Wireless Telegraphy and Telephony

CATALOGUE OF GOOD, PRACTICAL BOOKS testing the Three- and Four-way circuits explained. The grounding of all metallic wiring systems and the reason for doing so shown and explained. The insulation of the metal parts of lamp fixtures and the reason for the same described and illustrated 12o pages. 2nd Edition, revised, and enlarged. Fully illustrated. Flexible cloth Price............................................................_ cents WHAT IS SAID OF THIS BOOK: “The information given is exact and exhaustive without being too technical or over- laden with details.”—Druggists' Circular. HOW TO BECOME A SUCCESSFUL ELECTRICIAN. By Prof. T. O’Conor Sloane. Every young man who wishes to become a successful electrician should read this book it tells m simple language the surest and easiast way to become a successful electrician The studies to be followed, methods of work, field of operation and the requirements of the successful electrician are pointed out and fully explained. Every young en- gineer will find this an excellent stepping stone to more advanced works on electricity ■which he must master before success can be attained. Many young men become dis- couraged at the very out,start by attempting to read and study books that are far beyond their comprehension. This book serves as the connecting link between the rudiments taught in the public schools and the real study of electricity. It is inter- esting from cover to cover. Eighteenth Revised Edition, just issued. 205 pages Illustrated. Price.........................„.......................$l”oÖ STANDARD ELECTRICAL DICTIONARY. By T. O’Conor Sloane. An indispensable work to all interested in electrical science. Suitable alike for the student and professional. A practical handbook of reference containing definitions of about 5,000 distinct words, terms and phrases. The definitions are terse and concise and include every term used in electrical science. Recently issued. An en- tirely new edition. Should be in the possession of all who desire to keep abreast with the progress of this branch of science. In its arrangement and typography the book is very convenient. The word or term defined is printed in black-faced type which readily catches the eye, while the body of the page is in smaller but distinct type. The definitions are well worded, and so as to be understood by the non-technical reader. The general plan seems to be to give an exact, concise definition, and then amplify and explain in a more popular way. Synonyms are also given, and references to other words and phrases are made. A very complete and accurate index of fifty pages is at the end of the volume; and as this index contains all synonyms, and as all phrases are indexed in every reasonable combination of words, reference to the proper place in the body of the book is readily made. It is difficult to decide how far a book of this character is to keep the dictionary form, and to what extent it may assume the encyclopedia form. For some purposes, concise, exactly worded definitions are needed; for other purposes, more extended descriptions are required. This book seeks to satisfy both demands, and does it with considerable success. Complete, concise and con- venient. 682 pages. 393 illustrations. Twelfth Edition. Price .... $3.00 SWITCHBOARDS. By William Baxter, Jr. This book appeals to every engineer and electrician who wants to know the practical side of things. It takes up all sorts and conditions of dynamos, connections and circuits, and shows by diagram and illustration just how the switchboard should be connected. Includes direct and alternating current boards, also those for arc lighting, incandescent and power circuits. Special treatment on high voltage boards for power transmission. 2d Edition. 190 pages. Illustrated. Price............$1.50 telephone construction, installation, wiring, operation and MAINTENANCE. By W. H. Radcliffe and H. C. Cushing. This book is intended for the amateur, the wireman, or the engineer who desires to establish a means of telephonic communication between the rooms of his home, office, or shop. It deals only with such things as may bo of use to him rather than with theories. Gives the principles of construction and operation of both the Bell and Independent instruments: approved methods of installing and wiring them; the means of protecting them from lightning and abnormal currents: their connection together for operation as series or bridging stations; and rules for their inspection and maintenance. Line wiring and the wiring and operation of special telephone systems are also treated. Intricate mathematics are avoided, and all apparatus, circuits and systems are thor- oughly described. The appendix contains definitions of units and terms used in the 15