PREFACE

Probably no marvel of modern science so grips the imagination as the mystery of those quivering impulses which go forth invisibly to link a ship sailing over the seas with the shores of the distant land.

The author has endeavored to furnish a comprehensive explanation, in simple language, of the theory and practice of this wonderful art, and to explain, as far as possible, the importance of the position occupied by wireless telegraphy to-day and the possibilities of to-morrow.

The title of this book naturally limits the amount of discussion that can be undertaken, and so, in the space at command, there has not been any real attempt made to enter into any engineering or constructive details further than is necessary to make the text clear.