Telephone Construction, A TREATISE Describing and illustrating up-to-date methods of telephone prac- By W. H. RADCLIFFE, E. E., and H. C. CUSHING, Jr., E. E., Author of "Standard Wiring for Electric Light and Power." SCIENCE Second Revised and Enlarged Edition NEW YORK THE NORMAN W. HENLEY PUBLISHING CO. 132 NASSAU STREET 1915 COPYRIGHTED 1914 AND 1908 BY THE NORMAN W, HENLEY PUBLISHING CO. COMPOSITION, ELECTROTYPING AND PRINTING BY MACGOWAN & SLIPPER NEW YORK PREFACE TO THE SECOND REVISED EDITION THIS book in no way conflicts with the purposes of other publications on telephony, either of encyclopedic character or of less pretentious scope. It 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; between his house and shop; between his home and the homes of his friends; or between his shop and some distant building. It is also for the contractor who desires to do this work for others, or who wishes to build a small exchange in factories, mills, or small towns. The reader is assumed to know absolutely nothing of telephony, and no intricate mathematics are used nor is mention made of any apparatus, circuits, or systems which are not thoroughly illustrated and described with respect to their construction, installation, wiring, operation and mainte nance. The equipments and the methods of wiring presented have been selected with great care from 291893 |