Wireless Telegraphy #225109

This book was written at the suggestion Of the publisher, Dr. Enke. It was originally intended to be an abridged form Of my larger book Elektromagnetische Schwingungen und drahtlose Telegraphie (stutt gart, It has, however, developed into something quite different; evidence Of this lies in the fact that only 79 Of the 332 illustrations Of the larger book have been reproduced here. Since I began writing this book (winter 1905 — 1906) conditions in wire less telegraphy have changed greatly. The mere fact that new devices and methods have appeared would be Of relatively little importance; but the points Of view determining the consideration Of many Of the problems Of the art have changed entirely. This necessitated rewriting many portions Of the book, which would otherwise have been out Of date from its very publication. I need hardly dwell on what this has meant for both the publisher and myself.