Wireless Telegraphy and Telephony

CATALOGUE OF GOOD, PRACTICAL BOOKS clear and definite understanding of all orders which may be used. The meaning and necessity for certain rules are explained, in such. <1 manner that tlie student may know bevoncl a doubt the rights conferred under any orders he may receive or the action required by certain rules. As nearly all roads require trainmen to pass regular exami- nations, a com clete set of examination questions, with their answers, are included. These will enable the student to pass the required examinations with credit to himself and the road for which b. works. 256 pages. Fully illustrated with Train Signals in Colors. Price...........................................$1.25 THE WALSCHAERT AND OTHER MODERN RADIAL VALVE GEARS FOR LOCOMOTIVES. By Wm. W. Wood. If von would thoroughly understand the Walschaert Valve Gear you should possess a copy of this book, as the author takes the plainest form of a steam engine—a stationary engine in the rough, that will only turn its crank in one direction—and from it builds up—witii the reader’s help—a modern locomotive equipped with the Walschaert Valve Gear, complete. The points discussed are clearly illustrated; two large folding plates that show the positions of the valves of both inside or outside admission type, as well as the links and other parts of the gear when the crank is at nine different points in its revolution, are especially valuable in making the movement clear. 1 h.ese employ sliding cai'dboard models which are contained in a pocket in the cover. The book is divided into five general divisions, as follows: I. Analysis of the gear. 2. Designing and erecting the gear. 3. Advantages of the gear. 4. Questions and answers relating to the Walschaert Valve Gear. 5. Setting valves with the Wal- schaert Valve Gear; the three primary types of locomotive valve motion; modern radial valve gears other than the Walschaert; the Hobart Alb-free Valve and Valve Gear, with questions and answers on breakdowns; the Baker-Pilhoa Valve Gear; the Improved Baker-Pilliod. Valve Gear, with, questions and answers on breakdowns. The questions with full answers given will be especially valuable to firemen and engi- neers in preparing for an examination for promotion. 245 pages, riurd Revised Edition. Price............................................_ WESTINGHOUSE E-T AIR-BRAKE INSTRUCTION POCKET BOOK. By Wm. W. Wood, Air-Brake Instructor. Here is a book for the railroad man, and the man who aims to be one. It is without doubt the only complete work published, on the Westinghouse E-T Locomotive Brake Equipment. Written by an Air-Brake Instructor who knows just what is needed. It covers the subject thoroughly. Everything about the New W estmghouse Engine and Tender Brake Equipment, including the standard No. 5 and the Perfected Wo. b style of brake, is treated, in detail. Written in plain English and profusely illustrated with Colored Plates, which enable one to trace the flow of pressures tnroughout the entire equipment. The best book ever published on the Air Brake. Equally good tor the beginner and the advanced engineer. Will pass any one through any examination. It informs and enlightens you on every point. Indispensable to every engmeman ana trainman. Contains examination questions and answers on the E-T equipment. Covering what the E-T Brake is. How it should be operated. What to do when defective. Not a question can be asked of the engineman up for promotion, on either the No. 5 or the No. 6 E-T equipment, that is not asked and answered in the book. If you want to thoroughly understand the E-T equipment get a copy of tins book. It covers every detail. Makes Air-Brake troubles and examinations easy. Price .... &1.&Ü MACHINE-SHOP PRACTICE AMERICAN TOOL MAKING AND INTERCHANGEABLE MANUFACTURING. By J. V. Woodworth. A “shoppy” book, containing no theorizing, no problematical or experimental devices, there are no badly proportioned and impossible diagrams, no catalogue cuts, but a valuable collection of drawings and descriptions of devices, the rich fruits of the autnoi s own experience. In its 500-odd pages the one subject only. Pool Making, ana what- ever relates thereto, is dealt with. The work stands without a rival. It is a complete practical treatise on the art of American Tool Making and system of interchangeable manufacturing as carried on to-day in the United States. In it are described and illustrated, all of the different types and classes of small tools, fixtures, devices, and special appliances which are in general use in all machine-manufacturing and metal- working establishments where economy, capacity, and interchangeability in the pro- duction of machined metal parts are imperative. The science of jig making is exhaust- 23