal types of furnaces, are given detailed treatment. The founding of aluminum alloys, including casting losses and defects, is discussed quite fully, and the information will be of great value to foundrymen in the successful production of castings. 900 pages (6x9). 295 illustrations. Price . . $10.00 AUTOMOBILES THE AUTOMOBILIST'S POCKET COMPANION AND EXPENSE RECORD. By VICTOR W. PAGE. This book is not only valuable as a convenient cost record, but contains much in formation of value to motorists. Includes a condensed digest of auto laws of all States, a lubrication schedule, hints for care of storage battery, and care of tires, location of road troubles, anti-freezing solutions, horse-power table, driving hints and many useful tables and recipes of interest to all motorists. Pocket size. Price $1.00 AUTOMOBILE WELDING WITH THE OXY-ACETYLENE FLAME. By M. KEITH DUNHAM. Explains in a simple manner apparatus to be used, its care, and how to construct necessary shop equipment. Proceeds then to the actual welding of all automobile parts, in a manner understandable by everyone. Gives principles never to be for gotten. This book is of utmost value, since the perplexing problems arising when metal is heated to a melting point are fully explained and the proper methods to overcome them shown. 167 pages. Fully illustrated. Price $1.50 HINTS AND TIPS FOR AUTOMOBILISTS. By VICTOR W. PAGE. The book is ideal for the busy man or woman who wants to know about car operation and upkeep because of the economies possible when an automobile is intelligently operated. It contains many money-saving hints and a brief simple exposition of location and remedy of roadside troubles apt to occur under ordinary operating conditions. Price 75 cents